trắc nghiệm Vật lý 12 847-cAu-tAc-nghiEm-lY-thuyEt-12.thuvienvatly.com.a21c9.33982.doc

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<b>TRAC NGHIEM LY THUYET</b>

<b>TOAN BQ C HI (AG TRINH VAT LY 12 CHUONG I.</b>
<b>DAO DQNG CO HOC</b>

<b>__________________________________________________i____________________________i______</b>
<b>Cau 1. Dao dong ca hoc la</b>

1.

chuyen dong tuan hoan quanh mot vi trl can bang.

2.

chuyen dong lap lai nhieu lan quanh vi trl can bang.

3.

chuyen dong dung dua nhieu lan quanh vi tri can bang.

D. chuyen dong thang bien ddi quanh mot vi trl can bang.

<b>Cau 2. Trong dao dong dieu hoa, phat bieu nao sau day la</b>

khdng dung.

4.

Cu sau mot khoang thai gian T thi vat lai trd ve vi trl ban

dau.

5.

Cu sau mot khoang thai gian T thi van tec cua vat lai trd ve

ga tri ban dau.

6.

Cu sau mot khoang thai gian T thi gia tec cua vat lai trd ve

ga tri ban dau.

D Cu sau mot khoang thai gian T thi bien do vat lai trd ve gia
tri ban dau.

<b>Cau 3. Trong dao dong dieu hoa cua chat diem, chat diem doi</b>

chieu chuyen dong khi

7.

luc tac dung doi chieu.

8.

luc tac dung bang khdng

C luc tac dung co do ldn cuc dai

D. luc tac dung co do ldn cuc tieu.

<b>Cau 4. Van tec cua vat dao dong dieu hoa co do ldn cuc dai khi</b>

9.

vat d vi trl co li do cuc dai.

10.

gia tec cua vat dat cuc dai.

11.

vat d vi trl co li do bang khdng

12.

vat d vi trl co pha dao dong cuc

<b>dai. Cau 5. Dao dong dieu hoa la:</b>

13.

chuyen dong ma trang thai chuyen dong cua vat duoc

lap lai nhu cu sau nhung khoang thai gian bang nhau

14.

chuyen dong cua mot vat dudi tac dung cua mot luc

khdng doi.

15.

hinh chieu cua chuyen dong trdn deu len mot during
thang nam trong mat phang quy dao.

16.

chuyen dong cO quy dao la hinh sin.

<b>Cau 6. Phat bieu nao sau day sai khi noi ve dao dong dieu hoa:</b>

17.

dao dong dieu hda la dao dong tuan hoan.

18.

bien do cua dao dong la gia tri cuc dai cua li do.

19.

van tec bien then cung tan so vdi li do.

D dao dong dieu hoa cri quy dao la during hinh sin. <b>Cau 7. Mot</b>

vat dang dao dong dieu hoa, khi vat chuyen dong tu vi trl bien ve
vi trl can bang thi:

20.

vat chuyen dong nhanh dan deu.

21.

vat chuyen dong cham dan deu.

22.

gia tec cung hudng vdi chuyen dong.

23.

gia tec co do ldn tang dan.

<b>Cau 8. Phat bieu nao sau day ve su so sanh li do, van tec va gia</b>

tec la dung. Trong dao dong dieu hoa, li do, van tec va gia tec la
ba dai luong bien doi dieu hoa theo thai gian va cri

A. cung bien do. B. cung pha.

C cung tan sd goc. D. cung pha ban dau.

<b>Cau 9. Khi nrii ve mot vat dao dong dieu hda co bien do A va chu</b>

ki T, vdi mec thai gian (t = 0) la luc vat d vi trl bien, phat bieu nao
sau day la sai.

T

A. Sau thai gian , vat di duoc quang duing bang 0,5A

T

24.

Sau thai gian —, vat di duoc quang duang bang 2 A

T

25.

Sau thai gian —, vat di duoc quang duang bang A

26.

<b>Sau thai gian T, vat di duoc quang duang bang 4A Cau 10. </b>

Mot vat dao dong dieu hda cri phuang trinh x=Acos

(a

)t+

(p).

Goi v va a lan luot la van tec va gia tec cua vat. He thuc dung la .

2
2 2

<b>A</b>v a A

—

+

—

= A co co

2 2

•

<b>A</b>

<i><b>^=</b></i>_A<b>Cau 11. Luc keo ve tac dung len mot chat diem dao</b>

dong dieu hda ci do ldn

27.

ti le vdi do ldn cua li do va ludn hudng ve vi trl can bang.

28.

ti le vdi binh phuang bien do.

29.

khdng doi nhung hudng thay doi.

30.

va hudng khdng doi.

<b>Cau 12. Trong dao dong dieu hda, gia tri cuc dai cua van tec la</b>

A. vmx = COA B. v,mx = <»

2

2_A

C. = - QA D. vmx = - C02_A

<b>Cau 13. Trong dao dong dieu hda, gia tri cuc tieu cua van tec</b>
A.v_{m i n}=QA. C.v_{m i n}=-la

B. vmn=0.

QA.

D.v_{m i n}=-<b> Cau 14. Mot vat dao dong dieu hda, khi vat di qua vi trl</b>

can bang thi:

31.

do ldn van tec cuc dai, gia tec bang khdng.

32.

do ldn gia tec cuc dai, van tec bang khdng.

33.

do ldn gia tec cuc dai, van tec khac khdng.

34.

do ldn gia tec va van tec cuc dai.

<b>Cau 15. Chon phat bieu sai ve quan he giua chuyen dong trdn deu</b>

va dao dong dieu hoa la hinh chieu cua no.

35.

bien do cua dao dong bang ban Hnh quy dao cua chuyen

dong trdn deu.

36.

van tec cua dao dong bang van tec dai cua chuyen dong
trdn deu.

37.

tan se goc cua dao dong bang tec do goc cua chuyen

dong trdn deu.

38.

li do cua dao dong bang toa do hinh chieu cua chuyen

dong trdn deu.

<b>Cau 16 . Trong dao dong dieu hoa, phat bieu nao sau day la khdng</b>

dung.

A Van tec cua vat dat gia tri cuc dai khi vat chuyen dong qua vi
trl can bang.

2 2

B.

<b>A </b>

<i><b>+</b><b> ^ = </b></i>A2

o o

2
o2

D. ^

<i><b>^ = A </b></i>

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39.

Gia tec cua vat dat gia tri cuc dai khi
vat chuyen dong qua vi trl can bang.

40.

Van tec cua vat dat gia tri cuc tieu khi

vat d mot trong hai vi trl bien.

41.

Gia tec cua vat dat gia tri cuc tieu khi

vat chuyen dong qua vi trl can bang.

<b>Cau 17. Gia tec cua vat dao dong dieu hoa bang </b>

khdng khi

42.

vat d vi trl co li do cuc dai.

43.

van tec cua vat dat cuc tieu.

C vat d vi trl co li do bang khdng D. vat d vi trl
<b>co pha dao dong cuc dai. Cau 18 . Trong dao </b>
dong dieu hoa A gia tec bien doi dieu hoa cung
pha so vdi li do.

44.

gia tec bien doi dieu hoa sdm pha n/2

so vdi li do. C gia tec bien doi dieu hoa

nguoc pha so vdi li do. D. gia tec bien doi
dieu hoa cham pha n/2 so vdi li do.

<b>Cau 19. Dong nang trong dao dong dieu hoa</b>

bien doi theo thai
gian.

A dieu hda vdi chu ky T B. nhu mot ham
cosin.

T

45.

khdng doi. D

dieu hoa vdi chu ky —

<b>Cau 20. Tim dap an sai. Ca nang cua dao dong </b>

dieu hoa bang. A Tong dong nang va the
nang vao thai diem bat ky

46.

Dong nang vao thai diem ban
dau.

47.

The nang d vi trl bien.

48.

Dong nang d vi trl can bang.

<b>Cau 21. Phat bieu nao sau day ve dong nang va</b>

the nang trong dao dong dieu hoa la khdng
dung.

49.

Dong nang va the nang bien

doi dieu hoa cung chu ky.

50.

Dong nang bien doi dieu hoa
cung chu ky vdi van tec.

51.

The nang bien doi dieu hoa

vdi tan se gap 2 lan tan se cua
li do.

52.

Ca nang khong phu thuoc

vao thai gian.

<b>Cau 22. Phat bieu nao sau day ve dong nang va</b>

the nang trong dao dong dieu hoa la khdng
dung.

53.

Dong nang dat gia tri cuc dai khi vat

chuyen dong qua vi tri can bang

54.

Dong nang dat gia tri cuc tieu khi vat d

mot trong hai vi trl bien.

55.

The nang dat gia tri cuc dai khi van tec

cua vat dat gia tri cuc tieu.

D The nang dat gia tri cuc tieu khi gia tec cua
vat dat gia tri cuc tieu.

<b>Cau 23. Ca nang cua mot vat dao dong dieu hda</b>

A bien thien tuan hoan theo thai gian vdi chu
ky bang mot nua chu ky dao dong cua vat.

56.

tang gap ddi khi bien do dao

dong cua vat tang gap ddi.

57.

bang dong nang cua vat khi
vat tdd vi trl can bang.

58.

bien thien dieu hda theo thai gian vdi

chu ky bang chu ky dao dong cua vat.

<b>Cau 24. Khi nrii ve nang luong cua mot vat dao</b>

dong dieu hda, phat bieu nao sau day la dung.

A Cu moi chu ki dao dong cua vat, co ben
thai diem the nang bang dong nang.

59.

The nang cua vat dat cuc dai

khi vat d vi trl can bang.

60.

Dong nang cua vat dat cuc

dai khi vat d vi trl bien.

61.

The nang va dong nang cua vat bien

thien cung tan se vdi tan se cua li do.

<b>Cau 25. Mot vat dao dong dieu hda theo mot</b>

truc ce cfinh (mec the nang d vi trl can bang) thi

62.

dong nang cua vat cuc dai khi gia tec

cua vat co do ldn cuc dai.

63.

khi vat di tu vi trl can bang ra bien, van

tec va gia tec cua vat ludn cung dau.
C. khi d vi trl can bang, the nang cua vat
bang ca nang.

D the nang cua vat cuc dai khi vat d vi trl
bien.

<b>Cau 26. Dieu nao sau day sai ve gia tec cua dao</b>

dong dieu hoa:

A bien thien cung tan se vdi li do x.

64.

luon luon cung chieu vdi
chuyen dong.

65.

bang khdng khi hap luc tac

dung bang khdng.

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<b>Cau 27. Con lac ld xo ngang dao dong dieu hoa,</b>

van tec cua vat bang khdng khi vat chuyen dong
qua A vi trl can bang.

B. vi trl ma luc dan hoi cua ld xo bang
khdng.

C vi trl vat co li do cuc dai.

<b>D. vi trl ma ld xo khong bi bien dang. Cau </b>

<b>28. Trong dao dong dieu hoa cua con lac ld xo, </b>

phat bieu nao sau day la khdng dung.

A Luc keo ve phu thuoc vao do cung cua ld
xo.

67.

Luc keo ve phu thuoc vao

khei luong cua vat nang.

68.

Gia tec cua vat phu thuoc vao

khei luong cua vat.

69.

Tan se goc cua vat phu thuoc vao khei

<b>luong cua vat. Cau 29. Con lac ld xo dang dao </b>
dong dieu hoa, van tec cua vat bang khdng khi
vat di qua :

A vi trl ma ld xo cri chieu dai ldn nhat.

70.

vi trl ma ld xo khong bi bien

dang.

71.

vi trl ma luc dan hoi bang

khdng.

72.

vi trl can bang.

<b>Cau 30. Dao dong dieu hoa cua con lac ld xo</b>

nam ngang. Chon phat bieu sai:

73.

luc dan hoi cua ld xo luon

hudng ve vi trl can bang.

74.

luc dan hoi phu thuoc vao do

cung cua ld xo.

75.

luc dan hoi phu thuoc vao li

do.

D luc dan hoi phu thuoc vao khei luong cua
vat nang <b>Cau 31. Mot con lac ld xo dao dong </b>

khdng ma sat tren mat phang ngang. Phat bieu
nao sau day sai:

76.

dao dong cua con lac la dao

dong tuan hoan.

77.

dao dong cua con lac la dao

dong dieu hoa.

C thai gian thuc hen mot dao dong cang ldn
khi bien do cang ldn.

D. se dao dong thuc hen duoc trong mot gay

ti le thuan vdi

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<b>Cau 32. Mot con lac ld xo dao dong dieu hoa</b>

tren mat phang ngang. Chon phat bieu dung:

78.

do ldn cua luc dan hoi ti le vdi khei

luong m cua vat nang.

79.

luc dan hoi ludn nguoc chieu vdi li do
x.

80.

luc dan hoi ludn cung chieu vdi vecta

van tec

81.

luc dan hoi ludn nguoc chieu vdi vecta

gia tec.

<b>Cau 33. Con lac ld xo treo thang dung co do</b>

cung k, khei luong m,

A

l la do gian cua ld xo

khi d vi trl can bang, g la gia tec trong truang.
He thuc tlnh chu ki cua con lac ld xo la:

A T = 2rc4

C. T

=

2

7i

J— . D. T

=

2

7i.

<b>g , Cau 34. Con lac ld xo dao </b>
dong dieu hoa, khi tang khei luong

cua vat len 4 lan thi tan se dao dong cua vat

A. tang len 4 lan. B. giam di 4

lan.

C. tang len 2 lan. D gam di 2 lan.

<b>Cau 35. Chu ki dao dong cua con lac ld xo phu </b>

thuoc vao:

82.

gia tec cua su rai tu do.

83.

bien do cua dao dong.

84.

dieu kien

klch thlch ban

dau. D khei

luong cua vat
nang.

<b>Cau 36. Tan se cua con lac ld xo phu thuoc vao: </b>

A. bien do dao dong B. khei luong vat

nang.

85.

Bien do dao dong. D. gia tec rai tu

do.

<b>Cau 37. Mot con lac ld xo dang dao dong dieu</b>

hoa. Bien do dao dong phu thuoc vao:
A. do cung cua ld xo. B. khei luong vat
nang.

C dieu kien klch thlch ban dau.

86.

gia tec cua su rai tu do.

<b>Cau 38. Con lac dan dao dong dieu hoa, khi tang</b>

chieu dai cua con lac len 4 lan thi tan se dao
dong cua con lac.

A. tang len 2 lan. B. giam di 2

lan.

C. tang len 4 lan. D. giam di 4

lan.

<b>Cau 39. Trong dao dong dieu hoa cua con lac</b>

dan, phat bieu nao sau day la dung.

87.

Luc keo ve phu thuoc vao chieu dai

cua con lac.

88.

Luc keo ve phu thuoc vao khei luong
cua vat nang.

89.

Gia tec cua vat phu thuoc vao khei

luong cua vat.

90.

Tan se goc cua vat phu thuoc vao khei

<b>luong cua vat. Cau 40. Con lac dan chieu dai </b>
khong doi, dao dong vdi bien do nho co chu ky
phu thuoc vao

A khei luong cua con lac.
B. trong luong cua con lac.

C ti se gua khei luong va trong luong cua con
lac.

<b>D. khei luong rieng cua con lac. Cau 41. Khi </b>
dua mot con lac dan len cao theo phuang thang
dung coi chieu dai cua con lac khdng doi thi tan
se dao dong dieu hoa cua no se

A giam vi gia tec trong truang giam theo do
cao.

B. tang vi chu ky dao dong dieu hoa cua no
giam.

91.

tang vi tan se dao dong dieu hoa cua

no ti le nghich vdi gia tec trong truang.

92.

khdng doi vi chu ky dao dong dieu

hoa cua no khdng phu thuoc vao gia tec trong
truang

<b>Cau 42. Phat bieu nao sau day la sai khi noi ve</b>

dao dong cua con lac dan, bo qua luc can cua
mdi truang.

A Khi vat nang d vi trl bien, ca nang cua con
lac bang the nang cua no.

B. Chuyen dong cua con lac tu vi trl bien ve

vi trl can bang la nhanh dan.

C Khi vat nang di qua vi trl can bang, thi
trong luc tac dung len nri can bang vdi luc cang
cua day.

D. Vdi dao dong nho thi dao dong cua con
lac la dao dong dieu hda.

B. T =

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<b>Cau 43. Mot con lac dan gom soi day co khei</b>

luong khdng dang ke, khdng dan, cri chieu dai l
va vien bi nho co khei luong m. Kich thich cho
con lac dao dong dieu hoa d nai co gia tec trong
truang g. Neu chon mec the nang tai vi trl can
bangcua vien bi thi the nang cua con lac nay d li
do goc a cri bieu thuc la

A mg l (1 - cosa). B. mg l (1 -
sina).

C. mg l (3 - 2cosa). D. mg l (1 +

cosa).

<b>Cau 44. Chu ki dao dong dieu hoa cua con lac</b>

dan phu thuoc vao:

93.

bien do dao dong va chieu dai day

treo.

94.

chieu dai day treo va gia tec trong
truang nai treo con lac.

95.

gia tec trong truang nai treo con lac va

bien do dao dong.

96.

chieu dai day treo, gia tec trong truang

nai treo con lac va bien do dao dong.

<b>Cau 45. Chu ki con lac dan khdng phu thuoc </b>

vao:

A chieu dai l. B. gia tec trong

truang g.

C khei luong vat nang m. D. vi do elia ll.

<b>Cau 46. Mot con lac dan duoc treo tai mot diem </b>

ce dinh. Keo con lac ra khoi vi trl can bang de
day treo hop vdi phuang thang dung mot goc

60Q2A.

0_{roi budng bo qua ma sat. Chuyen dong cua}

con lac la:

A chuyen dong thang deu. B. dao dong tuan

hoan C. chuyen dong trdn deu. D. dao dong
dieu hoa.

<b>Cau 47. Mot con lac dan duoc cho dao dong vdi</b>

bien do nho.

Phat bieu nao sau day la khong dung: A toa do
cua vat nghiem dung phuang trinh:

x = Acos(rot + q>).

97.

van tec cuc dai cua vat ti le nghich vdi
chieu dai cua con lac.

98.

hop luc tac dung len vat ludn nguoc

chieu vdi li do.

99.

gia tec cuc dai cua vat ti le thuan vdi

<b>gia tec trong truang. Cau 48. Trong dao dong </b>
dieu hoa cua con lac dan, phat bieu nao sau day
la dung:

A luc cang day ldn nhat khi vat di qua vi trl
can bang.

100.

luc cang day khdng phu thuoc vao

khei luong cua qua nang.

101.

luc cang day ldn nhat khi con

lac d vi trl bien.

102.

luc cang day khdng phu

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<b>Cau 49. Mot dong ho qua lac chay dung gia tai</b>

mot nai tren mat dat, neu ta dua dong ho len do
cao h coi nhiet do khdng doi

thi:

A dong ho chay cham. B. dong ho chay
nhanh.

C. dong ho van chay dung. D. khong the xac
<b>dinh duoc. Cau 50. Mot con lac dan duoc treo</b>
vao tran cua mot xe d td dang chuyen dong theo

phuang ngang. Chu ky dao dong cua con lac

dan trong truang hop xe chuyen thang deu la T1,

khi xe chuyen dong nhanh dan deu vdi gia tec a

la T2 va khi xe chuyen dong cham dan deu vdi

gia tec a la T3. Bieu thuc nao sau day dung?

A T2=T3 < T1. B. T2=T1=T3.

C. T2 < T1 < T3. D. T2 > T1 >

T3.

<b>Cau 51. Mot con lac dan co chieu dai l, dao</b>

dong dieu hoa tai mot nai co gia tec rai tu do g

vdi hen do goc ao. Khi vat di qua

vi trl co ly do goc a, nri cri
van tec la v . Khi do, ta co bieu thuc: A

—

= a

₀2

-a

2 . B

.a

2

=a

0

-

glv

2

2

2 2

V 2 2

v g

C

a

0

=a +

<b>—</b><i><b>-. D. </b></i>

a

---.

ro

l

<b>Cau 52. Cho mot con lac dan co day treo cach</b>

dien, qua cau m

tlch den q. Khi dat con lac trong khdng khl thi
nri dao dong vdi

chu ki T. Khi dat no vao trong mot dien truang
deu nam ngang

thi chu ki dao dong se

A. tang len B. khdng doi

C. tang hoac giam tuy thuoc vao chieu cua
dien truang

D giam xueng

<b>Cau 53. Dao dong duy tri la dao dong tat dan ma</b>

nguai ta da.

103.

Lam mat luc can cua mdi truang dei

vdi vat chuyen dong.

104.

Tac dung ngoai luc bien doi dieu hoa

theo thai gian vao dao dong.

C Tac dung ngoai luc vao vat dao dong cung
chieu vdi chuyen dong trong mot phan cua tung
chu ky.

D. Kich thich lai dao dong sau khi dao dong
bi tat dan.

<b>Cau 54. Bien do cua dao dong cuong buc khdng</b>

phu thuoc.

A Pha ban dau cua ngoai luc tuan hoan tac
dung len vat.

105.

Bien do cua ngoai luc tuan hoan tac

dung len vat.

106.

Tan se cua ngoai luc tuan hoan tac

dung len vat.

107.

He se luc can cua ma sat nhdt. tac

<b>dung len vat. Cau 55. Phat bieu nao sau day la </b>
khdng dung.

108.

Bien do cua dao dong rieng chi phu

thuoc vao cach kich thlch ban dau de tao len
dao dong.

109.

Bien do cua dao dong tat dan giam dan

theo thai gian.

110.

Bien do cua dao dong duy tri phu

thuoc vao phan nang luong cung cap them cho
dao dong trong moi chu ky.

D Bien do cua dao dong cuong buc chi phu
thuoc vao bien do cua luc cuong buc.

<b>Cau 56. Phat bieu nao sau day la khdng dung.</b>

A Tan se cua dao dong cuong buc ludn bang
tan se cua dao dong rieng.

111.

Tan se cua dao dong cuong buc bang

tan se cua luc cuong buc.

112.

Chu ky cua dao dong cuong buc

khdng bang chu ky cua dao dong rieng.

113.

Chu ky cua dao dong cuong buc bang

chu ky cua luc cuong buc.

<b>Cau 57. Phat bieu nao sau day la khdng dung.</b>

114.

Bien do cua dao dong rieng chi phu

thuoc vao cach kich thlch ban dau de tao len
dao dong.

115.

Bien do cua dao dong tat dan

giam dan theo thai gian.

116.

Bien do cua dao dong duy tri phu

thuoc vao phan nang luong cung cap them cho
dao dong trong moi chu ky.

D Bien do cua dao dong cuong buc chi phu
thuoc vao bien do cua luc cuong buc.

<b>Cau 58. Nhan dinh nao sau day sai khi nrii ve</b>

dao dong ca hoc tat dan.

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117.

Dao dong tat dan la dao dong co bien
do giam dan theo thai gian.

118.

Luc ma sat cang ldn thi dao

dong tat cang nhanh.

119.

Trong dao dong tat dan, ca nang giam

<b>dan theo thai gian. Cau 59. Khi nrii ve dao dong </b>
cuong buc, phat bieu nao sau day la dung.

120.

Dao dong cua con lac dong

ho la dao dong cuong buc.

121.

Bien do cua dao dong cuong buc la

bien do cua luc cuong buc.

C Dao dong cuong buc co bien do khdng doi
va cri tan se bang tan se cua luc cuong buc.

D. Dao dong cuong buc co tan se nho han tan
se cua luc cuong buc.

<b>Cau 60. Nhan xet nao sau day la khdng dung.</b>

122.

Dao dong tat dan cang nhanh neu luc

can cua mdi truang cang ldn.

123.

Dao dong duy tri cri chu ky bang chu

ky dao dong rieng cua con lac.

124.

Dao dong cuong buc co tan se bang

tan se cua luc cuong buc.

D Bien do cua dao dong cuong buc khdng
phu thuoc vao tan se luc cuong buc.

<b>Cau 61. Nhan xet nao sau day la khdng dung.</b>

A Dao dong tat dan cang nhanh neu luc can
cua mdi truang cang ldn.

125.

Dao dong duy tri cri chu ky bang chu

ky dao dong rieng cua con lac.

126.

Dao dong cuong buc co tan se bang

tan se cua luc cuong buc.

D Bien do cua dao dong cuong buc khdng
phu thuoc vao tan se luc cuong buc.

<b>Cau 62. Nguyen nhan gay ra dao dong tat dan</b>

cua con lac dan dao dong trong khdng khl la

127.

do trong luc tac dung len vat.

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C do luc can cua mdi truang.
D. do day treo cri

<b>khei luong dang ke. Cau</b>

<b>63. Phat bieu nao sau </b>

day la dung.

A Trong dao dong tat dan, mot phan ca nang
da bien doi thanh nhiet nang.

129.

Trong dao dong tat dan, mot phan ca

nang da bien doi thanh hoa nang.

130.

Trong dao dong tat dan, mot phan ca

nang da bien doi thanh dien nang.

131.

Trong dao dong tat dan, mot phan ca

nang da bien doi thanh quang nang.

<b>Cau 64. Phat bieu nao sau day la dung. Bien do </b>

cua dao dong cuong buc khdng phu thuoc vao.

A pha ban dau cua ngoai luc tuan hoan tac dung
len vat.

132.

bien do ngoai luc tuan hoan

tac dung len vat.

133.

tan se ngoai luc tuan hoan tac

dung len vat.

134.

he se can cua ma sat nhdt. tac

dung len vat.

<b>Cau 65. Phat bieu nao sau day la dung. Hien</b>

tuong cong hudng chi xay ra vdi.

135.

dao dong dieu hoa. B. dao

dong rieng.

C. dao dong tat dan. D. vdi dao dong

cuong buc<b>. Cau 66. Khi xay ra hen tuong cong </b>
hudng ca thi vat tiep tuc dao dong

A vdi tan se bang tan se dao dong rieng.

136.

ma khong chiu ngoai luc tac

dung.

137.

vdi tan se ldn han tan se dao

dong rieng.

138.

vdi tan se nho han tan se dao

dong rieng.

<b>Cau 67. Khi nrii ve mot he dao dong cuong buc</b>

d giai doan on dinh, phat bieu nao dudi day la
sai.

139.

Tan se cua he dao dong cuong buc

bang tan se cua ngoai luc cuong buc.

140.

Tan se cua he dao dong cuong buc
ludn bang tan se dao dong rieng cua he.

141.

Bien do cua he dao dong cuong buc

phu thuoc vao tan se cua ngoai luc cuong buc.

142.

Bien do cua he dao dong cuong buc

phu thuoc bien do cua ngoai luc cuong buc.

<b>Cau 68. Mot vat dao dong tat dan ci cac dai</b>

luong giam lien tuc theo thai gian la

A. bien do va gia tec B. li do va tec

do

C bien do va nang luong D. bien do va tec
do

<b>Cau 69: Vi trl can bang </b>

cua vat la vi trl AToa
do cua vat bang 0

143.

Tong hop luc tac dung len vat
bang 0

144.

Vat khdng chiu tac dung cua

luc nao ca

145.

Trong qua trinh dao dong van tec cua

<b>vat dat cuc dai. Cau 70: Chon phat bieu sai ve </b>
dao dong tuan hoan

146.

la dao dong ma trang thai dao dong

duoc lap lai nhu cu sau nhung khoang thai gian
khdng doi

147.

la chuyen dong duoc lap lai

lien tiep va mai mai

C giai doan gua 2 dao dong ma trang thai
dao dong lap lai dung nhu trudc la mot dao
dong toan phan

D. thai gian de thuc hen mot dd toan phan la
mot chu ki

<b>Cau 71: Chon cau sai?</b>

A Thai gian vat thuc hien mot dao dong toan
phan goi la chu ki

148.

Khoang thai gian ma trang thai dao
dong cua vat trd lai trang thai ban dau la mot

chu ki.

149.

Tan se cua vat la se dao dong thuc

hien trong mot dan vi thai gian

150.

Tan se tang thi chu ki vat

giam

<b>Cau 72: Trong dao dong dieu hda thi van tec va</b>

li do lech pha nhau mot goc la

A 0 B.

TI

C. - D.<b>Cau 73:</b>

Trong dao dong dieu hda thi van tec va gia tec
lech pha nhau mot goc

A0 B. - C. 2.

--_D.

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<b>Cau 74: Trong dao dong dieu hda bien do cua</b>

vat. Chon phat bieu sai

A la gia tri cuc dai cua toa do vat

B. ludn duang

151.

bang nua quy dao chuyen

dong cua vat

152.

phu thuoc vao

<b>klch thlch ban dau Cau </b>

<b>75: Chon phat bieu sai?</b>

153.

Tai bien van tec triet tieu

154.

Khi di ve vi trl can bang thi tec do cua

vat tang C Van tec dat gia tri cuc tieu khi qua

vi trl can bang

D. Khi qua vi trl can bang thi van tec vat dat
<b>gia tri cuc dai Cau 76: Chon phat bieu dung </b>
nhat? Hinh chieu cua mot chuyen dong trdn deu
len mot duang klnh

155.

la mot dao dong dieu hda

156.

duoc xem la mot dao dong
dieu hda

157.

la mot dao dong tuan hoan

158.

khdng duoc xem la mot dao

dong dieu hda

<b>Cau 77: Chon phat bieu sai? Van tec trong dao</b>

dong dieu hda la dai luong

A bien thien dieu cung tan se cung pha vdi li
do

159.

bang 0 khi vat co toa do cuc

dai

160.

dat gia tri cuc dai khi vat qua vi trl can

bang D doi dau khi qua vi trl can bang

<b>Cau 78: Dao dong ca doi chieu khi</b>

A. luc tac dung doi chieu B. luc tac dung
bang 0

C luc tac dung co do ldn cuc dai

D. luc tac dung co do ldn cuc tieu

<b>Cau 79: Chon cau dung? Gia tec trong dao dong</b>

dieu hda A luon cung pha vdi luc keo ve

161.

luon cung pha vdi li do

162.

dat gia tri nho nhat khi li do

bang 0

-163.

cham pha — so vdi van tec

<b>Cau 80: Khi thay doi klch thlch ban dau thi dai</b>

luong nao sau day thay doi

A tan se vabien do B. phaban dauvabien
do

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<b>Cau 81: Phat bieu nao sau day sai khi noi ve dao</b>

dong dieu hda

A van tec sdm pha — so vdi li do
2

B. gia tec nguoc pha vdi li do

-C van tec cham pha — so vdi li do

<b>D. gia tec vudng pha so vdi van tec Cau 82: </b>
Vat dao dong dieu hda theo phuang trinh x =
Acos(rot + p)(A < 0). Pha ban dau cua vat la

A

p + -

B.

p

<b>Cau 83: Vat dao dong dieu hda theo phuang</b>

trinh x

=

5cos

(rot + p) +

1(cm). Vi trl can bang cua vat

A tai toa do x=0 B. tai x = 1cm

C. tai x = -1cm D. tai x = 5cm

<b>Cau 84: Trong dao dong dieu hda vdi x </b>

=

A
cos

(rot + p)

quanh vi trl can
bang. Chon dap an dung?

164.

pha ban dau cung vdi bien do xac dinh

li do cua vat

165.

p

la pha dao dong tai thai diem t

166.

ro

la tan se goc, la tec do bien thien

cua li do

D A la bien do, la gia tri cua x khi chat diem
d vi trl bien duang

<b>Cau 85: Do thi bieu dien mei quan he giua li do</b>

va van tec la mot

A. duang hinh sin B. duang thang

C duang elip D. duang
hypebol

<b>Cau 86: Do thi bieu dien mei quan he giua gia</b>

tec va li do la
mot

A. duang thang dec xueng B. duang thang
dec len

C. duang elip D. duang hinh

sin

<b>Cau 87: Do thi bieu dien mei quan he giua gia</b>

tec va van tec la
mot

A. duang hinh sin B. duang elip

C. duang thang D. duang

hypebol

<b>Cau 88: Do thi bieu dien mei quan he giua luc</b>

hoi phuc va li
do la mot

A. duang thang dec xueng B. duang thang
dec len

C. duang elip D. duang hinh

sin

<b>Cau 89: Do thi bieu dien mei quan he giua luc</b>

hoi phuc va gia
tec la mot

A. duang thang dec xueng B. duang thang

dec len

C. duang elip D. duang hinh

sin

<b>Cau 90: Trong dao dong dieu hda cua con lac ld</b>

xo thang

dung thi luc dong vai trd la luc hoi phuc la

A luc dan hoi cua ld xo B. luc

quan tlnh cua vat

C tong hop luc dan hoi va trong luc D. trong
luc

<b>Cau 91: Trong dao dong dieu hda cua con lac ld</b>

xo treo thang

dung, luc dan hoi cua ld xo doi chieu khi A. vat
d vi trl cao nhat B. vat d vi trl thap nhat C.

vat qua vi trl can bang D vi trl ld xo khong

bien dang

2_{- x}2₌m_v2 _k

<b>Cau 92: Trong dao dong dieu hda cua con lac ld</b>

xo do cung k, khei luong vat m vdi bien do A
Mei lien he giua van tec va li do cua vat d thai
diem t la

TA 2 A2 m 2

2_{- x}2₌

k

D.x2_{- A}2_{= -v}2 _m

m

<b>Cau 93: Dei vdi con lac ld xo treo thang dung</b>

dao dong dieu hda thi

167.

li do cua vat co do ldn bang do bien

dang cua ld xo

168.

vi trl can bang la vi trl ld xo khong bien

dang

-D

.p +

C

.-p

A A

-B.x2_{- A}2_{=— vC.A}2

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169.

Luc dan hoi ld xo ci do ldn cuc tieu

ludn tai vi trl cao nhat D Luc dan hoi la mot

dai luong dieu hda

<b>Cau 94: Con lac ld xo dat tren mat phang </b>

nghieng gic

a

thi chu ki dao dong rieng cua

con lac phu thuoc vao A chi vao khei luong vat

va do cung ld xo

170.

gric

a

, khei luong vat va do cung ld

xo

171.

gic

a

va do cung ld xo

172.

chi vao gic

a

va do cung ld xo

<b>Cau 95: Con lac dan gan vdi Trai Dat dao dong </b>

vdi bien do nho (bo qua luc can) la A. mot dao
dong tat dan B. dao dong tat dan

C. mot dao dong tu do D dao dong duy tri

<b>Cau 96: Mot vat dao dong dieu hda. Truang hop</b>

nao ci the xay ra? Khi quavi trl can bang nri cri

173.

van tec bang 0, gia tec bang 0

174.

van tec cuc dai,

gia tec bang 0 C van

tec cuc tieu, gia tec
cuc dai

D. van tec bang 0, gia tec cuc dai

<b>Cau 97: Con lacdan dai l, khei luong vat m dao</b>

dong dieu hda tai nai co gia tec trong truang g.
Luc dong vai trd la luc hoi phuc cri gia tri la

B. F

A F = -g

mg_{s " l}

C. F = - gl_{s m}

<b>Cau 98: Luc hoi phuc cua con lac dan dao dong</b>

dieu hda vdi bien do be la

A trong luc B. luc cang day C. luc quan tlnh

D tong hop giua trong luc va luc cang da

<b>Cau 99: Chon phat bieu dung? Gia tec cua con </b>

lac dan dao dong dieu hda

A gom gia tec tiep tuyen va gia tec phap
tuyen

175.

ludn hudng ve vi trl can bang

176.

ludn nguoc ti le vdi li do va nguoc pha

vdi li do

177.

bang 0 tai vi trl can bang

<b>Cau 100: Khi dat mot con lac dan trong mot</b>

thang may. So vdi khi thang may dung yen thi
khi thang may chuyen dong theo phuang thang
dung len tren cham dan deu co gia tec thi chu ki
con lac

A. tang B. giam

C. tang roi giam D. khdng doi

sml

</div>
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<b>Cau 101: Chon phat bieu sai?</b>

178.

Dao dong cua con lac dan vdi goc lech

nho la mot dao dong dieu hda

179.

Dao dong dieu hda cua con lac ld xo

gom vat nang gan vao mot dau ld xo la dao
ddng rieng

180.

Dao dong cua he con lac ld xo va trai

dat duoc xem la mot dao ddng rieng

D Moi dao dong tu do cua mot he dao dong
co tan se khac nhau

<b>Cau 102: Mot con lac dan dat trong mot dien </b>

truang deu co

cac duang suc tu theo phuang thang dung
hudng len. So vdi

khi qua cau khdng tlch dien khi ta tlch dien am
cho qua cau thi

chu ki con lac se

A. tang B. giam

181.

tang roi giam

D. khdng doi

<b>Cau 103: Khi dua dong ho qua lac len cao (coi</b>

nhiet do khdng doi) thi dong ho se

A chay nhanh B. chay cham C. van chay

dung

182.

vua chay nhanh vua chay

cham

<b>Cau 104: Chu ki dao dong nho cua con lac dan </b>

phu thuoc vao A khei luong con lac B.

trong luong con lac

183.

ti se trong luong va khei

luong

184.

khei luong rieng cua con lac

<b>Cau 105: Ung dung quan trong nhat cua con lac </b>

dan la

185.

xac dinh chu ki dao dong

186.

xac dinh

chieu dai con
lac C xac dinh
gia tec trong
truang

D. khao sat dao dong dieu hda cua mot vat

<b>Cau 106: Con lac dan dao dong dieu hda, neu </b>

tang chieu dai len 4 lan, khei luong vat giam 2

lan, trong luong vat giam 4 lan. Thi chu ki dao
dong be cua con lac

A tang 2V2 lan B. tang 2 lan

187.

khdng doi

D. giam 2 lan

<b>Cau 107: Dong nang cua vat dao dong dieu hda</b>

vdi chu ki T bien doi theo thai gian

A vdi chu ki T/2 B. vdi chu ki T

C. khdng doi D. theo ham

dang sin

<b>Cau 108: Con lac ld xo treo thang dung dao</b>

dong dieu hda. Chon phat bieu sai?

188.

The nang tai vi trl thap nhat la

cuc dai

189.

The nang tai vi trl cao nhat la

cuc dai

C The nang cua vat day la the nang dan hoi

D. The nang tai vi trl can bang la cuc tieu

<b>Cau 109: Vat dao dong dieu hda vdi tan se goc</b>

ro

. The nang cua vat

A Bien thien dh vdi tan se goc 2ro

190.

Bien thien dh vdi tan se goc

o

191.

la dai luong bao toan

192.

Bien thien dh vdi tan se goc

<b>Cau 110: Ca nang cua vat dao dong dieu hda </b>

vdi tan se goc

ro

A Bien thien dh vdi tan

se goc 2ro

<b>Cau 111: The nang cua con lac ld xo treo thang </b>

dung

193.

chi la the nang dan hoi

194.

ca the nang trong truang va dan hoi

195.

chi la the nang trong truang

196.

khong ci the nang

<b>Cau 112: Bieu thuc ca nang cua con lac dan dai</b>

l dao dong dieu hda tai nai co gia tec trong

truang g va vdi bien do S0 la

A W = mlSo _2g

B. Bien thien dh vdi tan se goc

ro

C la dai luong bao toan

D. Bien thien dh vdi tan se goc

o

ro

ml2_S

0

2g2 mgS_o

B. W =

mg2_S

o

</div>
<span class='text_page_counter'>(13)</span><div class='page_container' data-page=13>

C. W =

2l2_2l

<b>Cau 113: Trong dao dong dieu hda thi dong </b>

nang va the nang

cua vat dao dong dieu hda bien thien dieu hda
cung tan se va

A. luon cung pha B. ludn nguoc

pha

C. luon vuong pha D. co do lech

pha thay doi

<b>Cau 114: Mot vat dao dong dieu hda. Neu giam</b>

chu ki 2 lan thi ca nang dao dong cua vat se

A. khdng doi B. tang 2 lan

C. giam 2 lan D tang 4 lan

<b>Cau 115: Phu ke noi trong mat chat long, khei</b>

luong m, dien tich phan eng cua phu ke la S,

khei luong rieng cua chat long la

p

. Phu ke

dao dong dieu hda trong chat long vdi tan se
goc la

p S
mg

<b>Cau 116: Vat dao dong dieu hda vdi bien do A,</b>

chu ki T. Van tec trung binh cua vat trong mot
chu ki la

4

A

A 0 B. — C. — D.

—

T TT

C. 2

mgl_{(1 -a0) D. mgl(1-a0)}

2

U

₄

<b>Cau 118: Chon phat bieu sai? Trong dao dong</b>

cua vat chiu luc can nho khdng doi

197.

La dao dong co bien do giam dan theo

thai gian

198.

Chu ki giam dan theo thai gian

199.

Ca nang cua vat giam dan theo thai

gian

200.

Luc can ludn sinh cdng am

<b>Cau 119: Coi mdi truang tao nen luc can cung </b>

thuoc ve he dao

dong thi dao dong cua vat co the coi la

A. dao dong tu do B. dao dong
dieu hda

C. dao dong duy tri D. dao dong cuong
<b>buc Cau 120: Hai con lac lam bang hai hdn bi ci</b>
ban kinh bang nhau, treo ten hai soi day co cung
chieu dai. Khei luong cua hai hdn bi la khac

nhau. Hai con lac cung dao dong trong mot mdi
truang vdi cung bien do. Thi con lac nao tat
nhanh han?

m
PgS

A

PS

m
PgS

2

A
A

B. mgl<b>_{aCau 117: Con lac dan tha khdng van tec dau tu bien do goc a}</b>

</div>
<span class='text_page_counter'>(14)</span><div class='page_container' data-page=14>

A Con lac nhe B. Con lac
nang

C. Tat cung luc D. Chua the ket

luan

<b>Cau 121: Dao dong cua he duoc bu vao nang</b>

luong da mat
sau mot chu ki la:

A. Dao dong duy tri B. Dao dong cuong
buc

C. dao dong dieu hda D. Dao dong tat dan

<b>Cau 122: Dao dong duy tri la dao dong tat dan</b>

ma nguai ta da:

A Lam mat luc can cua mdi truang dei vdi
vat chuyen dong

B. Tac dung ngoai luc bien doi dieu hda theo

thai gian vao

vat chuyen dong

C Bu phan nang luong da mat mat trong mot
chu ki bang mot ca che bu nang luong.

D. Kich thich lai dao dong sau khi tat han.

<b>Cau 122: Chon cau tra lai dung khi noi ve dao</b>

dong cuong buc

201.

la dao dong chiu tac dong cua

luc khdng doi

202.

la dao dong dieu hda cri dang
hinh sin

203.

tan se cua dao dong la tan se

rieng cua he

204.

co bien do thay doi

<b>theo thai gian Cau 124: Bien </b>
do cua dao dong cuong buc

A giam dan theo thai gian B. bang bien do
cua ngoai luc

C ti le thuan vdi bien do cua ngoai luc

D. khdng thay doi khi tan se ngoai luc tang

<b>Cau 125: Khi tan se ngoai luc bang tan se rieng </b>

cua he thi xay ra hien tuong:

A Bien do dao dong dat gia tri cuc dai

205.

Bang gia tri bien do ngoai luc

206.

Bien do dao dong dang tang

nhanh

207.

Bien do

dao dong bang 0

<b>Cau 126: Chon </b>

phat bieu sai:

208.

Dao dong cuong buc la dao dong dudi

tac dung cua ngoai luc tuan hoan

209.

Dao dong duy tri dudi tac dung cua
ngoai luc co tan se rieng bang tan se rieng cua
he

210.

Trong qua trinh chiu tac dung cua

ngoai luc tuan hoan he ludn dao dong vdi tan se
cua ngoai luc.

211.

Dao ddng duy tri va dao dong cuong

buc khi co cong hudng deu co tan se goc bang
tan se rieng cua he

<b>Cau 127: Mot dua be dang danh du tren mot</b>

chiec vong. De cho vong dung dua nhu the mai
ti den diem cao nhat thi nguai me lai day mot
cai. Day la dao dong gi?

A. Dao dong tat dan <b>B. Dao dong duy tri </b>C.

Dao dong cong hudng D. Dao dong cuong buc.

<b>Cau 128: Giam xoc cua dtd la ap dung cua </b>A
dao dong tat dan B. dao dong tu do C. dao
<b>dong duy tri D. dao dong cuong buc Cau </b>

<b>129: Mot dua be chai danh du, ngoi tren tam van</b>

cua chiec du, nguai me day mot cach tuan hoan
theo cung mot cach, nguai me thay bie do cua
du ngay cang tang nhanh. Day

la:

A. dao dong duy tri B. dao dong tu do C.
dao dong cuong buc

D dao dong cuong buc cong hudng <b>Cau 130: </b>

Bien do dao dong cuong buc khdng phu thuoc

A Pha ban dau cua ngoai luc tac dung len vat

212.

Tan se ngoai luc C. He se nhdt cua

luc can D. Bien do cua ngoai luc tuan hoan

<b>Cau 131: Dei vdi mot he dao dong thi ngoai luc </b>

trong dao dong duy tri va dao dong cuong buc
cong hudng khac nhau vi: A tan se khac nhau
B. Bien do khac nhau

213.

Pha ban dau khac nhau

D Ngoai luc dao dong cuong buc doc lap vdi
he cdn dd duy tri ngoai luc duoc dieu khien bdi
mot ca cau lien ket vdi he <b>Cau 132: Khi li do </b>

cua dao dong tong hop bang tong li do cua hai
dao dong hop thanh khi hai dd hop thanh phai
dao dong:

A cung phuang B. cung tan se

C. cung pha ban D. cung bien do

<b>Cau 132: Khi tong hop hai dao dong dieu hda</b>

</div>
<span class='text_page_counter'>(15)</span><div class='page_container' data-page=15>

dong hop thanh quay vdi van tec goc o thi dai
luong thay doi la:

214.

Bien do 2 dao dong hop

thanh

215.

bien do dao dong tong hop

216.

do lech

pha cua hai dao

dong D pha

cua hai dao
dong

<b>Cau 133: Chon cau dung. Hai dao dong dieu </b>

hda cung phuang cung tan se, co do lech pha

Ap. Bien do cua hai dao dong lan luot la A1 va

A2. Bien do cua dd tong hop A co gia tri A ldn

han A1 + A2 B. nho han |A1 - A2|

217.

luon bang

I

( A1 + A2)

2

D|A1 - A2| < A < A1 + A2

<b>Cau 134: Hai dao dong dieu hda cung phuang</b>

cung tan se goc ro, tai thai diem ban dau do lech
pha giua hai dd la Ap. Tai thai diem t do lech ha
cua hai dao dong la

A rot B. Ap C. rot + Ap D.

rot - A p

<b>Cau 135: Xet hai dd cung phuang, cung tan so</b>

Bien do dd tong hop khdng phu thuoc vao yeu
te nao?

218.

Bien do dao dong thu nhat

219.

Bien do

dao dong thu
hai C Tan se
dao dong

D. D lech pha hai dao dong

<b>CIU'ONGII. SONG CO HOC</b>
<b>_________________________________________________________________i</b>
<b>_________________________________________________________________</b>
<b>Cau 136. Song ca la gi.</b>

A Su truyen chuyen dong ca trong khdng
khl.

220.

Nhung dao dong ca hoc lan truyen
trong mdi truang vat chat.

221.

Chuyen dong tuang dei cua

vat nay so vdi vat khac.

222.

Su co dan tuan hoan giua cac phan tu

<b>mdi truang. Cau 137. Sring ngang la sring:</b>

223.

lan truyen theo phuang nam

ngang.

224.

trong do cac phan tu song dao

</div>
<span class='text_page_counter'>(16)</span><div class='page_container' data-page=16>

C trong do cac phan tu song dao dong theo
phuang vudng gric vdi phuang truyen song.

D. trong do cac phan tu song dao dong theo
<b>cung mot phuang vdi phuang truyen song. Cau </b>

<b>138. Budc song la:</b>

A quang duang song truyen di trong 1 s.

225.

khoang cach giua hai bung

song song gan nhat.

226.

khoang cach giua hai diem cua song

co li do bang khdng d cung mot thai diem.

D khoang cach giua hai diem cua song gan
nhat co cung pha dao dong.

<b>Cau 139. Mot song ca hoc co tan se f lan truyen</b>

trong mdi truang vat chat dan hoi vdi tec do v,
khi do budc song duoc tlnh theo cong thuc

A X=vf <i><b>B. X=v/f </b><b>C. X=2v.f D. X=2v/f Cau 140.</b></i>

O mat nudc co hai nguon song dao dong theo
phuang vudng goc vdi mat nudc, co cung
phuang trinh u=Acos(rot). Trong mien gap
nhau cua hai song, nhung diem ma d do cac
phan tu nudc dao dong vdi bien do cuc dai se co
hieu duang di cua song tu hai nguon den do
bang A mot se le lan nua budc song.

227.

mot se nguyen lan budc song.

228.

mot se nguyen lan nua budc

song.

229.

mot se le lan budc song.

<b>Cau 142. Phat bieu nao sau day khdng dung vdi </b>

song ca hoc.

230.

Song ca hoc co the lan truyen duoc

trong mdi truang chat ran.

231.

Sring ca hoc co the lan truyen

duoc trong mdi truang chat
long.

232.

Song ca hoc co the lan truyen

duoc trong mdi truang chat
khi.

D Song ca hoc co the lan truyen duoc trong
mdi truang chan khong.

<b>Cau 143 Phat bieu nao sau day ve song ca hoc la</b>
<b>khdng dung.</b>

233.

Song ca hoc la qua trinh lan truyen dao

dong ca hoc trong mot mdi truang lien tuc.

234.

Sring ngang la sring cri cac
phan tu dao dong theo phuang

ngang.

235.

Sring doc la sring cri cac phan tu dao

dong theo phuang trung vdi phuang truyen
song.

236.

Budc song la quang duang song truyen

di duoc trong mot chu ky.

<b>Cau 144. Phat bieu nao sau day ve dai luong dac</b>

trung cua song ca hoc la khdng dung.

A Chu ky cua song chlnh bang chu ky dao
dong cua cac phan tu dao dong.

B. Tan se cua song chlnh bring tan se dao
dong cua cac phan tu dao dong.

C Tec do cua song chlnh bang tec do dao
dong cua cac phan tu dao dong.

D. Budc song la quang duang song truyen di

duoc trong mot chu ky.

<b>Cau 145. Song ca hoc lan truyen trong mdi</b>

truang dan hoi vdi tec do v khdng doi, khi tring
tan se song len 2 lan thi budc song

A. tang 4 lan. B. tang 2 lan.

C. khdng doi. D giam 2 lan.

<b>Cau 145. Van tec truyen song phu thuoc vao</b>

A. nang luong song. B. tan se dao dong.

C mdi truang truyen song. <b>D. budc song Cau</b>

<b>146. Song ca hoc lan truyen trong khdng khl vdi</b>

cuang do du ldn, tai ta co the cam thu duoc song
ca hoc nao sau day.

237.

Song ca hoc co tan se 10Hz.

238.

Song ca hoc co tan se 30kHz.

239.

Song ca

hoc co chu ky

2,0ps. D Song ca

hoc co chu ky
2,0ms.

<b>Cau 147. Phat bieu nao sau day khdng dung vdi </b>

song ca hoc.

240.

Song ca hoc co the lan truyen duoc

trong mdi truang chat ran.

241.

Song ca hoc co the lan truyen

duoc trong mdi truang chat
long.

242.

Song ca hoc co the lan truyen

duoc trong mdi truang chat
khi.

D Song ca hoc co the lan truyen duoc trong
mdi truang chan khong.

<b>Cau 148. Mot song ca hoc co tan se f = 1000Hz </b>

</div>
<span class='text_page_counter'>(17)</span><div class='page_container' data-page=17>

trong khdng khl. Song do duoc goi la

A sring sieu am. B. sring am.

243.

sring ha am.

D. chua du dieu ken de ket luan.

<b>Cau 149. Tec do truyen song trong mot mdi</b>

truang

A phu thuoc vao ban chat mdi truang va bien
do song. B. phu thuoc vao ban chat mdi

truang va tan se song. C chi phu thuoc vao

ban chat mdi truang.

244.

tring theo cuang do song.

<b>Cau 150. Chon cau sai khi nrii ve su lan truyen </b>

song co

245.

Trang thai dao dong duoc lan

truyen theo song.

246.

Phan tu vat chat lan truyen vdi tec do
bang tec do truyen sing.

247.

Pha dao dong duoc lan truyen

theo song.

248.

Nang luong duoc lan

<b>truyen theo song. Cau 151. </b>
Dieu ken co giao thoa song la
gi.

249.

Ci hai sing chuyen dong

nguoc chieu giao nhau.

250.

Cri hai sring cung tan se va
co do lech pha khdng doi.

251.

Co hai song cung budc song

giao nhau

252.

Co hai song cung bien do, cung tec do

<b>giao nhau. Cau 152. The nao la 2 sring ket hop.</b>
A Hai sring chuyen dong cung chieu va cung

tec do. B. Hai song ludn di kem vdi nhau. C Hai

sring cri cung tan se va co do lech pha khdng
doi theo thai gian.

D. Hai song co cung budc song va co do lech
pha bien thien tuan hoan.

<b>Cau 153. Cri hien tuong gi xay ra khi mot song</b>

mat nudc gap mot khe chrin hep co kch thudc
nho han budc song.

</div>
<span class='text_page_counter'>(18)</span><div class='page_container' data-page=18>

C. Sring gap khe roi dung lai.

D Sring truyen qua khe geng nhu mot tam
phat sring mdi. <b>Cau 154. Phat bieu nao sau day </b>

la khdng dung. Hien tuong giao thoa sing chi
xay ra khi hai song duoc tao ra tu hai tam song
co cac dac diem sau:

A cung tan se, cung pha. B. cung tan se,
nguoc pha.

C. cung tan se, lech pha nhau mot goc khdng
doi.

D cung bien do, cung
pha <b>Cau 155. Phat bieu </b>

nao sau day la dung.

A Hien tuong giao thoa song xay ra khi co

hai song chuyen dong nguoc chieu nhau.

253.

Hien tuong giao thoa song xay ra khi

co hai dao dong cung chieu, cung pha gap nhau.

254.

Hien tuong giao thoa sring xay ra khi

co hai song xuat phat tu hai nguon dao dong
cung pha, cung bien do.

D Hien tuong giao thoa song xay ra khi co
hai song xuat phat tu hai tam dao dong cung tan
se, cung pha <b>Cau 156. Phat bieu nao sau day la </b>

<b>khdng dung.</b>

255.

Khi xay ra hien tuong giao thoa song

tren mat chat long, ton tai cac diem dao dong
vdi bien do cuc dai.

256.

Khi xay ra hien tuong giao thoa song

tren mat chat long, ton tai cac diem khdng dao
dong

257.

Khi xay ra hien tuong giao thoa song

tren mat chat long, cac diem khdng dao dong

tao thanh cac van cuc tieu.

D Khi xay ra hien tuong giao thoa song tren
mat chat long, cac diem dao dong manh tao
thanh cac duang thang cuc dai. <b>Cau 157. Trong </b>

hien tuong giao thoa song tren mat nudc,
khoang cach giua hai cuc dai lien tiep nam tren
duang nei hai tam sring bang bao nhieu.

A bang hai lan budc song. B. bang mot
budc song.

C bang mot nua budc song

258.

bang mot phan tu budc song.

<b>Cau 158. De khao sat giao thoa song ca, nguai ta</b>

be trl tren mat nudc nam ngang hai nguon ket

hop S1 va S2. Hai nguon nay dao dong dieu hda

theo phuang thang dung, cung pha. Xem bien
do song khdng thay doi trong qua trinh truyen

song. Cac diem thuoc mat nudc va nam tren

duang trung truc cua doan S1S2 se

259.

dao dong vdi bien do bang

nua bien do cuc dai

260.

dao
dong vdi bien

do cuc tieu C

dao dong vdi
bien do cuc dai

D. khdng dao
dong

<b>Cau 159. Dieu kien de hai sing ca khi gap nhau,</b>

giao thoa duoc vdi nhau la hai sring phi xuat
phat tu hai nguon dao dong

261.

cung tan se, cung phuang

262.

cung bien do va co hieu se

pha khdng doi theo thai gian

263.

cri cung pha ban dau va cung

bien do

D cung tan se, cung phuang va cri hieu se
pha khdng doi theo thai gian

<b>Cau 160. Ta quan sat thay hien tuong gi khi tren</b>

day cri sring dung.

A Tat ca phan tu day deu dung yen.

D. Tat ca cac diem tren day deu chuyen dong
vdi cung tec

do.

264.

Tren day cri nhung bung
song xen ke vdi nut song.

265.

Tat ca cac diem tren day deu dao dong

vdi bien do cuc dai.

<b>Cau 161. Khi cri sring dung tren soi day dan hoi </b>

thi: A tat ca cac diem cua day deu dung dao
dongB. nguon phat

sring dung dao dong. C tren day cri nhung diem

dao dong vdi bien do cuc dai xen
ke vdi nhung diem dung yen.

266.

tren day chi cdn sring phan xa, cdn

<b>sring tdi thi dung lai. Cau 162. Hien tuong song </b>
dung tren day dan hoi, khoang cach giua hai nut
song lien

A bang hai lan budc song. B. bang mot budc
song.

C bang mot nua budc song.

</div>
<span class='text_page_counter'>(19)</span><div class='page_container' data-page=19>

thai gian giua hai lan lien tiep soi day duoi thang
la

A V

_.

_B

_.

nv_{. C}

.

_-L._n-L.

nl l 2nv nv

<b>Cau 164. Mot soi day dan hoi duoc cang ngang</b>

giua hai diem ce dinh A va B. Khi tao ra duoc
song dung tren day thi van tec truyen song tren
day duoc xac dinh theo nhung yeu te nao.

267.

Chu ky song va khoang cach

AB.

A Tan se song, se bung song xuat hien va

khoang cach AB.

268.

Se nut song xuat hien va tan

se song.

269.

Chieu dai cua cac bung song va bien

do dao dong ldn nhat tren day.

<b>Cau 165. Cam gac ve am phu thuoc nhung yeu </b>

te nao. A Nguon am va mdi truang truyen
am.

270.

Nguon am va tai nguai nghe.

271.

Mdi truang truyen am va tai

nguai nghe.

272.

Tai nguai nghe va gay than

knh thi giac.

<b>Cau 166. Do cao cua am phu thuoc vao yeu te </b>

nao cua am.

273.

Do dan hoi cua nguon am.

274.

Bien do dao

dong cua nguon am.

C Tan se cua nguon
am.

<b>D. Do thi dao dong cua nguon am. Cau 167. </b>
Tai con nguai co the nghe duoc nhung am co
muc cuang do am trong khoang nao.

A. Tu 0 dB den 1000 dB. B. Tu 10 dB den
100 dB.

C. Tu -10 dB den 100dB. D Tu 0 dB den

130 dB.

<b>Cau 168. Am ca ban va hoa am bac 2 do cung </b>

mot day dan phat ra cri mei lien he vdi nhau
nhu the nao. A Hoa am co cuang do ldn han
cuang do am ca ban

275.

Tan se hoa am bac 2 ldn gap
ddi tan se am ca ban.

276.

Tan se am ca ban ldn gap ddi

tan se hoa am bac 2.

277.

Tec do am ca ban ldn gap ddi tec do

<b>hoa am bac 2. Cau 169. Trong cac nhac cu, hop </b>
dan cri tac dung gi.

</div>
<span class='text_page_counter'>(20)</span><div class='page_container' data-page=20>

278.

Tranh duoc tap am va tieng on, lam
cho tieng dan trong treo.

279.

Giu cho am phat ra co tan se

on dinh.

280.

Vua khuyech dai am, vua tao ra am
sac rieng cua am do dan phat ra.

<b>Cau 170. Phat bieu nao sau day la khdng dung.</b>

A. Song am la song ca hoc co tan se nam

trong khoang tu

16Hz den 20kHz

281.

Sring ha am la song ca hoc co

tan se nho han 16Hz.

282.

Song sieu am la song ca hoc co tan se

ldn han 20kHz. D Sring am thanh bao gom

ca song am, ha am va sieu am.

<b>Cau 170. Tec do am trong mdi truang nao sau</b>

day la ldn nhat.

283.

Mdi truang khdng khl loang.

284.

Mdi truang khdng khl.

285.

Mdi truang

nudc nguyen chat. D

Mdi truang chat ran.

<b>Cau 171. Phat bieu nao sau day la khdng dung. </b>

A Nhac am la do nhieu nhac cu phat ra.

286.

Tap am la cac am cri tan se

khdng xac dinh.

287.

Do cao cua am la mot dac

tlnh cua am.

288.

Am sac la mot

<b>dac tlnh cua am. Cau </b>

<b>172. Phat bieu nao sau </b>

day la dung.

289.

Am co cuang do ldn thi tai ta

cri cam giac am do "to".

290.

Am co cuang do nho thi tai ta

cri cam giac am do "be".

291.

Am ci tan se ldn thi tai ta ci

cam giac am do "to".

D Am "to" hay "nho" phu thuoc vao muc
cuang do am va tan se am.

<b>Cau 173. Nhan xet nao sau day la khdng dung.</b>

Mot nguon am phat ra mot am co tan se khdng
doi, tan se am ma may thu, thu duoc:

292.

tang len khi nguon am

chuyen dong lai gan may thu.

293.

giam di khi nguon am

chuyen dong ra xa may thu.

294.

tang len khi may thu chuyen

dong lai gan nguon am.

D khdng thay doi khi may thu va nguon am
cung chuyen dong hudng lai gan nhau.

<b>Cau 174. trong truang hop nao dudi day thi am</b>

do may thu ghi nhan duoc co tan se ldn han tan
se cua am do nguon phat ra.

A Nguon am chuyen dong ra xa may thu
dung yen.

B. May thu chuyen dong ra xa nguon am
dung yen.

C May thu chuyen dong lai gan nguon am
dung yen.

295.

May thu chuyen dong cung chieu,

cung tec do vdi nguon am.

<b>Cau 175. Nhan xet nao sau day la khdng dung.</b>

A Mot nguon am phat ra mot am co tan se
khdng doi, tan se am ma may thu thu duoc tang
len khi nguon am chuyen dong lai gan may thu.

296.

Mot nguon am phat ra mot am co tan

se khdng doi, tan se am ma may thu thu duoc
giam di khi nguon am chuyen dong ra xa may
thu.

297.

Mot nguon am phat ra mot am co tan

se khdng doi, tan se am ma may thu thu duoc
tang len khi may thu chuyen dong lai gan nguon
am.

D Mot nguon am phat ra mot am co tan se
khdng doi, tan se am ma may thu, thu duoc
khdng thay doi khi may thu va nguon am cung
chuyen dong hudng lai gan nhau<b>. Cau 176. Khi </b>
nguon phat am chuyen dong lai gan nguai nghe
dang dung yen thi nguai nay se nghe thay mot
am:

298.

co budc song dai han so vdi

khi nguon am dung yen.

299.

co cuang do am ldn han so

vdi khi nguon am dung yen.

300.

cri tan se nho han

tan se cua nguon am. D

cri tan se ldn han tan se
cua nguon am.

<b>Cau 177. Khi sing am truyen tu mdi truang </b>

khdng khl vao mdi truang nudc thi A chu ki cua
no tang.

301.

tan se cua no khdng thay doi.

</div>
<span class='text_page_counter'>(21)</span><div class='page_container' data-page=21>

303.

budc song cua no khdng thay
doi.

<b>Cau 178. Mot song ca lan truyen tren mot duang</b>

thang tu diem O den diem M cach O mot doan
<i><b>d.Biet tan se f budc song X va bien do a cua</b></i>
song khdng doi trong qua trinh sring truyen.
Neu phuang trinh dao dong cua phan tu vat chat

tai diem M co dang uM = acos(2-ft) thi phuang

trinh dao dong cua phan tu vat chat tai O la

Au0 ₀

=

acos2

-f

ft

-

d

I

I xj

304.

u0

=

acos2-|^ ft

+

-

d

_-j

305.

_u0

₌

_acos

_-|

_ft

_-

_d

_I

0

_{I xj}

306.

u0

=

acos

rc^

ft

+ -

d

_j

<b>Cau 179. Khi nii ve song am, phat bieu nao sau </b>

day la sai.

307.

O cung mot nhiet do, tec do truyen

song am trong khdng khi nho han tec do truyen
song am trong nudc.

308.

Sing am truyen duoc trong

cac mdi truang ran, long va
khi.

C. Sing am trong khong khi la
sing doc.

D Sring am trong khong khi la
sring ngang

<b>Cau 180: Chon nhan xet sai ve qua trinh truyen</b>

song. Qua trinh truyen song la qua trinh

309.

lan truyen dao dong trong

mdi truang vat chat theo thai
gian

310.

lan truyen trang thai dao dong trong

mdi truang truyen sring theo thai gian

311.

truyen nang luong dao dong trong mdi

truang truyen sring theo thai gian

D lan truyen phan tu vat chat trong mdi
truang truyen song theo thai gian

<b>Cau 181: Nhan xet nao la dung ve song ca hoc. </b>

Song ca hoc

312.

chi truyen duoc trong khdng

khi

313.

khong truyen trong mdi
truang chan khdng

314.

truyen duoc trong tat ca cac

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D. chi truyen duoc trong mdi truang vat chat,
ke ca mdi truang chan khdng

<b>Cau 182: De phan loai song ngang va sring doc</b>

nguai ta can cu vao

315.

Mdi truang truyen song

316.

Phuang dao dong cua phan tu vat chat

317.

Van tec truyen song

D Phuang dao dong cua cac phan tu vat chat
va phuang truyen song

<b>Cau 183: Sring ngang la sring:</b>

318.

lan truyen theo phuang nam ngang

319.

ci cac phan tu song dao dong theo

phuang nam ngang C cri cac phan tu song

dao dong theo phuang vudng goc vdi
phuang truyen song

D. ci cac phan tu song dao dong cung mot

phuang vdi

phuang truyen song

<b>Cau 184: Sing ngang</b>

A Chi truyen duoc trong chat ran.

320.

Truyen duoc trong chat ran va be mat
chat long

321.

Khong truyen duoc trong chat ran

322.

Truyen duoc trong chat ran, chat long

va chat khl

<b>Cau 185: Dieu nao sau day la dung khi noi ve</b>

phuang dao dong cua song doc?

323.

Nam theo phuang ngang

324.

Nam theo

phuang thang dung

C Theo phuang
truyen song

D. Vuong gric vdi phuang
<b>truyen song Cau 186: Sing </b>
doc

A Truyen duoc chat ran, long, khl

325.

Co phuang dao dong vudng goc vdi

phuang truyen song

326.

Truyen duoc qua chan khdng

327.

Chi truyen duoc trong chat ran

<b>Cau 187: Chon phat bieu sai? Trong song ca </b>

hoc thi

328.

duoc tao thanh nha luc lien ket cua cac

phan tu mdi truang truyen dao dong

329.

khong truyen duoc trong chan khdng

C Phan tu d xa tam dao dong thi dao dong
nhanh pha han

D khi lan truyen thi mang theo nang luong

<b>Cau 188: Neu luc dan hoi xuat hien khi co bien </b>

dang nen gian thi moi truang truyen la

A sring ngang B. ca song

ngang va sring doc

C sring doc D. khong phai
song ca

<b>Cau 189: Budc song X cua song ca hoc la:</b>

A La quang duang song truyen di trong thai
gian 1 chu ky sing

330.

La khoang cach giua hai diem dao

dong dong pha tren phuang truyen song

331.

La quang duang song truyen duoc

trong 1 s

332.

La khoang cach ngan nhat giua hai

diem vudng pha tren phuang truyen song

<b>Cau 190: Nhan xet nao sau day la dung dei vdi</b>

qua trinh truyen song

A Van tec truyen song khdng phu thuoc vao
mdi truang truyen song

333.

Nang luong song cang giam khi song

truyen di cang xa nguon

334.

Pha dao ddng khdng doi

trong quatrinh truyen song

D Van tec truyen song khdng phu thuoc vao
tan se cua sing

<b>Cau 191: Chon phat bieu sai? </b>A Chu ki va tan
se phu thuoc vao mdi truang song

335.

Bien do song la bien do tai moi diem

trong khdng gian sing

336.

Nang luong song ti le vdi

binh phuang bien do song

337.

Tec do truyen song phu thuoc vao ban

<b>chat mdi truang Cau 192: Trong hien tuong </b>
song tren mat nudc do mot nguon sring gay ra,
neu goi budc song la X, thi khoang cach giua n
vdng trdn sring lien tiep nhau se la

A n X B. (n - 1)X C. 0,5nX D. ( n+1)

<b>X Cau 192: Chon cau tra lai dung. Khi mot </b>
song ca hoc truyen tu khdng khl vao nudc thi
dai luong dac trung cua song khdng thay doi.

A Tan se B. Budc song C. Van tec D.
<b>Nang luong Cau 193: Tec do truyen song ca </b>
hoc giam dan theo thu tu cac mdi truang :

A Ran, khl va long. B. Khi, long va ran.

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<b>Cau 194: Van tec truyen song ca hoc phu thuoc</b>

vao yeu te nao ?

338.

Tan se song. C. Bien do cua

song. D. Budc song.

339.

Ban chat cua mdi truang
truyen song.

<b>Cau 195: Dieu nao sau day la dung khi nii ve</b>

nang luong sring trong mot mdi truang ll tudng

340.

Trong khi truyen song thi

nang luong khdng duoc truyen
di.

341.

Qua trinh truyen song la qua
trinh truyen nang luong.

342.

Khi truyen song nang luong cua song

giam ti le vdi binh phuang bien do.

D . Khi truyen song nang luong cua song
tang ti le vdi binh phuang bien do.

<b>Cau 196: Chon phat bieu sai? Trong qua trinh</b>

truyen song vdi chu ki T, budc song X

A Tren mot phuang truyen song den diem
nao trudc thi diem do nhanh pha han

B. Sring tuan hoan theo thai gian vdi chu ki
T

T

C Tuan hoan theo khong gian vdi chu ki —.

343.

Truyen song tuc la

<b>truyen pha dao dong Cau 197: </b>
Chon phat bieu dung?

A Nhung diem cach nhau bang se nguyen
lan budc sring thi dao dong cung pha vdi nhau

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C. Nhung diem cach nhau bang se le lan nua
budc song thi dao dong nguoc pha vdi nhau

D Nhung diem cach nhau bang se nguyen
lan budc song tren mdt phuang truyen thi dao
dong cung pha vdi nhau <b>Cau 198: Nhung diem </b>

nao sau day dao dong vudng pha vdi nhau?

344.

cach nhau bang se le lan budc

song

345.

cach nhau bang se le lan nua budc
song tren mot phuang truyen song

346.

cach nhau bang se le lan nua

budc song

347.

cach nhau bang se le lan budc song

tren mot phuang truyen song

<b>Cau 199: De hai song giao thoa duoc vdi nhau</b>

thi chung phai ci:

ACung tan se, cung bien do va cung pha

348.

Cung tan se, cung bien do va
hieu pha khdng doi theo thai

gian.

349.

Cung tan se va cung pha.

350.

Cung tan se va hieu pha khdng doi

<b>theo thai gian. Cau 200: Chon phat bieu sai khi </b>
noi ve su giao thoa song?

A La hien tuong hai hay nhieu song ket hop
gap nhau tai nhung diem xac dinh, ludn ludn
lam tang cuang hoac lam yeu nhau

351.

Dieu ken giao thoa song phai xuat phat

tu hai nguon song ket hop

352.

Sring tong hop tai mot diem bang tong

hop dao dong cua hai thanh phan do hai nguon
truyen den

D Bien do tong hop chi phu thuoc vao bien
do cua cac thanh phan

<b>Cau 201: Truang hop nao sau day xem la hai </b>

nguon ket hop? A cung phuang dao dong,

cung tan se, nguoc pha

353.

cung phuang dao dong, cung

bien do, cung pha

354.

cung phuang dao dong, cung

bien do, nguoc pha

355.

cung phuang dao dong, cung bien do,

<b>vudng pha. Cau 202: Chon phat bieu sai? Su </b>
nhieu xa song

A la hien tuong khi gap vat can song di lech
khoi phuang truyen thang va di vdng qua vat
can.

356.

la hien tuong khi gap vat can
va sring bi phan xa trd lai.

357.

Neu song di qua khe hep ma khoang

cach khe nho han budc song thi khe trd thanh
mot nguon phat song thu cap

358.

Budc song cang ldn thi cang

de quan sat hien tuong nhieu
xa

<b>Cau 203: Tren mat chat long co hai nguon song</b>

dao dong vdi cung bien do, cung tan se va cung
pha. Ta quan sat duoc he cac van dei xung. Neu
bien do cua mot nguon tang len gap ddi thi

A: Hien tuong giao thoa van xay ra, hinh

dang va vi trl cua cac van giao thoa khdng thay
doi.

B. Hien tuong giao thoa van xay ra, vi trl cac
van khdng doi nhung van cuc tieu ldn han va
cuc dai cung ldn han.

C: Hien tuong giao thoa van xay ra, nhung vi
trl cac van cuc dai va cuc tieu doi cho cho nhau.

D: Khong xay ra hien tuong giao thoa nua

<b>Cau 204: Khi xay ra hien tuong giao thoa song</b>

nudc vdi hai nguon ket hop nguoc pha A, B.
Nhung diem tren mat nudc nam tren duang
truing truc cua AB se:

359.

Dung yen khdng dao dong.

360.

Dao dong vdi bien do be
nhat.

361.

Dao dong vdi bien do ldn

nhat.

362.

Dao dong vdi bien do co gia tri truing

<b>binh. Cau 205: Sring dung la:</b>

363.

sing khong lan truyen nua do

bi vat can.

364.

sing tao thanh giua hai diem ce dinh

trong mot mdi truang.

365.

song tren day ma hai dau day duoc gu

ce dinh. D do su giao thoa giua song tdi va

sring phan xa

<b>Cau 206: Chon phat bieu sai? Trong su phan xa </b>

song A Sring phan xa cung tan se va cung
budc song vdi song tdi B. Phan xa d dau ce
dinh thi sing phan xa nguoc pha vdi
sring tdi

C O dau phan xa ce dinh la mot bung song

366.

Phan xa d dau tu do thi sing

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<b>Cau 207: Sring dung xay ra tren day dan hoi </b>

mot dau ce dinh mot dau tu do khi: A Chieu dai

cua day bang mot se le phan tu budc song.

367.

Budc song bang gap ddi

chieu dai cua day.

368.

Chieu dai cua day bang se

nguyen lan nua budc song.

369.

Chieu dai cua day bang mot se nguyen

<b>nua budc sring. Cau 208: Sing dung tao ra tren </b>
day dan hoi hai dau ce dinh

khi:

A Chieu dai cua day bang mot phan tu budc
song.

370.

Budc song bang boi se le cua chieu dai

day. C Budc song gap ddi chieu dai day.

D. Chieu dai cua day bang se nguyen lan nua
<b>budc song. Cau 209: Ung dung quan trong nhat </b>
cua song dung la xac dinh

A. budc song B. tec do truyen

song

371.

tan se song D.

bien do song

<b>Cau 210: De tang do cao cua am thanh do mot</b>

day dan phat ra ta phai:

A Keo cang day dan han. B. Lam trung day
dan han.

C. Gay dan manh han. D. Gay dan nhe
<b>han. Cau 211: Chon cau dung? Cam giac ve am </b>
phu thuoc vao

A. tan se am B. tan se va tai

nguai

C. nguon am D. nguon am va

tai nguai nghe

<b>Cau 212: Chon cau sai?</b>

372.

Trong chat long va khi thi

sing am la sing ngang.

373.

Trong chat ran song am chi
co song doc

374.

Nhac am la am co duang ghi am la

nhung duang cong tuan hoan ci tan se xac dinh

375.

Nhac am la am co duang ghi am la

nhung duang cong khong tuan hoan

<b>Cau 213: Do cao cua am phu </b>

thuoc vao
A cuang do am

B. do thi am

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<b>Cau 214: Do to cua am khdng phu thuoc vao dai luong vat ly nao</b>

sau day cua am?

A. cuang do am B. bien do am

C do thi am D. tan se am

<b>Cau 215: Do to cua am duoc do bang</b>

A. cuang do am B. tan se am

C. bien do am D Muc cuang do am

<b>Cau 217: Chon phat bieu sai?</b>

376.

Am cang cao thi tan se cang ldn, am cao goi la am bong,

am thap goi la am tram

377.

Tai nguai co the cam nhan duoc nhung am co

tan se tu

16Hz den 20.000Hz

378.

Tan se ldn han 20.000Hz goi la sieu am, nho han 16Hz

la ha am.

D Tai nguai khdng the nghe duoc song sieu am <b>Cau 218: Am </b>

manh nhat co muc cuang do am la 130dB gay dau nhuc nhei cho
tai vdi

A moi tan se B. chi co am tren 1000Hz

379.

chi co am ldn han 20kHz

380.

chi co am dudi 1000Hz

<b>Cau 219: Hai am thanh cri am sac khac nhau la do:</b>

A. Khac nhau ve tan se. B. Do cao va do to khac nhau.
C. Tan se, bien do cua cac hoa am khac nhau.

D Cri se luong va cuang do cua cac hoa am khac nhau. <b>Cau </b>
<b>220: Am thanh do hai nhac cu phat ra luon khac nhau ve:</b>

A. Do cao. B. Do to. C Am sac. <b>D. tan se. Cau 221: Am </b>

thanh do nguai hay mot nhac cu phat ra co do thi duoc bieu dien
theo thai gian co dang:

A. Duang hinh sin. B. Bien thien tuan hoan.

<b>C. Duang hyperbol. D. Duang thang. Cau 222: Cuang do </b>
am duoc xac dinh bdi:

A. Ap suat tai mot diem trong mdi truang khi co song am
truyen qua.

BNang luong ma sring am truyen qua mot dan vi dien tlch
vuong gric vdi phuang truyen am trong mot dan vi thai gian.

381.

Binh phuang bien do am tai mot diem trong mdi truang

khi cri sring am truyen qua.

382.

<b>Nang luong ma am truyen qua tai mot diem. Cau 223: </b>

Chon dap an sai?

383.

Dei vdi day dan hai dau ce dinh tan se hoa am bang se

nguyen lan tan se am ca ban

384.

Day dan keo cang bang luc ce dinh se dong thai phat ra

am ca ban va mot se hoa am.

C Dei vdi eng sao mdt dau kn va mot dau hd tan se hoa am
bang se nguyen lan tan se am ca ban

D. Dei vdi eng sao mdt dau kn va mot dau hd se xay ra song
dung trong eng neu chieu dai eng bang se le lan mot phan tu budc
song

<b>Cau 224: Chon cau tra lai sai</b>

A Sring am la nhung song ca hoc doc lan truyen trong mdi
truang vat chat.

B. Sring am, sring sieu am, sring ha am ve phuang dien vat ll
cri cung ban chat.

385.

Sing am truyen duoc trong moi mdi truang vat chat dan
hoi ke ca chan khdng.

386.

Van tec truyen am trong chat ran thuang ldn han trong

chat long va trong chat khl.

<b>Cau 225: Luong nang luong duoc song am truyen trong mot dan</b>

vi thai gian qua mot dan vi dien tlch dat vudng goc vdi phuang
truyen am goi la:

A Cuang do am. B. Do to cua am.

<b>C. Muc cuang do am. D. Nang luong am. Cau 226: Hai am </b>
co cung do cao la hai am cri:

A. Cung tan se. B. Cung bien do.

<b>C. Cung budc song. D. Cung am sac. Cau 227: Trong cac </b>
nhac cu thi hop dan cri tac dung:

387.

Lam tang do cao va do to am

388.

Vua khuech dai am, vua tao am sac rieng cua am do dan
phat ra

389.

Giu cho am co tan se on dinh

390.

Tranh duoc tap am va tieng on lam cho tieng dan trong

treo

<b>Cau 228: Dieu nao sau day dung khi noi ve song am? </b>A Tap am
la am cri tan se khdng xac dinh

391.

Nhung vat lieu nhu bdng, nhung, xep truyen

am tet

392.

Van tec truyen am tang theo thu tu mdi truang:

ran, long,
khi

393.

<b>Nhac am la am do cac nhac cu phat ra Cau 229: Khi am </b>

di tu khdng khl vao nudc thi

394.

tan se giam, van tec tang B. tan se tang, van tec giam C

Tan se khdng doi, van tec tang

<b>D. tan se khdng doi va van tec giam Cau 230: Tec do truyen am </b>
phu thuoc vao A Tan se am va khei luong rieng cua mdi truang

395.

Ban chat cua am va khei luong rieng cua mdi

truang

396.

Tlnh dan hoi cua mdi truang va ban chat nguon am D

Tlnh dan hoi va khei luong rieng cua mdi truang

<b>Cau 231: Chon cau dung Dac trung vat ly cua am bao gom:</b>

397.

Tan se, cuang do am, muc cuang do am va do thi dao
dong cua am

398.

Tan se, cuang do, muc cuang do am va bien do dao dong

cua am

399.

Cuang do am, muc cuang do am, do thi dao dong va

bien do dao dong cua am

400.

Tan se, cuang do am, muc cuang do am, do thi dao dong

va bien do dao dong cua am

<b>Cau 232: Dei vdi am ca ban va hoa am bac 2 cua cung 1 day dan</b>

phat ra thi

401.

hoa am bac 2 co cuang do ldn gap 2 lan cuang do am ca

ban

402.

Tan se hoa am bac 2 ldn gap ddi tan se am ca
ban

403.

Tan se am ca ban ldn gap ddi tan se hoa am bac

2

404.__________________________________

Van

tec truyen am ca ban gap ddi van tec truyen hoa am
bac 2

<b>CI II (AG III. DONG DIEN XOAY CHIEU</b>

<b>A. ---*---^--- -/v</b>

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405.

co cuang do bien thien tuan
hoan theo thai gian.

406.

ci chieu bien doi theo thai

gian.

C co cuang do bien doi dieu hoa theo thai
gian.

<b>D. cri chu ky khdng doi. Cau 234. Chon cau </b>
dung. Cac gia tri hieu dung cua ddng dien xoay
chieu:

A duoc xxay dung dua tren tac dung nhiet
cua ddng dien.

407.

duoc do bang ampe ke nhiet.

408.

bang gia tri truing binh chia

cho

V

2 .

409.

bang gia tri cuc dai chia cho

2.

<b>Cau 235. Dei vdi ddng dien xoay chieu cach</b>

phat bieu nao sau day la dung.

A Trong cong nghiep, co the dung ddng dien
xoay chieu de ma dien.

410.

Dien luong chuyen qua mot tiet dien
thang day dan trong mot chu ky bang khdng.

411.

Dien luong chuyen qua mot tiet dien

thang day dan trong khoang thai gian bat ky deu
bang khdng.

412.

Cong suat toa nhiet tuc thai co gia tri

cuc dai bang

<i><b>42 </b></i>

lan cong suat toa nhiet truing

binh.

<b>Cau 236. Trong cac dai luong dac trung cho</b>

ddng dien xoay chieu sau day, dai luong nao cri
dung gia tri hieu dung.

A Hieu dien the . B. Chu ky.

C. Tan se. D. Cong suat.

<b>Cau 237. Trong cac dai luong dac trung cho</b>

ddng dien xoay chieu sau day, dai luong nao
khong dung gia tri hieu dung.

A Hieu dien the . B. Cuang do

ddng dien.

C. Suat dien dong. D Cong suat.

<b>Cau 238. Phat bieu nao sau day la khdng dung.</b>

A Hieu dien the bien doi dieu hoa theo thai
gian goi la hieu dien the xoay chieu.

413.

Ddng dien co cuang do bien doi dieu

hoa theo thai gian goi la ddng dien xoay chieu.

414.

Suat dien dong bien doi dieu hoa theo

thai gian goi la suat dien dong xoay chieu.

D Cho ddng dien mot chieu va ddng dien
xoay chieu lan luot di qua cung mot dien trd thi
chung toa ra nhiet luong nhu nhau.

<b>Cau 239. Chon cau dung.</b>

A Tu dien cho ca ddng dien xoay chieu va
ddng dien mot chieu di qua.

-415.

hieu dien the giua hai ban tu bien thien

sdm pha — dei vdi ddng dien.

416.

Cuang do hieu dung cua ddng dien

xoay chieu qua tu dien ti le nghich vdi tan se
ddng dien.

D Dung Huang cua tu dien ti le nghich vdi
chu ky cua ddng dien xoay chieu.

<b>Cau 240. Chon cau dung. de tang dung khang</b>

cua tu dien phhang co chat dien mdi la khong
khi ta phai:

417.

tang tan se cua hieu dien the

dat vao hai ban tu dien.

418.

tang khoang cach giua hai
ban tu dien.

419.

Giam hieu dien the hieu dung

giua hai ban tu dien.

420.

dua them ban dien mdi vao trong ldng

<b>tu dien. Cau 241. Phat bieu nao sau day dung </b>
dei vdi cuon cam.

A Cuon cam co tac dung can trd ddng dien
xoay chieu, khong cri tac dung can trd ddng
dien mot chieu.

B. Hieu dien the giua hai dau cuon thuan
cam va cuang do ddng dien qua no co the dong
thai bang mot nua cac bien do tuang ung cua
no.

C Cam khang cua cuon cam ti le nghich vdi
chu ky cua ddng dien xoay chieu.

D. Cuang do ddng dien qua cuon cam ti le
vdi tan se ddng dien.

<b>Cau 242. ddng dien xoay chieu qua doan mach</b>

chi co cuon cam hay tu dien geng nhau d diem
nao.

421.

Deu bien thien tre pha —2 dei vdi hieu

dien the d hai doan mach.

422.

Deu co cuang do hieu dung ti le vdi
hieu dien the hieu dung d hai dau doan mach.

423.

Deu co cuang do hieu dung

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<span class='text_page_counter'>(28)</span><div class='page_container' data-page=28>

tang.

424.

Deu co cuang do hieu dung

giam khi tan se diem dien
tang.

<b>Cau 243. Phat bieu nao sau day la dung vdi</b>

mach dien xoay chieu chi chua cuon cam.

A Ddng dien sdm pha han hieu dien the mot

goc B. Ddng dien sdm pha han hieu dien the

mot goc C Ddng dien tre pha han hieu dien

the mot goc D. Ddng dien tre pha han hieu

dien the mot goc

<b>Cau 244. Phat bieu nao sau day la dung vdi</b>

mach dien xoay chieu chi chua tu dien.

A Ddng dien sdm pha han hieu dien the mot

goc

425.

Ddng dien sdm pha han hieu

dien the mot goc

426.

Ddng dien tre pha han hieu

dien the mot goc

427.

Ddng dien tre pha han hieu

dien the mot goc

<b>Cau 245. Cong thuc xac dinh dung khang cua tu</b>

dien C dei vdi tan se fla

B. ZC = — fC D. ZC = C. ZC =

2—fC " — fC

<b>Cau 14. Cong thuc xac dinh cam khang cua</b>

cuon cam L dei vdi tan se fla

A ZL = 2-fL

-2

-4

A ZC = 2—fC

1

</div>
<span class='text_page_counter'>(29)</span><div class='page_container' data-page=29>

D
.
Z

L

=

C

.

ZL =

2—fL

—fL

<b>Cau 246. Khi tan se ddng dien xoay chieu chay</b>

qua doan mach chi chua tu dien tang len 4 lan
thi dung khang cua tu dien

A. tang len 2 lan. B. tang len 4

lan.

C. giam di 2 lan. D giam di 4

lan.

<b>Cau 247. Khi tan se ddng dien xoay chieu chay</b>

qua doan mach chi chua cuon cam tang len 4
lan thi cam khang cua cuon cam

A. tang len 2 lan. B. tang len 4

lan.

C. giam di 2 lan. D. giam di 4

lan.

<b>Cau 248. Cach phat bieu nao sau day la khdng </b>

dung.

A. Trong doan mach chi chua tu dien, ddng
dien bien thien

—

sdm pha — so vdi hieu dien the.
2

428.

Trong doan mach chi chua tu dien,

ddng dien bien thien
—

cham pha — so vdi hieu dien the.

429.

Trong doan mach chi chua cuon cam,

ddng dien bien

—

thien cham pha — so vdi hieu dien the.

430.

Trong doan mach chi chua cuon cam,

hieu dien the bien

—

thien sdm pha — so vdi ddng dien trong mach.

<b>Cau 249. Dat dien ap u = U</b>0 cos(cot) vao hai

dau doan mach gom dien trd thuan R va tu dien
C mac nei tiep. Biet dien ap giua hai dau dien

trd thuan va dien ap giua hai ban tu dien cri gia
tri hieu dung bang nhau. Phat bieu nao sau day
la sai .

—
A Cuang do ddng dien qua mach tre pha so

vdi dien ap

giua hai dau doan mach.

—

B. Dien ap giua hai dau dien trd thuan sdm

pha — so vdi dien ap giua hai dau doan mach.
—

431.

Cuang do ddng dien qua mach sdm

pha — so vdi dien ap giua hai dau doan mach.

—

432.

Dien ap giua hai dau dien trd thuan tre

pha— so vdi dien ap giua hai dau doan mach.

<b>Cau 250. Cuang do hieu dung cua ddng dien </b>

chay tren doan mach RLC nei tiep khdng co

tlnh chat nao dudi day. A Khong phu thuoc vao

chu ky ddng dien.

433.

Ti le thuan vdi hieu dien the d

hai dau doan mach.

434.

Phu thuoc vao tan se diem

dien.

435.

Ti le nghich vdi tong trd cua

doan mach.

<b>Cau 251. Dat dien ap u = U-</b>N/2 cos 2—ft (U

khdng doi, tan se fthay doi duoc) vao hai dau
doan mach mac nei tiep gom dien trd thuan R,
cuon cam thuan co do tu cam L va tu dien cri

dien dung C. Khi tan se la f1 thi cam khang va

dung khang cua doan mach co gia tri lan luot la

6Q va 8 (1 Khi tan se la f2 thi he se cdng suat

cua doan mach bang 1. He thuc lien he giua f1

va f2

la

.

1

</div>
<span class='text_page_counter'>(30)</span><div class='page_container' data-page=30>

B.

f2

=f,

D.f2=^

<b>Cau 252. Dung khang cua mot doan mach RLC</b>

nei tiep co gia tri nho han cam khang. Ta lam

thay doi chi mot trong cac thdng se cua doan
mach bang cach neu sau day. Cach nao co the
lam cho hien tuong cong hudng dien xay ra.

436.

Tang dien dung cua tu dien.

437.

Tang he se tu cam cua cuon

day.

438.

Giam dien trd cua doan

mach.

439.

Giam tan se ddng dien.

<b>Cau 253. Mot dien trd thuan R mac vao mach</b>

dien xoay chieu tan se 50Hz, muen ddng dien
trong mach sdm pha han hieu

dien the giua hai dau doan mach mot goc

440.

nguai ta phai mac them vao mach mot

tu dien nei tiep vdi dien trd.

441.

nguai ta phai mac them vao mach mot

cuon cam nei tiep vdi dien trd.

C nguai ta phai thay dien trd noi tren bang
mot tu dien.

D. nguai ta phai thay dien trd noi tren bang
<b>mot cuon cam. Cau 254. Can ghep mot tu dien </b>
nei tiep vdi cac linh ken khac theo cach nao
dudi day, de co duoc doan mach xoay chieu ma

—

ddng dien tre pha — dei vdi hieu dien the hai
dau doan mach.

4

Biet tu dien trong mach nay cri dung khang
bang 20(1 A Mot cuon thuan cam co cam
khang bang 20(1

442.

Mot dien trd thuan co do ldn

bang 20(1

443.

Mot dien trd thuan co do ldn bang

40( va mot cuon thuan cam co cam khang 20(1

D Mot dien trd thuan co do ldn bang 20Q va
mot cuon thuan cam co cam khang 40(1

<b>Cau 255. Mot doan mach khdng phan nhanh co</b>

ddng dien sdm pha han hieu dien the.

444.

Trong doan mach khdng the co cuon

cam, nhung co tu dien.

445.

He se cdng suat cua doan
mach co gia tri khac khdng.

446.

Neu tang tan se ddng dien len thi do

lech pha giua ddng dien va hieu dien the giam.

447.

Neu giam tan se cua ddng dien thi

cuang do hieu dung giam.

<b>Cau 256. Doan mach RLC nei tiep dang xay ra</b>

cong hudng. Tang dan tan se cua ddng dien va
gu nguyen cac thong se khac cua mach, ket luan
nao dudi day khdng dung.

A Cuang do ddng dien giam, cam khang cua
cuong day tang, hieu dien the tren cuon day
khdng doi.

B. Cam khang cua cuon day tang, hieu dien
the tren cuon day thay doi.

3

</div>
<span class='text_page_counter'>(31)</span><div class='page_container' data-page=31>

448.

Hieu dien the tren tu giam.

449.

Hieu dien the tren dien trd giam.

<b>Cau 257. Trong mach RLC mac nei tiep, do lech</b>

pha giua ddng dien va hieu dien the giua hai dau
doan mach phu thuoc vao

450.

cuang do ddng dien hieu dung trong

mach.

451.

hieu dien the hieu dung giua hai dau

doan mach.

452.

cach

chon gec tlnh

thai gian. D

tinh chat cua
mach dien.

<b>Cau 258. Phat bieu nao sau day la khdng dung.</b>

Trong mach dien xoay chieu khdng phan nhanh
khi dien dung cua tu dien

thay doi va thoa man dieu ken a = ,— thi

V LC

453.

cuang do dao dong cung pha vdi hieu

dien the giua hai dau doan mach.

454.

cuang do ddng dien hieu dung trong

mach dat cuc dai.

455.

cong suat tieu thu truing binh trong

mach dat cuc dai. D hieu dien the hieu dung

giua hai dau tu dien dat cuc dai.

<b>Cau 260. Trong doan mach RLC, mac nei tiep</b>

dang xay ra hien tuong cong hudng. Tang dan
tan se ddng dien va giua nguyen cac thong se
cua mach, ket luan nao sau day la khdng dung.

A He se cdng suat cua doan
mach giam. B. Cuang do
hieu dung cua ddng dien

giam. C Hieu dien the hieu

dung tren tu dien tang.

456.

Hieu dien the hieu dung tren dien trd

giam.

<b>Cau 261. Phat bieu nao sau day la khdng dung..</b>

Trong mach dien xoay chieu khdng phan nhanh
khi dien dung cua tu dien

thay doi va thoa man dieu ken raL = —thi

457.

hieu dien the hieu dung giua hai dau

cuon cam dat cuc dai.

458.

hieu dien the hieu dung giua hai dau tu

dien va cuon cam bang nhau.

C tong trd cua mach dat gia tri ldn nhat.

D. hieu dien the hieu dung giua hai dau dien

<b>trd dat cuc dai. Cau 262. Phat bieu nao sau day </b>
la khdng dung. Trong mach dien xoay chieu
khdng phan nhanh ta co the tao ra hieu dien the
hieu dung giua hai dau:

A cuon cam ldn han hieu dien the hieu dung
giua hai doan mach.

B. tu dien ldn han hieu dien the hieu dung
giua hai dau doan mach.

C dien trd ldn han hieu dien the hieu dung
giua hai dau doan mach.

D. tu dien bang hieu dien the hieu dung giua
hai dau cuon cam.

<b>Cau 263. Chon cau dung. Cdng suat cua ddng</b>

dien xoay chieu tren mot doan mach RLC nei
tiep nho han tlch UI la do:

459.

mot phan dien nang tieu thu trong tu

dien.

460.

trong cuon day co ddng dien cam ung.

C hieu dien the giua hai dau doan mach va
cuang do ddng dien lech pha khdng doi vdi

nhau.

D. Cri hien tuong cong hudng dien tren doan
<b>mach. Cau 264. Cong suat cua ddng dien xoay </b>
chieu tren doan mach RLC nei tiep khdng phu
thuoc vao dai luong nao sau day.

461.

Cuang do hieu dung cua ddng dien

qua mach.

462.

Hieu dien the hieu dung giua hai

doan mach.

C Do lech pha giua ddng dien va hieu dien
the giua hai ban

tu.

D. Ti se giua dien trd thuan va tong trd cua
<b>mach. Cau 265. Chon cau dung. Tren mot doan </b>
mach xoay chieu, he se cdng suat bang 0

(cos

p

=0), khi:

463.

doan mach chi chua dien trd thuan.

464.

doan mach co dien trd bang khdng

465.

doan mach khdng co tu dien.

466.

doan mach khdng co cuon cam.

<b>Cau 266. Phat bieu nao sau day la khdng dung.</b>

</div>
<span class='text_page_counter'>(32)</span><div class='page_container' data-page=32>

467.

Cong suat cua ddng dien xoay chieu
phu thuoc vao hieu dien the hieu dung giua hai
dau doan mach.

468.

Cong suat cua ddng dien xoay chieu

phu thuoc vao ban chat cua mach dien va tan se
ddng dien trong mach.

D Cong suat cua ddng dien xoay chieu phu
thuoc vao cong suat hao phl tren duang day tai
dien. <b>Cau 37. Mach dien nao sau day co he se </b>

cdng suat ldn nhat.

A. Dien trd thuan R1 nei tiep vdi dien trd

thuan R2.B. Dien trd thuan R nei tiep vdi cuon

cam L.

C. Dien trd thuan R nei tiep vdi tu dien C. D.
Cuon cam L nei tiep vdi tu dien C.

<b>Cau 267. Mach dien nao sau day co he se cdng </b>

suat nho nhat.

469.

Dien trd thuan R1 nei tiep vdi dien trd

thuan R2.

470.

Dien trd thuan R nei tiep vdi cuon cam

L.

471.

Dien trd thuan R nei

tiep vdi tu dien C. D Cuon

cam L nei tiep vdi tu dien C.

<b>Cau 268. Mach dien xoay chieu RLC mac nei</b>

tiep dang co tinh cam khang, khi tang tan se cua
ddng dien xoay chieu thi he se cdng suat cua
mach

A. khdng thay doi. B. tang.

C giam. D. bang 1.

<b>Cau 269. Mach dien xoay chieu RLC mac nei</b>

tiep dang co tlnh dung khang, khi tang tan se
cua ddng dien xoay chieu thi he se cdng suat
cua mach:

A. khdng thay doi.

B. tang.

C. giam.
D. bang 0.

<b>Cau 270. Dei vdi ddng dien xoay chieu cach</b>

phat bieu nao sau day la dung.

A Trong cong nghiep, co the dung ddng dien
xoay chieu de ma dien.

472.

Dien luong chuyen qua mot tiet dien
thang day dan trong mot chu ky bang khdng.

473.

Dien luong chuyen qua mot tiet dien

</div>
<span class='text_page_counter'>(33)</span><div class='page_container' data-page=33>

1

D. Cong suat toa nhiet tuc thai co gia tri cuc

dai bang

<i><b>42 </b></i>

lan cong suat toa nhiet truing

binh.

<b>Cau 271. Khang dinh nao sau day la dung. Khi</b>

hieu dien the

—

giua hai dau doan mach RLC mac nei tiep sdm
pha — dei vdi

ddng dien trong mach thi

A tan se cua ddng dien trong mach nho han
gia tri can xay ra hien tuong cong hudng.

B. tong trd cua mach bang hai lan thanh phan
dien trd thuan R cua mach.

C hieu se giua cam khang va dung khang
bang dien trd thuan cua mach.

D. hieu dien the giua hai dau dien trd sdm
pha %/4 so vdi hieu dien the giua hai dau tu
<b>dien. Cau 272. Phat bieu nao sau day la khdng </b>
dung.

A Cong suat cua ddng dien xoay chieu phu
thuoc vao cuang do ddng dien hieu dung trong
mach.

474.

Cong suat cua ddng dien xoay chieu

phu thuoc vao hieu dien the hieu dung giua hai
dau doan mach.

475.

Cong suat cua ddng dien xoay chieu

phu thuoc vao ban chat cua mach dien va tan se
ddng dien trong mach.

D Cong suat hao phl tren duang day tai dien
khdng phu thuoc vao chieu dai cua duang day
tai dien. <b>Cau 273. Phat bieu nao sau day la dung.</b>

A Ddng dien xoay chieu mot pha chi co the
do may phat dien xoay chieu mot pha tao ra

476.

Suat dien dong cua may phat dien
xoay chieu ti le vdi se vdng quay trong mot
phut cua rd to.

477.

Ddng dien do may phat dien xoay

chieu tao ra ludn co tan se bang tan se quay cua
rd to.

478.

Chi co ddng dien xoay chieu ba pha

mdi tao ra tu truang quay.

<b>Cau 274. Doan mach dien xoay chieu gom dien</b>

trd thuan R, cuon day thuan cam L va tu dien C

mac nei tiep. Kl hieu UR , uL uC tuang ung la

hieu dien the tuc thai d hai dau cac phan tu R, L
va C. Quan he ve pha cua cac hieu dien the nay
la

—

A uR tre pha — so vdi uC . B. uC tre pha %

so vdi uL .

—

—

C. uL sdm pha — so vdi uC. D. UR sdm pha

— so vdi uL .

<b>Cau 275. Ddng dien xoay chieu trong doan</b>

mach chi co dien trd thuan

A cung tan se vdi hieu dien the d hai dau
doan mach va cri pha ban dau ludn bang 0.

B. cung tan se va cung pha vdi hieu dien the

d hai dau doan
mach.

—

C. luon lech pha — so vdi hieu dien the d hai
dau doan
2

mach.

D. cri gia tri hieu dung ti le thuan vdi dien trd
cua mach.

<b>Cau 276. Dat vao hai dau doan mach RLC </b>

khdng phan

nhanh mot hieu dien the xoay chieu u=U0

sinrat. Ki hieu UR ,

UL , UC tuang ung la hieu dien the hieu dung d

hai dau dien trd thuan R, cuon day thuan cam L
va tu dien C. Neu

UR = -U2L = UC thi ddng dien qua doan mach

—

A tre pha — so vdi hieu dien the d hai dau
doan mach.

B. tre pha so vdi hieu dien the dhai dau
doan mach.

479.

sdm pha — so vdi hieu dien the d hai

dau doan mach.
2

—

480.

sdm pha — so vdi hieu dien the d hai

dau doan mach.
4

<b>Cau 277. Dat hieu dien the u = U</b>0sinat (U0

</div>
<span class='text_page_counter'>(34)</span><div class='page_container' data-page=34>

481.

Cuang do hieu dung cua ddng dien
trong mach dat gia tri ldn nhat.

482.

Hieu dien the tuc thai d hai dau doan

mach cung pha vdi hieu dien the tuc thai d hai
dau dien trd R.

483.

Cam khang va dung khang

cua doan mach bang nhau.

D Hieu dien the hieu dung d hai dau dien trd
R nho han hieu dien the hieu dung d hai dau
doan mach. <b>Cau 278. Trong mot doan mach </b>

dien xoay chieu khdng phan

nhanh, cuang do ddng dien sdm pha p ^ 0 < p <

—j_{so vdi}

hieu dien the d hai dau doan mach. Doan mach
do A gom dien trd thuan va tu dien.

484.

chi co cuon cam.

485.

gom cuon thuan cam va tu

dien.

486.

gom dien trd thuan va cuon

thuan cam .

<b>Cau 279. Dat mot hieu dien the xoay chieu co</b>

gia tri hieu dung khdng doi vao hai dau doan
mach RLC khdng phan nhanh. cuon day thuan

cam. Hieu dien the giua hai dau

A doan mach ludn cung pha vdi ddng dien
trong mach.

487.

cuon day ludn nguoc pha vdi hieu dien
the giua hai dau tu dien.

488.

cuon day ludn vudng pha vdi hieu dien

the giua hai dau tu dien.

489.

tu dien ludn cung pha vdi

ddng dien trong mach.

<b>Cau 280. Khi dat vao hai dau doan mach gom</b>

cuon day thuan cam mac nei tiep vdi dien trd
thuan mot hieu dien the xoay

chieu thi cam khang cua cuon day bang

<i><b>43</b></i>

lan gia tri cua dien trd thuan. Pha cua ddng dien
trong doan mach so vdi pha hieu dien the giua
hai dau doan mach la

—

_{B. nhanh han goc}

—

C. nhanh han goc 6 D. cham han goc 6 .

<b>Cau 281. Dat mot hieu dien the xoay chieu co</b>

tan se thay doi duoc vao hai dau doan mach
RLC khdng phan nhanh. Khi tan

—

A. cham han gic

3
3

</div>
<span class='text_page_counter'>(35)</span><div class='page_container' data-page=35>

1

<i>se ddng dien trong mach ldn han gia tri ~ ~f=</i>
2—\/
LC

490.

hieu dien the hieu dung giua hai dau

dien trd bang hieu dien the hieu dung giua hai
dau doan mach.

491.

hieu dien the hieu dung giua hai dau

cuon day nho han hieu dien the hieu dung giua
hai ban tu dien.

C ddng dien chay trong doan mach cham
pha so vdi hieu dien the giua hai dau doan
mach.

D. hieu dien the hieu dung giua hai dau dien
trd ldn han hieu dien the hieu dung giua hai dau
<b>doan Cau 282. Mot doan mach dien xoay chieu</b>
gom dien trd thuan, cuon cam thuan va tu dien
mac nei tiep. Biet cam khang gap ddi dung
khang. Dung von ke xoay chieu (dien trd rat
ldn) do dien ap giua hai dau tu dien va dien ap
giua hai dau dien trd thi se chi cua vdn ke la nhu
nhau. Do lech pha cua dien ap giua hai dau
doan mach so vdi cuang do ddng dien trong
doan mach la

—

A-. B. -. C. -. D.

--4 , 6 3 3

<b>Cau 283. Neu trong mot doan mach dien xoay </b>

chieu khdng

phan nhanh, cuang do ddng dien tre pha so vdi
hieu dien the

giua hai dau doan mach, thi doan mach nay
gom

492.

tu dien va bien trd.

493.

cuon day thuan cam va tu dien vdi

cam khang nho han dung khang.
C. dien trd

thuan va tu
dien.

D dien trd
thuan va cuon
cam.

<b>Cau 284. Trong doan mach dien xoay chieu</b>

gom dien trd thuan, cuon cam thuan va tu dien
mac nei tiep thi

494.

dien ap giua hai dau tu dien nguoc pha

vdi dien ap giua hai dau doan mach.

495.

dien ap giua hai dau cuon cam cung

pha vdi dien ap giua hai dau tu dien.

C dien ap giua hai dau tu dien tre pha so vdi
dien ap giua hai dau doan mach.

D. dien ap giua hai dau cuon cam tre pha so

vdi dien ap giua

hai dau doan mach.

<b>Cau 285. Dat dien ap xoay chieu u = U</b>ocos2—

ft, cri U0 khong doi va f thay doi duoc vao hai

dau doan mach co R, L, C mac nei tiep. Khi f =

10 thi trong doan mach co cong hudng dien. Gia

tri cua f la
2—

<b>Cau 286. Dat dien ap u = U</b>ocos(at) vao hai dau

doan mach mac nei tiep gom dien trd thuan R,
tu dien va cuon cam thuan co do tu cam L thay
doi duoc. Biet dung khang cua tu dien bang
R\/3. Dieu chlnh L de dien ap hieu dung giua
hai dau cuon cam dat cuc dai, khi do:

—

A dien ap giua hai dau tu dien lech pha — so
vdi dien ap
6
giua hai dau doan mach.

B. dien ap giua hai dau cuon cam lech pha —
so vdi dien ap
6
giua hai dau doan mach.

C. trong mach ci cong hudng dien.

D dien ap giua hai dau dien trd lech pha so vdi
dien ap

6

giua hai dau doan mach.

<b>Cau 287. Dat dien ap u=Ucosat vao hai dau</b>

cuon cam thuan cri do tu cam L thi cuang do
dong dien qua cuon cam la

A • U0

f —j

„ . U0

f —

A i

=

—- cos

I a

t

+

—

I

B. i

=

---^

cos

I a

t

+

—

—

</div>
<span class='text_page_counter'>(36)</span><div class='page_container' data-page=36>

a

L

I

2

J

a

W2

I

2

C i

=

-

U

_^cos

[ a

_t

a

_L

V

A2

<i><b>U</b></i>

-

_—

=

_0.

C

.

<i><b>u</b></i>

- i=

_0.

U I

<b>Cau 289. Doan mach dien xoay chieu khdng</b>

phan nhanh gom cuon day co do tu cam L, dien
trd thuan R va tu dien co dien

dung C. Khi ddng dien co tan se goc

mach thi he se cdng suat cua doan mach nay
A phu thuoc dien trd thuan cua doan mach.
B. bang 0. C. phu thuoc tong trd cua doan

mach. D. bang 1.

<b>Cau 290. Cho doan mach gom dien trd thuan R</b>

nei tiep vdi tu

dien co dien dung C. Khi ddng dien xoay chieu
co tan se goc a

chay
qua
thi

tong trd cua doan mach la

A

<b>Cau 291. Doan mach dien xoay chieu gom bien</b>

trd R, cuon day thuan cam co do tu cam L va tu
dien co dien dung C mac nei tiep. Biet hieu dien
the hieu dung hai dau doan mach la U, cam

khang ZL dung khang ZC (vdi ZC + ZL) va tan

se ddng dien trong mach khdng doi. Thay doi R
den gia tri R thi cong suat tieu thu cua doan

mach dat gia tri cuc dai Pm khi do

A R0 = ZL+ZC.

R

0

C.

P

m

<b>Cau 292. Dat dien ap u=U</b>0cos(at) ci a thay doi

duoc vao hai dau doan mach gom cuon cam
thuan co do tu cam L, dien trd

U

0

f

-°°7

=cos

I

D. i =

B. <i><b>— + — = </b></i>

<i><b>42</b></i>

JU J_

U

2

I

<b>Cau</b>

= 1.

chay qua doan

1

C. <i><b>< J</b><b>R</b><b>2 </b></i>

+(a

C

)2

.

D. <i><b>< J</b><b>R</b><b>2 </b></i>

-(a

C

)B. P_m

Z2

</div>
<span class='text_page_counter'>(37)</span><div class='page_container' data-page=37>

1

thuan R va tu dien co dien dung C mac nei tiep.
Khi

a <

496.

dien ap hieu dung giua hai dau dien trd

thuan R bang dien ap hieu dung giua hai dau
doan mach.

497.

dien ap hieu dung giua hai dau dien trd

thuan R nho han dien ap hieu dung giua hai dau
doan mach.

C cuang do ddng dien trong doan mach tre
pha so vdi dien ap giua hai dau doan mach.

D. cuang do ddng dien trong doan mach
cung pha vdi dien ap giua hai dau doan mach.

<b>Cau 294. Dat dien ap xoay chieu u=U cosrat cri</b>

U khdng doi

0
0

va ra thay doi duoc vao hai dau doan mach cri
R L, C mac nei tiep. Thay doi ra thi cuang do
ddng dien hieu dung trong mach khi ra = ra
bang cuang do ddng dien hieu dung trong mach
khi

12

V

LC

ra=OK He thuc dung la

AA1A2

_{= VLC}

C. a1a2 =

<b>Cau 295: Trong doan mach xoay chieu khdng</b>

phan nhanh, cuang do ddng dien nhanh pha so

vdi hieu dien the. Dieu khang dinh nao sau day
dung:

498.

Doan mach chi co cuon cam

L

499.

Doan mach gom R va C

500.

Doan mach gom L va C

501.

Doan mach gom R va L

<b>Cau 296: Tac dung cua cuon cam dei vdi ddng</b>

dien xoay chieu la

A gay cam khang nho neu tan se ddng dien
ldn

502.

gay cam khang ldn neu tan se
ddng dien ldn

503.

ngan can hoan toan ddng

dien xoay chieu

504.

chi cho phep ddng dien di

qua theo mot chieu

<b>Cau 297: Tac dung cua tu dien dei vdi ddng </b>

dien xoay chieu la A gay dung khang ldn

neu tan se ddng dien nho

505.

gay dung khang ldn neu tan

se ddng dien ldn

506.

ngan can hoan toan ddng

dien xoay chieu

507.

chi cho phep ddng dien di

qua theo mot chieu

<b>Cau 298: Cuang do ddng dien ludn ludn tre pha</b>

so vdi hieu dien the d hai dau doan mach khi

508.

doan mach chi co cuon cam

C.

509.

doan mach co R va L mac
nei tiep.

510.

doan mach co L va C mac

nei tiep.

511.

doan mach co R va C mac

nei tiep.

<b>Cau 299: Trong doan mach xoay chieu RLC nei</b>

tiep, cuang do ddng dien chay qua mach sdm

pha han hieu dien the d hai dau mach khi

A Z=R B. ZL > ZC C ZL < ZC D. ZL=R

<b>Cau 300: Trong doan mach xoay chieu RLC nei</b>

tiep, hieu dien the d hai dau dien trd thuan R
cung pha vdi hieu dien the d hai dau mach khi

A ZL=ZC B. ZL > ZC C. ZL < ZC D.

ZL<b>=R Cau 301: Vdi mot cuon cam co do tu </b>

u = U0 cos(at + —) va i = I0 cos(at + p). t va p cri gia

1
thi

2

B. a, +a2 = .— 2

2

D. a, +a2 = .— 12

V

LC

</div>
<span class='text_page_counter'>(38)</span><div class='page_container' data-page=38>

cam L va mot tu dien co dien dung C. Tan se
ddng dien xoay chieu tang thi:

512.

dung khang ZC tang va cam

khang ZL giam.

513.

dung khang ZC va cam khang

ZL deu tang.

514.

cam khang ZL tang bao nhieu, dung

khang ZC giam dung bay nhieu.

D dung khang ZC giam va cam khang ZL

tang. <b>Cau 302: Trong doan mach xoay chieu co </b>

cac phan tu mac nei tiep, neu cuang do ddng
dien i vudng pha vdi hieu dien the u thi trong
mach:

A khdng co dien trd thuan R

515.

khong ci cuon cam L.

516.

khong ci tu dien C.

517.

chi co cuon cam L.

<b>Cau 303. Dat dien ap u=Ucosat vao hai dau</b>

cuon cam thuan co do tu cam L. Tai thai diem
dien ap giua hai dau cuon cam co do ldn cuc dai
thi cuang do ddng dien qua cuon cam bang

A U_°

V

2aL

U0

D 0.

aL

<b>Cau 304. Dat vao hai dau doan mach chi co dien</b>

trd thuan R mot dien ap xoay chieu co bieu thuc

u = U0 cos(at) thi cuang do ddng dien chay qua

dien trd co bieu thuc i = I-\/2cos(at + , trong do I

<i>va cpj duoc xac dinh bdicac he thuc tuang ung</i>

la

<b>A T </b>U₀

—

R
1₂

CT

U0

—

C

.

I

=-/=

0

-

; P_i

= -



-V2R 2

<b>Cau 305. Hieu dien the va cuang do ddng dien</b>

trong doan mach chi co cuon day thuan
cam co dang

—
6

tri nao sau day?

A I0 = U0La; p = — rad

3

B. I0 = f°-;p = - — rad

C I0 =XN;p = -Arad

La

L
a —

D. I0 =

---; p = —
rad

0U₀6 ^

<b>Cau 306. Trong doan mach dien xoay chieu chi</b>

co cuon day thuan cam co do tu cam L, dien ap

giua hai dau cuon day ci bieu thuc u = U0

cos(at) thi cuang do dien chay qua doan

B. U₀

2aL

C.

B. I = ; pi = 0.

U0

2R

D.I = -U_{-; P}_i_{= 0. V2R}

—

2
—
3

U0

La

</div>
<span class='text_page_counter'>(39)</span><div class='page_container' data-page=39>

1

mach co bieu thuc i = I

-V

2 cos(at + pi), trong

do I va pi duoc xac dinh bdi cac he thuc

A I = U,aL ;p; = 0. B. I = pi = --.

aL 2

C. I ^-TU_{^; p}

i = -2. D. I

=

= 2.

V2

a

L 2 V2

a

L
2

<b>Cau 307. Hieu dien the va cuang do ddng dien</b>

trong doan mach chi co tu dien co dang u = U0

cos ^at + —_{j va i = I}

0cos(at + a). Io <i>va a cri gia</i>

tri nao sau day:
3—

C

a
—

B.

I

0=

U

0

C

a; a = -

2 rad

3—

C

I

0=

U

0

C

a; a = —

rad

4

U

D. I0 =—-; a = — rad₀

Ca 2

<b>Cau 308. Mot cuon day co dien trd thuan R, he</b>

se tu cam L mac vao hieu dien the xoay chieu u

= U0 cos (at). Cuang

do hieu dung cua ddng dien qua cuon day duoc
xac dinh bring he thuc nao?

L

a

--;_tan

p =

-R

C

a

R2

+|

_L

a+— |

_{; tanp = C}

.a

---j

2

La---R2

+

_{| L}

a-— I

_;

_{tanp =}

---

C

.a J

R

<b>Cau 313. Cho doan mach gom cuon day thuan </b>

cam L ghep nei tiep vdi tu dien C . Tan se goc
cua hieu dien the dat vao 2 dau mach la a . Dieu
nao sau day la sai ? A Mach khdng tieu thu
cdng suat

518.

Tong trd cua doan mach : Z = La——

Ca
1

2

519.---

T
ong trd cua doan mach Z = La

neu LCa > 1

Ca

D He se cdng suat cua doan mach bang 1

<b>Cau 314. Chon cau dung. Mot doan mach gom</b>

mot dien trd thuan R nei tiep vdi mot tu dien co
dien dung C. Dat vao hai dau doan mach mot

hieu dien the xoay chieu u=U0cosat. Cuang do

hieu dung cua ddng dien qua mach duoc xac
dinh bang he thuc sau day:

B. I

V

RW

LJ

R

+ a

L

Ca
U

D. I

=

U

.V

R

2₊

L

a

V

R

2

2_{+ a}2

_L

2

+

(L

a--L)

2 C

a

<b>Cau 309. Chon cau</b>

sai trong cac cau
sau:Mot doan
mach co ba thanh
phan R, L, C mac
nei tiep nhau, mac

vao hieu dien the

xoay chieu

u

=

U

0

cos

(a

t

) khi cri
cong hudng thi:

A

LC

a2₌

₁

C.

i

=

_—

co

s

a

t

va

D
.

U

R
=

U

c

R

_

r
c

<b>Cau 310.</b>

Trong mach
dien xoay chieu
khdng phanh
nhanh RLC do
lech pha giua hieu
dien the giua hai
dau toan mach va

—

cuang do ddng
dien trong mach la:

p = pu - pi =

-3

thi:

520.

Mach co

tlnh dung
khang.

521.

Mach co
tlnh cam khang.

522.

Mach co

tlnh trd khang.

523.

Mach

cong hudng
dien

<b>Cau 312. Cuang do</b>

ddng dien di qua
mach RLC mric tei
tiep cri bieu thuc: i

= Io cos rat . Tong

trd cua doan mach
va do lech pha cp
cri bieu thuc tuang
ung nao sau day:

L

a -

C

a
2

A. I C I

=

U

U0 _U

U

A I0 = —-; a = — rad

4

—

1

C

a

B. Z =

R2

+|

_L

a+-C

a

-

L

a

R

C. Z =

D Z=

R

</div>
<span class='text_page_counter'>(40)</span><div class='page_container' data-page=40>

R2

+I

_L

a

—

— |

; tanp
=

-C

.a

y

A. I =

<i><b>42</b></i>
<i><b>.</b></i>

2 2

a

C

)

^2(R2

2

+a

2_C2₎

<b>Cau 315. Chon cau</b>

dung. Mot doan
mach gom mot
cuon cam thuan L
nei tiep vdi mot tu

dien co dien dung
C. Dat vao hai dau
doan mach mot
hieu dien the xoay

chieu u=U0cosat.

Cuang do hieu
dung cua ddng
dien qua mach
duoc xac dinh bang
he thuc sau day:

A I =

1

C I =

<i><b>4</b></i>
<i><b>2</b></i>
<i><b>^</b></i>

(
a
L

-a
C

)

a

C

<b>Cau 316. Trong cac</b>

bieu thuc cua gia tri
hieu dung cua
ddng dien xoay
chieu sau,hay chon
cong thuc sai :

B.
U
= 2

<i>U_L</i>

<i><b>4</b></i>

<i><b>2</b></i>

c. I

V

2

<i><b>42'</b></i>

<b>Cau 317. Trong</b>

truang hop nao khi

tang dan dien dung
C cua tu dien trong
mach R, L, C mac
nei tiep, cuang do
ddng dien hieu
dung tang roi lai
giam ?

B

.I

T. 2 1

R +

2 2 2

R

+a

C

U0
D.I

R2

-a

2CC.

I

U

B. I =

2 2 2 2

a

L

+a

C

<i><b>42,</b></i>

|

a

2_L2

+

2
2

a

V

2 |

a

L

-

—|

E

<i><b>4</b></i>

<i><b>2</b></i>

I0

fo

</div>
<span class='text_page_counter'>(41)</span><div class='page_container' data-page=41>

A ZL > Zc B. ZL < Zc

C. ZL=Zc=R D. ZL=Zc < R

<b>Cau 319. Trong mach dien xoay chieu gom</b>

RLC mac nei tiep

thi:

A.Do lech pha cua uL va u la

2

B.Pha cua uL nhanh han pha cua uR la

C.Pha cua uc nhanh han pha cua i la

<b>Cau 336. Ki hieu U la dien ap hieu dung giua 2</b>

dau doan mach chi chua tu dien va C la dien
dung cua tu dien thi cong suat tieu thu tren doan
mach do la:

A. CU2 , , , 4 _ r

<b>Cau 237. Mot cuon day mac nei tiep vdi 1 tu</b>

dien, roi mac vao dien ap xoay chieu gia tri hieu
dung bang U va tan se bang 50Hz. Dung von
ke do duoc dien ap hieu dung tren cuon day
bang U-v/3 va tren tu dien bang 2U. He se cdng
suat cua doan mach do bang:

D. Pha cua uL

nhanh han pha

cua uR la

<b>Cau 320. Mach</b>

dien R1 , L1, C1 cri

tan se cong hudng

f1. Mach dien R2 ,

L2 , C2 ci tan se

cong hudng f2. Biet

f2 = f1. Mac nei tiep

hai mach do vdi
nhau thi tan se
cong hudng se la f
Tan se f lien he vdi

tan se f1 theo he

thuc:

A f= 2f1. B. f

= 1,5 f1. C. f=3f1.

D f = f1 <b>Cau 321. </b>

Chon cau tra lai sai.

Trong mach dien
xoay chieu khong
phan nhanh RLC

vdi cos p =1
khi va chi khi:

V

2

C

<b>. — D. Cau 338. </b>

Mach dien RLC

mac nei tiep, dat

vao mach mot dien

ap xoay chieu co

tan se f thi dien ap

UR=UL=2

2
2
1_U

c. Dien

2

ap hieu dung hai
dau mach la

A U=UR

C. U=UR V

2

—
—

—
2
—

2
CUCUB.

C 0

1A B. ^

4 2

B. U = 2UR

U

</div>
<span class='text_page_counter'>(42)</span><div class='page_container' data-page=42>

B.
P
=
U.I
L.a

Z

C. — = 1

D.

U * U

R

R

-

<b>Cau 322. Goi P la</b>

cong suat tai di tren
duang day dan, U
la hieu dien the d
dau duang day, R
la dien trd day dan.
Cdng suat hao phl
tren duang day do
tac dung nhiet la:

R
P
R
2
2
2

R
2
P
D
.
A
P
=
U2

<b>Cau 323. Xet ve tac</b>

dung toa nhiet
trong mot thai gian
dai thi ddng dien
xoay chieu hinh sin

i = I

0

cos(at +

p

i

)

tuang duang

vdi mot ddng dien
khdng doi co
cuang do bang

C. D. ~ 2

2

<b>Cau 339. Cho</b>

mach dien xoay
chieu khdng phan
nhanh RLC . Dat
vao hai dau mach
dien mot hieu dien
the xoay chieu co
bieu thuc u =

U0cos (at). Dieu

ken de cri cong
hudng dien trong
mach la:

A LC=<i><b>R</b>a</i>2

<i>2</i> _{B. LCa}2₌

R

CLCco2_=l

D. LC = coCau
340. Cho mach
dien xoay »i q

Rj <b>C2 </b>chieu nhu

hinh ve. Nguon

dien 2

A_{'' I'}<b>_M</b>_{J I}

*B _{xoay chieu dat}

vao

AM-B.
*L

R1

R₂C₁+C₂

D. R2

<b>Cau 324. Khi ci</b>

mot ddng dien
xoay chieu hinh sin

i = I0 cos(at) chay

qua mot dien trd

thuan R trong thai

gian t

kha ldn (t » —) thi
n
h
ie
t
l
u
o
n
g
Q
t
o
a
r
a
tr
e
n
d
ie
n
tr
d
R
a

2_Rt_{D.Q = 0,5I}2_Rt.

trong thai gian do

la AQ = I0R2t.

C. Q = I2_Rt.

<b>Cau 325. Dat mot</b>

hieu dien the xoay
chieu co gia tri hieu
dung U khdng doi
nhung tan se f thay
doi vao hai dau
mot doan mach
RLC nei tiep.
Cdng suat toa nhiet
tren dien trd

A ti le vdi U.
B. ti le vdi L.
C. ti levdi R.

D phuthuoc £

<b>Cau 341. Dat vao</b>

hai dau doan mach
RLC mac nei tiep
dien ap xoay

chieu . Dien ap

giua hai dau doan
mach sdm pha hay
tre pha han cuang
do ddng dien phu
thuoc vao:

A. ra,L,C B.
RL,C C. raRL,C
<b>Dra,R Cau 342. </b>
Mach xoay chieu
gom R, L, C nei

tiep co U0L=2U0C.

So vdi ddng dien,
hieu dien the giua
hai dau doan mach
se

524.

sdm pha han.

B. tre pha han..
C. cung pha.
D. ci pha phu
thuoc vao R.

<b>Cau 343. O hai dau</b>

mot dien trd R co
dat mot hieu dien

the xoay chieu uAB

va mot hieu dien

the khdng doi UAB.

De ddng dien xoay
chieu co the qua
dien trd va chan
khdng cho ddng
dien khdng doi qua
no ta phai

A M2c nei tiep
vdi dien trd mot
tu dien C.

525.

M2c song

song vdi dien
trd mot tu dien
C.

526.

Mac nei

tiep vdi dien trd
mot cuon thuan
cam L

1
A. C.a =

RUB. AP=

A AP =

P2

RPC

2_2UA

V

_2i
0

B. 2Io.

A *L

C. hai
dau
MN.
Hoi
C2
Ci
C2
C2

</div>
<span class='text_page_counter'>(43)</span><div class='page_container' data-page=43>

B. L =

C. L = 0

2

2

R

<i><b>R</b></i>

<i><b>_L</b></i>

A Ri + R2=Ci+C2

C. Ci+C2=

<b>Cau 346. Doan mach xoay chieu gom cuon day</b>

thuan cam L mac nei tiep vdi dien trd R.Hieu
dien the hieu dung hai dau mach on dinh la U
va tan se ddng dien la f. Khi cho R bien thien ta
nhan thay ci hai gia tri cua R ma la cho do la
pha giua u va

ddng dien i la pL va p2 thoa man dieu kien pL

+p2 =

3

. Do

R

_^

tu cam L cua cuon day duoc xac dinh bdi:

•./R

1

R

2 A.

L

= V

1

2—f

<b>Cau 347. Trong mot doan mach xoay chieu mac</b>

nei tiep, gom dien trd R, mot cuon day thuan

cam va mot tu dien C, dien ap hai dau doan
mach sdm pha han cuang do ddng dien mot goc

—

(0 < p < —). Ket luan nao

sau day ludn dung? A Zc+ZL > R

C.

^R

2

p

2

_{- Z}

L

<i><b>_{< J R}</b></i>

2

_{- Z;}

_D

_^R

2

_{- Z}

L

> V

R

2

_{- Z}

<b>Cau 348. Hai cuon day R</b>L, L1va R2, L2 mac nei

tiep nhau va dat vao mot hieu dien the xoay

chieu co gia tri: hieu dung U. Goi UL va U2 la

hieu dien the hieu dung tuang ung giua hai cuon

RL, LL va R2, L2 Dieu kien de U=U1+U2 :

R₂R₁

A <i><b>L</b></i>

<i><b>_L</b></i>

=

_L_{2_}

R₁R₂

C. = R1R2 D. Li + L2 = Ri

+ R2

<b>Cau 349. Mach dien nei tiep gom R, cuon day</b>

thuan cam, do tu cam L thay doi va tu dien C.
Hieu dien the hai dau la U on dinh, tan se f Khi

UL cuc dai, cam khang ZL cri gia tri:

A Bang Zc B. ZL=R+Zc

R

2
2

_{+ Z}

2

_R

<b>Cau 350. Mach dien R</b>1, L1, C1 ci tan se cong

hudng f1. Mach dien R2, L2, C2 ci tan se cong

hudng f2. Biet f2= f1, Khi mac nei tiep hai mach

do vdi nhau thi tan se cong hudng se la f. Tan se

f lien he vdi tan se f1 theo he thuc.

1

2

D. L =

C

a

C

a

1

B. D.

2

R2

C

2

C

i

C

2

<b>Cau 345. Cho mach dien nhu hinh ve. Dieu kien de U</b>AB = UAM + UMB 1

B.

L =

la

2—f

2—

f

2

—f

C. L =

B. Zc+ZL < R

B.

R

2

_{+ Z}

_{C Z}

</div>
<span class='text_page_counter'>(44)</span><div class='page_container' data-page=44>

A f= 3f B. f= 2f C. f= i,5f D. f= f <b>Cau </b>
<b>351. Mach dien nei tiep gom R, cuon day thuan </b>

cam va tu dien co dien dung cua tu C thay doi .
Hieu dien the hai dau la U on dinh, tan se f. Khi

UL cuc dai, dung khang ZC ci gia tri:

R

2

_{+ Z}

L
A.Z_C

Z_L

R

2

_{+ Z}

L

c

R

2

+ Z

_L

<b>Cau 352. Cho mach dien gom mot dien trd</b>

thuan R, mot cuon day co do tu cam L, dien trd
r, tu dien co dien dung co the bien doi duoc.

Dieu chinh dien dung C sao cho Uc dat gia tri

cuc dai. Gia tri cua Zc luc do la:

2
2

L
2
2 ₂

ZL

( R + r

<i><b>f + Z</b></i>

D. Zc=ZL

<b>Cau 353. Cho doan mach R, L, C nei tiep vdi L</b>

co the thay doi duoc.Trong do R va C xac dinh.
Mach dien duoc dat dudi hieu

dien the u=U>/2 cos(at). Vdi U khdng doi va a
cho trudc.

Khi hieu dien the hieu dung giua hai dau cuon
cam cuc dai. Gia tri cua L xac dinh bang bieu
thuc nao sau day:

2₊

A L=R2_{+ C. L=CR}1

2₊

2C

a

2

C

a

2 <b>Cau 354. Mach</b>

dien nei tiep gom R, cuon day thuan cam va tu
dien co dien dung C . Hieu dien the hai dau la U
on dinh, tan se ddng dien fthay doi duoc. Khi

Uc cuc dai, gia tri cua f la: Af

=

1 R

2

+(Z

L

-Zc)

2



Bf

=

Z L

-

Zc

—

2— Z

R

C.

f

=

2

—V

LC

D.

f

=

- - -\=

2—V

LC

<b>Cau 355. Dien ap xoay chieu dat vao hai dau</b>

doan mach RLC mac nei tiep cri tan se f Biet

cuang do ddng dien sdm pha

so vdi dien ap. Gia tri cua dien dung C tlnh theo
do tu cam L, dien trd R va tan se f la

A

C

=

— 1 _B.

_C

_2—

f(2—fL + R)

D.

Z

c =

C. ZC =

R

(

R

+

r

₎

L

C. Zc =

Z 2
L

1B. L=2CR2₊

C

a

1

2
2

C

a

1

D L=CR2

—

</div>
<span class='text_page_counter'>(45)</span><div class='page_container' data-page=45>

C. C =

—f(2—fL
<b>-R) 2—f(2—L--R) Cau 356. Mach dien nei tiep</b>
gom R, cuon day thuan cam va tu dien co dien
dung C. Hieu dien the hai dau la U on dinh, tan

se ddng dien fthay doi duoc. Khi ULcuc dai, gia

tri cua f la:

doan mach, ta thay cuang do ddng dien qua
mach cham pha —3 so vdi hieu dien the tren
doan RL. De trong mach co cong hudng thi

dung khang Zc cua tu phai co gia tri bang

B. R C R

V

3 D. 3R

A

f
1
2
B
.

Zl_^R <b>Cau 363. Dat</b>

vao mot doan
mach RLC
khdng phan
nhanh mot hieu

dien the

u

=

U

0

sin

(a

t)

V

thi cuang do

ddng dien

1 Rc

2_{+ Zc. f = 2}

—

V

LC

2

2

B.R_o= Z_C
-Z_L

D. R

ZL

-

CR_{o = |}Z_L-Z_C

<b>Cau 358. Dat vao</b>

mot doan mach
RLC nei tiep dien

ap u = U0cos(at)V

thi cuang do ddng

dien trong mach co
bieu thuc

i

=

I0cos

|

a

t —

|

A.

Quan he giua cac
trd khang trong

3

B.ZcZ L_R

D Z

c

-

ZL

=

1
R
<b>C</b>
<b>a</b>
<b>u</b>
<b>3</b>
<b>5</b>
<b>9</b>
<b>.</b>
M
o

t
d
o
a
n
m
a
c
h
d
i
e
n
x
o
a
y
c
h
i
e
u
c
o
d
a
n
g
n
h

u
h
i
n
h
v
e
.
B
i
e
t
h
i
e
u
d
i
e
n
t
h
e
u

E RL

B

va u lech pha nhau

900_{. Tim}

EB

mei lien he giua R,
r, L, C.

A

R=C.r.L

B. r = C. R..L

C L=C.R.r

D. C=LRr

<b>Cau 360. Dat dien</b>

ap xoay chieu u =

1

1
D. C=
A.

R

3^3

D.f

A

Ro

=

(ZL

-

Zc)2— Zc ^ <b>Cau 357. Chon cau tra lai dung.</b>

mach thoa man

A

.

ZL-ZC



<i><b>-43</b></i>

1

<i><b>" 4</b></i>

<i><b>43</b></i>

j_

<i><b>43</b></i>

R
R
C.
AE
A

</div>
<span class='text_page_counter'>(46)</span><div class='page_container' data-page=46>

U0cos(at) ci U0

khong doi va a
thay doi duoc vao
hai dau doan mach
co R, L, C mac nei
tiep. Thay doi a thi
cuang do ddng
dien hieu dung
trong mach khi a =

a1 bang cuang do

ddng dien hieu

dung trong mach

khi a = a2. He thuc

dung la :

2 B.a.a= 1

B. aL.a2

=

D.

a

1

.a

2

=

LC

2

a_ia₂

B.
ao2=a

L.a
2

D.

ao=aL+a2

<b>Cau 362. Cho doan</b>

mach RLC nei
tiep, gia tri cua R
da biet, L ce dinh.
Dat mot hieu dien
the xoay chieu on
dinh vao hai dau
trong mach co bieu

thuci = I0 cos(at

-j)V. Quan he giua
cac trd khang trong
doan mach nay
thoa man:
Z_C
Z_L

<i><b>=</b></i>

<i><b>4</b></i>

<i><b>3</b></i>

B

.

1

ZC

_^

L

<i><b>_{= 43}</b></i>

R

Z_LZ_CD.

R

V

3

R

<i><b>43</b></i>

<b>Cau 364. Cho</b>

mach dien xoay
chieu RLC nei tiep.
Dat vao hai dau
doan mach mot
dien ap xoay chieu
on dinh co bieu

thuc u = U0cos(a t)

(U0, a khdng doi),

dung khang cua tu
dien bang dien trd,
cuon day la cuon
cam thuan co do tu
cam thay doi duoc.
Muen dien ap hieu
dung giua hai dau
cuon day cuc dai,

can dieu chinh cho
do tu cam cua cuon
day co gia tri bang

B.

oo

.

a

<b>Cau 365. Mot doan</b>

mach nei tiep gom
mot cuon day va
mot tu dien. Hieu
dien the hieu dung
hai dau doan mach,
hai dau cuon day,

hai dau tu dien deu
bang nhau. Tim he
se cdng suat cosp
cua mach.

^ C.
D. 0,25.

2 2

<b>Cau 366. Cho</b>

mach RLC nei

tiep, cuon day
thuan cam, R la
bien trd. Dien ap
hieu dung hai dau
doan mach bang U
khdng doi. Khi
dien trd cua bien

trd bang R1 va R2

nguai ta thay cdng
suat tieu thu trong
doan mach trong
hai truang hop
bang nhau. Tim

cong suat cuc dai
khi dien trd cua
bien trd thay doi.

U1
2
2

2

V

R
i
R
2
D U

2

(R i + R 2) 4R1R2
<b>Cau 367. Cho</b>

mach RLC nei
tiep. Trong do R va
C xac dinh.

Mach duoc dat
dudi hieu dien the

u=UV

2

sin( a t)V.

Vdi U khdng doi, a
cho trudc. Khi hieu
dien the hieu dung
giua hai dau cuon
cam cuc dai. Gia tri
cua L xac dinh
bang bieu thuc nao
sau?

1

_
„ 2

1

A

L=2CR2₊

C L=CR2₊

C

2
a
2

<i><b>r</b></i>

<i><b> </b></i>

<i><b>\</b></i>

2

C

2
a
2
'

<b>Cau 368. Cho</b>

mach RLC nei tiep.
Trong do R va L
xac dinh.

Mach duoc dat
dudi hieu dien the

u=U

<i><b>42 </b></i>

sin(a

t)

V

. Vdi U

LC

1
LC
2

C.

a

_L

+a

₂

=

LC

A

ao2=a

L2 + a2<b>Cau 361. Cho mach R,L,C tan se cua mach co the thay doi duoc, khi a = a</b>0 thi cong suat

C.

a

₀

=

_j

R

C.
R
2R
A. 0.
C.
a

A

0,5. B.

U

A.

R

i

+ R

2

2UC.

B. L=R2₊

C

a

₂
2
2

C

a

1

</div>
<span class='text_page_counter'>(47)</span><div class='page_container' data-page=47>

khdng doi,

a

cho trudc. Khi hieu dien the hieu dung giua hai
dau tu dien cuc dai. Gia tri cua C xac dinh bang bieu thuc nao
sau?

A C= 22

RL

2

+a

2_L

L
D. C =

R2

+a

_L _R

+ a

2_L

<b>Cau 369. Trong mach dien xoay chieu mac nei tiep gom tu dien</b>

C,cuon day thuan cam L va hop kln X. Biet ZL> Zc va hop kin X

chua hai trong 3 phan tu R C, L mac nei tiep. Cuang do ddng dien
i va hieu dien the u d hai dau doan mach cung pha vdi nhau thi
trong hop kln X phai co:

A RX va CXB. RX va LX C. LX va CX D. Rx<b> C, L Cau 370. </b>

Mot mach dien xoay chieu gom phan tu X nei tiep phan tu Y. Biet
rang X va Y la 1 trong 3 phan tu R, C, cuon day. Dat mot hieu
dien the hai dau doan mach

u=U>/2 sin(

a

t) V thi hieu dien the hieu dung UX = U

V

3,

UY = 2U va u khong cham pha han cuang do ddng dien i. Hai

phan tu X va Y tuang ung phai la:

527.

Dien trd va tu dien

528.

tu dien va cuon day khdng thuan cam

529.

Dien trd va cuon day khdng thuan cam

530.

Cuon day thuan cam va tu dien

<b>Cau 371. Mach dien xoay chieu AB gom cuon day cam thuan</b>

mac nei tiep vdi hop kln X. Biet rang hop kln chua 2 trong 3 phan

tu Ro, L, Co mac nei tiep. Dien ap hai dau mach A,B tre

pha — rad so vdi cuang do ddng dien trong mach. Cac phan tu 6
trong hop kln X gom:

A. L0 va C0 B. R0 va L0

C. Lo va C0<i> sao cho ZL = ZC</i> D. R va C0

<b>Cau 372. Mach dien xoay chieu R, L, C khdng phan nhanh. Bieu</b>

thuc hieu dien the hai dau doan mach co dang u=U0cos(2—ft+p)

trong do f thay doi, cdn R L, C, U0 cri gia tri khdng doi. Nguai ta

thay khi f = f va f = f thi cuang do ddng dien hieu dung trong
mach co cung mot gia tri. Gia tri cua f de ddng dien trong mach
cung pha vdi hieu dien the hai dau doan mach la

A f= f +f2 B. f=

V

ff C. f= >/f12 + f22 D. f =

f2
<b>Cau 373. Doan mach dien xoay chieu gom dien trd thuan R, cuon</b>

day thuan cam (cam thuan) L va tu dien C mac nei tiep. Ki hieu

uR uL , uc tuang ung la hieu dien the tuc thai d hai dau cac phan tu

R, L va C. Quan he ve pha cua cac hieu dien the nay

la

—

A. uR tre pha

3

so vdi uc . B. uc tre pha n so vdi uL .

— —

C. uL sdm pha

3

so vdi uc. D. UR sdm pha

3

so vdi uL .

<b>Cau 374. Ddng dien xoay chieu trong doan mach chi co dien trd</b>

thuan

531.

cung tan se vdi hieu dien the d hai dau doan mach va ci

pha ban dau ludn bang 0.

532.

cung tan se va cung pha vdi hieu dien the d hai dau doan
mach.

C. luon lech pha — so vdi hieu dien the d hai dau doan
2

mach.

D. cri gia tri hieu dung ti le thuan vdi dien trd cua mach.

<b>Cau 375. Doan mach dien xoay chieu AB chi chua mot trong</b>

cac phan tu: dien trd thuan, cuon day hoac tu dien. Khi dat hieu

dien the u = U0cosfat + —j len hai dau A va B thi ddng dien trong

mach co bieu thuc i = I0cosfat -— "j . Doan

mach AB chua

A cuon day thuan cam . B. dien trd thuan.

C. cuon day co dien trd thuan. D. tu dien.

<b>Cau 376. Trong mot doan mach dien xoay chieu chi co tu dien thi</b>

hieu dien the d hai dau doan mach

—

A. sdm pha — so vdi cuang do ddng dien.
B. sdm pha — so vdi cuang do ddng dien.

—

C tre pha so vdi cuang do ddng dien.

—

D. tre pha

3

so vdi cuang do ddng dien.

<b>Cau 377. Dat hieu dien the u = U</b>0sinat (U0 khdng doi) vao hai dau

doan mach RLC khdng phan nhanh. Biet dien trd thuan cua mach
khdng doi. Khi co hien tuong cong hudng dien trong doan mach,
phat bieu nao sau day sai?

533.

Cuang do hieu dung cua ddng dien trong mach dat gia tri

ldn nhat.

534.

Hieu dien the tuc thai d hai dau doan mach cung pha vdi

hieu dien the tuc thai d hai dau dien trd R.

535.

Cam khang va dung khang cua doan mach

bang nhau

D Hieu dien the hieu dung d hai dau dien trd R nho han hieu
dien the hieu dung d hai dau doan mach. <b>Cau 378. Mot doan mach</b>

gom tu dien co dien dung C, dien trd thuan R, cuon day co dien
trd trong r va he se tu cam L mac nei tiep. Khi dat vao hai dau
doan mach hieu dien the

u = U

-V

2cos (at) V thi ddng dien trong mach co gia tri hieu

dung la I. Biet cam khang va dung khang trong mach la khac
nhau. Cong suat tieu thu trong doan mach nay la

U2

B. (r+R ) I2_.

D. UI.

<b>Cau 379. Cho doan mach dien xoay chieu gom cuon day co dien</b>

trd thuan R, mac nei tiep vdi tu dien. Biet hieu dien the giua

R2

+a

2_L

L

L

2 . B.C= C. C =

—

A.
R + r

</div>
<span class='text_page_counter'>(48)</span><div class='page_container' data-page=48>

hai dau cuon day lech pha

3

so vdi hieu dien
the giua hai dau

doan mach. Mei lien he giua dien trd thuan R

vdi cam khang ZL cua cuon day va dung khang

Zc cua tu dien la

A R2

=

_Z_c_(Z_L

-

_Z_c_{). B. R}2

=

_Z_c

(Zc

-

ZL ).

C R2

=

_Z_L_(Z

c

-

ZL ) . D. R2

=

ZL ( ZL

-

Zc )

<b>Cau 380. Phat bieu nao sau day la dung khi noi</b>

ve ddng dien xoay chieu ba pha ?

A Khi cuang do ddng dien trong mot pha
bang khdng thi cuang do ddng dien trong hai
pha cdn lai khac khdng

536.

Chi co ddng dien xoay chieu ba pha

mdi tao duoc tir truang quay

537.

Ddng dien xoay chieu ba pha la he

thdng gom ba ddng dien xoay chieu mot pha,

lech pha nhau goc

3

538.

Khi cuang do ddng dien trong mot pha

cuc dai thi cuang do ddng dien trong hai pha
cdn lai cuc tieu.

539.

<b>Cau 381. Cho doan mach gom dien trd thuan R</b>

nei tiep vdi tu dien co dien dung C. Khi ddng
dien xoay chieu co tan se goc a chay qua thi
tong trd cua doan mach la

<b>Cau 382. Doan mach dien xoay chieu gom bien</b>

trd R, cuon day thuan cam co do tu cam L va tu
dien co dien dung C mac nei tiep. Biet hieu dien
the hieu dung hai dau doan mach la U, cam

khang ZL dung khang Zc (vdi Zc * ZL) va tan se

ddng dien trong mach khdng doi. Thay doi R

den gia tri R0 thi cong suat tieu thu cua doan

mach dat gia tri cuc dai Pm khi do

A. R0 = ZL + ZC.

Ro

2

D_-R_{0 =}Z_L-Z_C|

<b>Cau 383. Trong doan mach dien xoay chieu</b>

gom dien trd thuan, cuon cam thuan va tu dien
mac nei tiep thi

540.

dien ap giua hai dau tu dien nguoc pha

vdi dien ap giua hai dau doan mach.

541.

dien ap giua hai dau cuon cam cung

pha vdi dien ap giua hai dau tu dien.

C dien ap giua hai dau tu dien tre pha so vdi
dien ap giua hai dau doan mach.

D. dien ap giua hai dau cuon cam tre pha so
vdi dien ap giua hai dau doan mach.

<b>Cau 384. Khi dong ca khdng dong bo ba pha</b>

hoat dong on dinh, tir truang quay trong dong ca
co tan se

A bang tan se cua ddng dien chay trong cac
cuon day cua stato.

B. ldn han tan se cua ddng dien chay trong
cac cuon day cua stato.

542.

ci the ldn han hay nho han tan se cua

ddng dien chay trong cac cuon day cua stato,
tuy vao tai.

543.

nho han tan se cua ddng dien chay

trong cac cuon day cua stato.

<b>Cau 385. May bien ap la thiet bi</b>

544.

bien doi tan se cua ddng dien

xoay chieu.

545.

cri kha nang bien doi dien ap
cua ddng dien xoay chieu.

546.

lam tang cdng suat cua ddng

dien xoay chieu.

547.

bien doi ddng dien xoay chieu thanh

<b>ddng dien mot chieu Cau 387. Dat mot dien ap</b>
xoay chieu co gia tri hieu dung U vao hai dau
doan mach AB gom cuon cam thuan co do tu
cam L, dien trd thuan R va tu dien co dien dung

C mac nei tiep theo thu tu tren. Goi UL UR va

Uc lan luot la cac dien ap hieu dung giua hai dau

moi phan tu. Biet dien ap giua hai dau doan
mach

A.

C.

<i><b>y j R</b></i>

<i><b>2</b></i>

+(a

_C)2. D.

<i><b>y j R</b></i>

<i><b>2</b></i>

-(a

C)B. P_m

C. Pm

Z2

L

</div>
<span class='text_page_counter'>(49)</span><div class='page_container' data-page=49>

—

<b>Cau 388. Dat dien ap u = U</b>0cosat vao hai dau

doan mach gom dien trd thuan R, cuon cam
thuan co do tu cam L va tu dien co dien dung C
mac nei tiep. Goi i la cuang do ddng dien tuc

thai trong doan mach; uL, u2 va u3 lan luot la

dien ap tuc thai giua hai dau dien trd, giua hai
dau cuon cam va giua hai dau tu dien. He thuc
dung la

2

_{+ (aL -^-)B. i}

=

_u

3

a

C.

ui

_R

a

C

u₂

a

L

<b>Cau 389. Dat dien ap u = U</b>0cosat vao hai dau

cuon cam thuan cri do tu cam L thi cuang do
dong dien qua cuon cam la

a

L

^

C

i

=

—^cos

| a

t

a

L

^

2

_I

<b>_{Cau 390. Dat dien ap xoay chieu u=U}</b>₀_cosat

vao hai dau doan mach chi co dien trd thuan.

Goi U la dien ap hieu dung giua hai dau doan

mach; i, I0 va I lan luot la gia tri tuc thai, gia tri

cuc dai va gia tri hieu dung cua cuang do ddng
dien trong doan mach. He thuc nao sau day sai?

A2

<i><b>U</b></i>

-

_—

=

_{0 .}

U₀I₀c. <i><b>u</b></i>

-

i

=

0 .

U I

<b>Cau 391. Dat dien ap u = U</b>0 cos wt vao hai dau

doan mach

gom dien trd thuan R va tu dien C mac nei tiep.
Biet dien ap giua hai dau dien trd thuan va dien
ap giua hai ban tu dien co gia tri hieu dung bang
nhau. Phat bieu nao sau day la sai ?

A

U

2

=

_U

R

+

_U

C

+

_U

L

_{. B}

.

_U

C

=

U

R

+

U

L

+

U

2

_.

_c_U

_L

=

_u

_R

+

u

A

i =

R

2

C.

i =

2

—

B.

i = U

0

f

A

i

=

—-cos

I

,- cos

I a

t

+ a

W2

I

2

U

0

f

----^cos

I

a

t

a

W2

I

D. i =

B. —

+

—

=

V

2

JU J_

U

o

+

I

o

U

Uo

</div>
<span class='text_page_counter'>(50)</span><div class='page_container' data-page=50>

—

A Cuang do ddng dien qua mach tre pha

3

so vdi dien ap giua hai dau doan mach.

—

548.

Dien ap giua hai dau dien trd thuan

sdm pha

3

so vdi dien ap giua hai dau doan

mach.

—

549.

Cuang do ddng dien qua mach sdm

pha

3

so vdi dien ap giua hai dau doan mach.

—

550.

Dien ap giua hai dau dien trd thuan tre

pha

3

so vdi dien ap giua hai dau doan mach.

<b>Cau 392. Chon cau dung. Trong cac may phat </b>

dien xoay chieu mot pha: A phan tao ra tir

truang la roto.

551.

phan tao ra suat dien dong

cam ung la stato.

552.

Bo gop dien duoc nei vdi hai dau cua

cuon day stato. D suat den dong cua may ti

le vdi tec do quay cua rdto.

<b>Cau 393. Phat bieu nao sau day dung dei vdi</b>

may phat dien xoay chieu.

553.

Bien do cua suat dien dong ti le vdi se
cap cua nam charm.

554.

Tan se cua suat dien dong ti le vdi se

vdng day cua phan ung.

555.

Ddng dien cam ung chi xuat hien d cac

cuon day cua phan ung.

556.

Ca nang cung cap cho may duoc bien

doi hoan toan thanh dien nang.

<b>Cau 395. May phat dien xoay chieu mot pha va</b>

ba pha geng nhau d diem nao.

557.

Deu co phan ung quang,

phan cam ce dinh.

558.

Deu co bo gop dien de din

dien ra mach ngoai.

C deu co nguyen tac hoat dong dua tren hien
tuong cam ung dien tir.

D. Trong moi vdng day cua rdto, suat dien
dong cua may deu bien thien tuan hoan hai lan.

<b>Cau 396. Nguyen tac hoat dong cua may phat </b>

dien xoay chieu mot pha dua vao

A hien tuong tu cam. B. hien tuong cam

ung dien tir.

559.

Wrung day quay trong dien

truang.

560.

khung day chuyen dong trong

tu truang.

<b>Cau 397. Hien nay vdi cac may phat dien cdng</b>

suat ldn nguai ta thuang dung cach nao sau day
de tao ra ddng dien xoay chieu mot pha.

A Nam cham vinh cuu dung yen, cuon day
chuyen dong tinh tien so vdi nam cham.

561.

Nam cham vinh cuu dung yen, cuon

day chuyen dong quay trong ldng nam cham.

562.

Cuon day dung yen, nam cham vinh

cuu chuyen dong tinh tien so vdi cuon day.

D Cuon day dung yen, nam cham vinh cuu
chuyen dong quay trong ldng stato cri cuen cac
cuon day. <b>Cau 398. Phat bieu nao sau day dung</b>

dei vdi may phat dien xoay chieu mot pha.

A Ddng dien cam ung chi xuat hien d cac
cuon day cua phan ung.

563.

Tan se cua suat dien dong ti le vdi se

vdng day cua phan ung.

564.

Bien do cua suat dien dong ti le vdi se

cap cuc tir cua phan cam.

565.

Ca nang cung cap cho may duoc bien

doi tuan hoan thanh dien nang.

<b>Cau 399. Chon cau dung:</b>

A Ddng dien xoay chieu mot pha chi co the
do may phat dien xoay chieu mot pha tao ra.

B. Suat dien dong cua may phat dien xoay
chieu ti le vdi se vdng day cua phan ung.

C Ddng dien do may phat dien xoay chieu
tao ra luon cri tan se bang se vdng quay cua
rdto.

D. Chi co ddng xoay chieu ba pha mdi tao ra
tir truang quay.

<b>Cau 400. Trong cach mac ddng dien xoay</b>

chieu ba pha dei xung theo hinh tam giac, phat

bieu nao sau day la khdng dung.

</div>
<span class='text_page_counter'>(51)</span><div class='page_container' data-page=51>

566.

Hieu den the giua hai dau mot pha
bang hieu dien the giua hai day pha.

567.

Cong suat tieu thu tren moi pha deu

bang nhau.

568.

Cong suat cua ba pha bang ba lan cdng

<b>suat moi pha. Cau 401. Khi truyen tai dien </b>
nang cua ddng dien xoay chieu ba pha di xa ta
phai dung it nhat la bao nhieu day din.

A Hai day din. B. Ba diy din

C. Ben diy din. D. Sau day din.

<b>Cau 402. Phit bieu nao sau day ve dong ca </b>

khdng dong bo ba pha la sai. A Hai bo phan
chlnh cua dong ca la rdto va stato.

B. Bo phan tao ra tir truang quay la stato.

C Nguyen tac hoat dong cua dong ca la dua
tren hien tuong dien tir.

D. Ci the che tao dong ca khdng dong bo ba

pha vdi

cong suit ldn.

<b>Cau 403. Uu diem cua dong ca khdng dong bo </b>

ba pha so va dong ca dien mot chieu la gi. A Cri
tec do quay khdng phu thuoc vao tai.

569.

Cri chieu quay khdng phu thuoc vao

tin se ddng dien. B. Cri hieu suat cao han

570.

Cri khi nang bien dien nang thanh ca

nang.

<b>Cau 404. Phat bieu nao sau day la dung. Nguai</b>

ta co the tao ra tir truang quay bang cach cho
ddng dien:

</div>
<span class='text_page_counter'>(52)</span><div class='page_container' data-page=52>

571.

ddng dien xoay chieu mot pha chay
qua ba cuon day cua stato cua dong ca khdng
dong bo ba pha.

572.

ddng dien xoay chieu ba pha chay qua
ba cuon day cua stato cua dong ca khdng dong
bo ba pha

<b>Cau 405. Phat bieu nao sau day la khdng dung.</b>

Cam ung tir do ca ba cuon day gay ra tai tam
stato cua dong ca khdng dong bo ba pha, khi co
ddng dien xoay chieu ba pha di vao dong ca co:

A. do ldn khdng doi. B. phuang khdng doi.

C. hudng quay deu. D. tan se quay bang tan
<b>se ddng dien. Cau 406. Phat bieu nao sau day la</b>
dung.

A Ddng dien xoay chieu mot pha chi co the
do may phat dien xoay chieu mot pha tao ra.

B Suat dien dong cua may phat dien xoay
chieu ti le vdi se vdng quay trong mot phut cua
rd to.

573.

Ddng dien do may phat dien xoay

chieu tao ra ludn co tan se bang tan se quay cua
rd to.

574.

Chi co ddng dien xoay chieu ba pha

mdi tao ra tir truang quay.

<b>Cau 407. Thiet bi nao sau day co tlnh thuan </b>

nghich.

575.

Dong ca khdng dong bo ba

pha.

576.

Dong ca khdng dong bo mot

pha.

577.

May phat dien xoay chieu

mot pha.

578.

May phat dien mot chieu.

<b>Cau 408. Chon cau sai. Trong qua trinh tai dien</b>

nang di xa, cong suat hao phl:

579.

ti le vdi thai gian truyen tai.

580.

ti le vdi chieu dai duang day

tai dien.

581.

ti le nghich vdi binh phuang hieu dien

the giua hai day d tram phat dien.

582.

ti le vdi binh phuang cdng

suat truyen di.

<b>Cau 409. Bien phap nao sau day khong grip</b>

phan tang hieu suat cua may bien the.

583.

Dung day din co dien trd suat nho lam
day cuen bien the.

584.

Dung loi sat co dien trd suat

nho.

585.

Dung loi sat gom nhieu la mong ghep

cach dien vdi nhau.

586.

Dat cac la thep song song vdi mat

phng chua cac duang suc tir.

<b>Cau 410. Nhan xet nao sau day ve may bien the</b>

la khong
dung.

A May bien the co the tang hieu dien the.

587.

May bien the co the giam

hieu dien the.

588.

May bien the co the thay doi
tan se ddng dien xoay chieu.

589.

May bien the co tac dung bien doi

<b>cuang do ddng dien. Cau 411. Hien nay nguai </b>
ta thuang dung cach nao sau day de lam giam
hao phl dien nang trong qua trinh truyen tai di
xa.

A. Tang tiet dien day din dung de truyen tai.B.
Xay dung nha may dien gan nai tieu thu. C.
Dung day din bang vat lieu sieu din.

D Tang hieu den the trudc khi truyen tai dien
nang di xa <b>Cau 412. Phuang phap lam giam </b>

hao phl dien nang trong may bien the la

590.

de may bien the d nai khd

thoang.

591.

loi cua may bien the duoc cau tao bang

mot khei thep dac.

C loi cua may bien the duoc cau tao bdi cac
la thep mong ghep cach dien vdi nhau.

D. Tang do cach dien trong may bien the.

<b>Cau 413. Bien phap nao sau day khdng lam </b>

tang hieu suat cua may bien the.

592.

Dung loi sat co dien trd suat
nho.

593.

Dung day co dien trd suat

nho lam day quan bien the.

594.

Dung loi sat gom nhieu la thep mong

ghep cach dien vdi nhau.

595.

Dat cac la sat song song vdi mat phng

chua cac duang suc.

<b>Cau 413. Nguyen tac hoat dong cua may phat</b>

dien xoay chieu mot pha dua vao

596.

hien tuong tu cam.

</div>
<span class='text_page_counter'>(53)</span><div class='page_container' data-page=53>

598.

Wrung day quay trong dien
truang.

599.

khung day chuyen dong

trong tir truang.

<b>Cau 414. Hien nay vdi cac may phat dien cdng</b>

suat ldn nguai ta thuang dung cach nao sau day
de tao ra ddng dien xoay chieu mot pha.

A Nam cham vinh cuu dung yen, cuon day
chuyen dong tinh tien so vdi nam cham.

600.

Nam cham vinh cuu dung yen, cuon

day chuyen dong quay trong ldng nam cham.

601.

Cuon day dung yen, nam cham vinh

cuu chuyen dong tinh tien so vdi cuon day.

D Cuon day dung yen, nam cham vinh cuu
chuyen dong quay trong ldng stato cri cuen cac
cuon day. <b>Cau 415. Trong cach mac ddng dien </b>

xoay chieu ba pha dei xung theo hinh sao, phat
bieu nao sau day la khdng dung.

A Ddng dien trong day trung hoa bang
khdng.

B. Ddng dien trong moi pha bang dao dong
trong moi day pha.

C Hieu dien the pha bring

V

3 hieu dien the
giua hai day pha.

602.

Truyen tai dien nang bang 4 day din,

day trung hoa cri tiet dien nho nhat.

<b>Cau 416. Trong cach mric ddng dien xoay</b>

chieu ba pha dei xung theo hinh tam giac, phat
bieu nao sau day la khdng dung.

603.

Ddng dien trong moi pha bang ddng
dien trong moi day pha.

604.

Hieu den the giua hai mot pha bang

hieu dien the giua hai day pha.

605.

Cong suat tieu thu tren moi

</div>
<span class='text_page_counter'>(54)</span><div class='page_container' data-page=54>

2 —
D. Cong suat cua ba pha bang ba cdng suat

<b>moi pha. Cau 417. Phat bieu nao sau day la </b>
dung.

606.

Nguyen tac hoat dong cua dong ca

khdng dong bo ba pha chi dua tren hien tuong
cam ung dien tir.

607.

Nguyen tac hoat dong cua dong ca

khdng dong bo ba pha chi dua tren hien tuong
tu cam.

C Nguyen tac hoat dong cua dong ca khdng
dong bo ba pha dua tren hien tuong cam ung
dien tir va luc tir tac dung len ddng dien.

D. Nguyen tac hoat dong cua dong ca khdng
dong bo ba pha dua tren hien tuong tu cam va
<b>luc tir tac dung len ddng dien. Cau 418. Nguai </b>
ta thuang dung dung cu nao sau day de chinh
luu ddng dien xoay chieu thanh ddng dien mot
chieu.

A Trandito ban din. B. Ddt ban din.

608.

Tri

ac ban din. D.

Thiristo ban din.

<b>Cau 419. Phat bieu nao sau day la </b>

<b>khdng dung.</b>

A Chinh luu ddng dien xoay chieu la bien
doi ddng dien xoay chieu thanh ddng dien mot
chieu.

B Chinh luu ddng dien xoay chieu la bien
doi ddng dien mot chieu thanh ddng dien xoay
chieu.

609.

Sau khi chinh luu nua chu ky, ddng

dien mot chieu iMp nhay co tan se bang tan se
cua ddng dien xoay chieu.

610.

Sau khi chinh luu ca hai nua chu ky,

ddng dien mot chieu nhap nhay co tan se gap
hai lan tan se cua ddng dien xoay chieu.

<b>Cau 420. Thiet bi nao sau day khdng co kha </b>

nang bien doi ddng dien xoay chieu thanh ddng
dien mot chieu. A Mot ddt chinh luu.

611.

Ben ddt mac thanh mach cau.

612.

Hai vanh ban khuyen cung hai choi

quet trong may phat dien.

D Hai vanh khuyen cung hai choi quet trong
may phat

dien.

<b>Cau 421. May bien ap la thiet bi A bien doi tan </b>

se cua ddng dien xoay chieu. B cri kha nang

bien doi dien ap cua ddng dien xoay chieu

613.

lam tang cdng suat cua ddng

dien xoay chieu.

614.

bien doi ddng dien xoay chieu thanh

ddng dien mot chieu.

<b>Cau 422. Dat dien ap xoay chieu u=U</b>0cos2nft

(U0 khdng doi, fthay doi duoc) vao hai doan

mach chi co tu dien. Phat bieu nao sau day

dung?

A Cuang do ddng dien hieu dung trong doan
mach cang ldn khi tan se fcang ldn.

615.

Dien ap giua hai dau doan

mach sdm pha

3

so vdi

cuang do ddng dien trong doan mach.

616.

Cuang do ddng dien hieu dung trong

doan mach khdng doi khi tan se fthay doi.

617.

Dung khang cua tu dien cang

ldn khi tan se fcang ldn.

<b>Cau 423. Dat dien ap xoay chieu u = U</b>0cosat

(U0 khdng doi va a thay doi duoc) vao hai doan

mach gom dien trd thuan R, cuon cam thuan co
do tu cam L va tu dien co dien dung C mac nei

tiep, vdi CR2_{< 2L. Khi a = a}

l hoac a = a2 thi

dien ap hieu dung giua hai ban tu dien co cung

mot gia tri. Khi a = a0 thi dien ap hieu dung giua

hai ban tu dien dat cuc dai. He thuc lien he giua
aL, a2 va a0 la

A.

a

₀

=

I

(a

₁

+a

₂

)

B.

a

2

=

L

(a

2

+aQ

2

C.

a0 =

V

a1a2

<b>Cau 424. Dat dien ap u </b>

=

U-s/2 cos

a

t vao
hai dau mot tu dien thi cuang do ddng dien qua
no co gia tri hieu dung la I. Tai thai diem t, dien
ap d hai tu dien la u va cuang do ddng dien

2_I2₂

2 • 2

-2 iIT iC — + — = 2

2

2

<b>A</b>u i 1 A — + —

U I2₄

B. ^ <i><b>+</b><b> ~ </b></i>= 1

U2_{Iqua nri la i.}

He thuc lien he

2

2

2 _i<i><b>_{^ ur}</b></i>_r

</div>
<span class='text_page_counter'>(55)</span><div class='page_container' data-page=55>

U2
2

<b>Cau 425. Trong doan mach dien xoay chieu</b>

gom dien trd thuan mac nei tiep vdi cuon cam
thuan, so vdi dien ap hai dau doan mach thi
cuang do ddng dien trong mach co the

A. tre pha

—

C. sdm pha —. D. tre pha

2 4

<b>Cau 426. Dat dien ap xoay chieu u=U</b>0cos2—ft,

cri U0 khong

doi va f thay doi duoc vao hai dau doan mach
co R, L, C mac

nei tiep. Khi f = 10 thi trong doan mach co cong

hudng dien. Gia

tri cua f la

2—

/LC

'

<i><b>' </b></i>

V

LC

' V

LC 2—

V

LC

<b>CHUTONG IV. SONG DIEN </b>
<b>T l . Cau 427. Chon phuang an Dung. Dao </b>

dong dien ti trong mach LC la qua trinh:

618.

bien doi khdng tuan hoan cua

dien tlch tren tu dien.

619.

bien doi theo ham se mu cua

chuyen dong.

C chuyen hoa tuan hoan giua nang luong ti
truang va nang luong dien truang.

D. bao toan hieu dien the giua hai ban cuc tu
<b>dien. Cau 428. Tim phat bieu sai ve nang luong </b>
trong mach dao dong LC:

620.

Nang luong cua mach dao dong gom

co nang luong dien truang tap trung d tu dien va
nang luong ti truang tap trung d cuon cam.

621.

Nang luong dien truang va nang luong
ti truang cung bien thien dieu hoa vdi tan se cua
ddng dien xoay chieu trong mach.

622.

Khi nang luong dien truang trong tu

giam thi nang luong tir truang trong cuon cam
tang len va nguoc lai.

2_{IB. sdm pha}

—

</div>
<span class='text_page_counter'>(56)</span><div class='page_container' data-page=56>

2 —
D. Tai moi thai diem, tong nang luong dien

truang va nang luong ti truang la khdng doi, noi
cach khac, nang luong cua mach dao dong duoc
bao toan.

<b>Cau 429. Mot mach dao dong gom mot cuon</b>

cam co L va mot tu dien co dien dung C thuc
hien dao dong dien ti khdng tat. Gia tri cuc dai

cua hieu dien the giua hai ban tu dien bang UnHx.

Gia tri cuc dai cua cuang do ddng dien trong
mach la:

A. Im

C. Im

<b>Cau 430. Mach dao dong dien ti dieu hoa ci cau </b>

tao gom:

623.

nguon dien mot chieu va tu dien mac

thanh mach kln.

624.

nguon dien mot chieu va cuon cam

mac thanh mach kln.

625.

nguon dien mot chieu va dien trd mac

thanh mach kln.

626.

tu dien va cuon cam mac thanh mach
kln.

<b>Cau 431. Mach dao dong dien ti dieu hoa LC ci </b>

chu ky

627.

phu thuoc vao L, khong phu thuoc vao

C.

628.

phu thuoc vao C, khong phu thuoc vao

L.

629.

phu thuoc vao ca L va C.

630.

khong phu thuoc vao L va C.

<b>Cau 432. Mach dao dong dien ti dieu hoa gom</b>

cuon cam L va tu dien C, khi tang dien dung
cua tu dien len 4 lan thi chu ky dao dong cua
mach

A. tang len 4 lan. B. tang len 2

lan.

C. giam di 4 lan. D. giam di 2

lan.

<b>Cau 433. Nhan xet nao sau day ve dac diem cua</b>

mach dao dong dien tir dieu hoa LC la khdng
dung.

631.

Dien tlch trong mach bien

thien dieu hoa.

632.

Nang luong dien truang tap

trung chu yeu d tu dien.

633.

Nang luong tir truang tap

trung chu yeu d cuon cam.

D Tan se dao dong cua mach phu
thuoc vao dien tlch cua tu dien.

<b>Cau 434. Dao dong dien tir tu do trong</b>

mach dao dong la mot ddng dien xoay chieu co:

A Tan se rat ldn. B. Chu ky rat
ldn.

C. Cuang do rat ldn. D. Hieu dien the rat
<b>ldn. Cau 435. Chu ky dao dong dien tir tu do </b>
trong mach dao dong L, C duoc xac dinh bdi he
thuc nao dudi day:

A T = 2—

D T = 2—

V

LC .
LC

<b>Cau 436. Mach dao dong dien ti dieu hoa gom</b>

cuon cam L va tu dien C. Khi tang do tu cam
cua cuon cam len 2 lan va giam dien dung cua
tu dien di 2 lan thi tan se dao dong cua mach

A khdng doi. B. tang 2 lan. C. giam 2 lan. D.
<b>tang 4 lan. Cau 437. Mach dao dong dien tir </b>
gom tu dien C va cuon cam L, dao dong tu do
vdi tan se goc

A a = 2—

V

LC

C

.

a =

V

LC

LC

<b>Cau 438. Nguai ta dung cach nao sau day de</b>

duy tri dao dong dien ti trong mach vdi tan se

rieng cua no.

634.

Dat vao mach mot hieu dien the xoay

chieu.

D. Im

B. Im

LC

B. T = 2—

2—
C. T

B.

a

V

LC

1

</div>
<span class='text_page_counter'>(57)</span><div class='page_container' data-page=57>

635.

Dat vao mach mot hieu dien the mot

chieu khdng doi. C Dung may phat dao dong

dien tir dieu hoa.

D. Tang them dien trd cua mach dao dong.

<b>Cau 439. Phat bieu nao sau day la sai khi noi ve </b>

dien tir truang.

636.

Khi tir truang bien thien theo thai gian,

no sinh ra mot dien truang xoay.

637.

Khi dien truang bien thien theo thai

gian, no sinh ra mot tir truang xoay.

C Dien truang xoay la dien truang ma cac
duang suc la nhung duang cong.

D. Ti truang xoay co cac duang suc ti bao
quanh cac duang suc dien.

<b>Cau 440. Chon cau Dung. Trong dien ti truang,</b>

cac vecta cuang do dien truang va vecta cam
ung tir ludn:

638.

cung phuang, nguoc chieu.

639.

cung phuang, cung chieu.

C co phuang vudng goc vdi nhau.

D. co phuang lech nhau goc 452

0<b>_{. Cau 441. Chon phuang an Dung. Trong mach}</b>

dao dong LC, ddng dien dich trong tu dien va
ddng dien trong cuon cam co nhung diem geng
nhau la:

640.

Deu do cac electron tu do tao thanh.

641.

Deu do cac dien rich tao thanh.

642.

Xuat hien trong

dien truang tinh. D

Xuat hien trong dien
truang xoa .

<b>Cau 442. Phat bieu nao sau day la khdng dung.</b>

643.

Ddng dien din la ddng chuyen dongco

hudng cua cac dien tlch.

644.

Ddng dien dich la do dien truang bien

thien sinh ra.

C. Ci the dung ampe ke de do truc tiep ddng

dien din.

D Cri the dung ampe ke de do truc tiep ddng
dien dich.

<b>Cau 443. Phat bieu nao sau day la dung khi noi</b>

ve song dien
ti.

A Khi mot dien tlch diem dao dong thi se co
dien tir truang lan truyen trong khdng gian dudi
dang song.

645.

Dien tlch dao dong khdng the buc xa

song dien tir.

646.

Tec do cua song dien tir trong chan

khdng nho han nhieu lan so vdi tec do anh sang
trong chan khong.

647.

Tan se cua song dien tir chi bang nua

tan se dien tlch dao dong.

<b>Cau 444. Song dien tir nao sau day co kha nang</b>

xuyen qua

tang dien li.

A. Sring dai. B. Sring trung

C. Sring ngan. D Sring cuc

</div>
<span class='text_page_counter'>(58)</span><div class='page_container' data-page=58>

2 —

<b>Cau 445. Song dien ti nao sau day bi phan xa</b>

manh nhat d
tang dien li.

A. Sring dai. B. Sring trung

C. Sring ngan. D. Sring cuc
ngan.

<b>Cau 446. Song dien ti nao sau day duoc dung</b>

trong viec

truyen thdng tin trong nudc.

A Sring dai. B. Sring trung

C. Sring ngan. D. Sring cuc

ngan.

<b>Cau 447. Chon cau Dung. Vdi mach dao dong</b>

hd thi vung
khong gian

648.

quanh day din chi co ti

r

truang bien

thien.

649.

quanh day din chi co dien truang bien

thien.

650.

Ben trong tu dien khdng co ti

r

truang bien thien.

D quanh day din co ca ti

r

truang bien thien
va dien truang bien thien.

<b>Cau 448. Nguyen tac thu song dien ti</b>

r

dua
vao A hien tuong cong hudng dien trong
mach LC.

651.

hien tuong buc xa song dien ti

r

cua

mach dao dong hd.

652.

hien tuong hap thu song dien ti

r

cua

mdi truang.

653.

hien tuong giao thoa song dien ti

r.

<b>Cau 449. Mach dao dong dien ti</b>

r

dieu hoa cri
cau tao gom:

654.

nguon dien mot chieu va tu dien mac

thanh mach kln.

655.

nguon dien mot chieu va cuon cam

mac thanh mach kln.

656.

nguon dien mot chieu va dien trd mac

thanh mach kln. D tu dien va cuon cam mac

thanh mach kln.

<b>Cau 450. Phat bieu nao sau day ve tlnh chat cua</b>

song dien ti

r

la khdng dung.

657.

Song dien ti la sing ngang.

D Song dien ti

r

khdng truyen duoc trong
chan khdng.

658.

Song dien ti

r

mang nang luong.

659.

Song dien ti

r

co the phan xa, khuc

xa, giao thoa.

<b>Cau 451. Song dien ti va song ca hoc khdng co</b>

chung tlnh chat nao dudi day.

A. Phan xa B. Mang nang luong. C. Khuc
xa.

D Truyen duoc trong chan khdng. <b>Cau 452. </b>

Song dien ti la qua trinh lan truyen cua dien ti
truang bien thien, trong khong gian. Khi nii ve

quan he giua dien truang va ti

r

truang cua

dien ti

r

truang tren thi ket luan nao sau day la

dung.

660.

Vecta cuang do dien truang va cam

ung ti cung phuang va cung do ldn.

661.

Tai moi diem cua khdng gian, dien

truang va ti truang ludn ludn dao dong nguoc
pha.

662.

Tai moi diem cua khdng gian, dien

truang va ti

r

truang ludn ludn dao dong lech

pha nhau n2.

D Dien truang va ti

r

truang bien thien theo
thai gian vdi cung chu ki.

<b>Cau 453. Mot mach dao dong LC co dien trd</b>

thuan khdng dang ke, gom mot cuon day co he
se tu cam L va mot tu dien co dien dung C.
Trong mach co dao dong dien ti rieng (tu do)
vdi gia tri cuc dai cua hieu dien the d hai ban tu

dien bang Umax. Gia tri cuc dai InHx cua cuang

do ddng dien trong mach duoc tlnh bang bieu
thuc

A.I_{m a x}=U_m

B.I_maxU_max

V

LC

D.I_{m a x}=U_m

<b>Cau 454. Trong mach dao dong LC co dien trd</b>

thuan bang khong thi

663.

nang luong ti truang tap trung d cuon

cam va bien thien vdi chu ki bang chu ki dao
dong rieng cua mach.

664.

nang luong dien truang tap trung d

cuon cam va bien thien vdi chu ki bang chu ki
dao dong rieng cua mach.

665.

nang luong ti

r

truang tap trung d tu

dien va bien thien vdi chu ki bang nua chu ki
dao dong rieng cua mach.

D nang luong dien truang tap trung d tu dien
va bien thien vdi chu ki bang nua chu ki dao
dong rieng cua mach. <b>Cau 455. Phat bieu nao </b>

sai khi nrii ve song dien ti

r.

C I = U_max

</div>
<span class='text_page_counter'>(59)</span><div class='page_container' data-page=59>

666.

Song dien ti

r

la su lan truyen trong

khdng gian cua dien ti

r

truang bien thien theo

thai gian.

667.

Trong song dien ti

r,

dien truang va
ti

r

truang ludn dao dong lech pha nhau n2.

668.

Trong song dien ti

r,

dien truang va

ti

r

truang bien thien theo thai gian vdi cung

chu ki.

669.

Song dien ti

r

dung trong thong tin

vo tuyen goi la sring vo tuyen.

<b>Cau 456. Khi nii ve song dien ti, phat bieu nao</b>

dudi day la sai.

A Trong qua trinh truyen song dien ti

r,

vecta cuang do dien truang va vecta cam ung
ti

r

ludn cung phuang.

670.

Song dien ti

r

truyen duoc trong mdi

truang vat chat va trong chan khong.

671.

Trong chan khdng, song dien ti

r

lan

truyen vdi van tec bang van tec anh sang.

672.

Song dien ti bi phan xa khi gap mat

phan cach giua hai mdi truang.

<b>Cau 457. Mot mach dao dong LC co dien trd</b>

thuan bang khong gom cuon day thuan cam
(cam thuan)va tu dien co dien dung C. Trong
mach co dao dong dien ti tu do (rieng) vdi tan se
f Khi mac nei tiep vdi tu dien trong mach tren
mot tu dien co dien dung C/3 thi tan se dao

dong dien ti

r

tu do (rieng) cua mach luc nay

bang

A f4. B. 4f C 2f <b>D. f2. Cau 458. </b>

Dei vdi su lan truyen seng dien ti

r

thi

673.

vecta cuang do dien truang E cung

phuang vdi phuang truyen song cdn vector cam

ung ti

r

B vuong gric vdi vecta cuang do dien

truang E.

674.

vecta cuang do dien truang E va vecta

cam ung ti

r

B ludn cung phuang vdi phuang

truyen song.

</div>
<span class='text_page_counter'>(60)</span><div class='page_container' data-page=60>

D. vecta cam ung tir

B

cung phuang vdi
phuang truyen sring cdn vecta cuang do dien

truang

E

vuong gric vdi vecta cam ung tir

B

.

<b>Cau 459. Trong mot mach dao dong LC khdng</b>

co dien trd thuan, co dao dong dien tir tu do
(dao dong rieng). Hieu dien the cuc dai giua hai
ban tu va cuang do ddng dien cuc dai qua mach

lan luot la U0 va I0. Tai thai diem cuang do ddng

dien

trong mach co gia tri

3-

thi do ldn hieu dien the

giua hai ban tu
dien la

A 3

_U

0

.

B. —

U

0

.

C. L

U

0

.

D. —

U

0

.

4

0



_{— 2}

0



₂

0

₄

<b>Cau 460. Trong sa do cua mot may phat song vd</b>

tuyen dien, khong ci mach (tang)

A. tach sing B. khuech dai C.
phat dao
dong cao tan D. bien dieu

0
A.U₀

<b>Cau 461. Mot mach dao dong LC ll tudng, gom</b>

cuon cam thuan co do tu cam L va tu dien co
dien dung C. Trong mach co dao dong dien ti tu

do. Goi U0, I0 lan luot la hieu dien the cuc dai

giua hai dau tu dien va cuang do ddng dien cuc
dai trong mach thi

I

B.

U

o

=

I

o
D

.

u

0

= i

0

VLC .

C. luon cung pha nhau D. vdi cung tan se.

<b>Cau 465. Song dien ti</b>

675.

la sing doc hoac song ngang.

676.

la dien ti truang lan truyen
trong khdng gian.

677.

cri thanh phan dien truang va thanh

phan ti truang tai mot diem dao dong cung
phuang.

678.

khong truyen duoc trong

chan khdng.

<b>Cau 466. Mach dao dong ll tudng gom cuon</b>

cam thuan co do tu cam L va tu dien co dien

dung C dang thuc hien dao dong dien ti tu do.

Goi U0 la dien Ap cuc dai giua hai ban tu. u va i

la dien Ap giua hai ban tu va cuang do ddng
dien trong mach tai thai diem t. He thuc dung la

A i2

=

_LC

(

_U2

-

_u2

)

_._{B. i}2

=

_L

(

_U2

-

u2

)

_{. C. i}2

= V

_LC

(

_U₀

-

_u2

)

_{. D.}

i2

=

<i><b>_C</b></i>

(

_U2

-

_u2

)

_.

C

<b>Cau 467: Chon y dung. Trong mach dao dong</b>

co su bien thien tuang ho giua

679.

dien truang va ti truang

680.

hieu dien the va cuang do

ddng dien

681.

dien tlch va ddng dien

D nang luong dien truang va nang luong ti
truang <b>Cau 468: Trong mach dao dong dien ti </b>

LC

682.

q, i bien thien dieu hda cung

pha

683.

q, i bien thien dieu hda nguoc

pha

684.

q bien thien dieu hda nhanh

pha han i

<b>Cau 462. Khi nii ve</b>

dao dong dien ti
trong mach dao
dong LC ll tudng,
phat bieu nao sau
day sai.

685.

Cuang do

ddng dien qua
cuon cam va hieu
dien the giua hai
ban tu dien bien
thien dieu hda theo
thai gian vdi cung
tan se.

686.

Nang
luong dien ti cua
mach gom nang
luong ti truang va

nang luong dien
truang.

687.

D

ien tich cua mot
ban tu dien va
cuang do ddng
dien

trong mach bien
thien dieu hda theo
thai gian lech pha
nhau

D Nang luong ti
truang va nang
luong dien truang
cua mach ludn
cung tang hoac
luon cung giam.

<b>Cau 463. Mot</b>

mach dao dong

0

LC

C

C. U

o

=

I

o

—

</div>
<span class='text_page_counter'>(61)</span><div class='page_container' data-page=61>

dien ti LC ll tudng
gom cuon cam
thuan do tu cam L
va tu dien co dien
dung thay doi duoc
tir C1 den C2.
Mach dao dong
nay ci chu ki dao
dong rieng thay doi
duoc.

A tir 4

—

V

LCL den 4—

V

LC2 .

688.

ti

den 2—

V

LC2

689.

t

i ^^LCI den

<i><b>2 y</b></i>

<i>[LC<b>2</b></i>

690.

t

i 4-y/LCI den

<i><b>^yfLC!</b></i>

<b>Cau 464. Trong </b>

mach dao dong LC
ll tudng dang co
dao dong dien ti tu
do, dien tlch cua
mot ban tu dien va
cuang do ddng
dien qua cuon cam
bien thien dieu hda
theo thai gian A.
ludn nguoc pha
nhau. B. vdi cung
bien do.

Djq bien thien
dieu hda cham
pha han i

3

<b>Cau 470: Chon</b>

phat bieu dung.
trong mach dao
dong LC ll tudng

thi cac dai luong q,

i, uC bien thien

dieu hda cung tan
se va

A. q, i bien thien
cung pha B. u, i
bien thien cung
pha C q, u bien
thien cung pha

D. q, i bien thien
nguoc pha

<b>Cau 471: Chon cau</b>

dung. Cam ung ti
B trong mach dao
dong

dien bien thien dieu
hda

A ti le thuan vdi
i

B. ti le thuan vdi
q

C. ti le nghic vdi
i

D. ti le nghic
vdi q

<b>Cau 472: Cam ung</b>

ti B trong mach
dao dong dien ludn
bien

thien dieu hda cung
tan se va

A. nguoc pha
vdi i

B. cung pha vdi
i

C. cung pha vdi
q

D. nguoc pha
vdi q

<b>Cau 473: Goi T la</b>

chu ki bien thien
cua dien tlch dau
ban tu

trong mach dao
dong dien. Nang
luong ti truang
trong cuon

cam

691.

b

ien thien dieu
hda vdi chu ki T

692.

b

ien thien dieu

hda vdi chu ki
2T

C bien thien

dieu hda vdi chu

ki D. khong

bien thien dieu

hda
T

</div>
<span class='text_page_counter'>(62)</span><div class='page_container' data-page=62>

<b>Cau 474: Goi f la tan se bien thien cua dien tlch</b>

dau ban tu trong mach dao dong dien. Nang
luong dien ti trong mach dao dong LC

693.

bien thien dieu hda vdi chu ki f

694.

bien thien dieu hda vdi chu ki 3f

f

695.

bien thien dieu hda vdi chu ki —

2

D ludn duoc bao toan <b>Cau 475: Trong mach </b>

dao dong dien khdng ll tudng co dien trd R.
Chon phat bieu sai?

696.

Nang luong dien ti cua mach giam dan

theo thai gian

697.

Nang luong

mach giam do toa

nhiet C Khi R rat ldn

thi mach vin dao dong

D. R cang ldn thi su tat dan cang nhanh

<b>Cau 476: Khi dat vao hai dau mach dao dong</b>

LC co dien trd thuan R mot hieu dien the u =

U0cos at thi mach se

A dao dong vdi tan se goc a B. khong dao
dong

698.

dao dong vdi tan se goc a = 1

0_VLC

699.

dao dong tat dan

<b>Cau 477: Chon phat bieu sai? Trong mach dao</b>

dong dien ti cuong buc thi bien do ddng dien
trong mach

700.

phu thuoc vao tan se hieu dien the

cuong buc

701.

khong phu thuoc dien trd thuan cua
mach

702.

khi cong hudng thi ddng dien cung pha

vdi hieu dien the

703.

dat cuc dai khi tan se cuong buc bang

tan se rieng cua mach

<b>Cau 478: Truang hop nao sau day se sinh ra</b>

mot dien ti truang

1. Thanh nam cham rai qua mot eng day 2.
Dien tlch dien dung yen trong khong gian

3. Dien tlch dao dong dong xung quanh mot
vi trl4. Nei hai ban tu da tch dien vdi hai
cuon cam

A 1., 3., 4. B. 1., 2., 3. C. 1., 2., 4. D. 2.,
<b>3., 4. Cau 479: Chon phat bieu sai?</b>

704.

Ti truang bien thien theo thai gian xuat

hien dien truang xoay.

705.

Ti truang bien thien theo thai gian se

xuat hien dien ti truang.

C Truang xoay la truang co cac duang suc la
cac duang cong hd, tuc la cac duang co diem
va diem cuei.

D. Dien tlch diem dao dong dieu hda se xuat
hien mot dien ti truang.

<b>Cau 480: Song dien ti</b>

A. trong chan khong la sring ngang B. la

sring ngang

706.

l

a sing doc

D. trong moi

truang chat ran la sring doc

<b>Cau 481: Hai thanh phan E va B cua song dien</b>

ti ludn vuong gic vdi phuang truyen song, dao
dong tren hai phuang vuong gric vdi nhau va

707.

ludn dao dong nguoc pha

708.

ludn dao dong vudng pha

709.

ludn dao dong cung pha

710.

dao dong lech pha bat ki

<b>Cau 482: Quy trinh sau khong phai la quy trinh</b>

chung trong truyen thdng song dien ti

711.

Bien tln hieu thanh dao dong dien co

tan se thap (goi la tin hieu am tan)

712.

Dung cac song dien ti tan se thap (am
tan) mang tln hieu am tan di xa.

713.

Dung may thu (angten thu) de thu

song dien ti cao tan

714.

Tach tin hieu ra khoi song cao tan roi

dung loa de nghe am va man hinh de xem hinh
anh

<b>Cau 483: Chon cau sai khi noi ve song dien ti</b>

715.

Song dien ti la sring ngang

716.

Sring dien ti co the lan truyen trong tat

ca mdi truang ke ca chan khdng

717.

song dien ti cri the phan xa va khuc xa

D Hai thanh phan dien truang va ti truang
ludn dao dong vuong pha vdi nhau

<b>Cau 484: Chon cau dung? He theng phat thanh </b>

bao gom

718.

Dao dong cao tan, bien dieu, khuech
dai cao tan, angten phat

719.

Dao dong am tan, bien dieu, khuech

dai cao tan, angten phat

720.

Chon song, dao dong cao tan, khuech

dai cao tan, angten phat

721.

Tach sring, bien dieu, khuech dai cao

</div>
<span class='text_page_counter'>(63)</span><div class='page_container' data-page=63>

A. Sing cuc ngan duoc dung de truyen thdng

qua ve tinh B. Song dai thuang duoc truyen
thdng dudi nudc C. Vao ban dem song trung

truyen di duoc xa han D Sring ngan co the

xuyen qua duoc tang dien ly <b>Cau 486: Dien </b>

truang trong mach dao dong dien ti bien thien
tuan hoan

722.

nguoc pha vdi dien tlch cua tu.

723.

cung pha vdi ddng dien trong mach.

724.

nguoc pha vdi ddng dien trong mach.

D cung pha vdi hieu dien the giua hai ban tu.

<b>Cau 487: Dac diem geng nhau giua song ca va </b>

song dien ti
la

725.

gom ca song ngang va sring doc.

726.

deu truyen di nha luc lien ket giua cac

phan tu mdi truang.

727.

deu truyen

duoc trong chan

khdng. D qua trinh

truyen pha dao dong.

<b>Cau 488: Phat bieu nao sau day ve dien ti truang</b>

la dung?

A Su bien thien cua dien truang giua cac ban
tu se sinh ra mot ti truang nhu ti truang do ddng
dien trong day din nei vdi tu dien.

728.

Ddng dien chay qua tu den(ddng dien

dich) ung vdi su dich chuyen cua cac dien tlch
trong tu dien.

729.

Dien truang trong tu dien bien thien

</div>
<span class='text_page_counter'>(64)</span><div class='page_container' data-page=64>

D. Vi trong ldng tu dien khdng co ddng dien
nen ddng dien dich va ddng dien din(chay trong
day din) bang nhau ve do ldn nhung nguoc
chieu.

<b>Cau 489: Phat bieu nao sau day ve dien ti truang</b>

la khong dung?

A Ti truang va dien truang co cac duang suc
la duang cong khep kin.

730.

Dien truang xoay va ti truang co cac

duang suc la duang cong khep kin.

731.

Mot ti truang bien thien theo thai gian

sinh ra mot dien truang bien thien d cac diem
lan can.

732.

Mot dien truang bien thien theo thai

gian sinh ra mot ti truang bien thien d cac diem
lan can.

<b>Cau 490: Phat bieu nao sau day la khdng dung?</b>

733.

Dien ti truang va ti truang deu tac dung

luc len dien tlch chuyen dong.

734.

Dien truang va ti truang deu tac dung

luc len dien tlch chuyen dong.

735.

Dien ti truang va dien truang deu tac

dung luc len dien tlch dung yen.

D Dien truang va ti truang deu tac dung luc
len dien tlch dung yen.

<b>Cau 491: Dat mot hop kln bang sat trong mot</b>

vung khong gian co dien ti truang. Trong hop
kln se

A. khdng co dien ti truang. B. co dien
truang.

C. cri ti truang.____________D. co dien ti
truang.

<b>( HUONG V. SONG AMI </b>
<b>SANG </b>

<b>A ---7"T</b>

<b>---7T</b>
<b>---1_.</b>

<b>Cau 492. Trong cac phat bieu sau day, phat bieu </b>

nao la sai.

736.

Anh sang trang la tong hop cua nhieu

anh sang dan sac co mau bien thien lien tuc ti do
tdi tlm.

737.

Anh sang dan sac la anh sang khong bi

tan sac khi di qua lang klnh.

738.

Hien tuong chum sang trang, khi di

qua mot lang kinh, bi tach ra thanh nhieu chum
sang ci mau sac khac nhau la hien tuong tan sac
anh sang.

D Anh sang do Mat Trai phat ra la anh sang
dan sac vi nri cri mau trang.

<b>Cau 493. Chon cau dung. Hien tuong tan sac </b>

xay ra:

739.

chi vdi lang knh thuy tinh.

740.

chi vdi cac lang knh chat ran

hoac long.

741.

d mat phan cach hai mdi
truang truyen sang khac nhau.

742.

d mat phan cach mot mdi truang ran

hoac long vdi chan khong (hoac khdng khl. .

<b>Cau 494.. Hien tuong tan sac xay ra do anh sang</b>

trang la mot hon hop cua nhieu anh sang dan
sac khac nhau va cdn do nguyen nhan nao dudi
day.

743.

lang knh bang thuy tinh.

744.

lang knh co goc chiet quang

qua ldn.

745.

lang knh khdng dat d goc

lech cuc tieu.

746.

chiet suat cua phu thuoc budc
song

<b>Cau 495. Nguyen nhan gay ra hien tuong tan sac</b>

anh sang mat trai trong thl nghiem cua Niutan la
A. thuy tinh da nhuom mau cho chum anh

sang mat trai.

747.

chiet suat cua lang knh dei vdi cac anh

sang dan sac la khac nhau.

748.

lang klnh co tac dung lam bien doi

mau chum anh sang mat trai.

749.

chum anh sang mat trai da bi nhieu

loan khi di qua lang kinh.

<b>Cau 496. T</b>U hien tuong tan sac va giao thoa anh

sang, ket luan nao sau day la dung khi noi ve
chiet suat cua mot mdi truang.

750.

Chiet suat cua mdi truang nhu nhau dei

vdi moi anh sang dan sac.

751.

Chiet suat cua mdi truang ldn dei vdi

nhung anh sang co budc song dai.

C Chiet suat cua mdi truang ldn dei vdi
nhung anh sang co budc song ngan.

D. Chiet suat cua mdi truang nho khi mdi
truang co nhieu anh sang truyen qua.

<b>Cau 497.. Tim phat bieu sai ve hientuong tan </b>

sac:

752.

Tan sac la hien tuong mot chum anh

sang trang hep bi tach thanh nhieu chum sang
dan sac khac nhau.

753.

Hien tuong tan sac chung to anh sang

</div>
<span class='text_page_counter'>(65)</span><div class='page_container' data-page=65>

C Thi nghiem cua Newton ve tan sac anh
sang chung to lang kinh la nguyen nhan cua
hien tuong tan sac.

D. Nguyen nhan cua hien tuong tan sac la do
chiet suat cua cac moi truang dei vdi cac anh
sang dan sac khac nhau thi khac nhau.

<b>Cau 498. T</b>U hien tuong tan sac va giao thoa anh

sang, ket luan nao sau day la dung khi noi ve
chiet suat cua mot mdi truang.

754.

Chiet suat cua mdi truang nhu nhau dei

vdi moi anh sang dan sac.

755.

Chiet suat cua mdi truang ldn dei vdi

nhung anh sang co budc song dai.

C Chiet suat cua mdi truang ldn dei vdi
nhung anh sang co budc song ngan.

D. Chiet suat cua mdi truang nho khi mdi
truang co nhieu anh sang truyen qua.

<b>Cau 499. Phat bieu nao dudi day sai, khi noi ve</b>

anh sang trang va dan sac:

756.

anh sang trang la tap hop cua vd se anh

sang dan sac khac nhau cri mau bien thien lien
tuc tu do den tlm.

757.

chiet suat cua chat lam lang knh dei
vdi cac anh sang dan sac khac nhau la nhu nhau.

758.

anh sang dan sac la anh sang khong bi

tan sac qua lang kinh.

D. Khi cac anh sang dan sac di qua mot mdi

truang trong

suet thi chiet suat cua mdi truang dei vdi anh

sang do la nho

nh£it, dei vdi anh sang tlm la ldn nhat.

<b>Cau 500. Chon cau dung. Mot chum anh sang</b>

dan sac, sau khi di qua lang knh thuy tinh thi:

759.

khong bi lech va khdng doi

mau.

760.

chi doi

mau ma khong

bi lech. C chi bi

</div>
<span class='text_page_counter'>(66)</span><div class='page_container' data-page=66>

<b>Cau 501. Phat bieu nao sau day la dung.</b>

761.

Trong thi nghiem cua Niutan ve anh
sang dan sac nham chung minh su ton tai cua
anh sang dan sac.

762.

Trong thi nghiem cua Niutan ve anh

sang dan sac nham chung minh lang klnh
khdng lam bien doi mau cua anh sang qua ni.

763.

Trong thi nghiem cua Niutan ve anh

sang dan sac nham chung minh anh sang mat
trai khdng phai la anh sang dan sac.

764.

Trong thi nghiem cua Niutan ve anh

sang dan sac nham chung minh du anh sang cri
mau gi thi khi di qua lang knh deu bi lech ve
pha day cua lang knh.

<b>Cau 502. Tim phat bieu dung ve anh sang dan </b>

sac:

765.

Dei vdi cac moi truang khac nhau, anh

sang dan sac luon cri cung budc sring.

766.

Dei vdi anh sang dan sac, gric lech cua

ta sang dei vdi cac lang kinh khac nhau deu cri
cung gia tri.

767.

Anh sang dan sac la anh sang khong bi

lech duang truyen khi di qua lang kinh.

768.

Anh sang dan sac la anh sang khong bi
tach mau khi qua lang kinh.

<b>Cau 503. Phat bieu nao sau day la dung.</b>

769.

Mot chum anh sang mat trai co dang

mot dai sang mong, hep roi xueng mat nudc
trong mot be nudc tao nen d day be mot vet
sang co mau trang du chieu ken hay chieu
vudng goc.

770.

Mot chum anh sang mat trai co dang

mot dai sang mong, hep roi xueng mat nudc
trong mot be nudc tao nen d day be mot vet
sang co nhieu mau du chieu Hen hay chieu
vudng goc.

771.

Mot chum anh sang mat trai co dang
mot dai sang mong, hep roi xueng mat nudc
trong mot be nudc tao nen d day be mot vet
sang co nhieu mau khi chieu xien va ci mau
trang khi chieu vudng goc

772.

Mot chum anh sang mat trai co dang

mot dai sang mong, hep roi xueng mat nudc
trong mot be nudc tao nen d day be mot vet
sang co nhieu mau khi chieu vudng goc va ci
mau trang khi chieu xien

<b>Cau 504. Chon phat bieu dung. Su phu thuoc</b>

cua chiet suat vao budc song

773.

xay ra vdi moi chat ran, long,
hoac khl.

774.

chi xay ra vdi chat ran va chat

long.

775.

chi xay ra vdi chat ran.

776.

la hien tuong dac trung cua

thuy tinh.

<b>Cau 505. Phat bieu nao sau day la khdng dung.</b>

Cho cac chum anh sang sau: Trang, do, vang
tim.

777.

anh sang trang bi tan sac khi

di qua lang knh.

778.

Chieu anh sang trang vao may quang

pho se thu duoc quang pho lien tuc.

C Moi chum anh sang tren deu co mot budc
song xac dinh.

D. anh sang tim bi lech ve pha day lang knh
nhieu nhat nen chiet suat cua lang knh dei vdi
<b>no ldn nhat. Cau 506. Phat bieu nao sau day la </b>
sai khi noi ve anh sang dan sac.

A Chiet suat cua mot mdi truang trong suet
dei vdi anh sang do ldn han chiet suat cua mdi
truang do dei vdi anh sang tlm.

779.

Anh sang dan sac la anh sang khong bi

tan sac khi di qua lang klnh.

780.

Trong cung mot mdi truang truyen,

van tec anh sang tlm nho han van tec anh sang
do.

781.

Trong chan khong, cac anh sang dan

sac khac nhau truyen di vdi cung van tec.

<b>Cau 507. Phat bieu nao sau day la dung.</b>

782.

Anh sang dan sac la anh sang bi tan

sac khi di qua lang kinh.

783.

Anh sang trang la hon hop cua vd se

anh sang dan sac co mau bien thien lien tuc tu
do den tlm.

784.

Chi co anh sang trang mdi bi tan sac

khi truyen qua lang kinh.

785.

Tong hop cac anh sang dan sac se ludn

duoc anh sang trang.

<b>Cau 508. Khi mot chum anh sang dan sac</b>

truyen ti moi truang cri chiet suat nL = 1,6 vao

moi truang cri chiet suat
4

n2 = — thi:

786.

Tan se tang, budc sring giam;

</div>
<span class='text_page_counter'>(67)</span><div class='page_container' data-page=67>

788.

Tan se khong doi, budc sing
giam;

789.

Tan se khong doi, budc sing
tang;

<b>Cau 509. Trong thi nghiem giao thoa anh sang </b>

trang cua Young tren man quan sat thu duoc

hinh anh giao thoa gom: A Chinh giua la vach

sang trang, hai ben cri nhung dai mau.

790.

Mot dai mau cau vong bien

thien lien tuc tu do den tlm.

791.

Cac vach sang va tei xen ke

cach deu nhau

792.

Chinh giua la vach sang trang, hai ben

ci nhung dai mau cach deu nhau.

<b>Cau 510. Nrii ve giao thoa anh sang, tim phat </b>

bieu sai.

793.

Hien tuong giao thoa anh sang chi giai

thich duoc bang su giao thoa cua hai sing ket
hop.

794.

Hien tuong giao thoa anh sang la mot

bang chung thuc nghiem quan trong khang dinh

anh sang cri tinh chat sring.

795.

Trong mien giao thoa, nhung vach

sang ung vdi nhung cho hai sring gap nhau tang
cuang lin nhau.

D Trong mien giao thoa, nhung vach tei ung
vdi nhung cho hai sring tdi khong gap duoc
nhau.

<b>Cau 512. Trong thi nghiem Young ve giao thoa</b>

anh sang vdi hai khe S1, S2, neu dat mot ban mat

song song trudc S1, tren duang di cua anh sang

thi . . .

796.

he van giao thoa khong thay

doi.

797.

he van giao thoa dai ve phia
SL.

798.

he van giao thoa dai ve phia

S2.

799.

Van trung tam lech ve phia

S2.

<b>Cau 513. De hai song cung tan se truyen theo</b>

mot chieu giao thoa duoc vdi nhau, thi chung
phai co dieu kien nao sau day.

800.

Cung bien do va cung pha.

801.

Hieu se pha khdng doi theo
thai gian.

802.

Cung bien do va nguoc pha.

803.

Cung bien do va hieu se pha

</div>
<span class='text_page_counter'>(68)</span><div class='page_container' data-page=68>

<b>Cau 514. trong cac thi nghiem sau day, thl</b>

nghiem nao ci the dung de do budc song anh
sang

804.

Thi nghiem tan sac anh sang

cua Niu-tan.

805.

Thi nghiem tong hop anh

sang trang.

C Thi nghiem giao thoa anh sang vdi khe
Young

<b>D. Thi nghiem ve anh sang dan sac. Cau 515.</b>
Chieu anh sang trang do mot nguon nong sang
phat ra vao khe hep F cua mot may quang pho
lang knh thi tren tam kinh anh cua buong anh se
thu duoc

806.

anh sang trang

807.

mot dai co mau ti do den tlm nei lien
nhau mot cach lien tuc.

808.

cac vach mau sang, tei xen ke

nhau.

809.

bay vach sang ti do den tlm, ngan cach

nhau bang nhung khoang tei.

<b>Cau 516.. Chon cau dung. May quang pho cang</b>

tet, neu chiet suat cua chat lam lang knh:

810.

cang ldn.

811.

Bien thien cang cham theo

budc song anh sang.

812.

Cang nho.

813.

Bien thien cang nhanh theo budc song
anh sang. <b>Cau 517. Quang pho lien tuc duoc </b>

phat ra khi nao.

814.

Khi nung nring chat ran, chat

long, chat khl.

815.

Khi nung nring chat ran, chat long,
chat khl co khei luong rieng ldn.

816.

Khi nung nring chat ran va

chat long.

817.

Khi nung ning chat ran.

<b>Cau 518. Khi tang nhiet do cua day toc bong</b>

dien, thi quang pho cua anh sang do no phat ra
thay doi the nao.

818.

Sang dan len, nhung vin chua

du bay mau nhu cau vong.

819.

Ban chi co mau do, sau do lan luot co

them mau vang, cuei cung khi nhiet do cao, mdi
co du bay mau chu khong sang them.

C Via sang tang dan, via trai rong dan, tu
mau do, qua cac mau da cam, vang... cuei cung,
khi nhiet do cao mdi co du bay mau.

<b>D. Hoan toan khdng thay doi gi. Cau 519. </b>
Deu nao sau day la sai khi nrii ve quang pho
lien tuc.

820.

Quang pho lien tuc khdng phu thuoc

vao thanh phan cau tao cua nguon sang.

821.

Quang pho lien tuc phu thuoc vao

nhiet do cua nguon sang.

C Quang pho lien tuc la nhung vach mau
rieng biet hien tren mot nen tei.

D. Quang pho lien tuc do cac vat ran, long
hoac khl co ti khei ldn khi bi nung nong phat ra.

<b>Cau 520. Phat bieu nao sau day la khdng dung.</b>

822.

Trong may quang pho thi eng chuan

truc co tac dung tao ra chum ta sang song song.

823.

Trong may quang pho thi buong anh

nam d pha sau lang kinh.

C. Trong may quang pho thi lang knh co tac
dung phan tlch chum anh sang phuc tap song
song thanh cac chum sang dan sac song song.

D Trong may quang pho thi quang pho cua
mot chum sang thu duoc trong buong anh cua
may la mot dai sang co mau cau vong.

<b>Cau 521. Phat bieu nao sau day la dung.</b>

824.

Chum tia sang li ra khoi lang klnh cua

may quang pho trudc khi di qua thau knh cua
buong anh la mot chum ta phan ky co nhieu
mau khac nhau.

825.

Chum ta sang lri ra khoi lang kinh cua
may quang pho trudc khi di qua thau knh cua
buong anh la tap hop gom nhieu chum ta sang
song song, moi chum mot mau co hudng khdng
trung nhau

826.

Chum tia sang li ra khoi lang klnh cua

may quang pho trudc khi di qua thau knh cua
buong anh la mot chum ta phan ky mau trang.

827.

Chum tia sang li ra khoi lang klnh cua

may quang pho trudc khi di qua thau knh cua
buong anh la mot chum tia sang mau song song.

<b>Cau 522. Chon cau dung.</b>

828.

Quang pho lien tuc cua mot vat phu

thuoc vao ban chat cua vat

829.

Quang pho lien tuc phu thuoc vao
nhiet do cua vat nong sang

830.

Quang pho lien tuc khdng phu thuoc

vao nhiet do va ban chat cua vat

831.

Quang pho lien tuc phu thuoc ca nhiet

do va ban chat cua vat

<b>Cau 523. Quang pho lien tuc phat ra bdi hai vat</b>

</div>
<span class='text_page_counter'>(69)</span><div class='page_container' data-page=69>

832.

Hoan toan khac nhau d moi
nhiet do

833.

Hoan toan gieng nhau d moi

nhiet do

834.

Gieng nhau neu moi vat co
mot nhiet do thlch hop

835.

Gieng nhau neu hai vat co

nhiet do bang nhau

<b>Cau 524. Phat bieu nao sau day la dung khi cho</b>

anh sang trang chieu vao may quang pho.

836.

Chum tia sang lri ra khoi lang knh cua

may quang pho trudc khi di qua thau knh cua
buong anh la mot chum tia phan ky co nhieu
mau khac nhau.

837.

Chum tia sang li ra khoi lang klnh cua
may quang pho trudc khi di qua thau klnh cua
buong anh gom nhieu chum tia sang dan sac
song song.

838.

Chum tia sang li ra khoi lang klnh cua

may quang pho trudc khi di qua thau knh cua
buong anh la mot chum tia phan ky mau trang.

839.

Chum tia sang li ra khoi lang klnh cua

may quang pho trudc khi di qua thau knh cua
buong anh la mot chum tia sang mau song song.

<b>Cau 525. Tim phat bieu sai. Quang pho lien tuc..</b>

•

840.

la mot dai sang ci mau sac bien thien

lien tuc ti do den tim.

841.

do cac vat ran bi nung ning

</div>
<span class='text_page_counter'>(70)</span><div class='page_container' data-page=70>

842.

do cac chat long va khi ci ti khe i ldn
khi bi nung ning phat ra.

843.

duoc hinh thanh do cac dam hai nung

ning. Cau 526. Dac diem cua quang pho lien tuc

la ...

844.

phu thuoc vao thanh phan cau

tao cua nguon sang.

845.

khong phu thuoc vao thanh
phan cau tao cua nguon sang.

846.

khong phu thuoc vao nhiet do

cua nguon sang.

847.

Phu thuoc vao nhiet do va thanh phan

cau tao cua nguon sang

<b>Cau 527. Phat bieu nao sau day sai ?</b>

848.

Ci hai loai quang pho vach: quang pho

vach hap thu va quang pho vach phat xa.

849.

Quang pho vach phat xa cri nhung

vach mau rieng le nam tren nen tei.

850.

Quang pho cua anh sang mat trai thu
duoc tren trai dat la quang pho lien tuc.

851.

Quang pho vach phat xa do cac khi

hay hai d ap suat thap bi kich thich phat ra.

<b>Cau 528.. Quang pho lien tuc cua mot nguon </b>

sang J

852.

phu thuoc vao ca thanh phan cau tao

va nhiet do cua nguon sang J.

853.

khong phu thuoc vao ca thanh phan

cau tao va nhiet do cua nguon sang J.

854.

khong phu thuoc thanh phan cau tao
cua nguon sang J, ma chi phu thuoc vao nhiet
do cua nguon sang do.

855.

khong phu thuoc vao nhiet do cua

nguon sang J, ma chi phu thuoc thanh phan cau
tao cua nguon sang do.

<b>Cau 529. Quang pho lien tuc</b>

856.

phu thuoc vao nhiet do cua nguon phat
ma khong phu thuoc vao ban chat cua nguon
phat.

857.

phu thuoc vao ban chat va

nhiet do cua nguon phat.

858.

khong phu thuoc vao ban

chat va nhiet do cua nguon phat.

859.

phu thuoc vao ban chat cua nguon

phat ma khong phu thuoc vao nhiet do cua
nguon phat.

<b>Cau 530. Phat bieu nao sau day la dung.</b>

860.

Tia hong ngoai la la mot buc

xa dan sac co mau hong.

861.

Tia hong ngoai la song dien tu co budc

song nho han 0,4 am.

C Tia hong ngoai do cac vat co nhiet do cao
han nhiet do mdi truang xung quanh phat ra.

D. Tia hong ngoai bi lech trong dien truang
<b>va tu truang. Cau 531. Phat bieu nao sau day la </b>
khdng dung.

862.

Tia hong ngoai do cac vat bi

nung nong phat ra.

863.

Tia hong ngoai la song dien tu co budc

song ldn han 0,76 pm.

C Tia hong ngoai co tac dung len moi knh anh.

D. Tia hong ngoai mat nguai khdng nhin thay
<b>duoc. Cau 532. Phat bieu nao sau day la dung.</b>

864.

Tia hong ngoai co kha nang

dam xuyen rat manh.

865.

Tia hong ngoai co the klch thlch cho

mot se chat phat quang.

866.

Tia hong ngoai chi duoc phat ra ti cac

vat bi nung nong cri nhiet do tren 5000_C.

D Tia hong ngoai mat nguai khdng nhin thay
duoc. <b>Cau 533. Phat bieu nao sau day la khdng </b>

dung.

867.

Tia hong ngoai va tia tu ngoai deu co

cung ban chat la song dien tu.

868.

Tia hong ngoai co budc song
nho han tia tu ngoai.

869.

Tia hong ngoai va tia tu ngoai deu la

nhung buc xa khdng nhin thay.

870.

Tia hong ngoai va tia tu ngoai deu co

<b>tac dung nhiet Cau 534. Tia hong ngoai la </b>
nhung buc xa co

A ban chat la song dien tu.

871.

kha nang ion hoa manh

khdng khl.

872.

kha nang dam xuyen manh, co the

xxuyen qua ldp chi day co cm.

873.

budc song nho han budc song

cua anh sang do.

<b>Cau 535. Khi nii ve tia hong ngoai, phat bieu</b>

nao dudi day la sai.

874.

Tia hong ngoai cung co the bien dieu

duoc nhu song dien ti cao tan.

875.

Tia hong ngoai co kha nang gay ra mot

se phan ung hoa hoc.

</div>
<span class='text_page_counter'>(71)</span><div class='page_container' data-page=71>

<b>Cau 536. Chon phat bieu dung Tac dung noi bat</b>

cua tia hong ngoai la:

A. duoc quang dien. B. Tac dung quang
hoc.

C Tac dung nhiet. D. Tac dung
hoa hoc

<b>Cau 537. Than the con nguai d nhiet do 37</b>0_C

phat ra nhung buc xa sau:

A. Tia X. B. Buc xa nhin

thay.

C Tia hong ngoai. D. Tiatu ngoai.

<b>Cau 538. Khi nii ve tia hong ngoai, phat bieu</b>

nao sau day la sai.

876.

Tia hong ngoai co ban chat la

song dien ti.

877.

Cac vat d nhiet do tren
20000_{C chi phat ra tia hong ngoai.}

878.

Tia hong ngoai co tan se nho

han tan se cua anh sang tlm.

879.

Tac dung noi bat cua tia hong ngoai la

<b>tac dung nhiet. Cau 539. Chon cau sai.</b>

880.

Tia hong ngoai do cac vat bi

nung ning phat ra.

881.

Tia hong ngoai lam phat
quang mot se chat.

882.

Tac dung noi bac nhat cua tia

hong ngoai la tac dung nhiet.

883.

Budc sring cua tia hong ngoai ldn han

<b>0,75pm. Cau 540. Cri the nhan biet tia hong </b>
ngoai bang ...

A. man huynh quang B.

quang pho ke

C. mat nguai

D pin nhiet dien

<b>Cau 541. Tim phat bieu sai ve tia hong ngoai.</b>

884.

Tia hong ngoai ci ban chat la

sing dien ti .

885.

Tia hong ngoai kich thich thi giac lam
cho ta nhin thay mau hong.

886.

Vat nung ning d nhiet do thap chi phat

ra tia hong ngoai. Nhiet do cua vat tren 500o_C

</div>
<span class='text_page_counter'>(72)</span><div class='page_container' data-page=72>

D. Tia hong ngoai nam ngoai vung anh sang
kha kien, budc sring cua tia hong ngoai dai han
<b>budc sring cua anh do. Cau 542. Chon cau sai. </b>
Tinh chat va tac dung cua tia hong ngoai la:

A. Gay ra hieu ung quang dien d mot se chat
ban din.

D Gay ra cac phan ung quang hoa, quang
hop.

887.

Tac dung noi bac la tac dung nhiet.

888.

Tac dung len mot loai kinh anh dac

biet goi la kinh anh hong ngoai.

<b>Cau 543. Tia tu ngoai duoc dung </b>A de tim vet
nut tren be mat san pham bang km loai.

889.

trong y te de chup dien, chieu dien.

890.

de chup anh be mat Trai Dat tu ve tinh.

891.

de tim khuyet tat ben trong san pham

<b>bang kim loai. Cau 544. Khi nrii ve tia tu ngoai, </b>
phat bieu nao dudi day la sai.

892.

Tia tu ngoai co tac dung manh len kinh

anh.

C Tia tu ngoai co budc song ldn han budc
song cua anh sang tim.

893.

Tia tu ngoai co ban chat la song dien ti.

D. Tia tu ngoai bi thuy tinh hap thu manh va
lam ion hoa khong khi.

<b>Cau 545. Phat bieu nao sau day la dung.</b>

894.

Tia tu ngoai la buc xa do vat co khei

luong rieng ldn bi kich thich phat ra.

895.

Tia tu ngoai la mot trong nhung buc xa

ma mat nguai co the thay duoc.

C Tia tu ngoai khdng bi thach anh hap thu. D.
<b>Tia tu ngoai khdng co tac dung diet khuan. Cau </b>

<b>546. Phat bieu nao sau day la khdng dung.</b>

896.

Tia tu ngoai co tac dung sinh ly.

897.

Tia tu ngoai co the klch thlch cho mot

se chat phat quang

898.

Tia tu ngoai co tac dung

manh len kinh anh. D Tia tu

ngoai co khdng kha nang dam
xuyen.

<b>Cau 547. Phat bieu nao sau day la khdng dung.</b>

899.

Vat co nhiet do tren 30000_{C phat ra tia}

tu ngoai rat manh.

900.

Tia tu ngoai khdng bi thuy tinh hap
thu.

901.

Tia tu ngoai la song dien ti co budc

song nho han budc sring cua anh sang do.

902.

Tia tu ngoai co

<b>tac dung nhiet. Cau 548. </b>

Phat bieu nao sau day la
dung.

903.

Tia hong ngoai co tan se ldn han tan se

cua tia sang vang.

904.

Tia tu ngoai co budc song ldn han

budc song cua tia sang
do.

C Buc xa tu ngoai co tan se ldn han tan se
cua buc xa hong ngoai.

D. Tia tu ngoai ci ban chat la sing dien ti vdi
budc sing ngan han budc sring anh sang tim.

<b>Cau 549. Dieu nao sau day la sai khi so sanh tia</b>

hong ngoai vdi tia tu ngoai.

905.

Cung ban chat la song dien tu.

906.

Tia hong ngoai cua budc song nho hai
tia tu ngoai.

907.

Tia hong ngoai va tia tu ngoai deu tac

dung len kinh anh.

D. Tia hong ngoai va tia tu ngoai deu khdng
nhin thay bang mat thuang.

<b>Cau 550. Tia tu ngoai duoc phat ra rat manh tu</b>

nguon nao sau day.

A. Ld sudi dien. B. Ho quang

dien.

C. Ld vi sing. D. Man hinh vo

tuyen.

<b>Cau 551. Tim phat bieu sai ve tia tu ngoai.</b>

908.

Tia tu ngoai ci ban chat la sing dien ti

vdi budc sing ngan han budc sring anh sang tim.

909.

Buc xa tu ngoai nam giua dai tim cua

anh sang nhin thay va tia X cua thang sring dien
tu.

C Tia tu ngoai rat nguy hiem, nen can cri cac
bien phap de phdng tranh.

D. Cac vat nung ning tren 3000o_{C phat ra tia}

tu ngoai rat

manh.

<b>Cau 552. Tim phat bieu sai ve tia tu ngoai.</b>

A Mat Trai chi phat ra anh sang nhin thay va

tia hong ngoai nen ta trong thay sang va cam
giac am ap.

910.

Thuy tinh va nudc la trong

suet dei vdi tia tu ngoai.

911.

Den day tric nring sang den 2000o_{C la}

nguon phat ra tia tu ngoai.

912.

Cac ho quang dien vdi nhiet do tren

4000o_{C thuang duoc dung lam nguon tia tu}

</div>
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<b>Cau 553. Tim phat bieu sai ve tac dung va cong</b>

dung cua tia tu ngoai: Tia tu ngoai ...

913.

ci tac dung rat manh len kinh

anh.

914.

cri the gay ra cac hieu ung

quang hoa, quang hop.

915.

cri tac dung sinh hoc, huy diet

te bao, khu trung

D trong cong nghiep duoc dung de say kho
cac san pham nong - cong nghiep.

<b>Cau 554.. Buc xa co budc song trong khoang tu</b>

10-9_{m den 4.10}-7_{m thuoc loai nao trong cac loai}

song dudi day.

A. Tia X.. B. anh sang

nhin thay.

C. Tia hong ngoai.. D Tia tu ngoai.

<b>Cau 555. Tia tu ngoai khdng co tac dung nao </b>

sau day.

A. Quang dien. B. Chieu sang.

C. Kich thich su phat quang. D. Sinh li.

<b>Cau 556. Quang pho vach phat xa la quang pho</b>

co dac diem gi sau day.

916.

Chua cac vach cung do sang, mau sac

khac nhau, dat cach deu dan tren quang pho.

917.

Gom toan vach sang dat nei

tiep nhau tren quang pho.

C Chua mot se (lt hoac nhieu. vach mau sac
khac nhau xen ke nhung khoang tei.

D. Chi chua mot se rat lt cac vach mau.

<b>Cau 557. Quang pho vach duoc phat ra khi nao.</b>

918.

Khi nung nring mot chat ran,

long hoac khl.

919.

Khi nung nring mot chat long

hoac khl.

D Khi nung nring mot chat khl d ap suat
thap.

920.

Khi nung nring mot chat khl

d dieu kien tieu chuan.

<b>Cau 558.. Chon cau dung. Quang pho vach phat</b>

</div>
<span class='text_page_counter'>(74)</span><div class='page_container' data-page=74>

921.

thanh phan hoa hoc cua chat
ay.

922.

cau tao phan tu cua chat ay.

923.

thanh ph<an nguyen te cua
chat ay.

<b>Cau 559. Chon cau dung. Su dao (hay dao sac)</b>

vach quang pho la:

924.

su dao nguoc, tu vi trl nguoc chieu khe

may thanh cung chieu.

925.

Su dao nguoc trat tu cac vach

quang pho.

926.

su chuyen mot sang thanh vach tei tren
nen sang, do bi hap thu.

927.

Su thay doi mau sac cac vach

quang pho.

<b>Cau 560. Phat bieu nao sau day la sai khi noi ve</b>

quang pho vach phat xa

928.

Quang pho vach phat xa bao gom mot

he theng nhung vach mau rieng re nam tren mot
nen t6i.

929.

Quang pho vach phat xa bao gom mot
he theng nhung dai mau bien thien lien tuc nam
tren mot nen t6i.

930.

Moi nguyen te hoa hoc d nhung trang

thai khl hay hai nong sang dudi ap xuat thap
cho mot quang pho vach rieng, dac trung cho
nguyen te do.

931.

Quang pho vach phat xa cua cac

nguyen te khac nhau la rat khac nhau ve se
luong cac vach, ve budc song (tuc la vi trl cac
vach. va cuang do sang cua cac vach do.

<b>Cau 561. Phat bieu nao sau day la khdng dung.</b>

932.

Quang pho vach phat xa cua cac

nguyen te khac nhau thi khac nhau ve se luong
vach mau, mau sac vach, vi trl va do sang ti dei
cua cac vach quang pho

933.

Moi nguyen te hoa hoc d trang thai khl

hay hai d ap suat thap duoc kch thlch phat sang
co mot quang pho vach phat xa dac trung

934.

Quang pho vach phat xa la nhung dai
mau bien doi lien tuc nam tren mot nen t6i

935.

Quang pho vach phat xa la mot he

theng cac vach sang mau nam rieng re tren mot
nen t6i

<b>Cau 562. De thu duoc quang pho vach hap thu </b>

thi

936.

Nhiet do cua dam khl hay hai hap thu

phai ldn han nhiet do cua nguon sang trang

937.

Nhiet do cua dam khl hay hai hap thu
phai nho han nhiet do cua nguon sang trang

938.

Nhiet do cua dam khl hay hai hap thu

phai bang nhiet do cua nguon sang trang

939.

ap suat cua dam khl hap thu

phai rat ldn

<b>Cau 563. Tim phat bieu sai: Hai nguyen te khac</b>

nhau ci dac diem quang pho vach phat xa khac
nhau ve...

940.

do sang ti de i giua cac vach

quang pho;

941.

be rong cac vach quang pho;

942.

se luong cac vach quang pho;

943.

mau sac cac vach va

<b>vi tri cac vach mau. Cau 564.. </b>
Phep phan tch quang pho la

944.

Phep phan tch mot chum

sang nha hien tuong tan sac

945.

Phep phan tch thanh phan cau tao cua
mot chat dua tren viec nghien cuu quang pho do
no phat ra

946.

Phep do nhiet do cua mot vat dua tren

quang pho do vat phat ra

947.

Phep do van tec va budc song cua anh

sang tu quang pho thu duoc

<b>Cau 565.. Khang dinh nao sau day la dung.</b>

A Vi trl vach tei trong quang pho hap thu cua
mot nguyen te trung vdi vi trl vach sang mau
trong quang pho vach phat xa cua nguyen te do

948.

Trong quang pho vach hap

thu cac van tei cach deu nhau

949.

Trong quang pho vach phat xa cac van

sang va cac van tei cach deu nhau

950.

Quang pho vach cua cac nguyen te

hoa hoc deu gieng nhau d cung mot nhiet do.

<b>Cau 566. Phat bieu nao sau day la khdng dung.</b>

951.

Quang pho vach phat xa cua cac

nguyen te khac nhau thi khac nhau ve se luong
vach mau, mau sac vach, vi trl va do sang ti dei

cua cac vach quang pho

952.

Moi nguyen te hoa hoc d trang thai khl

hay hai d ap suat thap duoc kch thlch phat sang
co mot quang pho vach phat xa dac trung

C Quang pho vach phat xa la nhung dai mau
bien doi lien tuc nam tren mot nen t6i

</div>
<span class='text_page_counter'>(75)</span><div class='page_container' data-page=75>

953.

Nhiet do cua dam khl hay hai hap thu
phai ldn han nhiet do cua nguon sang trang

954.

Nhiet do cua dam khl hay hai hap thu
phai nho han nhiet do cua nguon sang trang

955.

Nhiet do cua dam khl hay hai hap thu

phai bang nhiet do cua nguon sang trang

956.

Ap suat cua dam khl hap thu

phai rat ldn

<b>Cau 568. Phat bieu nao sau day la dung khi noi </b>

ve quang pho.

957.

Quang pho lien tuc cua nguon sang

nao thi phu thuoc thanh phan cau tao cua nguon
sang ay.

958.

Moi nguyen te hoa hoc d trang thai khl
hay hai nong sang dudi ap suat thap cho mot
quang pho vach rieng, dac trung cho nguyen te
do.

959.

De thu duoc quang pho hap thu thi

nhiet do cua dam khl hay hai hap thu phai cao
han nhiet do cua nguon sang phat ra quang pho
lien tuc.

960.

Quang pho hap thu la quang pho cua

anh sang do mot vat ran phat ra khi vat do duoc
nung nong.

<b>Cau 569. Quang pho vach phat xa</b>

961.

cua cac nguyen te khac nhau, d cung

mot nhiet do thi nhu nhau ve do sang ti dei cua
cac vach.

962.

la mot he theng nhung vach sang (vach
mau) rieng le, ngan cach nhau bdi nhung
khoang tei.

963.

do cac chat ran, chat long hoac chat

khl co ap suat ldn phat ra khi bi nung nong.

964.

la mot dai co mau tu do den tlm nei

lien nhau mot cach lien tuc.

</div>
<span class='text_page_counter'>(76)</span><div class='page_container' data-page=76>

<b>Cau 570. Phat bieu nao sau day la dung khi nrii </b>

ve tia X.

A Tia X la mot loai song dien ti co budc
song ngan han ca budc song cua tia tu ngoai.

965.

Tia X la mot loai song dien ti phat ra ti

nhung vat bi nung nong den nhiet do khoang

5000_C.

966.

Tia X khong cri kha nang

dam xuyen.

967.

Tia X duoc phat rati den dien.

<b>Cau 571. Tia X duoc tao ra bang cach nao sau </b>

day.

A Cho mot chum electron nhanh ban vao
mot km loai kho nring chay co nguyen tu luong
ldn.

968.

Cho mot chum electron cham

ban vao mot km loai.

969.

Chieu tia tu ngoai vao kim

loai co nguyen tu luong ldn.

970.

Chieu tia hong ngoai vao mot

kim loai.

<b>Cau 572.. Tinh chat nao sau day khdng phai la</b>

dac diem cua tia
X.

971.

Huy te bao.

972.

Gay ra hien tuong quang

dien.

973.

lam ion hoa khong khi.

D Xuyen qua tam chi day hang cm. <b>Cau 573.</b>

Phat bieu nao sau day la dung. Tlnh chat quan
trong nh£it cua tia X, phan biet no vdi cac song
dien ti khac la:

974.

tac dung len kinh anh.

975.

kha nang ion hoa chat khl.

976.

Tac dung lam phat

quang nhieu chat. D Kha

nang dam xxuyen qua vai,
go, gray...

<b>Cau 574. Phat bieu nao sau day la dung. Tia X </b>

la song dien ti co budc song: A ngan han ca

budc song cuatiatu ngoai.

977.

dai han tia tu ngoai.

978.

khdng do duoc vi khong gay

ra hien tuong giao thoa.
D. nho qua

khdng do
duoc.

<b>Cau 575. </b>

Chon cau sai

979.

Tia X cri kha nang xxuyen

qua mot la nhdm mong.

980.

Tia X ci tac dung manh len

kinh anh.

C Tia X la buc xa co the trdng thay duoc vi
nri lam cho mot se chat phat quang

D. Tia X la buc xa co hai dei vdi suc khoe
<b>con nguai. Cau 576.. Phat bieu nao sau day la </b>
khdng dung.

981.

Tia X va tia tu ngoai deu co

ban chat la song dien tu.

982.

Tia X va tia tu ngoai deu tac

dung manh len kinh anh.

983.

Tia X va tia tu ngoai deu klch thlch

mot se chat phat quang.

D Tia X va tia tu ngoai deu bi lech khi di qua
mot dien truang manh.

<b>Cau 577. Tia X duoc tao ra bang cach nao sau </b>

day.

984.

Cho mot chum electron nhanh ban vao
mot kim loai kho nring chay co nguyen tu luong
ldn.

985.

Cho mot chum electron cham

ban vao mot kim loai.

986.

Chieu tia tu ngoai vao kim

loai co nguyen tu luong ldn.

987.

Chieu tia hong ngoai

<b>vao mot kim loai. Cau 578. </b>
Phat bieu nao sau day la khdng
dung.

988.

Tia tu ngoai co tac dung sinh

ly.

989.

Tia tu ngoai co the kch thlch

cho mot se chat phat quang

C. Tia tu ngoai co tac dung manh len kinh
anh.

D Tia tu ngoai co khdng kha nang dam
xxuyen. <b>Cau 579. Tia tu ngoai va tia Ranghen </b>

deu co ban chat la sring dien tu, co budc song
dai ngan khac nhau nen

990.

chung bi lech khac nhau

trong tu truang deu.

991.

cri kha nang dam xxuyen
khac nhau.

992.

chung bi lech khac nhau

trong dien truang deu.

993.

chung deu duoc su dung trong y te de

</div>
<span class='text_page_counter'>(77)</span><div class='page_container' data-page=77>

ung dung cua tia Ranghen, chon cau phat bieu

dung: Tia Ranghen ...

994.

cri tac dung nhiet manh, cri the dung

de say kho hoac sudi am.

995.

chi gay ra hien tuong quang dien cho

cac te bao quang dien cri catet lam bang kim
loai kiem.

C khong di qua duoc ldp chi day vai mm,
nen nguai ta dung chi de lam man chrin bao ve
trong la thuat dung tia Ranghen

D. khong tac dung len kinh anh, khong lam
hong cuon phim anh khi chung chieu vao.

<b>Cau 581. Mot dai song dien ti trong chan khdng </b>

co tan se ti 4,0.1014_{Hz den 7,5.10}14_{Hz. Biet}

van tec anh sang trong chan khong c=3.108_m/s.

Dai song tren thuoc vung nao trong thang song
dien tu. A. Vung tia Ranghen. B. Vung tia tu
ngoai.

996.

Vung anh sang nhin thay. D. Vung tia
<b>hong ngoai. Cau 582. Khi nrii ve quang pho, </b>

phat bieunao sau day la dung.

997.

Cac chat ran bi nung nong thi

phat ra quang pho vach.

998.

Moi nguyen te hoa hoc co mot quang
pho vach dac trung cua nguyen te ay.

999.

Cac chat khl d ap suat ldn bi nung

nong thi phat ra quang pho vach.

1000.

Quang pho lien tuc cua
nguyen te nao thi dac trung cho nguyen te do.

<b>Cau 583. Phat bieu nao sau day la dung .</b>

1001.

Chat khl hay hai d ap suat

thap duoc kch thlch bang nhiet hay bang dien
cho quang pho lien tuc.

1002.

Chat khl hay hai duoc kch

thlch bang nhiet hay bang dien luon cho quang
pho vach.

1003.

Quang pho lien tuc cua
nguyen te nao thi dac trung cho nguyen te ay.

D Quang pho vach cua nguyen te nao thi dac
trung cho nguyen te ay.

<b>Cau 584. Trong chan khong, cac buc xa duoc</b>

sap xep theo thu tu budc song giam dan la:

A tia hong ngoai, anh sang tlm, tia tu ngoai,
tia Ran-ghen.

1004.

tia hong ngoai, anh sang tlm,
tia Ran-ghen, tia tu ngoai.

1005.

anh sang tim, tia hong ngoai,
tia tu ngoai, tia Ran-ghen.

1006.

tia Ran-ghen, tia tu ngoai, anh sang
<b>tlm, tia hong ngoai. Cau 585. Trong cac loai tia: </b>
Ran-ghen, hong ngoai, tu ngoai, dan sac mau
luc. tia co tan se nho nhat la

A. tia tu ngoai. B. tia hong

ngoai.

</div>
<span class='text_page_counter'>(78)</span><div class='page_container' data-page=78>

<b>Cau 586. Trong cac nguon buc xa dang hoat</b>

dong: ho quang dien, man hinh may vo tuyen,
ld sudi dien, ld vi sing. nguon phat ra tia tu

ngoai manh nhat la

A. man hinh may vo tuyen. B. ld vi sing.

C. ld sudi dien. D ho quang

dien.

<b>Cau 587: Dieu nao sau day sai khi nrii ve quang </b>

pho vach?

1007.

O cung nhiet do ap suat
quang pho vach moi nguyen te deu nhu nhau

1008.

Quang pho vach cua mot
nguyen te gom cac vach mau rieng re nam tren
mot nen t6i

1009.

Quang pho vach cua cac
nguyen te khac nhau la khac nhau

1010.

Mot chat khl hoac hai bi ddng
dien phong qua thi phat ra quang pho vach

<b>Cau 588. Nrii ve dac diem cua tia tu ngoai, chon</b>

cau phat bieu sai: Tia tu ngoai . . .

1011.

bi hap thu bdi tang ozon cua

khi quyen Trai Dat.

1012.

lam ion hoa khong khi.

1013.

lam phat quang mot se chat.

1014.

trong sue t de i vdi thuy tinh,
nudc.

<b>Cau 589. Chon cau sai. Dung phuang phap ion</b>

hoa cri the phat hien ra buc xa . . .

A tia tu ngoai B. tia X mem

C. tia X cung D. Tia gamma

<b>Cau 590. Chon cau sai. De phat hien ra tia tu</b>

ngoai, ta ci the dung cac phuang tien .

1015.

mat nguai quang sat binh
thuang.

1016.

man hinh huynh quang.

1017.

cap nhiet dien

1018.

te bao quang dien.

<b>Cau 591 . Quan sat nhung nguai tho han dien,</b>

khi lam viec ho thuang dung mat na ci tam kinh
tim de che mat. Ho lam nhu vay la de :

A tranh lam cho da tiep xuc truc tiep vdi tia
tu ngoai va cheng lria mat.

1019.

che ng buc xa nhiet la hong
da mat.

1020.

cheng ham luong ldn tia hong
ngoai tdi mat, cheng lia mat.

1021.

ngan chan tia X chieu tdi mat
la hong mat.

<b>Cau 592. Cac mat den hinh cua vo tuyen truyen</b>

hinh duoc che tao rat day. Viec che tao dri la do
nguyen nhan ca ban nao dudi

day?

1022.

Tranh bi va.

1023.

Chan cac tia X tranh nguy

hiem cho nguai ngoi trudc may.

1024.

Cheng lria mat cho nguai
xem.

1025.

Che ng su toa nhiet khi
electron tdi dap vao man huynh quang.

<b>Cau 593. Cac buc xa co budc song trong khoang</b>

tu 3.10-9_{m den 3.10}-7_{m la}

A. tia tu ngoai. B. anh sang
nhin thay.

C. tia hong ngoai. D. tia Ranghen.

<b>Cau 594. Tia Ranghen co</b>

1026.

cung ban chat vdi song am.

1027.

budc song ldn han budc song

cua tia hong ngoai. C cung ban chat vdi song

vd tuyen.

D. dien tlch am.

<b>Cau 595. Phat bieu nao sau day la sai khi nrii ve</b>

anh sang dan sac?

A Chiet suat cua mot mdi truang trong suet
dei vdi anh sang do ldn han chiet suat cua mdi
truang do dei vdi anh sang tlm.

1028.

Anh sang dan sac la anh sang

khong bi tan sac khi di qua lang klnh.

1029.

Trong cung mot mdi truang

truyen, van tec anh sang tlm nho han van tec
anh sang do.

1030.

Trong chan khdng, cac anh

sang dan sac khac nhau truyen di vdi cung van
tec.

<b>Cau 596. Chieu xien mot chum sang hep gom</b>

hai anh sang dan sac la vang va lam tu khdng
khl tdi mat nudc thi

1031.

chum sang bi phan xa toan
phan.

1032.

so vdi phuang tia tdi, tia khuc
xa vang bi lech lt han tia khuc xa lam.

1033.

tia khuc xa chi la anh sang

vang, cdn tia sang lam bi phan xa toan phan.

1034.

so vdi phuang tia tdi, tia khuc
xa lam bi lech lt han tia khuc xa vang.

<b>Cau 597. Trong chan khong, cac buc xa duoc</b>

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1035.

tia hong ngoai, anh sang tlm,
tia tu ngoai, tia Ran-ghen.

1036.

tia hong ngoai, anh sang tlm,
tia Ran-ghen, tia tu ngoai.

1037.

anh sang tim, tia hong ngoai,
tia tu ngoai, tia Ran-ghen.

1038.

tia Ran-ghen, tia tu ngoai, anh sang
<b>tlm, tia hong ngoai. Cau 598: Khi chieu mot </b>
chum sang trang hep vao mot lang kinh thi:

1039.

Chum tia sang bi lech ve phla
day

1040.

Bi phan tach thanh nhieu
chum sang ci mau khac nhau va khong bi lech
ve pha day

C bi lech ve pha day va bi phan tach thanh

nhieu chum sang cri mau khac nhau

D. chum tia ra khoi lang knh la chum song
<b>song Cau 599: Hien tuong tan sac xay ra</b>

1041.

chi vdi lang knh thuy tinh

1042.

chi vdi lang knh chat ran
hoac long

1043.

d mat phan cach cua hai mdi

truang co chiet suat khac nhau

1044.

chi d mat phan cach cua hai

mdi truang ran hoac long vdi chan khong
(khong khi)

<b>Cau 600: Hien truong cau vong la ket qua cua </b>

hien tuong A. Tan xa anh sang B. Giao

thoa anh sang C Tan sac anh sang D.

Nhieu xa anh sang

<b>Cau 601: Dai sang co mau ti do den tlm ta thu</b>

duoc ti thl

nghiem thu nhat cua Niuton la do:

1045.

Thuy tinh da nhuom mau cho
anh sang

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1047.

Cac hat anh sang bi nhieu
loan khi di qua lang knh

1048.

Lang klnh lam lech anh sang

ve phla day nen thay doi mau cua no

<b>Cau 602: Khi anh sang chieu ti mdi truang trong</b>

suet nay sang mdi truang trong suet khac thi: A

Tan se khdng doi nhung budc song thay doi

1049.

budc song khdng doi nhung
tan se thay doi

1050.

ca budc song va tan se deu
thay doi

1051.

ca tan se va budc song deu
khdng thay doi

<b>Cau 603: Khi mot chum anh sang chieu ti</b>

khdng khl vao thuy tinh thi:

1052.

tan se tang, budc song giam

1053.

tan se giam, budc song tang

C tan se khdng doi,
budc song giam D. tan
se khdng doi, budc song
<b>tang Cau 604: Chon </b>
phat bieu dung

1054.

Budc song anh sang tlm ldn
han budc song anh sang do

1055.

Khi truyen qua mat phan
cach cua mdi truang co chiet suat ldn han thi tia
tim bi lech lt han tia do

1056.

Gric lech tia tlm qua lang knh
nho han goc lech tia do

1057.

Chiet suat cua mdi truang dei
vdi anh sang tlm ldn han anh sang do

<b>Cau 605: Trong thi nghiem giao thoa khe</b>

Young. Khoang van se thay doi khi:

1058.

Dich chuyen den lai gan khe

S

1059.

Thay doi knh loc sac F

1060.

Dich chuyen S ra xa dei vdi

hai khe SL va S2

1061.

Dich klnh loc sac F lai gan
khe S

<b>Cau 606: Trong thi nghiem giao thoa anh sang</b>

khe Young khi cri kinh loc sac. Chon cau sai

1062.

Cho thay anh sang co tlnh
chat song

1063.

SL va S2 la cac nguon ket hop

1064.

hai nguon SL va S2 co cung

budc song

1065.

SL va S2 cung pha

<b>Cau 607: Chieu vao hai khe trong thi nghiem</b>

giao thoa khe Young tuang ung hai buc xa XL

va X 2 ( XL chieu vao SL, X 2

chieu vao S2) thi tren man E

quan sat duoc: A khong cri

cac van giao thoa

1066.

cac van sang va tei xen ke
nhau

1067.

<i>cac van sang cua A1 va A</i>2

xen ke vdi cac van tei, tai mot se vi trl co su
chong lan cua hai van

1068.

nhung van sang co mau khac
vdi hai buc xa

<b>Cau 608: Khi chieu chum tia sang do hep vao</b>

mot khe hep thi

quan sat thay cac van sang tei xen ke nhau thi
day la hien tuong

A. giao thoa anh sang B. nhieu xa qua khe

hep

C. tan sac anh sang D. khuc xa anh

sang

<b>Cau 609: Dieu nao sau day sai khi noi ve may</b>

phan tlch quang
pho dung lang knh?

1069.

Dung de nhan biet cac thanh

phan phuc tap do mot nguon phat ra

1070.

bo phan quan trong la mot
lang knh

1071.

cri the thay the lang knh bang
cach tu nhieu xa

D. may hoat dong dua vao hien tuong nhieu
xa anh sang <b>Cau 610: Dieu nao sau day sai khi </b>

noi ve quang pho lien tuc

1072.

Khong phu thuoc vao thanh
phan cau tao cua nguon sang

1073.

Phu thuoc vao nhiet do nguon
sang

1074.

la nhung vach rieng biet tren
nen tei

1075.

do nhung vat ran, long, khl co
khei luong rieng ldn bi nung nring phat ra

<b>Cau 612: Khi nung mot cuc sat cho nhiet do</b>

tang dan thi quang pho cua no thay doi nhu the
nao?

1076.

ban dau chi co mau do, roi

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1077.

ban dau chi co mau do, khi
nhiet do du cao mdi thu duoc quang pho tu do
den tlm.

C Vung sang lan rong tu do den tlm, vung
sang nhat cung trai rong tu do den tlm

<b>D. Chi thay co mau do Cau</b>

<b>613: Quang pho vach duoc </b>

phat ra khi

1078.

Nung ning mot chat ran, long
hoac khl

1079.

Nung ning mot chat long

hoac khl

1080.

Nung nring chat khl d dieu

kien tieu chuan D Nung nring chat khl d ap

suat thap

<b>Cau 614: Quang pho vach cua mot khl hay hai </b>

dac trung cho

1081.

Chinh chat ay

1082.

ti le phan tram thanh phan

hoa hoc cua chat ay C Thanh phan hoa hoc

cua chat ay

D.Cau tao phan tu chat ay

<b>Cau 615: Nguyen te hoa hoc khac nhau phat ra</b>

cac quang pho khac nhau ve
A. se luong, mau sac,
cuang do cac vach B. se luong
cac vach va cuang do vach

C se luong, mau sac, budc song (vi trl) cac

vach va cuang do cac vach

D. mau sac va cuang
<b>do cac vach Cau 616: </b>
Quang pho vach hap thu
la

1083.

cac vach tei nam tren mot
nen sang

1084.

dai mau sang nam tren mot
nen tei

1085.

quang pho kien tuc thieu mot
se vach mau do khi (hay hai) hap thu

1086.

nhung vach mau rieng re
nam tren mot nen tei

<b>Cau 617: Dieu kien de thu duoc quang pho vach</b>

hap thu la

A nhiet do cua dam khl (hay hai) hap thu nho
han nhiet do cua nguon phat

1087.

nhiet do cua dam khl (hay

hai) hap thu ldn han nhiet do cua nguon phat

1088.

nhiet do cua dam khl (hay

hai) hap thu bang nhiet do cua nguon phat

1089.

dam khl (hay hai) hap thu
phai duoc nung nong den nhiet do cao

<b>Cau 618: Cho anh sang den day toc qua mot eng</b>

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1090.

khong thay vach hap thu nao
cua Hidro ngay ca khi nung nring eng

1091.

mot vach hap thu Ha khi tang

nhiet do cua eng den mot gia tri thlch hop

D thay ca ben vach xuat hien cung mot luc
khi nhiet do cua eng nang len mot gia tri thlch
hop <b>Cau 619: Phat bieu nao sau day la dung khi </b>

noi ve tia X ?

1092.

Khong cri kha nang dam
xxuyen.

1093.

La mot loai song dien tu co

budc song ngan han ca budc sring cua tia tu
ngoai.

1094.

Duoc phat ra tu den dien.

D La mot loai song dien tu phat ra tu nhung
vat bi nung nong den nhiet do khoang 50000_C

<b>Cau 620: Phat bieu nao sau day la sai ve eng </b>

Ranghen ?

A Tia X cri tan se cang ldn neu nhu dei catot
co khei luong cang ldn.

1095.

Nang luong tieu thu trong
eng Ranghen chu yeu la dudi dang nhiet lam
nong dei catot.

1096.

Dei catot lam bang chat co

nguyen tu luong ldn va ci nhiet do nong chay
cao.

1097.

Hieu dien the giua anot va

catot ci gia tri vao ca vai van von.

Cau 621: Tia tu ngoai, tia hong ngoai vatiaX co
budc song lan

luot la X], /.i,<i><b>}. ■}.. </b></i>Bieu thuc nao sau day la dung?

A X2 > X3 > XL B. X3 > X2 >

XL

C . X2 > X3 > XL D

.

XL >

X

2 >

X3

<b>Cau 622: Khi nrii ve tia tu ngoai, phat bieu nao</b>

dudi day la sai?

1098.

Tia tu ngoai co ban chat la
song dien ti.

1099.

Tia tu ngoai co budc song ldn
han budc song cua anh sang tim.

1100.

Tia tu ngoai co tac dung
manh len kinh anh.

1101.

Tia tu ngoai bi thuy tinh hap
thu manh va lam ion hoa khong khi.

<b>Cau 623: Dieu nao sau day la sai khi so sanh tia</b>

X va tia tu ngoai.

1102.

Cung ban chat la song dien tu

1103.

Cri kha nang gay phat quang
cho mot se chat

1104.

Tia Ranghen co budc song
dai han so vdi tia tu ngoai

1105.

Deu co tac dung len kinh anh

Cau 624: Than the con ngudi d nhiet dd <i><b>Y f C</b></i>

phat ra buc xa nao:

A. Tia X B. Buc xa nhin

thay.

C. Tia tu ngoai. D Tia hong

ngoai

<b>Cau 625: Phat bieu nao sau day la dung ?</b>

1106.

Tia tu ngoai co tan se cao han
tan se cua tia hong ngoai.

1107.

Tia tu ngoai co chu ki ldn han
chu ki cua tia hong ngoai.

1108.

Tia hong ngoai co tan se cao
han tan se cua tia sang vang.

1109.

Tia tu ngoai co budc song ldn
han budc song cua tia sang

do.

<b>Cau 626: Chon cau sai trong cac cau sau?</b>

A. Cac chat ran, long, khl d ap suat ldn bi
nung nong phat ra quang pho lien tuc

B. Quang pho vach cua cac nguyen te khac
nhau thi khac nhau

C De thu duoc quang pho hap thu, nhiet do
cua dam khl hay hai hap thu phai ldn han nhiet
do cua nguon sang phat ra quang pho lien tuc.

D. Giua vao quang pho lien tuc ta co the xac
<b>dinh duoc nhiet do cua nguon sang. Cau 627: </b>
Chon cau sai?

1110.

Moi buc xa d vung tu ngoai
deu bi thach anh hap thu

1111.

Cri the thu tia hong ngoai
theo nguyen tac thu song vd tuyen

1112.

Buc xa dien tu co budc song

cang ngan thi cri tinh dam xuyen cang manh,
cang de ion hoa khdng khl, de tac dung len kinh
anh, de lam phat quang cac chat

1113.

Budc song buc xa cang dai

thi cang de quan sat hien tuong giao thoa

<b>Cau 628: Trong truang hop nao sau day, truang</b>

hop nao lien quan den giao thoa anh sang?

1114.

Mau xanh cua bien bao giao

thdng khi duoc chieu bdi den pha dtd

1115.

Cac vach do va vach tei xen

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1116.

Mau sac cua anh sang trang
khi di qua lang klnh

1117.

Mau sac cua cau vong sau
can mua

<b>Cau 629: Trong thi nghiem Young, khe S duoc</b>

chieu bang nguon anh sang trang, tren man
quan sat duoc

1118.

Van sang mau trang chlnh

giua, hai ben la cac van mau cri mep trong (gan
van trung tam) mau do, mep ngoai mau tim

1119.

Mot dai mau sang ci mau
bien thien ti do den tlm

C Van sang trang d chlnh giua, hai ben (gan
van trang) la quang pho bac 1 tu mau tlm den
do

<b>D. Cac vach mau rieng biet tren nen tei Cau </b>

<b>630: Phat bieu nao sau day sai khi nrii ve tia </b>

Ronghen

1120.

ci kha nang dam xuyen

1121.

tac dung len kinh anh, lam

phat quang mot se chat C bi lech trong dien

truang

<b>D. cri tac dung sinh ly Cau 631: Phat bieu </b>
nao sau day dung khi noi ve quang pho lien
tuc ?

1122.

dung de xac dinh budc song
anh sang

1123.

dung de xac dinh nhiet do cua
cac vat phat sang do nung ning

1124.

dung de xac dinh thanh phan
cau tao cua cac vat sang

1125.

dung de xac dinh cdng suat
nguon sang

<b>Cau 632: Tia tu ngoai khdng co tlnh chat nao </b>

sau day?

1126.

cri the gay ra hien tuong
quang dien

1127.

khong bi nudc hap thu

1128.

lam ion hia khong khi

1129.

tac dung len kinh anh

<b>Cau 633: Trong thi nghiem giao thoa anh sang</b>

khe I-ang neu ta lam cho hai nguon sang tu hai
khe lech pha thi van sang trung tam se

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1130.

khdng thay doi

1131.

xe

dich theo chieu

nguon sdm pha D xe

dich theo chieu
nguon tre pha

<b>Cau 634: Nhung dac diem nao sau day dung</b>

cho ca hong ngoai va tu ngoai

A deu la cac song dien ti, co the phat ra ti cac
vat bi det ning

1132.

lam den phim anh va gay

phat quang

1133.

tac dung nhiet manh va gay
phat quang

1134.

ci kha

nang ion hoa tet khdng
<b>khl Cau 635: Cho cac </b>
nguon sang gom

1135.

day tric vo-fram nring sang

nam trong bong thuy tinh da rut khdng khl den
ap suat thap

1136.

hai Na vdi ap suat thap phat
sang trong eng phong dien

1137.

den hai thuy ngan co ap suat
vai atmotphe (den cao ap) dung lam den duang

Nhung nguon sang cho quang pho vach la A.

a va b B. b va c C. chi b D. chi a

<b>CHI ONG VI. HUONG TU' ANH </b>
<b>SANG</b>

<b>a. ---;---</b><i><b>f</b></i><b>---</b><i><b>Tj,</b></i><b></b>
<b>---:---</b><i>x .</i>
<b>Cau 636. Chon cau dung. Neu chieu mot chum</b>

tia hong ngoai vao tam kem tlch dien am, thi:

1138.

tam kem mat dan dien tlch
duang.

1139.

Tam kem mat dan dien tlch

am.

1140.

Tam kem trd nen trung hoa

ve dien.

1141.

dien tlch am cua tam kem

khdng doi.

<b>Cau 637. Chon cau tra lai dung. Gidi han quang</b>

dien cua moi kim loai la:

1142.

budc song cua anh sang kch

thlch chieu vao kim loai.

1143.

Cong thoat cua cac electron d
be mat kim loai do.

1144.

Budc song gidi han cua anh

sang kch thlch de gay ra hien tuong quang dien
kim loai do.

1145.

hieu dien the ham.

<b>Cau 638. De gay duoc hieu ung quang dien, buc</b>

xa doi vao kim loai duoc thoa man dieu kien
nao sau day.

1146.

Tan se ldn han gidi han
quang dien.

1147.

Tan se nho han gidi han
quang dien.

C Budc song nho han gidi han quang dien.

D. Budc song ldn han gidi han quang dien

<b>Cau 639. Chon phat bieu dung. Vdi mot buc xa </b>

co budc song thich hop thi cuang do ddng
quang dien bao hoa:

1148.

triet tieu, khi cuang do chum
sang kich thich nho han mot gia tri gidi han.

D ti le vdi cuang do chum sang.

1149.

ti le vdi binh phuang cuang
do chum sang.

1150.

ti le vdi can bac hai cua cuang
do chum sang.

<b>Cau 640. Dieu nao dudi day sai, khi noi ve</b>

nhung ket qua rut ra tu thl nghiem vdi te bao

quang dien.

1151.

Hieu dien the giua anet va

catet cua te bao quang dien luon cri gia tri am
khi ddng quang dien triet tieu.

1152.

Ddng quang dien vin cdn ton

tai ngay ca khi hieu dien the giua anet va catot
cua te bao quang dien bang khdng.

1153.

Cuang do ddng quang dien

bao hoa khong phu thuoc vao cuang do chum
sang kich thich.

D. Gia tri cua hieu dien the ham phu thuoc
vao budc song cua anh sang kch thlch.

<b>Cau 641. Phat bieu nao sau day la dung khi noi</b>

ve hien tuong quang dien.

A La hien tuong hien tuong electron but ra
khoi be mat tam kim loai khi co anh sang thlch
hop chieu vao nri.

1154.

La hien tuong hien tuong
electron but ra khoi be mat tam kim loai khi tam

kim loai bi nung nong.

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1156.

La hien tuong hien tuong
electron but ra khoi be mat tam kim loai do bat
ky nguyen nhan nao khac.

<b>Cau 642. Phat bieu mao sau day la sai khi noi ve</b>

thuyet luong tu anh sang.

1157.

Nhung nguyen tu hay phan tu

vat chat khdng hap thu hay buc xa anh sang mot
cach lien tuc ma thanh ting phan rieng biet, dut
quang.

1158.

Chum sang la ddng hat, moi
hat la mot phdtdn.

C Nang luong cua cac phdtdn anh sang la
nhu nhau, khdng phu thuoc vao budc sring anh
sang.

D. Khi anh sang truyen di, cac luong tu anh
sang khdng bi thay doi, khdng phu thuoc
<b>khoang cach tdi nguon sang Cau 643. Phat bieu </b>
nao sau day la sai khi noi ve dong nang ban cuc
dai cua cac electron quang dien.

1159.

Dong nang ban dau cuc dai

cua cac electron quang dien khong phu thuoc
vao cuang do chum sang kich thich.

1160.

Dong nang ban cuc dai cua

cac electron quang dien phu thuoc vao budc
song cua anh sang kch thlch.

C Dong nang ban cuc dai cua cac electron
quang dien khong phu thuoc vao ban chat cua
kim loai lam catot.

D. Dong nang ban cuc dai cua cac electron
quang dien phu thuoc vao ban chat cua kim loai
<b>lam catot. Cau 644. Phat bieu nao sau day la </b>
dung.

A Hien tuong quang dien la hien tuong
electron bi but ra khoi kim loai khi chieu vao
kim loai anh sang thlch hop.

1161.

Hien tuong quang dien la
hien tuong electron bi but ra khoi kim loai khi
no bi nung nong.

1162.

Hien tuong quang dien la
hien tuong electron bi but ra khoi kim loai khi
dat tam kim loai vao trong mot dien truang
manh.

1163.

Hien tuong quang dien la hien tuong
electron bi but ra khoi kim loai khi nhung tam
<b>kim loai vao trong mot dung dich. Cau 645. </b>
Gidi han quang dien cua moi kim loai la

A Budc song dai nhat cua buc xa chieu vao
kim loai do ma gay ra duoc hien tuong quang
dien.

1164.

Budc song ngan nhat cua buc

xa chieu vao kim loai do ma gay ra duoc hien
tuong quang dien.

1165.

Cong nho nhat dung de but

electron ra khoi be mat kim loai do.

1166.

Cong ldn nhat dung de but

electron ra khoi be mat kim loai do.

<b>Cau 646. Ddng quang dien dat den gia tri bao </b>

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<span class='text_page_counter'>(86)</span><div class='page_container' data-page=86>

A Tat ca cac electron bat ra ti catdt khi catdt
duoc chieu sang deu di ve duoc andt.

1167.

Tat ca cac electron bat ra ti
catdt khi catdt duoc chieu sang deu quay trd ve

duoc catdt.

1168.

Cri su can bang giua se
electron bat ra tu catdt va se electron bi hut quay
trd lai catdt.

1169.

SO electron di ve duoc catdt

<b>khdng doi theo thai gian. Cau 647. Ddng quang </b>
dien ton tai trong te bao quang dien khi

1170.

Chieu vao catot cua te bao

quang dien mot chum buc xa co cuang do ldn
va hieu dien the giua andt va catot cua te bao

quang dien la UAK > 0.

1171.

Chieu vao catet cua te bao

quang dien mot chum buc xa co budc song dai.

1172.

Chieu vao catot cua te bao

quang dien mot chum buc xa co budc song
ngan thlch hop.

D Chieu vao catot cua te bao quang dien mot
chum buc xa co budc song ngan thlch hop va
hieu dien the giua andt va catot cua te bao

quang dien la UAK phai ldn han hieu dien the

ham Uh <b>Cau 648. Phat bieu nao sau day la</b>

khdng dung.

1173.

Dong nang ban dau cuc dai

cua electron quang dien phu thuoc vao ban chat
cua kim loai.

1174.

Dong nang ban dau cuc dai

cua electron quang dien phu thuoc budc song
cua chum anh sang kich thich.

1175.

Dong nang ban dau cuc dai

cua electron quang dien phu thuoc tan sd cua
chum anh sang kich thich.

D Dong nang ban cuc dai cua electron
quang dien phu thuoc cuang do cua chum anh
sang kich thich. <b>Cau 649. Phat bieu nao sau day </b>

la dung.

1176.

Hien tuong quang dien chi
xay ra khi gidi han quang dien X cua kim loai
lam catot nho han budc sring X cua anh sang

kich thich.

1177.

Vdi anh sang kch thlch co

budc song X > X0 thi cuang do ddng quang

dien bao hda ti le thuan vdi cuang do chum anh
sang kich thich.

C Hieu dien the ham phu thuoc vao budc
song cua anh sang kich thich va ban chat cua
kim loai dung lam catot.

D. Hieu dien the ham phu thuoc vao cuang

do cua chum anh

sang kich thich.

<b>Cau 650. Chon cau dung:</b>

1178.

Khi tang cuang do cua chum

anh sang kich thich len hai lan thi cuang do
ddng quang dien tang len hai lan.

1179.

Khi tang budc song cua chum

anh sang kich thich len hai lan thi cuang do
ddng quang dien tang len hai lan.

1180.

Khi giam budc song cua
chum anh sang kich thich xudng hai lan thi
cuang do ddng quang dien tang len hai lan.

D Khi anh sang kch thlch gay ra duoc hien
tuong quang dien. Neu giam budc song cua
chum buc xa thi dong nang ban

cuc dai cua electron
quang dien tang len. <b>Cau 651. </b>

Chon cau dung

A. Hieu dien the ham la hieu dien the am can
dat giua catdt va anot cua te bao quang dien de
triet tieu ddng quang dien.

1181.

Hieu dien the ham la hieu
dien the am can dat giua catdt va anot cua te bao
quang dien de via du triet tieu ddng quang dien.

1182.

Hieu dien the ham la hieu

dien the duang can dat giua catot va anot cua te
bao quang dien de triet tieu ddng quang dien.

1183.

Hieu dien the ham la hieu
dien the duang can dat giua catot va anot cua te
bao quang dien de via du triet tieu ddng quang

dien.

<b>Cau 652. Phat bieu nao sau day la khdng dung.</b>

1184.

Dong nang ban dau cuc dai

cua electron quang dien khong phu thuoc vao
cuang do cua chum anh sang kich thich.

1185.

Dong nang ban dau cuc dai

cua electron quang dien phu thuoc vao ban chat
kim loai dung lam catot.

C Dong nang ban cuc dai cua electron quang
dien khong phu thuoc vao budc song cua chum
anh sang kich thich.

</div>
<span class='text_page_counter'>(87)</span><div class='page_container' data-page=87>

Theo thuyet phdtdn cua Einstein, thi nang
luong:

1186.

cua moi phdtdn deu bang
nhau.

1187.

cua mot phdtdn bang mot
luong tu nang luong.

1188.

giam dan khi phdtdn ra xa

dan nguon sang. D. cua phdtdn khong phu

thuoc vao budc song.

<b>Cau 654. Theo quan diem cua thuyet luong tu</b>

phat bieu nao sau day la khdng dung.

1189.

Chum anh sang la mot ddng

hat, moi hat la mot photon mang nang luong.

1190.

Cuang do chum sang ti le
thuan vdi se phdton trong chum.

1191.

Khi anh sang truyen di cac

phdton anh sang khdng doi, khong phu thuoc
khoang cach den nguon sang.

D Cac photon co nang luong bang nhau vi
chung lan truyen vdi van tec bang nhau.

<b>Cau 655. Chon cau dung. Hien tuong quang din</b>

la hien tuong:

1192.

mot chat cach dien trd thanh
din dien khi duoc chieu sang.

1193.

Giam dien trd cua mot chat
ban din, khi duoc chieu sang.

1194.

Giam dien trd cua kim loai
khi duoc chieu sang.

1195.

Truyen din anh sang theo cac
soi quang udn cong mot cach bat ky.

<b>Cau 656 Chon cau dung Theo dinh ngha, hien</b>

tuong quang dien trong la:

1196.

hien tuong quang dien xay ra
tren mat ngoai mot chat ban din.

1197.

hien tuong quang dien xay ra
ben trong mot chat ban dim.

1198.

nguyen nhan sinh ra hien
tuong quang din.

D su giai phong cac electron lien ket de
chung trd thanh electron din nha tac dung cua
mot buc xa dien tu. <b>Cau 657. Chon cau dung. </b>

Pin quang dien la nguon dien trong
do:

</div>
<span class='text_page_counter'>(88)</span><div class='page_container' data-page=88>

1199.

nang luong mat trai duoc bien
doi truc tiep thanh dien nang.

1200.

mot te bao quang dien duoc
dung lam may phat dien.

1201.

mot quang dien trd, khi duoc

chieu sang, thi trd thanh may phat dien.

<b>Cau 659. Phat bieu nao sau day la dung khi noi</b>

ve hien tuong quang din.

A Hien tuong quang din la hien tuong giam
manh dien trd cua chat ban din khi bi chieu
sang.

1202.

Trong hien tuong quang din,

electron duoc giai phong ra khoi khdi chat ban
din.

1203.

Mot trong nhung ung dung

quan trong cua hien tuong quang din la viec che
tao den dng (den neon..

1204.

Trong hien tuong quang din,

nang luong can thiet de giai phring electron lien
ket thanh electron la rat ldn.

<b>Cau 660. Phat bieu nao sau day la dung.</b>

1205.

De mot chat ban din trd thanh
vat din thi buc xa dien ti chieu vao chat ban din

phai co budc song ldn han mot gia tri X0 phu

thuoc vao ban chat cua chat ban din.

1206.

De mot chat ban din trd thanh
vat din thi buc xa dien ti chieu vao chat ban din
phai co tan sd ldn han mot gia tri 10 phu thuoc

vao ban chat cua chat ban din.

1207.

De mot chat ban din trd thanh
vat din thi cuang do cua chum buc xa dien ti
chieu vao chat ban din phai ldn han mot gia tri
nao do phu thuoc vao ban chat cua chat ban din.

1208.

De mot chat ban din trd thanh
vat din thi cuang do cua chum buc xa dien tu
chieu vao chat ban din phai nho han mot gia tri
nao do phu thuoc vao ban chat cua chat ban din.

<b>Cau 661. Phat bieu nao sau day la dung.</b>

1209.

Hien tuong quang dien trong

la hien tuong but electron ra khoi be mat kim

loai khi chieu vao kim loai anh sang co budc
sring thich hop.

1210.

Hien tuong quang dien trong

la hien tuong electron bi ban ra khoi kim loai
khi kim loai bi det nong

1211.

Hien tuong quang dien trong

la hien tuong electron lien ket duoc giai phong
thanh electron din khi chat ban din duoc chieu
bang buc xa thlch hop.

1212.

Hien tuong quang dien trong

la hien tuong dien trd cua vat din kim loai tang
len khi chieu anh sang vao kim loai.

<b>Cau 662. Phat bieu nao sau day la dung.</b>

1213.

Quang trd la mot linh kien

ban din hoat dong dua tren hien tuong quang
dien ngoai.

1214.

Quang trd la mot linh kien

ban din hoat dong dua tren hien tuong quang
dien trong.

1215.

Dien trd cua quang trd tang

nhanh khi quang trd duoc chieu sang.

1216.

Dien trd cua quang trd khdng
doi khi quang trd duoc chieu sang bang anh
sang co budc song ngan.

<b>Cau 663. Chon phat bieu dung. Trang thai ding</b>

cua nguyen tu
la:

1217.

trang thai dung yen cua
nguyen tu.

1218.

Trang thai chuyen dong deu
cua nguyen tu.

1219.

Trang thai trong do moi
electron cua nguyen tu deu khdng chuyen dong
ddi vdi hat nhan.

1220.

Mot trong sd cac trang thai co
nang luong xac dinh, ma nguyen tu co the ton
tai.

<b>Cau 664. Chon phat bieu dung. d trang thai ding,</b>

nguyen tu A khong buc xa va khong hap thu

nang luong.

1221.

Khong buc xa nhung co the
hap thu nang luong.

1222.

khong hap thu, nhung co the
buc xa nang luong.

1223.

Vin co the hap thu va buc xa
nang luong.

<b>Cau 665. Day Ban-me ung vdi su chuyen</b>

electron tu quy dao d xa hat nhan ve quy dao
nao sau day.

A Quy dao K B. Quy dao L.

C Quy dao M. D. Quy dao N.

<b>Cau 666. Miu nguyen tu Bo khac miu nguyen tu</b>

Ra-da-pho d diem nao dudi day

1224.

Hinh dang quy dao cua cac
electron.

1225.

Luc tuang tac giua electron

va hat nhan nguyen tu. C Trang thai co nang

</div>
<span class='text_page_counter'>(89)</span><div class='page_container' data-page=89>

<b>D. Mo hinh nguyen tu ci hat nhan. Cau 667. </b>
Phat bieu nao sau day la dung nhat khi noi ve
noi dung tien de "cac trang thai ding cua nguyen
tu" trong miu nguyen tu Bo.

1226.

Trang thai ding la trang thai
co nang luong xac dinh.

1227.

Trang thai ding la trang thai
ma nguyen tu dung yen.

1228.

Trang thai ding la trang thai
ma nang luong cua nguyen tu khdng thay doi
duoc.

1229.

Trang thai ding la trang thai
ma nguyen tu co the ton tai trong mot khoang
thai gian xac dinh ma khong buc xa nang luong.

<b>Cau 668. Phat bieu nao sau day la dung. Tien de</b>

ve su hap thu va buc xa nang luong cua nguyen
tu co noi dung la:

1230.

Nguyen tu hap thu phdton thi
chuyen trang thai ding.

1231.

Nguyen tu buc xa phdton thi
chuyen trang thai ding.

C Moi khi chuyen trang thai ding nguyen tu
buc xa hoac hap thu photon co nang luong dung
bang do chenh lech nang luong giua hai trang
thai do

D. Nguyen tu hap thu anh sang nao thi se phat
ra anh sang
do.

<b>Cau 669 Day Laiman nam trong vung:</b>

A tu ngoai. B. anh sang
nhin thay.

1232.

hong ngoai. D.

anh sang nhin thay va mot
phan trong vung tu ngoai.

<b>Cau 670 Day Banme nam trong vung:</b>

1233.

tu ngoai.

1234.

anh sang nhin thay.

1235.

hong ngoai.

D anh sang nhin thay va mot phan trong
vung tu ngoai. <b>Cau 671 Day Pasen nam trong </b>

vung:

A. tu ngoai. B. anh sang nhin thay. C hong

ngoai.

1236.

anh sang nhin thay va mot phan trong
<b>vung tu ngoai. Cau 672. Chon cau dung Cuang </b>
do cua chum sang dan sac truyen qua mdi
truang hap thu

</div>
<span class='text_page_counter'>(90)</span><div class='page_container' data-page=90>

B. giam ti le vdi binh phuang do dai duang di

cua tia sang. C giam theo dinh luat ham sd mu

cua do dai duang di cua tia sang.

D. giam theo ti le nghich vdi do dai duang di
<b>cua tia sang. Cau 673. Hap thu loc lua anh sang </b>
la:

1237.

hap thu mot phan anh sang

chieu qua lam cuang do chum sang giam di.

1238.

hap thu toan bo mau sac nao
do khi anh sang di qua.

C moi budc song bi hap thu mot phan, budc
song khac nhau, hap thu khdng gidng nhau.

<b>D. Tat ca cac dap an tren. Cau 674. Chon cau</b>
dung: Mau sac cac vat la do vat

1239.

hap thu anh sang chieu vao.

1240.

phan xa anh sang chieu vao.

1241.

cho anh sang truyen qua.

1242.

hap thu mot se budc song anh
sang va phan xa, tan xa nhung budc song khac.

<b>Cau 675. Chon cau dung. anh sang huynh quang</b>

la:

1243.

ton tai mot thai gian sau khi
tat anh sang kch thlch.

1244.

hai nhu tat ngay sau khi tat
anh sang kch thlch.

1245.

co budc song nhi han budc
song anh sang kch thlch.

1246.

do cac tinh the phat ra, sau

khi duoc kch thlch bang anh sang thich hop.

<b>Cau 676. Chon cau dung. anh sang lan quang la:</b>

1247.

duoc phat ra bdi chat ran, chat
long lin chat khl.

1248.

hai nhu tat ngay sau khi tat

anh sang kch thlch. C cri the ton tai rat lau

sau khi tat anh sang kch thlch.

D. co budc song nho han budc song anh sang
<b>kch thlch. Cau 677. Chon cau sai</b>

1249.

Su phat quang la mot dang

phat anh sang pho bien trong tu nhien.

1250.

Khi vat hap thu nang luong

dudi dang nao do thi ni phat ra anh sang, do la
phat quang.

C Cac vat phat quang cho mot quang pho
nhu nhau

D. Sau khi nging kch thlch, su phat quang
mot sd chat cdn

keo dai mot thai gian nao do.

<b>Cau 678. Chon cau sai</b>

1251.

Huynh quang la su phat

quang co thai gian phat quang ngan (dudi 10-8_s).

1252.

Lan quang la su phat quang

co thai gian phat quang dai (tu 10--6_{s trd len).}

C Budc song X' anh sang phat quang bao gia
nho han budc sring X cua anh sang hap thu X'

D. Budc song X' anh sang phat quang bao
gia cung ldn han budc song X cua anh sang hap
<b>thu X' >X Cau 679. Tia laze khdng co dac diem </b>
nao dudi day:

A. Do dan sac cao. B. do dinh

hudng cao.

1253.

Cuang do ldn.

D Cong suat ldn.

<b>Cau 680. Trong laze rubi cri su bien doi cua</b>

dang nang luong nao dudi day thanh quang
nang.

A. Dien nang. B. Ca nang.

C. Nhiet nang D Quang nang.

<b>Cau 681. Hieu suat cua mot </b>

laze:

A. nho han 1.

B. Bang 1.

C. ldn han 1. D. rat ldn so vdi

1 .

<b>Cau 682. Laze rubi khong hoat dong theo</b>

nguyen tac nao dudi day.

1254.

Dua vao su phat xa cam ung.

1255.

Tao ra su dao lon mat do.

C Dua vao su tai hop giua electron va lo
trdng.

D. Su dung buong cong hudng.

<b>Cau 683. Hay chi ra cau co noi dung sai.</b>

Khoang cach 2 guang trong laze co the bang:

1256.

mot se chan lan nua budc
song.

1257.

mot se le lan nua budc song.

1258.

mot se chan lan phan tu budc
song.

D mot sd le lan phan tu budc song cua anh
sang dan sac ma laze phat ra.

<b>Cau 684. Phat bieu nao sau day la dung.</b>

1259.

Hien tuong quang dien chi

xay ra khi gidi han quang dien X0 cua kim loai

</div>
<span class='text_page_counter'>(91)</span><div class='page_container' data-page=91>

1260.

Vdi anh sang kch thlch co

budc song X > X0 thi cuang do ddng quang

dien bao hda ti le thuan vdi cuang do chum anh
sang kich thich.

C Hieu dien the ham phu thuoc vao budc
song cua anh sang kich thich va ban chat cua
kim loai dung lam catot.

D. Hieu dien the ham phu thuoc vao cuang

do cua chum anh

sang kich thich.

<b>Cau 685. Chon cau dung</b>

1261.

Hieu dien the ham la hieu

dien the am can dat giua catdt va anot cua te bao
quang dien de triet tieu ddng quang dien.

1262.

Hieu dien the ham la hieu

dien the am can dat giua catdt va anot cua te bao
quang dien de via du triet tieu ddng quang dien.

1263.

Hieu dien the ham la hieu

dien the duang can dat giua catot va anot cua te
bao quang dien de triet tieu ddng quang dien.

D Hieu dien the ham la hieu dien the duang
can dat giua catot va anot cua te bao quang dien

de via du triet tieu ddng quang dien.

<b>Cau 686. Theo quan diem cua thuyet luong tu</b>

phat bieu nao sau day la khdng dung.

1264.

Chum anh sang la mot ddng

hat, moi hat la mot photon mang nang luong.

1265.

Cuang do chum sang ti le
thuan vdi se phdton trong chum.

1266.

Khi anh sang truyen di cac

phdton anh sang khdng doi, khong phu thuoc
khoang cach den nguon sang.

D Cac photon co nang luong bang nhau vi
chung lan truyen vdi van tec bang nhau. <b>Cau </b>
<b>486. Phat bieu nao sau day la dung.</b>

A. De mot chat ban din trd thanh vat din thi
buc xa dien ti chieu vao chat ban din phai co

budc song ldn han mot gia tri X0 phu thuoc vao

</div>
<span class='text_page_counter'>(92)</span><div class='page_container' data-page=92>

1267.

De mot chat ban din trd thanh
vat din thi buc xa dien tu chieu vao chat ban din
phai co tan sd ldn han mot gia tri 10 phu thuoc

vao ban chat cua chat ban din.

1268.

De mot chat ban din trd thanh
vat din thi cuang do cua chum buc xa dien ti
chieu vao chat ban din phai ldn han mot gia tri
nao do phu thuoc vao ban chat cua chat ban din.

1269.

De mot chat ban din trd thanh
vat din thi cuang do cua chum buc xa dien tu
chieu vao chat ban din phai nho han mot gia tri
nao do phu thuoc vao ban chat cua chat ban din.

<b>Cau 687. Phat bieu nao sau day la dung nhat khi</b>

noi ve noi dung tien de "cac trang thai ding cua
nguyen tir" trong miu nguyen tu Bo.

1270.

Trang thai ding la trang thai
co nang luong xac dinh.

1271.

Trang thai ding la trang thai
ma nguyen tu dung yen.

1272.

Trang thai ding la trang thai
ma nang luong cua nguyen tu khdng thay doi
duoc.

D Trang thai ding la trang thai ma nguyen tu
co the ton tai trong mot khoang thai gian xac

dinh ma khong buc xa nang luong.

<b>Cau 688. Chon cau dung: Cac vach thuoc day</b>

Banme ung vdi su chuyen cua electron tu cac
quy dao ngoai ve

A Quy dao K B. Quy dao L

C. Quy dao M D. Quy dao O

<b>Cau 689. Dong nang ban dau cuc dai cua cac</b>

electron quang dien

1273.

khong phu thuoc budc song
anh sang klch thlch.

1274.

phu thuoc cuang do anh sang
klch thlch.

1275.

khong phu thuoc ban chat
kim loai lam catet.

D phu thuoc ban chat kim loai lam catdt va
budc song anh sang kich thich

<b>Cau 690. Mot chum anh sang dan sac tac dung</b>

len be mat mot kim loai va lam but cac electron

ra khoi kim loai nay. Neu tang cuang do chum
sang do len ba lan thi

A sd luong electron thoat ra khoi be mat kim
loai do trong moi gay tang ba lan.

1276.

dong nang ban cuc dai cua

electron quang dien tang ba lan.

1277.

dong nang ban dau cuc dai

cua electrdn quang dien tang chin lan.

1278.

cong

thoat cua electron giam
<b>ba lan. Cau 690. Phat </b>
bieu nao la sai.

1279.

Dien trd cua quang trd giam

manh khi co anh sang thlch hop chieu vao.

1280.

Nguyen tac hoat dong cua tat
ca cac te bao quang dien deu dua tren hien
tuong quang din.

1281.

Trong pin quang dien, quang

nang bien doi truc tiep thanh dien nang.

1282.

Ci mot se te bao quang dien

hoat dong khi duoc klch thich bang anh sang
nhin thay.

<b>Cau 691. Noi dung chu yeu cua thuyet luong tu</b>

truc tiep noi ve

1283.

su hinh thanh cac vach quang
pho cua nguyen tu.

1284.

su ton tai cac trang thai ding
cua nguyen tu hidrd.

1285.

cau tao cua cac nguyen tu,
phan tu.

D su phat xa va hap thu anh sang cua nguyen
tu, phan tu. <b>Cau 692. Trong thi nghiem vdi te</b>

bao quang dien, khi chieu chum sang kich thich
vao catet thi ci hien tuong quang dien xay ra. De
triet tieu ddng quang dien, nguai ta dat vao giua
andt va catdt mot hieu dien the goi la hieu dien
the ham. Hieu dien the ham nay co do ldn

1286.

lam tang tec electron quang

dien di ve andt.

1287.

phu thuoc vao budc song cua
chum sang kich thich.

1288.

khong phu thuoc vao kim loai

lam catdt cua te bao quang dien.

1289.

ti le vdi cuang do cua chum
sang kich thich.

<b>Cau 693. O mot nhiet do nhat dinh, neu mot</b>

dam hai co kha nang phat ra hai anh sang dan

sac co budc song tuang ung Xx va X2 (vdi X <

X2 ) thi nri cung co kha nang hap thu

1290.

moi anh sang dan sac co budc

song nho han Xx.

1291.

moi anh sang dan sac co budc

song trong khoang tu Xx den X2.

</div>
<span class='text_page_counter'>(93)</span><div class='page_container' data-page=93>

D. moi anh sang dan sac co budc song ldn

han X2. <b>Cau 694. Trong nguyen tu hidrd, khi </b>

electron chuyen tu qui dao N ve qui dao L se
phat ra vach quang pho

A Hy (cham). B. H5 (tim).

C H

p

(lam). D. Ha (do).

<b>Cau 695. Hien tuong cac electron bi bat ra khoi</b>

mat kim loai khi ci anh sang thich hop chieu
vao goi la

1292.

hien tuong buc xa electron

1293.

hien tuong quang dien ben
ngoai

1294.

hien tuong quang din

1295.

hien tuong quang dien ben
trong

<b>Cau 696. Trong quang pho vach cua nguyen tu</b>

hidrd, cac vach H, H

p

, H, H trong day

Banme cri budc song nam trong khoang budc
song cua

A. tia Ranghen B. anh sang

thay duoc

C. tia hong ngoai D. Tia tu ngoai

<b>Cau 697. Trong quang pho vach cua nguyen tu</b>

hidrd, vach H

p

(lam) ung vdi electron chuyen

tu

1296.

quy dao N ve quy dao L

1297.

quy dao M ve quy dao L

1298.

quy dao P ve quy dao L

1299.

quy dao O ve quy dao L

<b>Cau 698. Trong quang pho vach cua nguyen tu</b>

hidrd, vach

H

g

(tim) ung vdi electron chuyen tu

A. quy dao N ve quy dao L B. quy dao M ve

quy dao L C quy dao P ve quy dao L D. quy

dao O ve quy dao L

<b>Cau 699. Trong quang pho vach cua nguyen tu</b>

hidrd, vach

R(cham) ung vdi electron chuyen tu

A. quy dao N ve quy dao L B. quy dao M ve

quy dao L C. quy dao P ve quy dao L D

quy dao O ve quy dao L

<b>Cau 700. Trong quang pho vach cua nguyen tu</b>

hidrd, vach

H(do. ung vdi electron chuyen tu

A. quy dao N ve quy dao L B quy dao M ve

</div>
<span class='text_page_counter'>(94)</span><div class='page_container' data-page=94>

<b>Cau 701. Trong quang pho vach cua nguyen tu</b>

hidrd, cac vach day Lyman duoc tao thanh khi
electron chuyen ti cac quy dao ben ngoai ve quy
dao

A. K B. L C. M D. N

<b>Cau 702. Trong quang pho vach cua nguyen tu</b>

hidrd, cac vach day Pasen duoc tao thanh khi
electron chuyen ti cac quy dao ben ngoai ve quy
dao

A. K B. L C. M D. N

<b>Cau 703. Trong quang pho vach cua nguyen tu</b>

hidrd, cac vach day Banme duoc tao thanh khi
electron chuyen ti cac quy dao ben ngoai ve quy
dao

A. K B. L C. M D. N

<b>Cau 704. Theo tien de cua Bo, khi electron trong</b>

nguyen tu hidrd chuyen ti quy dao L sang quy
dao K thi nguyen tu phat ra phdtdn co budc

song X21, khi electron chuyen ti quy dao M

sang quy dao L thi nguyen tu phat ra phdtdn co

budc song X32 va khi electron chuyen ti quy dao

M sang quy dao K thi nguyen tu phat ra phdtdn

co budc song X31. Bieu thuc xac dinh X31 la

A X31 =

B. X31 = X32 - X21

X 32X

C. X31=X32+X21.

X_{21 ^}X₃₁

<b>Cau 705. Miu nguyen tu Bo, ban knh quy dao K</b>

cua electron trong nguyen tu hidrd la r0. Khi

electron chuyen ti quy dao N ve quy dao L thi
ban kinh quy dao giam bdt

A 12r0. B. 4r0. C. 9r0. D. 16r0.

<b>Cau 706. Pin quang dien la nguon dien, trong do</b>

1300.

hoa nang duoc bien doi truc

tiep thanh dien nang. B. quang nang duoc bien

doi truc tiep thanh dien nang.

C. ca nang duoc bien doi truc tiep thanh dien

nang. D. nhiet nang duoc bien doi truc tiep
<b>thanh dien nang. Cau 707. Trong mot thl</b>
nghiem, hien tuong quang dien xay ra khi chieu
chum sang dan sac tdi be mat tam kim loai. Neu
giu nguyen budc song anh sang klch thlch ma
tang cuang do cua chum sang thi

A sd electron bat ra khoi tam kim loai trong
mot giay tang len.

1301.

dong nang ban dau cuc dai

cua electron quang dien tang len.

1302.

gidi han quang dien cua kim
loai bi giam xueng.

1303.

van tec ban dau cuc dai cua

cac electron quang dien tang len.

<b>Cau 708. Khi nii ve thuyet luong tu anh sang,</b>

phat bieu nao sau day la dung.

1304.

Nang luong phdtdn cang nho

khi cuang do chum anh sang cang nho.

1305.

Photon ci the chuyen dong

hay dung yen tuy thuoc vao nguon sang chuyen
dong hay dung yen.

1306.

Nang luong cua phdtdn cang

ldn khi tan se cua anh sang ung vdi phdtdn do
cang nho.

D Anh sang duoc tao bdi cac hat goi la
photon

<b>Cau 709. Thuyet luong ti anh sang thi nang </b>

luong cua

1307.

mot phdtdn bang nang luong
nghi cua mot electron.

1308.

mot phdtdn phu thuoc vao
khoang cach ti phdtdn do tdi nguon phat ra no.

1309.

cac phdtdn trong chum sang
dan sac bang nhau

1310.

mot phdtdn ti le thuan vdi

budc song anh sang tuang ung vdi phdtdn do.

<b>Cau 710. Khi ci hien tuong quang dien xay ra</b>

trong te bao quang dien, phat bieu nao sau dau
la sai.

1311.

Giu nguyen chum sang kch

thlch, thay doi kim loai lam catet thi dong nang
ban dau cuc dai cua electrdn quang dien thay
doi

1312.

Giu nguyen cuang do chum

sang kich thich va kim loai dung lam catet,
giam tan se cua anh sang klch thlch thi dong
nang ban cuc dai cua electron quang dien
giam.

C Giu nguyen tan sd cua anh sang kch thich va
kim loai lam catet, tang cuang do chum sang
kich thich thi dong nang ban cuc dai cua
electron quang dien tang.

D. Giu nguyen cuang do chum sang kich
thich va kim loai dung lam catet, giam budc

'21

</div>
<span class='text_page_counter'>(95)</span><div class='page_container' data-page=95>

song cua anh sang klch thlch thi dong nang ban
<b>cuc dai cua electron quang dien tang Cau 711.</b>
Khi chieu chum tia tu ngoai vao mot eng

nghiem dung dung dich 1luorexein thi thay
dung dich nay phat ra anh sang mau luc. Do la
hien tuong

A. phan xaanh sang B. quang - phat

quang.

1313.

hia - phat quang. D. tan
sac anh sang.

<b>Cau 712. Trong quang pho vach cua nguyen tu</b>

hidrd, budc sing dai nhat cua vach quang pho
trong day Lai-man va trong day Ban-me lan

luot la X1 va X2. Budc song dai thu hai thuoc

day Lai-man cri gia tri la

A

X

,

X

2

_

X

,

X

2

X

₁X ₂X₂- X₁

A

..

12

.

.

2(X1 + X 2)

X

,

X

2

D.

X₁- X₂

<b>Cau 713. Chon cau dung. Hien tuong quang</b>

dien se khdng xay ra neu chieu anh sang ho
quang vao mot tam kem.

1314.

tlch dien am.

1315.

tlch dien duang.

1316.

khdng tlch dien.

D duoc che chrin bang mot tam thuy tinh da .

<b>Cau 714. Nang luong phdtdn cua:</b>

1317.

tia hong ngoai ldn han cua tia
tu ngoai.

1318.

tia X ldn han cua tia tu ngoai.

1319.

tia tu ngoai nha han cua anh
sang nhin thay

1320.

tia X nha han cua anh sang

thay duoc.

<b>Cau 715. Goi f</b>1, f2, f3, f4, f5 lan luot la tan sd cua

tia hong ngoai, tia tu ngoai, tia Ranghen, song
vd tuyen cuc ngan, va anh sang mau lam. Thu
tu tang dan cua tan se song duoc sap xep nhu

sau:

B. £<$<£<f2<f D.

$<$<£<$<£

X1 + X

2

C.

A £<$<£<$<£

</div>
<span class='text_page_counter'>(96)</span><div class='page_container' data-page=96>

<b>Cau 716. Trong hien tuong quang dien, dong </b>

nang ban dau cuc dai cua cac electron quang

dien: A Nho han nang luong photon chieu tdi.

1321.

Ldn han nang luong photon
chieu tdi.

1322.

Bang nang luong photon
chieu tdi.

1323.

Ti le vdi cuang do as chieu
tdi.

<b>Cau 717. Dieu nao sau day la sai khi noi den</b>

nhung ket qua rut ra tu thl nghiem vdi te bao
quang dien?

1324.

Hieu dien the giua andt va

catdt cua te bao quang dien luon cri gia tri am
khi ddng quang dien triet tieu.

1325.

Ddng quang dien vin ton tai

ngay ca khi hieu dien the giua andt va catdt cua
te bao quang dien bang khdng.

1326.

Cuang do ddng quang dien

bao hoa khong phu thuoc cuang do chum sang
kich thich.

D Gia tri hieu dien the ham phu thuoc vao
budc song cua chum sang kich thich.

<b>Cau 718. Trong cac truang hop nao sau day</b>

electron duoc goi la electron quang dien?

1327.

Electron trong day din dien
thdng thuang

1328.

Electron but ra tu catdt cua te
bao quang dien

1329.

Electron tao ra trong chat ban
din

1330.

Electron but ra khoi kim
<b>loai do nhiem dien tiep xuc Cau 719. Phat bieu </b>
nao sau day la sai khi noi ve dong nang ban

cuc dai cua cac electron quang dien?

1331.

Dong nang ban cuc dai cua

cac electron quang dien khong phu thuoc vao
cuang do chum sang kich thich.

1332.

Dong nang ban cuc dai cua

cac electron quang dien phu thuoc vao cuang do
chum sang kich thich.

1333.

Dong nang ban cuc dai cua

cac electron quang dien phu thuoc vao budc
song cua anh sang kch thlch.

D Dong nang ban cuc dai cua cac electron
quang dien khong phu thuoc vao ban chat cua
kim loai lam catdt. <b>Cau 720. Dieu nao sau day la</b>

sai khi noi ve quang trd?

1334.

Bo phan quan trong cua
quang trd la mot ldp ban din co gan hai dien
cuc.

1335.

Quang trd thuc chat la mot

dien trd ma gia tri dien trd cua nri cri the thay
doi theo nhiet do

1336.

Quang trd co the dung thay
the cho cac te bao quang dien

1337.

Quang trd chi hoat dong khi

anh sang chieu vao nri cri budc song ngan han
goi han quang din cua quang trd.

<b>Cau 721. Phat bieu nao sau day la sai vdi noi</b>

dung hai gia thuyet cua Bo?

1338.

Nguyen tu co nang luong xac

dinh khi nguyen tu do d trang thai ding.

1339.

Trong cac trang thai ding,
nguyen tu khdng buc xa hay hap thu nang.

C Khi chuyen tu trang thai ding co nang
luong thap sang trang thai ding co nang luong
cao nguyen tu se phat ra phdtdn.

D. O cac trang thai ding khac nhau nang
luong cua cac nguyen tu co gia tri khac nhau.

<b>Cau 722. Cac vach trong day Pasen thuoc vung</b>

nao trong cac vungsau?

A Vung hong ngoai B. Vung anh sang
nhin thay

1340.

Vung tu ngoai

1341.

Mot phan nam trong vung
anh sang nhin thay, mot phan nam trong vung
tu ngoai.

<b>Cau 723. Cac phan ung quang hoa la cac phan</b>

ung hoa hoc xay ra dudi tac dung cua

A. nhiet B. anh sang <b>C. dien D. tu Cau</b>

<b>724. Hien tuong quang dien xay ra, neu giu </b>

nguyen budc song anh sang kch thlch va tang
cuang do anh sang, ta co:

1342.

Hieu dien the ham tang len

1343.

Dong nang ban dau cuc dai
cua cac electron tang len

1344.

Cuang do ddng quang dien
bao hoa tang len

1345.

Cac quang electron den andt
<b>vdi van tec ldn han Cau 725. Chon cau dung:</b>

1346.

Hien tuong quang dien chung
to anh co tlnh chat song

1347.

Hien giao thoa chung to anh
sang co tlnh chat hat

</div>
<span class='text_page_counter'>(97)</span><div class='page_container' data-page=97>

_ D Hien tuong quang dien chung to anh
sang cri tinh chat hat <b>Cau 726. Gidi han quang</b>

dien cua moi kim loai dung lam catod trong te

bao quang dien phu thuoc vao yeu te nao trong
cac yeu te sau:

1349.

budc song anh sang kch thlch

1350.

nang luong lien ket rieng cua
hat nhan nguyen tu

C nang luong lien ket cua electron ldp ngoai
cung vdi hat nhan nguyen tu

D. cau truc tinh the cua kim loai dung lam
catod

<b>Cau 727. Chon cau Dung. Neu chieu mot chum</b>

tia hong ngoai vao tam kem tlch dien am, thi:

1351.

tam kem mat dan dien tlch
duang.

1352.

Tam kem mat dan dien tlch
am.

1353.

Tam kem trd nen trung hoa
ve dien.

1354.

dien tlch am cua tam kem
khdng doi.

<b>Cau 728. Chon phat bieu dung. Vdi mot buc xa</b>

co budc song thich hop thi cuang do ddng
quang dien bao hoa:

1355.

Triet tieu, khi cuang do chum
sang kich thich nho han mot gia tri gidi han.

1356.

ti le vdi binh phuang cuang
do chum sang.

C. ti le vdi can bac hai cua cuang do chum
sang.

D ti le vdi cuang do chum sang.

<b>Cau 729. Ddng quang dien dat den gia tri bao </b>

hda khi

A Tat ca cac electron bat ra tu catdt khi catdt
duoc chieu sang deu di ve duoc andt.

1357.

Tat ca cac electron bat ra tu
catdt khi catdt duoc chieu sang deu quay trd ve
duoc catdt.

1358.

Cri su can bang giua sd
electron bat ra tu catdt va sd electron bi hut quay
trd lai catdt.

1359.

Sd electron di ve duoc catdt
<b>khdng doi theo thai gian. Cau 730. Chon cau </b>
Dung. anh sang huynh quang la:

1360.

ton tai mot thai gian sau khi
tat anh sang kch thlch.

1361.

hai nhu tat ngay sau khi tat
anh sang kch thlch.

1362.

co budc song nhi han budc
song anh sang kch thich.

1363.

do cac tinh the phat ra, sau
khi duoc kch thlch bang anh sang thich hop.

</div>
<span class='text_page_counter'>(98)</span><div class='page_container' data-page=98>

A. duoc phat ra bdi chat ran, chat long lin
chat khl. B. hai nhu tat ngay sau khi tat anh sang
klch thlch.

C. cri the ton tai rat lau sau khi tat anh sang
kch thlch. D. cri
budc song nho han budc song anh sang klch
thlch.

<b>Cau 731. Chon cau sai</b>

1364.

Su phat quang la mot dang

phat anh sang pho bien trong tu nhien.

1365.

Khi vat hap thu nang luong

dudi dang nao do thi ni phat ra anh sang, do la
phat quang.

C Cac vat phat quang cho mot quang pho
nhu nhau

D. Sau khi nging klch thlch, su phat quang

mot se chat cdn

keo dai mot thai gian nao do.

<b>Cau 732. Chon cau sai</b>

1366.

Huynh quang la su phat

quang co thai gian phat quang ngan (dudi 10-8_s)

1367.

Lan quang la su phat quang

co thai gian phat quang dai (ti 10-6_{s) trd len..}

C Budc song

X'

anh sang phat quang bao
gia nho han budc sring

X

cua anh sang hap
thu

X'

<

.

D. Budc song

X'

anh sang phat quang bao

gia cung ldn han budc song

X

cua anh sang

hap thu

X' >X

D. moi anh sang dan sac co budc song ldn

han X2 <b>. Cau 733. Noi dung chu yeu cua thuyet </b>

luong tu truc tiep noi ve

1368.

su hinh thanh cac vach quang
pho cua nguyen tu.

1369.

su ton tai cac trang thai ding
cua nguyen tu hidrd.

1370.

cau tao cua cac nguyen tu,
phan tu.

D su phat xa va hap thu anh sang cua nguyen
tu, phan tu. <b>Cau 734. Trong thi nghiem vdi te</b>

bao quang dien, khi chieu chum sang kich thich
vao catet thi ci hien tuong quang dien xay ra. De
triet tieu ddng quang dien, nguai ta dat vao giua
andt va catdt mot hieu dien the goi la hieu dien
the ham. Hieu dien the ham nay cri do ldn

1371.

lam tang tec electron
(electron) quang dien di ve andt.

1372.

phu thuoc vao budc song cua
chum sang kich thich.

1373.

khong phu thuoc vao kim
loai lam catdt cua te bao quang dien.

1374.

ti le vdi cuang do cua chum
sang kich thich.

<b>Cau 735. Khi chieu lan luot hai buc xa co tan sd</b>

la f1, f2 (vdi f1<f2) vao mot qua cau kim loai dat

cd lap thi deu xay ra hien tuong quang dien vdi

dien the cuc dai cua qua cau lan luot la V1, V2.

Neu chieu dong thai hai buc xa tren vao qua cau
nay thi dien the cuc dai cua no la

A (V + V2). B.

I

V1 - V2

I .

C V2. D. V1.

<b>Cau 736. Khi nii ve thuyet luong tu anh sang,</b>

phat bieu nao sau day la dung?

1375.

Nang luong photon cang nho

khi cuang do chum anh sang cang nho.

1376.

Photon ci the chuyen dong

hay dung yen tuy thuoc vao nguon sang chuyen
dong hay dung yen.

1377.

Nang luong cua phdtdn cang

ldn khi tan se cua anh sang ung vdi phdtdn do
cang nho.

D. Anh sang duoc tao bdi cac hat goi la
photon. <b>Cau 737: Dieu nao sua day sai khi noi </b>

ve hien tuong quang dien ngoai

1378.

La hien tuong khi chieu anh

sang thi lam bat ra cac e khoi be mat quang dien

1379.

Anh sang vung tu ngoai de

gay ra hien tuong quang dien han anh sang nhin
thay

C Khi chieu anh sang vao be mat mot kim

loai thi lam bat ra cac e

D. Kim loai kiem de gay ra hien tuong quang
<b>dien han so vdi nhung kim loai khac Cau 738: </b>
Chon phat bieu dung

1380.

Chieu chum tia tu ngoai vao

mot tam kem tlch dien duang thi tam kem se bi
mat dan dien tlch duang

1381.

Hien tuong quang dien chi

xay ra khi

X > X

0 (

X

0 la gidi

han quang dien)

C Trong te bao quang dien khi UAK < 0 vin

co ddng quang dien

D. Cac kim loai khac nhau co gidi han quang
dien la nhu nhau

</div>
<span class='text_page_counter'>(99)</span><div class='page_container' data-page=99>

1382.

Khong cri e nao bat ra tu
Katot nua

1383.

Ddng

quang dien chay tu K den

A C Khong cri e nao chay
den duoc Anot D. Vi UAK

< 0 nen ddng quang dien I
< 0

<b>Cau 740: Chon phat bieu dung. Khi ddng quang</b>

dien dat gia tri bao hda

1384.

Khdng co e nao bay dien
duoc Anot

1385.

Khi UAK tang thi ddng quang

dien khdng tang nua C Tang cuang do sang

thi B khdng doi

D. Khi tang nang luong chum sang thi B
<b>khdng doi Cau 741 : Chon phat bieu sai?</b>

1386.

Hien tuong quang dien xay ra
<i>khi anh sang klch thlch co budc song A bang</i>

gidi han quang dien A0

1387.

Khi chieu anh sang kch thlch
thi cuang do ddng quang dien bao hda ti le
thuan vdi cuang do chum sang kich thich

1388.

Dong nang ban cuc dai
khdng phu thuoc vao cuang do anh sang kich
thlch

1389.

Hien tuong quang dien xay ra

khi budc song anh sang kich thich

X < X

0

<b>Cau 742: De gay ra hien tuong quang dien, buc </b>

xa roi vao kim loai phai thoa man dieu kien A

Nang luong photon ldn han cdng thorit

1390.

Tan sd ldn han mot gia tri nao
do

1391.

Tan sd nho han mot gia tri
nao do

1392.

Nang luong photon nhd han

<b>mot gia tri nao do Cau 743: Chi ra khang dinh </b>
sai

A. Photon co nang luong B. Photon co dong
luong

C. Photon ci khei luong

</div>
<span class='text_page_counter'>(100)</span><div class='page_container' data-page=100>

<b>Cau 744: Chon cau phat bieu dung? Nguai ta</b>

thay e bat ra khoi be mat kim loai khi chieu
chum sang dan sac vao no. Do la

vi:

1393.

Chum sang co cuang do qua

nho

1394.

Kim loai hap thu lt anh sang
do

C Cong thoat cua e nho han so vdi nang
luong photon D. Budc song cua anh sang ldn
han gidi han quang dien

<b>Cau 745: Chon cau dung? E quang dien co dong</b>

nang ban
cuc dai khi

1395.

Photon anh sang tdi co nang
luong ldn nhat

1396.

Cdng thoat e co nang luong
ldn nhat

1397.

Nang luong

ma e thu duoc la ldn nhat D

Nang luong ma e mat di la
nho nhlit

<b>Cau 746: Chon phat bieu sai? Dong nang ban</b>

cuc dai cua e quang dien

1398.

Khong phu thuoc vao cuang

do chum sang kich thich

1399.

Phu thuoc vao

budc song anh sang kich thlch

C Khong phu thuoc ban chat
kim loai lam catot

D.Phu thuoc va hdt giua anot va katot

<b>Cau 747: Mot quang dien trd co dac diem nao </b>

dudi day?

1400.

dien trd tang khi nhiet do tang

1401.

dien trd giam khi nhiet do
giam

1402.

dien

trd tang khi bi chieu

sang D dien trd giam

khi bi chieu sang

<b>Cau 748: Chon y dung. Hien tuong quang din la</b>

hien tuong

1403.

Din song anh sang bang cap

quang

1404.

tang nhiet

do mot chat khi bi chieu

sang C giam dien trd mot

chat khi bi chieu sang

D. thay doi mau cua mot chat khi bi chieu
sang

<b>Cau 749: Chon y dung. Co the giai thlch hien</b>

tuong quang din
bang thuyet

A. electron co dien B. sing anh

sang

C photon D. dong hoc
phan tu

<b>Cau 750: Chon cau dung. Hien tuong quang</b>

dien trong la hien
tuong

1405.

but e ra khoi be mat kim loai
khi bi chieu sang

1406.

giai phong e ra khoi mdi lien
ket trong chat ban din khi bi chieu sang

1407.

giai phong e ra khoi kim loai
bang cach ddt nong

1408.

giai phong e ra khoi mot chat bang
<b>cach ban pha ion Cau 751: Linh kien nao dudi </b>
day hoat ddng dua vao hien tuong quang din

A. te bao quang dien B. quang trd

C. LED D. Nhiet dien

trd

<b>Cau 752: Trong truang hop nao dudi day co the</b>

xay ra hien tuong quang dien? Anh sang chieu
vao

A. mat nudc bien B. la cay

C. mai ngrii D kim loai

khdng san

<b>Cau 753: Khi chieu anh sang mau vang vao mot</b>

vat lieu thi thay co e bat ra. Tam kim loai do chc
chrin la

A. kim loai B. kim loai

kern

C. chat cach dien D. chat huu ca

<b>Cau 754: Chon phat bieu sai: ddng quang dien</b>

dat den gia tri bao hda khi

1409.

Tat ca cac e but ra trong moi
giay deu chay ve anot

1410.

Ngay ca nhung e co van tec

nhd nhat cung chay ve anot

C Cri su can bang cua e bay ra khoi K va e bi
hut ve K D. Khong cri e nao bi anh sang but ra
<b>quay trd lai Katot Cau 755: Chon phat bieu sai</b>

</div>
<span class='text_page_counter'>(101)</span><div class='page_container' data-page=101>

1412.

Nguyen tut d trang thai ding
co muc nang luong thap nh£it goi la trang thai
ca ban

C Nguyen tu d trang thai kch thlch la trang
thai co muc nang luong thap

D. Trong cac trang thai ding cua nguyen tu, e
chuyen dong quanh hat nhan tren quy dao co
<b>ban knh xac dinh Cau 756: Chon cau sai?</b>

1413.

Khi nguyen tu hap thu mot

photon thi ni chuyen ti muc nang luong thap
sang muc nang luong cao han

1414.

Khi nguyen tu phat ra mot

photon thi e nhay ti trang thai ding ben ngoai
vao ben trong

C Khi nguyen tu hap thu mot photon thi e
nhay tu trang thai ding tu ben ngoai vao ben
trong

D. Khi nguyen tu phat ra mot photon thi nri
chuyen tu trang thai ding co muc nang luong
cao xudng muc nang luong thap han

<b>Cau 757: Trang thai ding la</b>

A. Trang thai khdng chuyen dong cua hat
nhanB . Trang thai hat nhan khdng dao dong

1415.

Trang thai dung yen cu
nguyen tu

1416.

trang thai on dinh cua he
thdng nguyen tu

<b>Cau 758: Xet muc nang luong E</b>K, EL, EM cau

nguyen tu Hidro. Mot photon co nang luong

bang EM - EK bay den gap nguyen tu nay.

Nguyen tu nay se

1417.

khong hap thu

1418.

hap thu nhung khdng chuyen
trang thai

1419.

hap thu chuyen tu K len L roi
len M

1420.

hap thu chuyen tu K len M

<b>Cau 759: Chi ra cau co noi dung chlnh xac cua </b>

cac tien de ve cac trang thai ding. Trang thai

ding la A trang thai co nang luong xac dinh

1421.

trang thai ma ta ci the ta co
the xac dinh nang luong cua

ni

1422.

trang thai ma nang luong
nguyen tu khdng the thay doi duoc

1423.

trang thai trong do nguyen tu
co the ton tai mot thai gian xac dinh ma khong
buc xa nang luong

<b>Cau 760: Cau nao sau day noi len noi dung</b>

chlnh xac cua khai niem ve quy dao ding cua
thuyet nguyen tu Bo?

1424.

Quy dao co ban knh ti le vdi
binh phuang cua cac sd nguyen lien tiep

1425.

Ban kinh quy dao co the tlnh
mot cach chlnh xac

</div>
<span class='text_page_counter'>(102)</span><div class='page_container' data-page=102>

D Quy dao ung vdi nang luong trang thai
ding <b>Cau 761: Chon cau co noi dung dung</b>

1427.

Cac vach pho trong day

Lai-man, Ban-me, Pa-sen hoan toan nam trong
vung anh sang khac nhau

1428.

Vach co budc song dai nhat

cua day Lai-man ci the nam trong vung anh
sang nhin thay

C Vach co budc song ngan nhat cua day
Ban-me cri the nam trong ving tu ngoai

D. Vach co budc song dai nhat cua day
Ban-me cri the nam trong vung anh sang nhin thay

<b>Cau 762: Chon cau co noi dung sai?</b>

A Day Ban-me ung vdi su chuyen tu cac quy
dao ding ben ngoai ve quy dao N

1429.

Day Pa-sen ung vdi su
chuyen tu cac quy dao ding ben ngoai ve quy
dao M

1430.

Day Lai-man ung vdi su
chuyen tu cac quy dao ding ben ngoai ve quy
dao K

1431.

Day Ban-me gom cac vach

nam trong vung tu ngoai va mien anh sang nhin
thay

<b>Cau 763: O trang thai ding, nguyen tu</b>

1432.

khong buc xa va khong hap
thu nang luong

1433.

khong buc xa nhung co the
hap thu nang luong

1434.

khong hap thu nhung co the
buc xa nang luong

1435.

vin co

the hap thu va buc xa

<b>Cau 764: Chon y dung. </b>

Tam knh do

1436.

hap thu manh anh sang do

1437.

hap thu lt anh sang do

1438.

khong hap thu anh sang xanh

1439.

hap thu lt
anh sang

xanh <b> Cau</b>

<b>765: Chon</b>

phat bieu sai?

1440.

Anh sang co budc song khac

nhau thi bi mdi truang hap thu khac nhau

1441.

Moi chat deu hap thu co chon
loc anh sang

C Nhung chat trong suet la nhung chat hap
thu anh sang manh nhat

D. Vat khdng hap thu anh sang nhin thay la
vat trong suet khong mau

<b>Cau 766: Phat bieu nao sau day sai? Dong nang</b>

ban cuc dai cua e quang dien

1442.

phu thuoc vao budc song
chum sang kich thich va ban chat kim loai la
Katot

1443.

phu thuoc vao hdt UAK cua

TBQD

1444.

khong phu thuoc vao cuang
do chum sang kich thich

1445.

phu thuoc vao hdt UAK

<b>Cau 767: Trong thi nghiem hien tuong quang</b>

dien ngoai su dung TBQD thi nhan xet nao sau
day dung?

1446.

Gia tri hdt ham khong phu
thuoc budc song kch thlch

1447.

Ddng quang dien triet tieu khi

UAK < 0

1448.

Gia tri hdt ham khong phu

thuoc vao ban chat kim loai lam Catot

1449.

Ddng quang dien ton tai ca
khi UAK=0

<b>Cau 768: Khi mot photon di tu khdng khl vao</b>

tam thuy tinh thi nang luong cua no se

A. Khdng doi B. giam
C. tang^_______________D. khdng xac
dinh duoc

<b>I</b>

<b>CIU'ONG VII. VAT I V HAT </b>
<b>NHAN</b>

<b>AV ---</b><i><b></b></i>

<b>H---*---"---Cau 769. Phat bieu nao sau day la dung.</b>

1450.

Hat nhan nguyen tu A_{X duoc}

cau tao gom Z natron va A proton.

1451.

Hat nhan nguyen tu A_{X duoc}

cau tao gom Z prdton va A natron.

1452.

Hat nhan nguyen tu "ZX duoc

cau tao gom Z prdton va (A - Z.) natron.

1453.

Hat nhan nguyen tu A_{X duoc}

cau tao gom Z natron va (A+Z) proton.

<b>Cau 770. Phat bieu nao sau day la dung.</b>

1454.

Hat nhan nguyen tu duoc cau
tao ti cac prdton.

1455.

Hat nhan nguyen tu duoc cau

</div>
<span class='text_page_counter'>(103)</span><div class='page_container' data-page=103>

1456.

Hat nhan nguyen tu duoc cau
tao ti cac natron.

1457.

Hat nhan nguyen tu duoc cau

tao ti cac prdton va cac natron.

<b>Cau 771. Phat bieu nao sau day la dung.</b>

1458.

Dong vi la cac nguyen tu ma

hat nhan cua chung co se khei A bang nhau.

1459.

Dong vi la cac nguyen tu ma

hat nhan cua chung co se proton bang nhau, se
natron khac nhau.

1460.

Dong vi la cac nguyen tu ma

hat nhan cua chung co se natron bang nhau, sd
prdton khac nhau.

1461.

Dong vi la cac nguyen tu ma

hat nhan cua chung co khdi luong bang nhau.

<b>Cau 772. Dan vi nao sau day khdng phai la dan</b>

vi khdi luong nguyen tu.

A kg; B. MeV/c. C. MeV/c2_{. D. u.}

<b>Cau 773. Dinh nghia nao sau day ve dan vi khei </b>

luong nguyen tu u la dung.

1462.

u bang khei luong cua mot

nguyen tu Hydrd 11H

1463.

u bang khdi luong cua mot
hat nhan nguyen tu Cacbon

C u bang j! khdi luong cua mot hat nhan

nguyen tu

Cacbon 1
62C

D. u bang Y

2

khdi luong cua mot nguyen tu

Cacbon 1₆C

<b>Cau 774. Hat nhan </b>238U cri cau

tao gom:
A 238p va 92n;

B. 92p va238n;

1464.

238p va 146n;

D 92p va 146n

<b>Cau 775. Phat bieu nao sau </b>

day la dung.

</div>
<span class='text_page_counter'>(104)</span><div class='page_container' data-page=104>

1465.

Nang luong lien ket la nang
luong toa ra khi cac nuclon lien ket vdi nhau tao
thanh hat nhan.

1466.

Nang luong lien ket la nang

luong toan phan cua nguyen tu tlnh trung binh
tren sd nuclon.

1467.

Nang luong lien ket la nang

luong lien ket cac electron va hat nhan nguyen
tu.

<b>Cau 776 Chon phat bieu nao dung. Phong xa la</b>

hien tuong mot hat nhan

1468.

phat ra mot buc xa dien ti

1469.

tu phat ra tia phong xava bien
thanh mot hat nhan khac.

1470.

tu phat ra cac tia

a, p, y.

1471.

phing ra cac tia phing xa, khi
bi ban pha bang nhung hat chuyen dong nhanh.

<b>Cau 777. Phat bieu nao sau day la sai khi noi ve </b>

tia anpha

1472.

Tia anpha thuc chat la hat

nhan nguyen tu heli ( 4₂He )

1473.

Khi di qua dien truang giua

hai ban tu dien, tia anpha bi lech ve phla ban am
tu dien.

1474.

Tia anpha phring ra tu hat

nhan vdi van tec bang van tec anh sang.

1475.

Khi di trong khdng khl, tia

anpha lam ion hoa khdng khl va mat dan nang
luong.

<b>Cau 778. Phat bieu nao sau day la sai khi noi ve </b>

tia

p

-

.

A. Hat

p

- thuc chat la electron. B. Trong

dien truang, tia

p

-bi lech ve phla ban duang

cua tu dien, lech nhieu han so vdi tia

a.

C Tia p-_{cri the xxuyen qua mot tam chi day}

ca xentimet.

D. Tia p-_{cri the xxuyen qua tam chi day ca}

<b>milimet. Cau 779. Trong cac bieu thuc sau day, </b>
bieu thuc nao dung vdi noi dung cua dinh luat

phong xa (vdi m0 la khdi luong cua chat phring

xa ban dau, m la khdi luong chat phong xa cdn
lai tai thai diem t, X la hring sd phong xa)

B. m m0.e D. m = -m0.eC. m = m.0e

<b>Cau 780. Dieu nao sau day la sai khi noi ve do </b>

phong xa H.

1476.

Do phong xa H cua mot chat

phong xa la dai luong dac trung cho tlnh phong
xa manh hay yeu la luong phong xa do.

1477.

Vdi mot chat phong xa cho

trudc, do phong xa ludn la mot hang se.

1478.

Vdi mot chat phong xa cho

trudc, do phong xa giam dan theo quy luat ham
se mu theo thai gian.

1479.

Bieu thuc cua

dinh luat phong xa la H=H0e -xt

-X<b>_{. Cau 781. Phring xa p la}</b>

1480.

phan ung hat nhan thu nang
luong.

1481.

phan ung hat nhan khdng thu

va khong toa nang luong. C phan ung hat

nhan toa nang luong.

D. su giai phong electron ti ldp electron
ngoai cung cua nguyen tu.

<b>Cau 782. Hat nhan cang ben vung khi co A. se </b>

nucldn cang nho. B. se nucldn cang ldn.

1482.

nang luong lien ket cang ldn.

D nang luong lien ket
rieng cang ldn. <b>Cau 783. </b>

Phat bieu nao la sai?

1483.

Cac dong vi phong xa deu
khdng ben.

1484.

Cac nguyen tu ma hat nhan

co cung se prdtdn nhung co sd natron (natron)
khac nhau goi la dong vi.

C Cac dong vi cua cung mot nguyen td co sd
natron khac nhau nen tinh chat hoa hoc khac
nhau.

D. Cac dong vi cua cung mot nguyen td co
<b>cung vi trl trong bang he thdng tuan hoan. Cau </b>

<b>784. Phan ung nhiet hach la su</b>

A ket hop hai hat nhan rat nhe thanh mot hat
nhan nang han trong dieu kien nhiet do rat cao.

1485.

ket hop hai hat nhan co se

khei trung binh thanh mot hat nhan rat nang d

nhiet do rat cao.

1486.

phan chia mot hat nhan nhe

thanh hai hat nhan nhe han kem theo su toa
nhiet.

-Xt

A. m 0 = m.e

</div>
<span class='text_page_counter'>(105)</span><div class='page_container' data-page=105>

1487.

phan chia mot hat nhan rat
nang thanh cac hat nhan nhe han.

<b>Cau 785. Khi nii ve su phong xa, phat bieu nao</b>

dudi day la dung?

1488.

Su phong xa phu thuoc vao

ap suat tac dung len be mat cua khdi chat phong
xa

1489.

Chu ki phring xa cua mot
chat phu thuoc vao khdi luong cua chat do.

C Phring xa la phan ung hat nhan toa nang
luong. D. Su phong xa phu thuoc vao nhiet do
<b>cua chat phong xa Cau 786. Phat bieu nao sau </b>
day la dung.

1490.

Phing xa la hien tuong hat

nhan nguyen tu phat ra song dien ti.

1491.

Phing xa la hien tuong hat

nhan nguyen tu phat ra cac tia a, P, Y.

C Phring xa la hien tuong hat nhan nguyen tu
phat ra cac tia phring xa va bien doi thanh hat
nhan khac.

D. Phring xa la hien tuong hat nhan nguyen
tu nang bi pha vo thanh cac hat nhan nhe khi
<b>hap thu natron. Cau 787. Ket luan nao ve ban </b>
chat cua cac tia phong xa dudi day la khdng
dung.

1492.

Tia P la ddng hat mang dien.

1493.

Tia a, P, Y deu co chung ban

chat la song dien tu co budc sring khac nhau

1494.

Tia Y la song dien ti.

1495.

Tia a la

ddng cac hat nhan nguyen tu.

<b>Cau 788. Ket luan nao dudi </b>

day khdng dung.

1496.

Do phong xa la dai luong dac
trung cho tlnh phong xa manh hay yeu cua mot
luong chat phong xa

1497.

Do phong xa la dai luong dac
trung cho tlnh phong xa manh hay yeu cua mot
chat phong xa

1498.

Do phong xa phu thuoc vao

ban chat cua chat phong xa, ti le thuan vdi sd
nguyen tu cua chat phong xa

1499.

Do phong xa cua mot luong

chat phong xa giam dan theo thai gian theo qui
luat qui luat ham sd mu.

<b>Cau 789. Phan ung nhiet hach </b>

</div>
<span class='text_page_counter'>(106)</span><div class='page_container' data-page=106>

1500.

su tach hat nhan nang thanh
cac hat nhan nhe nha nhiet do cao.

1501.

phan ung hat nhan thu nang
luong.

1502.

phan ung ket hop hai hat
nhan co khdi luong trung binh thanh mot hat
nhan nang.

<b>Cau 790. Phat bieu nao sau day la khdng dung.</b>

1503.

Tia a la ddng cac hat nhan

nguyen tu Heli 4₂He .

1504.

Khi di qua dien truang giua

hai ban cua tu dien tia a bi lech ve phla ban am.

1505.

Tia a ion hia khong khi rat
manh.

D Tia a cri kha nang dam xxuyen manh nen
duoc su dung de chua benh ung thu.

<b>Cau 791. Phat bieu nao sau day la khdng dung.</b>

1506.

Hat p+_{va hat}

p

- _{cri khdi}

luong bang nhau.

1507.

Hat

p

+ va hat

p

- duoc

phong ra ti cung mot dong vi phring xa

1508.

Khi di qua dien truang giua

hai ban tu hat

p

+ va hat

p

-bi lech ve hai

phla khac nhau.

1509.

Hat

p

+ va hat

p

- duoc

phong ra co van tdc bang nhau va gan bang van
tec anh sang. .

<b>Cau 792. Chon cau tra lai dung. Trong mot phan</b>

ung hat nhan, tong khei luong cua cac hat nhan
tham gia A. duoc bao toan. B. Tang.

C. Giam. D. Tang hoac giam

tuy theo phan ung.

<b>Cau 793. Trong day phan ra phring xa </b>

—

»

20

872Y cri bao

nhieu hat

a

va

p

duoc phat ra.

A 3

a

va 7

p.

B. 4

a

va 7

p

.

C. 4

a

va

8

p.

D. 7

a

va 4

p

<b>Cau 794. Phat bieu nao </b>

sao day la sai khi noi ve do phong xa (hoat do
phong xa)?

1510.

Do phong xa la dai luong dac
trung cho tlnh phong xa manh hay yeu cua mot
luong chat phong xa

1511.

Dan vi do do phong xa la
becaren.

1512.

Vdi moi luong chat phong xa

xac dinh thi do phong xa ti le vdi sd nguyen tu
cua luong chat do.

D Do phong xa cua mot luong chat phong xa
phu thuoc nhiet do cua luong chat do.

<b>Cau 795. Chon cau dung. Su phan hach la su vo</b>

mot hat nhan nang

1513.

thuang xay ra mot cach tu

phat thanh nhieu hat nhan nang han.

1514.

Thanh hai hat nhan nhe han

khi hap thu mot natron.

C thanh hai hat nhan nhe han va vai natron,
sau khi hap thu mot ntrron cham.

D. Thanh hai hat nhan nhe han, thuang xay

ra mot cach tu

phat.

<b>Cau 796. Phat bieu nao sau day la sai khi noi ve</b>

phan ung hat nhan.

A Phan ung phan hach la phan ung hat nhan
tao ra hai hat nhan nhe han, co tlnh phong xa.

B. Khi hat nhan nang hap thu mot natron vo
thanh 2 hat nhan trung binh va toa nang luong
ldn.

1515.

Khi hai hat nhan rat nhe ket

hop vdi nhau thanh hat nhan nang han toa nang
luong.

1516.

Phan ung tong hop hat nhan

va phan hach deu toa nang luong.

<b>Cau 797. Chon cau dung: Su phan hach la su vo</b>

mot hat nhan nang

1517.

Mot cach tu phat thanh nhieu
hat nhan nhe han.

1518.

Thanh hai hat nhan nhe han
do hap thu mot natron.

C Thanh hai hat nhan nhe han va vai natron,
sau khi hap thu mot natron cham.

D. Thanh hai hat nhan nhe han mot cach tu
<b>phat. Cau 798. Chon cau sai. Phan ung day </b>
chuyen

1519.

la phan ung phan hach lien
tiep xay ra.

1520.

luon kiem soat duoc.

1521.

xay ra khi se natron trung
binh nhan duoc sau moi phan hach ldn han 1.

1522.

xay ra khi sd natron trung
binh nhan duoc sau mdi phan hach bang 1.

</div>
<span class='text_page_counter'>(107)</span><div class='page_container' data-page=107>

1523.

Phan ung hat nhan day

chuyen duoc thuc hien trong cac ld phan ung
hat nhan

1524.

Ld phan ung hat nhan co cac

thanh nhien lieu (urani). da duoc lan giau dat
xen ke trong chat lam chan natron.

C Trong ld phan ung hat nhan co cac thanh
dieu khien de dam bao cho he se nhan natron
ldn han 1.

D. Cri cac dng tai nhiet va lam lanh de truyen
nang luong cua ld ra chay tua bin.

<b>Cau 800. Chon cau dung. Phan ung nhiet hach</b>

la phan ung hat nhan

1525.

toa ra mot nhiet luong ldn.

1526.

can mot nhiet do cao mdi
thuc hien duoc.

1527.

hap thu mot nhiet luong ldn.

1528.

trong do, hat nhan cua cac

nguyen tu bi nung nong chay thanh cac nuclon.

<b>Cau 801. Chon phuang an dung. Phan ung nhiet</b>

hach va phan ung phan hach la hai phan ung hat
nhan trai nguoc nhau vi

1529.

mot phan ung toa, mot phan
ung thu nang luong.

1530.

mot phan ung xay ra d nhiet

do thap, phan ung ka xay ra d nhiet do cao.

C mot phan ung la tong hop hai hat nhan nhe
thanh hat nhan nang han, phan ung kia la su pha
vo mot hat nhan nang thanh hai hat nhan nhe
han.

D. mot phan ung dien bien cham, phan ka rat
<b>nhanh. Cau 802. Chon cau sai.</b>

1531.

Nguon gec nang luong mat

trai va cac vi sao la do chuoi lien tiep cac phan
ung nhiet hach xay ra.

1532.

Tren trai dat con nguai da
thuc hien duoc phan ung nhiet hach: trong qua
bom goi la bom H.

C Nguon nhien lieu de thuc hien phan ung

nhiet hach rat re kiem, vi do la dated va triti co
san tren nui cao.

</div>
<span class='text_page_counter'>(108)</span><div class='page_container' data-page=108>

<b>Cau 803. Phat bieu nao sau day la dung.</b>

1533.

Phing xa la hien tuong hat

nhan nguyen tu phat ra song dien ti.

1534.

Phing xa la hien tuong hat

nhan nguyen tu phat ra cac tia a, P, Y.

C Phring xa la hien tuong hat nhan nguyen tu
phat ra cac tia khong nhin thay va bien doi
thanh hat nhan khac.

D. Phring xa la hien tuong hat nhan nguyen
tu nang bi pha vo thanh cac hat nhan nhe khi
<b>hap thu natron. Cau 804. Ket luan nao ve ban </b>
chat cua cac tia phong xa dudi day la khdng
dung.

1535.

Tia Y la song dien ti.

1536.

Tia a, P, Y deu co chung ban

chat la song dien ti co budc sring khac nhau

1537.

Tia P la ddng hat mang dien.

1538.

Tia a la ddng

<b>cac hat nhan nguyen tu. Cau </b>

<b>805. Ket luan nao dudi day </b>

khdng dung.

1539.

Do phong xa la dai luong dac
trung cho tlnh phong xa manh hay yeu cua mot
luong chat phong xa

1540.

Do phong xa la dai luong dac
trung cho tlnh phong xa manh hay yeu cua mot
chat phong xa

1541.

Do phong xa phu thuoc vao

ban chat cua chat phong xa, ti le thuan vdi sd
nguyen tu cua chat phong xa

1542.

Do phong xa cua mot luong

chat phong xa giam dan theo thai gian theo qui
luat qui luat ham sd mu.

<b>Cau 806. Phat bieu nao sau day la khdng dung.</b>

1543.

Tia a la ddng cac hat nhan

nguyen tu Heli 4

2 He .

1544.

Khi di qua dien truang giua

hai ban cua tu dien tia a bi lech ve phla ban am.

1545.

Tia a ion hia khong khi rat
manh.

D Tia a cri kha nang dam xuyen manh nen
duoc su dung de chua benh ung thu. <b>Cau 807. </b>

Phring xa P la

1546.

phan ung hat nhan thu nang
luong.

1547.

phan ung hat nhan khdng thu

va khong toa nang luong. D phan ung hat

nhan toa nang luong.

C. su giai phong electron ti ldp electron

ngoai cung cua

nguyen tu.

<b>Cau 808. Hat nhan Triti ( T</b>13 ) cri

1548.

3 nucldn, trong do co 1
prdtdn.

1549.

3 natrdn (natron) va 1 prdtdn.

1550.

3 nucldn, trong do co 1
natrdn (natron).

1551.

3

prdtdn va 1 natrdn
<b>(natron). Cau 809. </b>
Phat bieu nao la sai.

1552.

Cac dong vi phong xa deu
khdng ben.

1553.

Cac nguyen tu ma hat nhan

co cung se prdtdn nhung co sd natrdn (natron)
khac nhau goi la dong vi.

C Cac dong vi cua cung mot nguyen td co sd
natrdn khac nhau nen tinh chat hoa hoc khac
nhau.

D. Cac dong vi cua cung mot nguyen td co
cung vi trl trong bang he thdng tuan hoan.

<b>Cau 810JNang luong lien ket rieng la nang </b>

luong lien ket

1554.

tinh cho mot nucldn.

1555.

tinh rieng cho hat nhan ay.

1556.

cua mot cap prdtdn-proton.

1557.

cua mot cap prdtdn-natrdn.

<b>Cau 811. Trong qua trinh phan ra hat nhan U</b>92238

thanh hat nhan 234_{U, da phring ra mot hat a va}

hai hat

A. natrdn . B. electron . C. poztron D.

<b>proton . Cau 812. Trong su phan hach cua hat </b>

nhan 235_{U, goi k la he}

sd nhan natron. Phat bieu nao sau day la dung.

1558.

Neu k < 1 thi phan ung phan

hach day chuyen xay ra va nang luong toa ra
tang nhanh.

1559.

Neu k > 1 thi phan ung phan
hach day chuyen tu duy tri va cri the gay nen
bung no.

1560.

Neu k > 1 thi phan ung phan
hach day chuyen khdng xay

ra.

1561.

Neu k = 1 thi phan ung phan
hach day chuyen khdng xay

</div>
<span class='text_page_counter'>(109)</span><div class='page_container' data-page=109>

<b>Cau 813. Gia su hai hat nhan X va Y co do hut</b>

khdi bang nhau va sd nucldn cua hat nhan X ldn
han sd nucldn cua hat nhan Y

thi

A hat nhan Y ben vung han hat nhan X.

1562.

nang luong lien ket rieng cua
hai hat nhan bang nhau.

1563.

hat nhan X ben vung han hat
nhan Y.

1564.

nang luong lien ket cua hat

nhan X ldn han nang luong lien ket cua hat
nhan Y.

<b>Cau 814. Phring xa va phan hach hat nhan</b>

1565.

deu co su hap thu natron
cham.

1566.

deu la phan ung hat nhan thu
nang luong.

1567.

deu khdng phai la phan ung
hat nhan

D deu la phan ung hat nhan
toa nang luong. <b>Cau 815. Phan</b>

ung nhiet hach la

1568.

su ket hop hai hat nhan co sd
khdi trung binh tao thanh hat nhan nang han.

1569.

phan ung hat nhan thu nang
luong .

1570.

phan ung trong do mot hat

nhan nang vo thanh hai manh nhe han.

D phan ung hat nhan toa nang luong. <b>Cau </b>
<b>816. Cri the tang hing sd phong xa X cua dong </b>

vi phong xa bang cach

1571.

Dat nguon phong xa do vao
trong tu truang manh.

1572.

Dat nguon phong xa do vao
trong dien truang manh.

1573.

Ddt nong nguon phong xa
do.

1574.

Hien nay chua co cach nao de
thay doi hring sd phong xa <b>Cau 817. Nang</b>

luong san ra ben trong Mat Trai la do

1575.

su ban pha cua cac thien
thach va tia vu tru len Mat Trai.

1576.

su ddt chay cac hidrdcacbon
ben trong Mat Trai.

1577.

su phan ra cua cac hat nhan

urani ben trong Mat Trai. D su ket hop cac

hat nhan nhe thanh hat nhan nang han.

<b>Cau 818. Chon cau dung.</b>

A Cri the coi khdi luong hat nhan gan bang
khdi luong nguyen tu.

</div>
<span class='text_page_counter'>(110)</span><div class='page_container' data-page=110>

1578.

Dien tlch nguyen tu bang
dien tlch hat nhan.

1579.

Cri hai loai nucldn la proton
va electron.

<b>Cau 819. Muen phat ra buc xa, chat phong xa</b>

trong thien nhien can phai duoc klch thlch bdi
A. Anh sang Mat Trai. B. Tia tu ngoai.

C. Tia X. D Khong can

kch thlch.

<b>Cau 820. Cap tia nao sau day khdng bi lech</b>

trong dien truang va ti truang.

A. Tia

a

va tia

p.

B. Tia

y

va tia

p.

C Tia

y

va tia Ranghen. D. Tia

p

va tia
<b>Ranghen. Cau 821. Tinh chat nao sau day </b>

khong phai la tinh chat chung cua cac tia

a,

p

va

y.

1580.

Ci kha nang ion hoa chat khl.

1581.

Bi lech trong dien truang va ti
truang.

1582.

Ci tac dung len phim anh.

1583.

Co mang nang luong.

<b>Cau 822. Trong qua trinh phring xa cua mot</b>

chat, sd hat nhan phring xa

1584.

giam deu theo thai gian.

1585.

giam theo duang hypebol.

1586.

khong giam.

D giam theo quy luat ham
sd mu. <b>Cau 824. Tim phat </b>

bieu sai ve do hut khdi

1587.

Do chenh lech giua khdi

luong m cua hat nhan va tong khdi luong mo

cua cac nucldn cau tao nen hat nhan goi la do
hut khdi.

1588.

Khdi luong cua mot hat nhan

ludn nho han tong khdi luong cua cac nucldn
cau tao thanh hat nhan do.

1589.

Do hut khdi cua mot hat nhan
ludn khac khdng.

D Khdi luong cua mot hat nhan ludn ldn han
tong khdi luong cua cac nucldn cau tao thanh
hat nhan do. <b>Cau 825. Phan ung hat nhan nhan </b>

tao khong cri cac dac diem nao sau day.

1590.

toa nang luong.

1591.

tao ra chat phong xa.

1592.

thu nang luong.

D nang luong ngh duoc
bao toan. <b>Cau 826. Thuc chat </b>

cua phong xa betatri la

1593.

Mot prdtdn bien thanh 1
natrdn va cac hat khac.

1594.

Mdt natron bien thanh mot
prdtdn va cac hat khac.

1595.

Mot phdtdn bien thanh 1
natrdn va cac hat khac. D. Mot photon bien
thanh 1 electron va cac hat khac.

<b>Cau 827. Chon cau sai trong cac cau sau</b>

1596.

Phring xa

y

la phring xa di

kem theo cac phring xa

a

va

p.

1597.

Photon

y

do hat nhan
phong ra co nang luong ldn.

C Tia

p

- la cac electron nen no duoc phong
ra tu ldp vo nguyen tu. D. Khong cri su bien
doi hat nhan trong phong xa

y.

<b>Cau 828. Cac hat nhan nang (urani, plutoni..) va</b>

cac hat nhan nhe (hidrd, heli,...) cri cung tinh
chat nao sau day

1598.

co nang luong lien ket ldn.

1599.

De tham gia phan ung hat
nhan.

1600.

tham gia phan ung nhiet
hach.

1601.

g

ay phan ung day
<b>chuyen. Cau 829. </b>
Chon phuang an sai

1602.

Mac du hat nhan nguyen tu

duoc cau tao ti cac hat mang dien cung dau
hoac khdng mang dien nhung hat nhan lai kha
ben vung.

1603.

Luc hat nhan lien ket cac
nucldn co cuang do rat ldn so vdi cuang do luc
tuang tac giua cac prdtdn mang dien tlch duang.

C Luc hat nhan la loai luc cung ban chat vdi
luc dien ti.

D. Luc hat nhan chi manh khi khoang cach
giua hai nucldn bang hoac nho han kch thudc
<b>cua hat nhan. Cau 830. Chon cau sai</b>

1604.

Cac hat nhan co sd khdi trung
binh la ben vung nhat.

</div>
<span class='text_page_counter'>(111)</span><div class='page_container' data-page=111>

C Hat nhan co nang luong lien ket cang ldn
thi cang ben vung.

D. Hat nhan co nang luong lien ket rieng
cang ldn thi cang ben vung.

<b>Cau 831. Chu ki ban ra cua mot chat phong xa</b>

la khoang thai gian de

1606.

qua trinh phring xa lap lai
nhu luc dau

1607.

mot nua sd nguyen tu chat ay
bien doi thanh chat khac.

1608.

khdi luong ban cua chat ay
giam di mot phan tu.

1609.

hing sd phong xa cua chat ay
giam di cdn mot nua.

<b>Cau 832. Trong phan ung hat nhan phan hach,</b>

nhung phan tu nao sau day co dong nang gop
nang luong ldn nhat khi xay ra phan ung.

1610.

Dong nang cua cac natron.

1611.

D

ong nang cua

cac prdton . C

Dong nang cua
cac manh. D.
Dong nang cua
cac electron.

<b>Cau 833. Gia su hai hat nhan X va Y co do hut</b>

khdi bang nhau va sd nucldn cua hat nhan X ldn
han sd nucldn cua hat nhan Y

thi

A hat nhan Y ben vung han hat nhan X.

1612.

hat nhan X ben vung han hat
nhan Y.

1613.

nang luong lien ket rieng cua

hai hat nhan bang nhau.

1614.

nang luong lien ket cua hat

nhan X ldn han nang luong lien ket cua hat
nhan Y.

<b>Cau 834. Phring xa va phan hach hat nhan</b>

1615.

deu co su hap thu natron
cham.

1616.

deu la phan ung hat nhan thu
nang luong.

1617.

deu khdng phai la phan ung
hat nhan

D deu la phan ung hat nhan
toa nang luong. <b>Cau 835. Hay </b>

chon cau dung.

1618.

Trong ion dan nguyen tu so
prdtdn bang sd electron.

1619.

Trong hat nhan se prdtdn
bang se natron.

1620.

Trong hat nhan se prdtdn

bang hoac nho han se natron. D Luc hat

nhan co ban knh tac dung nhohan ban knh
nguyen tu.

</div>
<span class='text_page_counter'>(112)</span><div class='page_container' data-page=112>

1621.

Hat nhan nguyen tu duoc cau
tao ti cac prdtdn.

C Hat nhan nguyen tu duoc cau tao ti cac
prdtdn va cac natron.

1622.

Hat nhan nguyen tu duoc cau
tao ti cac natron.

D. Hat nhan nguyen tu duoc cau tao ti cac
prdtdn, natron va electron.

<b>Cau 837. Dong vi cua mot nguyen tu da cho</b>

khac nguyen tu do ve:

A Sd hat natron trong hat nhan.

1623.

Se hat natron trong hat nhan

va se electron tren cac quy dao.
D. Sd electron tren cac quy dao.

1624.

Sd hat prdtdn trong hat nhan

va sd electron tren cac quy dao

<b>Cau 838. Hat nhan </b>2₈₄Po dang dung yen thi

phring xa a, ngay

sau phring xa do, dong nang

cua hat a A ldn han dong

nang cua hat nhan con.

1625.

chi co the nho han hoac bang

dong nang cua hat nhan con.

1626.

bang dong nang cua hat nhan
con.

1627.

nho han

dong nang cua hat nhan con.

<b>Cau 839. Phat bieu nao sau </b>

day la dung.

1628.

nang luong lien ket la toan bo
nang luong cua nguyen tu gom dong nang va

nang luong nghi.

1629.

Nang luong lien ket la nang

luong toa ra khi cac nucldn lien ket vdi nhau tao
thanh hat nhan.

1630.

Nang luong lien ket la nang

luong toan phan cua nguyen tu tlnh trung binh
tren sd nucldn.

1631.

Nang luong lien ket la nang

luong lien ket cac electron va hat nhan nguyen
tu.

<b>Cau 840. Trong cac phan ung hat nhan khdng co</b>

su bao toan

A dong nang. B. dong luong.
C. nang luong toan ph<an D. dien tlch.

<b>Cau 841. Khi phring xa </b>

a

, so vdi hat nhan
me thi hat nhan con d vi trl nao .

A. Tien 1 d. B. Tien 2 d C. lui 1 o. D Lui

2 o. <b>Cau 842. Chat phring xa do Becaren phat </b>

hien ra tien la

A. radi. B. urani. C. thori. D. poloni.

<b>Cau 843. Tia </b>

p

- khong cri tinh chat nao sau
day .

1632.

Mang dien tlch am.

1633.

Ci van tec ldn va dam xuyen
manh.

C Bi lech ve ban am khi xxuyen qua tu dien.

D. Lam phat quang mot se chat.

<b>Cau 844. Chu ky ban ra cua mot chat phong xa</b>

la thai gian sau
do:

1634.

hien tuong phong xa lap lai
nhu cu.

1635.

1/2 sd hat nhan cua chat
phong xa bi phan ra.

1636.

do phong xa tang gap 2 lan.

1637.

khei luong cua chat phong xa
tang len 2 lan so vdi khei luong ban dau.

<b>Cau 845. Buc xa nao sau day co budc song nho </b>

nhat.

A. Tia hong ngoai. B. Tia X.

C. Tia tu ngoai. D. Tia

y

.

<b>Cau 846. Chi ra cau sai trong cac cau sau:</b>

1638.

Tia

a

gom cac hat nhan
cua nguyen tu heli.

1639.

Tia

p

+ gom cac hat co

cung khdi luong vdi electron nhung mang dien
tlch nguyen td duang.

1640.

Tia

p

- la cac electron nen
khong phai phong ra ti hat nhan.

1641.

Tia

a

bi lech trong dien

truang lt han tia

p

.

<b>Cau 847. Cac tia duoc sap xep theo kha nang </b>

xuyen thau tang

dan khi ba tia nay xuyen qua khong khi la

A

a

,

p

,

y

B.

a

,

y

,

p

C.

p

,

y

,

a

D.

y

,

p

,

a

</div>

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