ĐỀ THI THỬ ĐẠI HỌC MÔN LÝ - TRƯỜNG ĐẠI HỌC TỰ NHIÊN pot

DE
THr rrilI EAr ugc NAna
zorc
-
LAN I
MON:
VAT LY
Thdi
gian
ldm bdi. 90
philr,
(50
cdtt
ndc nghiQtn)
Me
d6 thi 136
C6u
l: Cho
cuong
dQ Arrr chuAn
la 10
-r2
W/m2.
Tai di€m c6
cud'ng dQ Am ld 10
-5
W/m2 thi mfic
cuong
dQ
Am ld bao
nhi6u?

A. 50
dB.
B. 50 B.
c. 70 dB.
D.70 B.
Cdu
2: M6
men
qu6n
tinh
cua vdt rin
dOi
v6'i
m6t truc
quay
c6 dintr
A. chi
phu thudc
vdo kh6i
luo'ng crja
v6t.
B.
kh6ng
phu
thu6c
vdo kich
thu6c
vd hinh
dang cria
vAt.

C.
phU thu6c
vdo
t6c dQ
quay
crJra vit.
D.
phU
thudc
vdo
vitri trpc
quay cria vAt.
Ciu 3:
Trong
m6itrud'ng
ndo bi€n
dQ dao
ddng
giAm chdm nh6t?
D. DAu.
A. DAu
r6t nh6t.
B. Khdng
khi.
C.
Nu6c.
Ciu
4: Cho
do4n mach
diOn xoay

chi6u
gdm
cuQn
ddy
mac nOi
ti6p v6i tu di€n. DQ
lQch
pha
cira
di€n
dp
giira hai diu cuQn
ddy so
vo'i
cud'ng
dQ
dong
di€n
trong mach
ld
1.
Oien 6p hiQu
dung
gi0'a
hai
-
dAu
tu diQn b6ng
Jg
tAn

diQn 6p
hi6u
dung
giila
hai
dAu cu6n
day. DQ l€ch
pha cria diQn
dp
gi0a
hai
dAu
cu6n
dAy so
voi diQn
6p
gifi'a
hai dAu
do4n m4ch
tr€n ld
D4I HQC
QUOC
GIA
HA
NqI
TRUO'NG
DAI HQC
KHOA H9C Tu
NHITN
trnAi Prrn

Chuy€n
VQt
ti,
A.0.
B.
7I
2
A. 2n
A.40 m/s
8.80
m/s
C,7\
3
C.
2n
C.20 m/s
D. 160 m/s
D.2n
3
Ciu
5: Chqn
ph6t
bi€u
dring?
A. Trong
dao
ddng cu6ng
bric,
tAn sd
dao dQng

1u6n bang
tdn sd dao
d6ng ri6ng.
B. Trong
dd'i s6ng
vd
kTthudt,
dao ddng
cdng
huong
lu6n lu6n c6 lq'i.
C. Trong
doi s6ng
vd
ki
thudt, dao
d6ng
tat dAn
tu6n ludn
c6 hai'
D.
Trong
dao ddng
duy
tri tAn sd
dao dQng
chi
phu
thudc
vAo ddc tfnh cira h€

dao d6ng.
cau 6:
Nguyen
tic
thu s6ng
v6 tuytin
dua
vdo hien
tuo, ng
chinh ndo duo'i
d6y?
B.2nE
1e-u
D.2nE
X
g*u
A. Hiqu
rl'ng Ddp-ple.
B. CQng
huong.
C.
Giao
thoa s6ng.
D.
Cdm
0'ng
di6n tt ,
CAu
7: Con
lic ld

xo
gdm vat250
gmhc vdo ld
xo
c6 dQ cilng ld
100
N/m.
Dua
vAt d6n
vitrf c6 lid0
t-
Z cm
r6i veo
tho'i di6m
t =
0 thi tiuy€n
cho
v4t
vdn
t5c ld 40 cm/s hu6'ng
v€ vi tri c6n bing.
Phuong
trinh
dao dQng
cria
con ldc
ld
A. 2rlisin(2}t+
nl
4)(cm)

C. 2^D
sin(z}t
-3n
/ 4)(cm)
B. 2J7sin(20t
-
n/a)(cm)
D. 2",,D sin( 20t
+
3nl
4)(cm)
CAu 8:
Con
l6c
don treo trong
mQt.thang
m6y
chuy6n
dQng chQm
dAn d€u l€n
trOn v6i
gia
tdc c6
d0
ld'n
ld a. Chu
ki
dao ddng
cta
con ldc

ld
CAu 9:
M6t
so. i
dAy kim
lo4i
cdng
gif,ra
hai di€m
c6
dinh cdch nhau
2,4 m. Ddt m6t
nam chAm
vinh
criu
gAn
rg:i
day.
Khi cho
dong
diQn xoay
chi€u
tAn sd
25 Hz thi tren
dAy
quan
sdt duo.
c
s6ng
dirng

v6'i
3 br,rng
s6ng.
Vdn
t6c truyOn
s6ng
tr6n
ddy ld:
CAu
10:
Trong
m6t
doan
m4ch RLC
khdng
phdn
nhdnh
g6m
diQn tr6'R: 100
fJ, cuQn thuAn
cdm L
=
l/n
(H)
vd m01ty
diQn
c6 diQn
dung bi6n
thi6n.
HiQu

diqn thC
xoay
chi€u ddt.vio
hai dAu
mach di€n
c6
tdn tO f
= SO
ffr.
DiQn dung
C criatu
di€n bing
bao nhi6u
thi hiQu
di6n thii hieu
dungtr€n
tu diQn
bing
hiQu
diQn
th6 hiQu
dung ddt
vdo hai
dAu mach
diqn?
Trang 1/5
-
Ma
dA thi 136
A.

mirc
cuong
dQ
am.
C.
cudng
dd
dm-
Cflu
13:
MOt
v0t
dao
ddng
diAu
A.
10
-4
lQn)
\F)
B. 10
-4
/n
(F)
c.
10-3
lQn)(F)
D. l0
-3
/n

(F)
CAu
l1:
Trong
ddng
co kh6ng
ddng
bO
ba
pha:
A. r0
to
quay ld
Jo
t6c dpng
ctra
til
truong
gAyboi ddng
diQn ba
pha trong
ba
cu6n
d[y.
B.
t6c dQ
quay cira
rdto
khdng
phu thudc

viro
tAn s6
quay c[ra
til tru'ong.
c.
r6to
quay
ld
do
duo-c
kdo boi
m6t
bQ
phan kh6c
o'ben
ngo2ri
dQng
co.
D.
dong
diqn
ba
pha trong
ba
cu6n
cidy
la
do
rdto
quay

tao
ra'
C6u
12:
Am sic
ld
I dec
tru'ng
sinh
l;i
cira
Am
phu thudc
viro
dbc
tinh
vAt
ly ndo
cira
Am ?
B.
bi€n
do
6m-
D.
dd
thi
dao
ddng
Am.

hoi
v6.i
phuong
trinh
x=Acos(rot+<p).
Tai
thdi
di6m
pha c0a
dao
ddns
ld
3nl4
th\:
s theo chi6u ciuons
v
rc
chidu
du'ong
cta
truc
toa d0'
'
.i.
vat
chuy6n
dQng
theo
chidu
ciu'ong

v6'i
gia
t6c.
huong
ngu'r
B.
v6t
c6
van
t6c
v-d
gia
t5c
cirng
hu6'ng
theo
chi6u
duo'ng
cita truc
tga
d0'
;.
;;r1,"vA"-AO^g
iguqr
cniei
auo'n[
v6'i
gia
tOc.hu6'ng
theo

chidu
duong
cfia
truc
toa d0'
D.
vdt
cO
van
t6c
vi
glu
iO" cung
hud'ng
nguo-c
chiiiu
du'ong
cua
truc
toa
d6'
CAu
14:
Trong
mach
dao dQng
g6m tu.di6n
c6
di6n
dung

C
:2
PF
va
cuQn
cAm
c6
d6
tu
cAm
L:
l0
mH.
Ning
luo-ng
cua mach
dao
dQng
bdng
bao
nhi6u
ntiu
vdo
tho'i
di6m
cuo'ng
dQ
ddng
di€n
qua

cu6n
cam
bang
1a
thi
hiQu
diQn
th€ tr6n
tu
diQn
ld
100V
A.
15mJ
B.5mJ
C'10mJ
D'25mJ
ciu
15:
chon
cau
dfng'
ltuin
hodn
theo
thoi
gian thi
dao
dong
MotvdtdaodOngchiut6cdungciram6tngoailucbienthi€r

on
dinh
cua
vQt co:
a.
uien
d6
dao
dQng
phu thu6c
vdo
ca
ngo4i
luc
vd
d4c
tinh
c0a
h€.
B.
tAn
s5
dao
dQng
chi
phu thu6c
vdo
cudng
d0
cira

ngoai
luc'
C.
tAn sd
dao
dQng
ph\rthudc
vdo
dac
tinh
cira
hq
vd
cia
ngoai
lu'c'
D.
bi6n
dd
dao
dQng
khdng
phu thu6c
vdo
ngoai
luc'
Ciu
16:
Chon
c6u

dirng'
C6c
diOm
nim
trOn
cing
phuong
truydn
s6ng
sE
dao
dQng.nguo.
c
pha
khi
chiing
c5ch
nhau
A.
s6
nsuy€n
lAn
bu6'c
s6ng.
B'
sO 16
ldn bu6c
s6ng'
;: ;5
ffiian

tin
nr,a
bu6.c
song.
n.
so
te lAn
n6'a bu6'c
song.
Ciu
17:
Tr€n
mlt
chft
long
c6
hai
ngudn
ph6t s6ng
c6
cung
bi€n
dd,
cirng
tAn-s6
25
Hz
vd
cirng
pha'

Khoang
c6ch
giira hai nguSn
s6ng
lJ5
crn.
van
trli
truyen
song
la
20
cm/s.
K6t
ludn
ndo
sau
ddy
ld
oung
/
A.
C6
13
vdn
cuc
daivd
12
vdn
cr,rc

ti6u'
C.
C6
12vln
cuc
daivd
12
vAn
cuc
tieu'
B. C6
lzvAn
cuc
dai
vd
13
vAn
cuc
ti6u'
D.
C6
13
vAn
cuc
dai
vd 13
vAn cuc
ti€u.
B.5
m/s.

C.
500
m/s.
B.
n
=4ocos(l
oont
-[)V)
D. 50
cm/s.
cau
18:
Cho
m6t
s6ng
ngang
truyan
tr€n
day
c6
phuong
trinh: u
=
5cos(l0t-0,02x)'
trong
d6
u vd
x
tinh
bing

cm,
t
tlJi#;
gjav
frl
Toc
d0
aao
JEng
cuc dai
cira
phAn tri tr€n
dAy
khi
c6
s6ng
truvan
qua
ld
A.
100
crn/s.
Ciu
19:
Con
lic
ld
xo
gdm
vat nhd

mic
v6'i
ld
xo
co
d6
cirng
80
N/m.
Trong
mQt
chu
ky
dao
ddng
.o',
far
di
duq.c
qudng
Oirong
ta
ZO
cm.
Ndng
luo-ng
dao dQng
cia
con
lic

ld:
A.
1000
J
8.0,+
J
c.4
J
D'
0,1
J
Cf,u
20:
TOc
d0
truy€:n
s6ng
co hgc
trong
mdt
m6i
truong
phu
thudc
vdo
A.cudngdQs6ng.!.ujenf0cnangrrons6ng.
C.
bAn
cnat
mOi

trud'ng
truydn
s6ng.
D'
tAn
s6 song'
Chu2l:Dat
diCn
6p
xoay
chibu
v?ro
doan
mach
RLC
mic
nt5i
tii5p.
BiCt
R:
10O,
cuQn
cAm thuAn
c6
L:
t
10r

'
r-

7T
_
(H),tudifncoC=
,-
(r)vaorgnapgifrahai
dAucuoncdmthuAnld
Ltr.=20^JZcos(l00n'1+-\(v)'
lon
zlt
-*'^'
"'-*" '-
l'
2'
Bi€u
thilc
diQn
dp
gifr'a hai
dAu
doan
m4ch
l2r
A.
tr
=4oJ7cos1l
oont-|ltv)
Trang215
-
Ma
dA

thi 136
C|,u
22: Tai ngu6n O
phuong
trinh dao ddng cira s6ng
ld a
=
l. cos
(10
ttt) . Y dn t6c truydn
s6ng
trong
mdi
truo'ng
ld v =
4
rnls. Tim nhAn xdt sai khi n6i
vA
quii
trinh truy€n
s6ng
trong
rndi tru'd'ng ndy?
A. Li
dd dao d6ng cira di6m
M
tai tho'i di6m t vd t
*
0,2s ld nhu
nhau.

B. Hai di€m A, B
c6ch
nhau 0,4m
lu6n dao d6ng ngu'oc
pha
nhau.
C. S6ng tr6n
mdt nu6'c c6
br"rd'c
s6ng l": 0,8m.
D.
Cfic
phdn
til nu6'c
kh6ng
chuy€n do'i
theo s6ng.
Cdu 23: Mdy
biiin
rip
ld thitit bi
A. ldm
tdng cdng su6tcira
dong diQn xoay
chidu.
B. c.6
khA ndng
bit5n ddi diQn 6p
cira dong diQn
xoay chidu.

C.
bi€n dOi
dong
di6n
xoay
chidu thdnh
dong diQn
mdt chidu.
D. bi6n
dditin
s5 cia ddng di6n
xoay chid:u.
Cdu24:
Tim chu
k!
dao
ddng nh6 cira mdt
thanh mAnh d6ng
chAt
chi6u ddi L=20
cm xung
quanh
^J
m6t truc
ndm ngang
di
qua
m6t
dAu cira thanh.
A. 0,45 s.

B. 0,9 s.
C.
0,73
s. D. 0,37 s.
CAu
25:
S6ng
co hoc c6 tAn
s6
f.:50H2,
v6n t6c
truy€n
s6ng ld v trong d6
3,5m/s
<v <4,5m1s.
Hai
di6m
A,
B tr€n mdt
phuo-ng
truydn s6ng
c6ch nhau 18cm ludn dao d6ng vu6ng
pha
v6'i nhau.
Gi6
tri
cira v
ld
A.3,75mls
\

B. 4,5rn/s
C.4mls
D.4,25mls
CAu
26: TOng
ho.p cria hai dao
d0ng di6u
hda cirng
phu'o-ng
xr
=
Asin(Znt-n/3)
vd
Xz
=
Acos(2nt-n/3)
ld dao d6ng
c6
phuong trinh:
c. rr
=4oJ7cos(i
ooz,l +[)V)
a.
AlDsin
(Znt
-
n
l12)
.
C.2Acos(Znt)

D.
tt
=4ocos(l
00nt+f,lVl
B. 2Asin(2nt).
D. AJ2 sin
(2nt
+ nl 4)
B.5cm
D. kh6ng dCI dfr' tiQu d€
x6c dinh.
Cdu27z Mdt
ngudn Am
ph6t
Amcoi
nhu mQt ngudn
di6m vd ph6t.dm
trong kh6.ng khi.theo mgi
hu6'ng.
GiA
s0' mdi
trud'ng kh6ng h6p thq
Am. Khi tbng khoang cdch d6n ngudn l6n
g6p.
hai lAn thi
A. mfic
cud'ng dQ Am
gidm
di.hai lAn.
B. mri'c cuong

dQ 6m
gidm.di
bdn
lAn.
C.
cudng
d6 Am
giAm
di hai lAn.
D. cudng
dQ
6m giAm
di bdn lAn.
Cdu 28: Chon c6u sal.
Edt
vdo hai dAu
mdt tu di6n m6t hiqu
diQn th6 xoay
chiAu
c6 bi€n dQ kh6ng dOi vd tAn s6 thay ddi
duo-c thi:
di6n s6m oha so vdi I
la
900.
A. cudng d0
ddng
diQn s6m
pha
so
v6i hi€u diqn

th€ mdt
g6c
B.
c6ng
sudt
ti€u thu bdng khdng.
C.
biOn dQ ddng diQn tj'l€
thudn v6itAn
s6 c[ta
hiQu diQn th0.
D. bi€n
d6 dong dien ri lQ
nghlch vdi
di€n dung
c0a tU
diQn.
CAn 29: Con
l6c lo xo treo
thing dring.
Vdt m
dang dilng
ydn,
truydn cho v6t m vAn t5c
v
hudng
''l
!
1'
^

'
''
isau At
=4s
vqt
dilng lai lAn dAu vd khi d6 ld xo
bi
gi6n
15cm. LAy
g
=
tnang
dung xuong tn
20
lu'ng lal
lan oau
va Knl oo lo xo
Dl
glan
l0m/s2. Bi€n
dd dao ddng
c0a v6t ld
A.
15cm
C. i0cm
Ciu 30: Ph6t
bi€u
ndo
sau
d6y dirng khi

n6i vd vAt rin
quay quanh
truc
quay
cO Ointrt
A. Momen
luc
t6c
dr,rng
l€n vQt bing kh6ng
thi vdt dilng
y€n
hoqc
quay
ddu.
B. Mgt
diOm b6t kj,ndm 6'tr€n
vAt khi ndo ciing co,giat6c
ti6p tuy6n
khiic kh.ong
.
C. MOt
diOm bAt
kj, ndm
o'tr0n
vQt ludn
c6 cA
gia
t6c hu'6'ng tdm vd
gia

t6c ti€p
tuy€n.
D. Momen
lpc tiic
dung l0n vdt duong thi
ludn lim
vdt
quay
nhanh dAn.
CAu
3l:
TAn
sd
crja suAt diQn dQng
tao bo'i m6y
phdt
di€n xoay chidLr m6t
pha
ld 50H2. RO to c6
6
cf,p cuc. TOc d0
quay
cta 16 to ld:
A. 500
vdng/phirt.
B. 600
vongiphftt.
CAu
32: Giao
thoa

ld hiqn
trro-ng:
D.
1200
vong/phfrt.
Trang
3/5
-
Ma dA thi 136
C. 1500 vongiphrit.
A. tdng
hop c6cdao
dQng cilng
phu.ong
cing
tAn
s6 cira ciic
s6ng
truy6n
d6n
cung m6t
di6m.
B.
haiiOng
truyOn
d6n ctng m-gi
AiC*
lim cho
phAn tir mditrud'ng
tai do

dao ddng
v6'i bi€n
dO
, J .;
bang
tong bi€n d0
cila hai ngu6n.
C.
cOng hu'o'ng
cila
dao ddng
ri€ng
c0a
phAn tri'mdi
trudng
vd dao ddng
crr'6ng
b6'c
gAy
boi
ngudn
s6ng.
O. tOng
hop c5c
dao ddng ciing
phu'ong cing
tAn s6
vd
ciing
pha

cira
c6c song
truy€n
ddn
cung
nTdt
',
A
drem.
CAu
33: Eid:u
ndo sau
dAy sai
khi noi
vir mriy
ph6t
diOn
xoay
chidu 3
pha
?
A. Nguy6n
t6c
hoat
d6ng cira
Tdy 9Uu
tr€n hi€n
tu'o.
ng
c6m

ring di6n
tir.
B. Tfi
tO
qr^y cua roto bing
tAn
s6
cira
sudt
diQn
ddng
do mdy
ph6t
ra.
C.
M6i ru9n
iay
cta
phAn rlng c6
mdt
su6t
diQn
dQng
mang
mQt
tAn sd kh6c
nhau.
o. Ci ifr6
*a"
giien

tir: m6y
phTt
di6n
xoay
chibu
ba
p1a
dtin
noi sil dung
bing
c6ch
m6c
tam
gidc
hodc hinh
sao,
Cf;u
34: Cho
mech
di€n xoay
chidu
R,
L, C
mic
nOi.ti6p.
Di6n 6p
hiQu dung
hai dAu
tq di0n,
cuon

day
thuin
cdm
vd hai dA mach
lin lugt le
20 V, 60
V
vd
50
V.
KCt
lu4n
ndo sau dAy
Id d[ng?
A.
Cudng
dQ ddng
di6n
tri'c thd'i
scrm
pha hon
di6n
dp
hai dAu mech
la
I
'
4
B. Kh6ng
dn dir

kiqn
ae
tintr dQ 16ch
pha
gifr'a
cudng
d6 ddng
di€n
vir di6n 6p
hai diu
mach.
C.
HQ sd c6ng
suAt
cira
dogn mach
lil
0,6.
D.
Cud'ng
dQ ddng
diqn
tri'c
thoi tr6
pha hon
diQn
6p hai
dAu
mach ld
I

'
4
Cdu
35:
Mdmen
d6ng ll-rorrg
cila mQt
vAt
rin
quay
qr-ranh truc c6
dinh l]r 5kg.m2ls,
ddng
nang
quay
cira
vAt d6 le
25J.
Tdc
dQ
g6c
cira
vAt
ld
A.
0,5
rad/s.
B. 10 radls.
C,2A
radls.

D.
5 rad/s.
CAu
36:
MQt
ilng dAy
c6 di6n
tr6'r.vd
hQ s6
tu cAm
L.
Dat vao
hai dAu.6ng
ddy
mQt
diQn
rip khong
d6i
6V,
rhi cudng
O9
aOng
di6n
trong 6ng
dAy
la 0,124.
Dat
vdo haidAu 6ng-dAymQt
diQn
6p xoay

chidu
cO
iAn rO
SOftr
vd
gi61r!
hiQu
dung
100V
thi
cu'o'ng
dQ
ddng di€n
hiQu dr,rng
trong
6ng
dAy
ld 1A. GiA
tri
cria r
vd L
ld
A. r:50O
;
L:0,5H
C.r=1000;L:0,28H
B. r:
100Q
;
L:0,5H

D.r:50f);
L:0,28H
B. nguo-c
pha.
C.
lOch
pha
nhau 900.
D. lQch
pha
nhau
1200.
Cdu
37:
Trong
mach
dao dQng
diQn
tir,
cud'ng
d6
ddng di6n
qua
cu6n
cZLm
vd di6n
tfch
tr6n
tu di€n
bitin

thi6n
A.
cirng
pha.
cau
38: Ta
ggi
c6c dQng
co sil
dpng
tir
trud'ng
quay
ld
kh6ng
d6ng bQ
vi roto cria
n6:
A.
quay v6'i tin
sr5 nho
hon
tAn s6
quay
cira
tu
trudng'
B.
quay
ngugc

chiAu
quay
cira
tu
trucng.
C.
quay vdi tAn
s6 l6n
hon tAn
s5
quay crla
til
trub'ng.
D.
quay kh6ng
dAu
khi nhanh
khi
chdm
phu thu6c
vdo
tdi'
Cdu
39:
VAn
t6c cta
s6ng
di€n
tir
A.

khdng
phLr thudc
vdo mOi
truong
truyAn
song
v.a
tAn s6 cia s6ng
B.
phU thudc
vdo m6i
trud'ng
trr,ry€n
s6ng
vd
tdn s6
c0a s6ng'
C.
phU thu6c
vdo
mdi tru'o'ng
truy0n
s6ng
vd bu6'c
s6ng.
O.
^t<frOng
php thuQc
vdo
mdi tru'dng

truytn
s6ng,
nhung
phu thu6c
vdo tAn s6
cua s6ng-
Cdu
40:
Phdt bi€u
nio sau
ddy sai
khi n6i
vC
Oign
til
tru'd'ng
A.
Khi
ril
trud.ng
bi6n
thi€n
theo
thd'i
gian
thi n6
sinh ra
di€n truo'ng.
B. Dub.ng
s6'c

cria
di€n truong
xo6y
ld
nhffng
dudng
cong
kh6ng khdp
kin.
C.
Khi
diQn
truong
bi6n
thi€n
theo
thoi
gian,
n6
sinh
ra tir trudng.
D.
TiI'trud'ng
xo6y
c6 duo'ng
c6m
ri'ng
til
bao
quanh

c6c duo'ng
silc di€n
trud'ng.
CAu
41:
C6ng
huo'ng
ld hiQn
tuong
bi€n
d0
dao
dQng:
-
a,.,t1uy
O6ItuAn
h-oan
theo thoi-gian
khitAn
s5
cua
ngoai
h-rc bing tAn
s5 cira
dao
d6ng tr,r
do.
n. cO
gia
tr!

khOng
dOi khi
ngo4i
lq'c
cdn bing
v6i luc
ma s6t'
C. c6
gi6
tri l6'n nhAt
khi
vAt dao
ddng
chiu
tric dr,ing
cira
ngoqi luc
thich
hop.
Trang
415
- Ma dc
thi 136
D.
c6
gia tri ld'n nhAt khi
lch6ng c6 h,rc
ma sdt t6c
dLrng
l€n vdt.

Ciu
42: Trong
mach dao
dOng
gdm
tu di€n
c6 di6n
dung
C
vii
cu6n cAm
c6 dd
tu'cdLm L xuAt
hi6n
dao d6ng Oigit.
HiQu
diQn t[e;uc
dai tr€n
tu
di€n
ld
U.
Vdo m6t thoi di6m,
hi6u
diQn th6
tr6n tu
diqn
ld u
thi cud'ng dQ ddng
di€n

qua
cu6n
cirm khi
d6
ld:
tr
A. u. /-
VL
B.
(u
-,)\F
c.
CAu
43: Coi
tan tAm cria
nhd
mdy
co'khi sil.1
canh
du'dng Nguy6n
TrEi
ph6t 6m
tAn s5
+:0.Ht M6t
nguo'i c6ng
nhan
ra ve
lsOm;
di xe
may

v6i t6c
dd 54
km/h
trdn duong
d6
sO
nghe
duo-c dm
tAn s6 bao
nhi0u? Cho
t6c
dQ dm
thanh
trong khdng
khi
ld 340
m/s'
A.
430 Hz.
B. 378,5
Hz.
C.
470 Hz.
D.
450 Hz'
CAu
44: MOt mdi,
thu thanh
v6
tuy6n don

gi6n
g6m
ft nhAtc6c
bd
phAn
sau:
l: anten
thu;
II: mach
t6ch s6ng;
III:
mach
khu6ch
dai dao d6ng
di6n tu
cao tAn;
IV:
mach khut5ch
dai dao
dQng
diQn
tir 6m
tAn;
V:
loa'
C6c
b0
phAn trong
so- AO mOl
cira

mdy
thu thanh
cdn x6p theo
thri'tu ndo?
D.u
D. I-II-III-IV-V.
D. cr-rc
ngin.
A. i-III.IV-II-V.
B. I.III-II-IV-V
C.
I-II-IV-III.V.
Cdu
45: Song
v6
tuy6n c6
tAn
sd
l5
MHz
thudc
dAi
s6ng.
A. dei.
B. trr"rng
C.
ngan.
Cdu
46: Mach
chon song

cira m6y
thu s6ng
v6
tLry6n
g6rn
cudn dAy c6
d6 tu cAm
0,04 mH
vd tu di6n
c6
diqn dung
ld 16
nF. Bu'6'c s6ng
cira s6ng
vd
tuy6n
md m6y
thu du'o-c ld
A. 150
m
B. 15 m.
C.
i,5 m.
n r<n^*
I'. IJUU ITI.
Ch,u
47t Trong
mach
dao ddng
diQn

til
li tuo'ng
c6
dao dQng diQn
til di6u hod
v6'i tAn s5
g6c
a:
5.l06rad/s.Khi
diQntfcht0'ctho'i
ciratudi€n
lit
q=JJ.tO-'Cthi
dongdi€ntri'cthdi
trongmachi:
0,054.
Di6n tich
l6n
nhAt cfta
tu di€n
ld
A.3,2.10-8
C
B. 3,0.10-8
C
c.2,0.10-8
c D.
1,9.10'8
C.
CAu

48: Khi
hidn
tuo-ng
giao
thoa
xdy rathi
tai
mot
di6m:
A.
bi€n dd
dao dQng
t4i d6 bi6n
thiOn.tuAn
hodn
theo
tho'i
gian.
B. dd
IQch
pha
cria hai s6ng
tai
d6 bi6n
thi6n
theo
tho'i
gian.
C.
pha dao-dQng

cira
phAn
iu tOi
truong
tai d6
bii5n
thi6n theo thd'i
gian.
D.
pha dao d6ng
cria
phAn
tri
m6itrud'ng
tai d6
bi6n thi6n
di0u hda theo
thoi
gian.
CAu
49: MQtvAtc6
phuo'ng
trinh
dao
dQng
ld
x=Acos(2xt-n/
3).Taithd'idi€m
t: i sthi
A.

dQng ndng
cira
vAt dat
cuc dai.
B. dQng ning cira
vAt dang tdng
l€n.
C.
dQng ndng
cira
vAt
dat
cuc
tieu.
D. dong
ndng cira vAt dang
giAm'
CAu 50:
MQt
hiQu
dien thd
xoay
chidu
c6 bi6n
dd.vd
tAn sd
kh6ng O6i dat.vao
hai
dAu cira
mdt.doqn

,
)'
^'
I
'd
'rA
rri .',At tl rliAn Kl' it nho l€n
r6t l6n
mach
g6m
m6t bien
tro vd mdt
tu
diQn. Khi
tdng
ddn
gi6
tri diQn
tro'cta bi€n tro
tt ri
thi nhiit
luo.
ng toa
ra trdn bi6n
tro'trong
mQt
do'n
v! thd'i
gian
sO

bi6n AOi nhu th6 ndo?
A.
gilm
dAn
d6n
mdt
gi6
tri nho
nhAt sau
d6
lai
tdng l€n.
B.
gidm
d6n.
.
C. tdng
dAn
d€n m6t
gi6
tri ld'n
nhat
rOi
gidm d6n.
D.
tdng d6n.
HET

Khiii Chtty|n
Li

-
DHKHTN
- DHOG
Hd N|i,
tvww.chuyenly.edu.vn
Trang
5/5
-
Ma
de
thi 136
DAr
r{oc
Qtioc
GIA
FIA
NOI
TllU'ONG EAI
HOC
KIiOA
IIqC
TU'N{lltN
hh0i f'fl
H
('htt1,t1tt
Vitl 111
MA
(t6
rhi 513
I.

puAN
cI{uNG
cFxo
TAr
cA
cAc TfIi sINI{
(40 cau,
tri'ciu I diin cau,10).
CAu 1:
CiLdpg
d6 cldng
di6n
lirc
thd'i
cliay troirg
mach
dao
d6ng
LC l!
ttlong
lA: i:0,05sin2000t
(A).
Ctt$n
dAy c6 dQ tu,cAm L
=
iO n1g.
foi thoi
cli6il .u:d'lg
d6
dong

cli€n
tflc thdi
trong
mach bang
gi6
tri cLlong c16
ddng diQn hiQLr
clLrng thi hi6u
di6n
the
giLra hai bfrn
ttr
di6n
Id:
A. 1,264
V
[t.3,192V
c.2,828
V
D. s,056
V
Cf,u
2:
SLl triry6n song
cuc nghn
trong
tlrr-r
phdt song
vo
ttry6n

dLlocthuc hiQn
tlteo
cdch:
A. 1'ruyAn thing tir dAi
ph6t diin
mdy
thu
tai rnoi vi
trf
tr6n
mat det'
B. Truyen ttring til
ddi
ph6t ddn
v0
tinh
rOitruydn
tiL v0
tinh
c16rr nrdy thLi.
C. TrLryAn til ddi
phit vA
phzin x4
trOn
tAng
cii6n
ly d6n
miy
1ltrt.
D. PhAn xa rrhi6u

lAn
gifr'a
tAng
di6n
ly vd
mat dAt.
Ciu 3: N,lach
dao d6ng
LC
lj, tp'6ng
clirng
lAm
nrach
chorr
s6ng
cira rr6y tlttr
vd trry6n
cii6n
g6m
m6t
ctr6n ciiy
106 *.r.
c6 ci6
tu canr L
H. Cho
c
:3.10s
ui/s.
D€
thLr

cdng hLr'6ng
nQt s6ng
di6n
tLl
c6 brroc
s6ng 2:
565 nr thi
4n
di0n dLrng cira tr: cli6n
C lz\:
A.
l,131r[r
11.A,57
PrF
C.2,261-tF
D. 3,39
p F
Cf,u
4: Ciin cil vdo
cALr tao
ctia ntdy
quang
ph6,
co tlr6
noi:
A. M6i vacS mAu tr6n
kirrh
Arrh
ld
An6

clo'
sic
cira khe
6'ciia nrfy.
B. I\46i
vach nrdu tr6n
l<inh
Anh
ld
Anh
don sic
cira
lang
l<inh'
C. M6ivaclr tlitt
tr'€rr
l<irrh Anh
ld irrlt
clon
sac
cira
thALr
kinh'
D. Ce A, B, C dOu
dLing.
Cf;u 5: S6ng dirng
dr-Loc hi1[
thdph
tr6n
rr6t soi

clAy
co
hai
clALrbi bLrQc
cd
dinlr, btidc
s6ng
cira s6ng bing:
A. I(hoing c6ch
giila
hai
birng
s6ng
hoac
hainirt
s6ng
Ii6n ti6p.
B. Mqt nira chiAr,r
dAi cira
dAy.
C. Ca chidu cldi
cira dAy.
D.
Hai
lAn khoAng
c6ch
gifr.a hai
bprrg
s6ng
hoac

hai
nfrt s6ng
li6n ti6p.
Ciu 6: Khi nguydn
til dang
6n
dinh
o trang
th6i
diLng,
nguv€tr
tit:
A.Kli6ngiraprfrr,,.,l-,,,,.r!c6th6bilcx4ndngluo-ng.
B. I(hdngbiLcxanhLtngc6th€h6pthLr.ndrrglLlo-ng.
C.
C6 tn5 n6p
rlp vd bilc
x4
n[ng
luo-ng.
D. C6
nang
lLro-ng
giil nguydn
kh6ng
d6i.
Cf;u
7: Hi€Lr di€n th5
hanr
cira nrQt

t6
bdo
qlrang
di6n
Ii 1,5 V. Dat
vdo hai
clALr
an,lt
(A)
vA cat6t
(K)
cna
te
bdoqr-rangdi0ntr€nn6thi€udi,3nth6xoaychiAu:
LrAK:3cos(100nt++)ry)
KhoAngtlroi
gianDdngcliqrr
J
chay trong
te
bdo
ndy trotg
thoi
gian 2
phfrt
kti
ti1
gOc
thoi
gian

t
:
0 li:
A 40s
8.60s
C.80s
D. 120
s
DE
'r'nn{
r'{[u DAI F{qg
I{Ary
2010
-
LAN
MOF{:
VA'{'LV
Tltd'i
gian
ldm
bdi. 90
pluit,
(50
catt
tdc
nghiAnt)
Cdu 8: Tai nguoi bilh
thLiong
nghe
dLioc

16
nhilng
6rn
c6 tAn s6
vA rrflc
cud'ng
d6 Arn
nim trong
l<hoAng:
A. 16llz
<f<
2CkHz,
0 dB
<
L
<
130
dB
C.0Hz<f< 16Hz.
0dB
<
L
<
130dB
B. 20kl'lz<f< 50hHz,
0 dB
<
L
<
l30dB

D.
16l{z
{f<
201<Hz,
130
dB <
L
<
200 dB
Cf;u 9: Didu nAo dir6i
clAy
ld
sai,
khi
n6i
vd su'phdt
vA tlru s6ng
di€n tir ?
A. Tropg
rr6y thu, ,u'
,l1nn
s6ng
li
sLl
didLr
chinh
c16 dao 116ng ri0ng
cira
nrach
LC

co tAn s6
bing
tAn s6
cira
s6ng cli6n til
do
cldi
ph6t
(c6ng
hLlong).
il.
O6
ph6t
s6pg
dign itr.,
rigLr.o'ita
n.rdc
phOi
hop rn,3t
rr6y phdt
dao d6ng didLr
hira
v6i rnQt
angten'
C.
Ee
thLr
s6ng
di€n
til', lgird'ita

niic
ph6i
ho.'p
rnQt Sngten voi
m$t m4ch
dao d0ng
LC'
D. De
ph6t
s61g cliqp
tir, ngLroi
ta
mic
ph6i hop
nrdt mAy
plr6t di€n v6'i
nr6t
dngtett.
CAu
10: Cuong
cl6 dong
<Ji6n tflc
thoi
cira ddng
di6n xoary chidrr
cliay trottg ui7clt R, i,, C m5c,r6i tiep
co
-V
darrg: i=
J3sirr(l00zt-;l

i.nl
Iloi
saLrtho'i
gian
ngan
nhAtnAo
dLr6i cldytinh
tiL lirct- 0,
cLLdngclldong
6
T;
diqn tirc thoi co
gid
rri
i
-
u^'
n,
2
^I
a
-e
400
B.
1,
300
c.
1,
100
D.

1,
200
Cffu 11:
Chitiu m$t
chirrn
tia
li6ng
ngoai vAo niQt
tAm
l<6rn
tich
diQrr drri thi
A.
T6m
k6r'r.r
lrAt b6t
di61
tich
Am.
Il.
Dien
tich t6nr k6rl lth6ng
thay d6i.
C. TAm k€m
mAt b6t
di6n
tich
du'ong.
D.
Ce ba

phuong
6n A,
B, C d6Lr sai
Cf;u 12: Trong
c6ch
mic nrach
cliQir
ba
pha hltth sao:
A. hi€u
aien tn6
giiia
cl.iy
pha vd
clAy
trLrrrg hda
goi ld
hieLr
cli6n thrS dAy.
B. hi6Lr di6n tlri5
giLia
hai
dAy
pha
goi Id hi6tr di6n
th6
pha.
C. d6iv6.i
c6c
gi6rri l'lielr

dr-rngthi
hi€Lr
dien
th6 clal,gAp
.,6
lAn hi6u
cli6n
th6
pha.
D. cLrdng d6
dong diOn
tfic
thili
trorrg
cliy trurrg
hoa
bing
cud'ttg c16 dong
c1i6n tlong
ci ba
1;ha.
Ctu l3: Mdt
lrach c1i|n
xoay
chidLr
g6m c6ll, C,
L mic,,6iti6p,
a:
+F,
ctrertr

cley lf tLLotrg
c6 c1Q tir cAm
);l
I . : ,:
L
-
'
l-1.
NgLr6n cli6n
xoay
chi6u
clirt
vdo
hai
ciiiu
cira nrach
clitn
c6 hi6Lr di6n th6
ctLc dai Uo:200V,
tAn s6
f
:
lt
50 Hz" Bi6t
cu'drrg d6
dong
di6n
tirc
thoi
chay

trong
m4ch
s6tr
pha
7f
6
so
vdi hi6Lr
cliOn th6
tirc thoi o hai dALr
doan mach. C6rtg
suit ti€tr
thu
di6n
cfra rlach
dign niy
lA:
/'
A. 10
\5
w
B.
l2,s
.6
w
c.
25
^,6
w
D. 37,5\6

W
Ciu 14: Ngu'o'i ta dirng
nrdy bi6n
6p tlng
th6
tru6c
khi
trtrl,pp
tAi cli€n narrg
c'li xa l.i
d6:
A. GiAn hao
phi diQn
rrang
do
t6a
nhiQt
trdn
dLrd'ng
dAy tii
c1i0n.
B. Tang
cudng d6 dong
diQn
hi6Lr
durrg
cAn truyAn
di
xa'
C. Tang cdng su6t

di6n
cAn
truydn
tii di
xa.
D. Tang
116
s5
cdng strit
cira
dorrg
di€n.
Ciu
15: T'i6ng 6l ngoAi
ph6,c6
rnirc
cudttg
d6 Arn
lA
cudng
dd fun
chr-rArr bing
l0-r2
W/rn2.
A. u54
-
5cos(40 nt)-
it
/4)
(rnm)

C.
tlla:0
80 clfl.
Tinh cLldng
do Anr
cLra ti6ng 6rr
ngoii phO, U;6t
B.
u11:2,5cos(40
lrt-
lr /4)
(ntttt)
I). rrnl:5cos(40
nr-r3
z/4)
(mn)
A. 10
6
Wim2
Cf,u 16:
Chon c6u sai:
B.
1o
e
W/rlr
C. l0
3
W/m2
I). 10
a

W/m2
A.
Quang
ph6 clo b6ng
cldn
di6n
c6
dAy
t6c n6ng
s6ng
li
qLrarrg
ph6
vach
phht
x4.
B.
euang
plO
tien
tuc kh6ng
phLr thu6c
v2Lo
bAn
chAt
cia vdt
phAt
s6ng
nriL chi
pliLr

thu6c vio
nhi6t
dQ cira
n6.
C. M6i
ngLry6p tO 56a
hoc
khi
bi kfch
thich,
phdt
ra c5c b[r'c xa
c6
br-L5c
s6ng
x6c clinh
vd cho rn6t
qLrang
ph6 vach
ph6t xa ri6ng
ddc trutrg
cho
nglr)/erl
tO
ey.
D.
Quang
ph6
vacl-r
hdp

thLr
cira
rnSi
nguyOn
t5
co tinh chAt
dic trtltrg
cho rl6i rrgiryAn
t6 d6.
Ciu
17: Chi6Lr
m6t
chr}nr
6nh s6ng
don
sic
c6 bLL6c
s6rrg 2
=0,45l,tnr
vAo cat6t
cira rn6t t6 bdo
quang
di6n
c6gi6.i
hariquangdiQn
2o
=
A,66l.nn.'Choh:6,625.10-3aJs,c:3.108r.tt/s,e:
l,6.10rec.D6
l6ncirahi6Lr

cli6n
th6 h5m
t16
ddng
quang di6n
tri6t
ti6u
lioin
todn
ld:
A. 1,756
V
B.
0,878
V
c. 1
,3
I
7
V
D.
0,439 V
CAu.18:
Hai
rrgu6l
ph6t song
k6t
hop
S1,
51tr6n

n-r5t nu'oc.lh1t.tu haidro
d6ng
cli.6Lr
hda
cirng plirLong, cirng
tAn
s6 f
=
20H;,.i,,'rg bien
dq a,:2,5
nnr
vi
cirng
pha
ban
ciALr
bang 0.
X^eni rirtg
birln
dQ s6lg
kh6ng
tlray,d6i
tr.ongqLr6
trinh
trr,ry€1
sorig-
Bi6t
van_t6c^trLry6n
song
tr6n

nrdt
nrroc v:32
cm/s.
PhiLong
trinli
s6ng
t6ng hqp
tqi
di6rn M tr6p rnat nr-r6c
(l\4
c6ch
51,
52
nhting
khohng
tLtong
ilng cl1
:4,2
crrt,
dr
-
9
cnr)
gay
ra b6i
hai
,.tg.'6" S1, 52 lir:
Cftu
19:
'h'ong

thi nghi6rr
Y-6rrg r,6
giao
thoa
6nh s6ng:
zt
-
I
tltl, D:2
rn, hai lihe S1,S2 drto-c chi6Lr
bnng
clrirnr 6nh
sang
tringi6 bLr6c
s6ng
ndnr
tlorrg
lilioAng
tir 0,3811n
cl€n 0,76
pL rrr. H6i
nh[ing
br,Loc s6rrg
nd.o
clLroi
dAy co
vAn
sdr-rg
nant triing
nhau

6' cli6rn
A
trdn
mdtr
qttair sAt
giao
tlroa cdch v6tt s6ng trr-rng tittt mdt
l<hoing
x: 3 r'nrr.r.
4. 0,425
p m vd
0,625
lt
rn
C.0,45
p
ni vir
0,65
trtnt
A. lr
>
12.
C. Is = 12.
CAu 20:
MQt
nrach
dao ddng
96rl
cLr6n
tliuAn cAm L:50

pH
vitLr di6n
C: 1.5 nF.
IJi6u cli6n th6 cu'c
dai tr.6n
ty di€rr
Uo:
I
,2Y.Xtrc
ainn
gia
tri tfi'c
thdi
cira cudng
dQ
clong
c1i6rr tai
thd'i di6rn
gi6
tri tilc
thoi
cira hi6r-r di€n
th6 tr6n tLr di0n bing
hi6u
di0n
thO hi6Lr clLrng
cita n6.
A. 14,7 IIA
Il.
20,8 mA

C'
29,4 nA
Cf,u 21: Chgn
cAu sai ve song
cl0n
tLr':
A. S6ng
cli6n
tLl truy6n
trong
chAn l<h6ng
vd tlotrg
rroi
nrdi
trudng vAt chAt.
B. S6ng di6rr tir c6 tnang
n[ng
lLto-ttg.
C. S6ng dien
tii
tudn
theo
c6c
dinh
luit: lrLryAn
thing,
phAn xa, khftc xa,
giao thoa,
nhi6Lr xa.
D. Ei6n tru'bng E

vA tir
tludng
g
Uien
thi6n tr-rAn
hodn vd
lr.r6n
vu6irg
pha
vdi
nhau.
Ciu22: MQt mach
clao
d6ng
I-C ly
tLr'6ng
c6 tAn
s6
dao
cl6ng ri6ng f0:90 MIIz.
M4clr
ndy n6i
voi
InQt ang
ten d6 thr-r s6ng diQn
tiL. GiA
sil
hai s6ng
c1i6n til
c6 cilng

ndttg lLto-ttg ttlturrg
c6 c6c
tAn s6 tttortg
frng f,
:
92
MI:z,f2:95 ]r4llz
tluydn
v.io
ang
ten.
Goi bi6n
c16
clao c16ng
cira rnach fi'ng v6i
hai
tAn s6 nAy
ld I1, 12.
Ci6
tli
cira
11
hay 12
s0
ldn hon
gi6
tri
cdn
lai?
B. Ir

<
Iz.
D. C6
thil xiy ra cA ba
phLLong 6n A, B, C tiry
thu6c
vio
pha
ban
dAu cita song
trLrydn
c15n.
CAu 23: M6t ddng co
di€n
ti€Lr
thLr nr6t
c6ng suAt
P:300
W. Ddng
cli0n chay
qtra d6ng
co c6
gid
tri
cuc dai I0
7f
:4
A vA cliAnr
pha
a

so v5i
hi6Lr
cli€n
thd
o'hai dALr
d6ng co. Tinh
hi6u di6n th6
cLrc dai Uo
giti'a
hai clALr dOng
ita.
J
co.
A.75 V
I].300
V
c.22Av
D. 150
v
Ciu
24: D6ng nang
cira mQt
vAt
clao
cl6ng
di6Lr
hoa biOn
tlri€n tLrAn hodn
v6'i tAn s6
f

:5H2.
Chu l<i dao d6ng
cira vAt ld:
A.
0,2
s
B. 0,3
s
c.0,1s
I). 0,4
s
Citr
25:
Mdt
cop
lic
ld xo
c6 hC
s6
din
h6i
l<: 60
N/rn
treo thlng dilng
vio nr6t
gifi
c.6
dinh. O vi
tri
cAn bang

lo xo bi
gi6l
5 cn. Cor.r
lic
dao
d6ng
didu
hda v6i
bi6n
dd A
:
3
cn-r.
'fai
vi tri
cao nlrAt
cira vAt
ndrtg, ld xo tdc
dung vdo
gi6
do'nrQt
l\rc c6
d6 16n
lA:
A. 1,8 N
B.ON
C.3N
D. I,2
N
,tT

Ciu
26: M6t con lic
ld xo
clao
ddng
diALr
hda
vditAn
s6
go.
0l:
5n rad/s vir
pha
ban
dAu tp
=
-;
rad.
Hoi
sau
pror
thoi
gial
ngin
nhat nio
clLi6i
day
(tinh
tiL l<lii
con lic bit

dALr clao d6ng)
d6ng
rrlng dao d6ng bang
tlrd
rrang
dao d6rrg.
c.
l,
60
bing
chirng
thu'c
nghi6nl
qllarl
B.
0,5
1-t
nt vd 0,7 5
7t
nt
D.
0,58
tr;
m
vi\
0,72
pn
B. Hien tuong
qr-rang
dAn

D, I(hirc x3 6nh s6ng
L
D s
60
tlorrg khirrg
clinh 6rrh sArrg
co tirrlr chAt
l).
10,4
nrA
A.7 s
B.
14,
60
60
Ch,u
27: HiQn tLro. ng nio
sau
dAy
ld
s6ng:
A. Hi€n tuo-ng
quang
diQn
C. Giao thoa 6nh sdng
Ciu
28: Pha ban dAu
cira
clao
c16ng

didtr
hoa:
A. Chi
phr.r
tlir-rQc vdo
su
kich
thich
clao
cl6ng: toa
d6, vAn
tdc
ban
dALr.
B. Chi
phu
thu6c vdo
g6c thoi
gian
t:
0.
C.
Chi
pliu
thudc vdo
trttc
toa
ilQ
Ox
vi

chidu cluo'ng
cita n6'
D, Phu tliudc vdo
trurc toa
d6,
96c
tho'i
gian
vA sir kich
thich
dao
d6ng.
C6u 29: Trong thi nghiem
Y-Ang
vd
giao thoa
6nli s6ng:
a:
1,5
tttt't't, D =
2 rl.
Vi trivAn toi thfl'ba
kA
ti| r'ln
s6rrg
trr.rng
tAm
cicir
yAn'sdng
trLr"ng

tAm
rndt
l<hoAng
r^:2
n.tnr.
BrLoc
song
cita cltr-rrr
anh saltg clort
sic chi6tr
A. 0,45
1r
nr W.0,54
pt
rn
C.0,6
1t
r"n f).
0,65
7z
rrr
CAu
30: Trong
thi nghi6nr Y-Ang v6
giao
thoa
6nh
s6ng,
hai
l<lie S1,52 cluoc chi6Lr

bing chirnr
birc
xa c6
bu6c
s6ng l'
Lr(4=0,63pm).
Bi6t
rrng
vAn t6i
thfi'3 I(e til'vAn
sdrrg truirg tArn cua
bu6c song 2,
trirng
v6i
vArr
t6i
thfi'4
k€ tiL vAn
sAng trung
tdnr cila bu'6'c
song
.Lr.
BLLdc
song
) ,
cira chilir
bilc
xa lA:
A.
0,45

1t
t'n 13. 0,48
;z
m C. 0,5
1 yt rn
l). 0,54
7r
rn
D.
Dao dong t6t clAn
Cfiu
31: I(hi
bo
qua
rnoi lrrc c6n vd lLlc ma
sft, clao clQng
cna
con lic ld
xo li:
A. Dao
d6ng
dLry
tri B. Dao clong cu'6ng
biLc
C. Dao c16ng tir do
C6u 32:
Chon
cAu sai:
Anh
sdng

don s[c lA:
A. Anh
s6ng kh6ng bi t6n sirc nrA chi bi l€cli khi
di
qrra lang liinh
Il.
Anh sdng
c6 budc s6ng x6c dinh
C. Anh s6ng c6 tAn s6 xfc clinh
Il. Anh sdng
bi l6ch vzi cl6i rliiu khi
cli
qua
lirng lifnh
Cf,u
33: MOt
soi dAy
rrAnh dirn h6i AB ddi
2,5 ir
clLroc
cing theo
phrLong
r'lgang, trong
c16 dALr B cd dinh, dAu
A dLloc rLrng nhd'
mot clr-rng
cu
d0
tao song diLng tr6n dAy. TAn s6 nrrrg f c6 th6 thay rloi dLroc
gid

tri trong
kho.lng tir'93 I'lz
d6n 100 Hz. Ilidt
t6c tlo truydn
s6ng
lr'€n cliy v: 24 nls.lloi tAn
rO tpnai nhAn
gid
tri
ndo
.;
dLrtii driy de trirr
di1' c6
s6ng
diLrrg:
.d. 98 Hz l|.95 Hz C. 1001-lz l). 94 Hz.
Cf,u 34: Tlong
cluang pho vach
c*a ngLry€n
tir
hiclr6,
vacl-r
ilng vo'i
sLl
chLry6n cira 6lectron
til
qLry
dao
M v€
qu!

dao K li: ll
=
S, 1026/sru
,
v+ch
rl ng
vd'i
bLro'c
srlng
clAi nlrdt tlong
cldy Ban-rre
ld,
2,
=
0,65661tut
. BLr'6c
s6ng ddi nlrdt
cira d$y Lai-rnan lA:
A.
0,0608 prir 8.0,11tr6
$nr
C.
0.1 824
prtr
D.0,24321,tttt
Cf,tr
35: Dat
vAo hai diu rn6t
thi6t bi
cii€n hi6u di0n th6 u:220cos(l00nt-r

xl6)
(V)
tlri co
clong di6n
i:
2sin(100nt
+
nl3)
(A)
chay
qLra thi6t bi. G;6
tri cira c6rrg suit ti6Lr
tlru
cfra
macli:
A.220
W.
c.440
W.
B. 1r0
w.
D. Chua dfi th6ng tin
dd tinh.
Cf,u 36:
Con lic don c6 chidu ddi l:20
cnr. Taithd"i di6m t:0 con
lic du'o-c trLrydn vAn toc
14 crn/s til vi
trf
cAn

bing theo chiCLr
clr-Long cira truc
toa d6.
L.4y g
-
9,8 n/sz. PhLrong trinli clao
d6ng cLia con lac lA:
A. 20sin(7t
+
nl2)
(cn).
B. 20sin(?t
-
n/2i
{cnr).
C"
2.sin(7t)
(cm).
Cf,u 37: Bi6u
thflc trio dudi clAy
khdng
dirng d6i v6.i hi6n tuo-ng
quang
cli6n:
I
-
Itc ltc
l]. lif- A+:/rir,o,,,,,
C.
::+eU,,

2
""'"'
I )o
D.
2sin(7t
+
n/2)
(cnr).
D.
E=!!*\,,,,]
) )o 2
urti\
A.hf:eU5-A
Cffu
38: Rdto cira
nr6y
ph6t difn xoay
chidLr m6t
pha li phin
cim c6 4 cdp cuc quay
v6i vdn t6c
g6c
id
bao
nhi6u
{tinh
theo dsn
vi
radls) d€
tAn sd

cira ddng diOn
tao ra
b6'i nrdy
phdt
ld 50 IIz?
A. 12,5 B. 7s0
c.7B,s
D.
200
Ciu 39: Chon c6u
sai: Trorrg
slr lan
tluy€n
cira
s6ng:
A. Nhfrrrg di6m crich uhau nr6t s,3
rigLry6n
lin
uira bii6c s6ng thi lLr6rr dao cl6ng
ngLro-c
pha
nhau.
B. Tin s6
s6ng kh6ng rhay d6i
khi tlLrydn
tu m6itrrrdng rtdy
sang
nr6i tLLLd'ng
hhAc.
C.

Tdc d6 truy€n
s6ng ld tdc d0
tri.rydrr
pha dao cl6ng.
D.
NhLlng di€m niur
t16n
cirng nrQt
phLtorrg trLrydn s6ng
vd c6ch nltau rrr6t
sO ngLry6n lAn
bLroc s6ng lu6n
dao d6ng cirng pha
v6'i uhau.
Ciu 40:
Cho mach di6rr
xoay
chidLr
g6m
rrdt
cudn dAy co
dd trr cAr-n L vd
di€n tr6 R mic nOi
tiep
v6i rr6t tLr
di6n
C. Ddt vdo
hai
dAu
mach

di6n
rrrQt
lii6u
di6n
th6 u:
100J2.ort0Qzt
(V).
l(hi d6,
hi6u cli6n
tli6 hi6Lr
dung c1o duo'c trOn hai
ddLr
tLr di6n c6
giri tri
gAp
1,2 lAn
hi€u
di0n th6 tr6n liai dALr cuQn d6y. Neu
nOi tit
hai dALr
''
.
''
;
tu
di6n
thi thAy cudng
dQ ddng
di€n
trong

m4ch
c6
gi6
tri hi6u
dgrrg khdng thay ddi vd blng
0,5
(A).
IJoi
cArl
khdng 21, cta
cu6n dAy nhAn
gi6
tri nAo
dLr'6i
dAy:
.4.80 f)
B. 120
f)
c.
160 f)
D. r80
Q
[{. Pr{Ar{
TU cI]oN.
Thi sinh
clti
eTtro'c
chorl
I:irn nl0t
trong 2

phAn
satl:
A)
PI{AN
CO
frAN
(10
cau,
tri'ciu "{1
dan
cSu
50)"
PbQqe} ba!!
ho:ic l'hin
n4nq
cao.
CAu 41:
Dao dQng
duy
tri
ld dao
c16ng:
A. du'o'c
cirng cAp
th€m
ndrrg
ltLong
vtii
c6ng su6t
kh6ng

clOi theo
thdi
gian.
B. c6
tAn
sO
Uing
tAn si5
crha
ngoai
lLrc t6c dqng
1€n
vdt
dao
d6ng'
C. c6 bi6n
d6
giArn
dAn theo
thdi
gian.
f).
cJir.o c
bir
lai
phAn
nang
luong
hao
phirnd

hh6ng
lAnr
lhay
cl6i chLr dao
d6ng
cira hQ.
Ch642:M6tvAtdaodQngdi6uhdaruantheoqLrylLrit:
x:6cos(2,t-+)(crn).'l-ai
thoi tliirlt1
vAtcolicl6
6
I
xr
:3
crn vd
vAn tdc
du.ong
thi
6
thoi
cliem
l
s ti6p
theo
vat o
li c16:
J
A.
-3
crn

B.
3 cm
C. -
6 cnr
f). 0
crr
Cf,u
43: IliSn
thi6n
vAn
t6c cira
m6t vAt
dao dQng
di0Lr
hod
sdrn
hay rlE
pha bao
rrhi0u so v6i
biOn
thi6n li d6
dao d6rrg?
A.
T16
pl'ranl2
B.
fr6
phanl4.
C. S6n
phanl2.

D. Sonr
phanl4
Ciu
44:
MQt
con
lic
do1
g6n-r rr6t
qLra cALr
c6
kli6i
luo.
ng nr
:
0,2 l<g treo
vio
dALr
Ilot soi
diy kh6ng
giarr,
f.froi
f ua.ng f.|o',g
dling
ii6 .?
.l,ie
,icli'i
1:
0,5
rl. Con

lirc
dao ct6ng cli6Lr
hda
quanh vi 1r"i
cArr birrg
cira n6.
LAl'
g:
l0rn/s2.
XAc dinh
cl6 lon
cira
luc
h6iphuc
lihi v0t
di
qLra
vitricri
liclO
s:3ctn:
A. 0,12 N
B.
2,12
N
c. 2 N
D' 2,06 N
Cjiu
45: M6t m6y
biiln
6p

c6
cAc
cuQn
dAy
ro
"Ap,
thil
cAp
cieLr lli tLrdng
vdi s6
vong
dAy ttLorrg
[lng
N,, Nz
\T
(l\:
l0). Mdy
bi6n
6p
c6 hi6Lr
s,r5t
H
:95
o/o,
cudng
d6 hi6Lr dung
cira ddng
cli6n
xoay
chi6u

ch4y o
cLtorr
.N,
tnir
c6p 12- 1,9
(n),
Biet
h0 s6
c6ng
suat
ci,"
rlach
so
cAp vd
thil cAp dCLr
bing
l.
Cudrrg
d6 hi6Lr
dLrng cira
ddng di6n
xoay chi€u
chay o
cuOn
so
cdp
ld:
A.
0,20 A
ll. 0.18

A
c.
0.19 A
D,20A
Cjiu
46: Chi,lu
mdt
chim
6nh
sirrg
tinr
vi\o
nr6r tirn
gd
son
nriu cl6, ta
thAy tdn
96
c6
nrAu:
A. D6
R. Xanh
C. Den
D.
Tinr
Cfiu
47: Chi6u
nr6t
chirrr
6nh

s6ng
rlorr
sac
c6 bLL6c
s6ng )"=0,65ptnt
vd
c6ng
strAt
P: 12,5
W
vdo
cat6t
cira
rr6t
tti
udo
quang
c1i6n
(Z .lo)
Bi6t
ring
cir' 1000
plr6t6n
d4p
vdo
cat6t thi
c6
1 dlectron
bat
ra. cho

h
:
6,625.10-3aJs,c:3.108ni/s,e:
l,6.l0reC.Cudngd6ddngquangdiQrrbaohdalA:
A.
13,082
rnA
8.3,27i
mA
C' 9,812
mA
D'
6,541
rrA
CAu
48: Chi6Lr
m6t
chirlr
inh
s6lg
clorr
sic
bu'6c
s6ng
21
tiL rru6c
co chi5t
su6t
Irl vAo
thiry

tinh co
chitit sLrAt
12. Bg6c
s6ng
2
2
cita
cliitrn
6nh
sing
don
sic
triy
truydn
trong thiry titrh
li:
A.
1,
=\4
11,
t1^
l|. )',
=
-L.1,
11t
c. 7,
=e!-).s",
I'12
-
11l

l).
1.,
=
(
"t
).4
l'l)
*
1'll
Ciu
49:
Cho
rnach
cliel
xoay
clri€u
96nr
ba
phin
tir
L,
R,
C
mic nOitiCp
theo thil
tLl
cl6. CLrQn
day lli
tLL6ng
c6

0.2
l0-r I
.
do tu
cim l-:
u'u
H. C:
'"
F.
Ngr-r6n
di€n
xoay
chiOu dat
vio hai
clAu mach
clign
c6
hi€u
ciiOn thO hi6ir
tr
8lr
1
dung kh6ng
aOiva tAn
sti
f
:501'lz.
Bi€t
ur-n
l6ch

pha
1
so v6i
LrB6. Hdi
R nh4n
giir tri
ndo
dLr'6iddy:
'1
A.40fl
"
l]. 30
(-)
C. lOO
l). 20 f)
CAu
50: C6
tne tao ra
tir
tlllong
qtray
bing
dong
di6n
xoay
chi0r-1 nrQt
pha
[h6ng?
A.C6tne,bingc6chchobaddngm6tphaviobacu6ndAydatlechnhart
120otlongstato.

B. C6
th6,
bing
c6ch
n6i hai
cu6n
dny
dflt
l€ch
nhau
180o trong
stato, vio
mang
cli6n
rnQt
pha,
(mOt
cr-rOn
nOi tru'"
tiOp, mQt cu6n
n6i
qtta
nl6t
tLr
di6n).
C. Iih6ng
th6.
D. C6
tne, bing
cAch

n6i
lrai
cr.rgl
dAy
dlrt
l6ch
nhaLr
90o trong stato,
vio
nrang
clien
nrot
pha.
(nr6t
cLi6rr
nrli
trgc ti6p,
m6t cuOn
n'ii
qtta nr6t
tu
cli€n).
B)
PI1A|,{
NANG CAO
(n0
c6u,
ttir c6u 51 dOn
ciu 60).
CAu

5l: Mdt rdng
r"oc c6 bdn
kinh l0crr, c6 n6men
qLrdn tinh
aOi vo; tlLrc lA I:10-21<gnr2.
Ban
clAu rdng
roc
clang
dilng ydn,
tdc
dung vdo
rdng loc ni6t luc hh6ng
d6i
It:2
N ti6p tuy6n v6i
vdnh ngoAi cita
tro.
Sau
hhi
rdug
roc chiu t6c dLrng lLlc
alr-ro-c 3s
thi vArr tdc
goc
cira n6
ld:
.A. 40rad/s.
Il. 60rad/s.
C. 30rad/s.

D. 20rad/s
Cfiu
52: M6t vat
dao d6ng
dgc
theo ni6t
phuorg
theo
qLry ludt: x: 1
+
6sin2(2Ot+
L)
(crrr). Bien
dtl
vA
tAn
n"
+
sd
g6c
dao d6ng
cira
v4t ld:
A.
A
:
3
crr, o)
:20
radls

C. A
:
6 cm, cD
:20
radls
Cliu 53:
M6t con ldc
ld xo
dao clong
c1i0Lr hda
theo
qLry lLr6t:
x:4 cosl aI
t
L)
(crl).
SaLr
thdi
giarr
t
-
5,25'1-
6
('l'ld
chLr l<idao dQng) tinh
til
khivAt bit
dALr
clao c16ng,
v{t di ci"ro-c

qudng dLrdng
ld:
C. 85,5
crr
D. 82 cnr
B. A
:3
cr.r.r, co
:
40 rad/s
D.
A
:4
cnr.
crl
-
40 rad/s
C,20 J.
c lL=q
D.
lL:q
wi 9w9
4.42n crn
B. 84
crr
Cf,u
54:
Chi5Lr
lin hLo-t
hai chirnr

biLc
xa
c6
bLr'6c
song
)1, )-,
(4
<
1r) vdo
qtrA
cAu c6
lAp trLrng hda r,'6
rli6n thi n6 c6 di61 th6 cu'c
dai tLrong
irng
V1, Vz.
Chi6u
d6ng
thoi
hai
chunr bfrc
xa ti€n vdo
qr-rA cALr nAy thi
-l
di0n thd crLc dai cfra 116
li:
A.V:V,
r-Vr
I].V:Vr
C.V:Vr

-Vz
D.V:\'2
CAu 55:
N€u
tdng
monren
lu'c tAc
clung
l6n
vAt ddi voi
nr6t lruc
qLtay
c6 dinh
co
gi6 tri dLlong hh6ng ctOi ttri
A. v6t ludn
qr,ray rtlrault clin
c10u.
B.
momen d$ng
luo-ng
cfra vit
bio
todn.
C.
gia
t6c
g6c
cira v+t
kh6ng

d6i.
D.
gia
tdc toin
pliin cira cli6nr
bdt
kj' tr€n
v.1t khdng
c16i.
Cflu
56:
Hai dia
trdn c6 lt.rornen
qr-ldn
tinh
11, 12
(11
:21)
clang
qtray
ctdng
trtrc,
cirrrg chidtr voi t6c c16
goc
tr-ro'ng flrrg
cD,,0)r
(c,r,
:
*).
Ma

sit
6 trirc
quay rrli6
kh6ng d6ng ki5. SaLr c16
clro hai dTa dinlr vdo nhau.'ly
'
2'
sO ctgng
ndng
cira h€
liai dia sau
lihi
dinh
vA trrr6c
khi dfnti li:
B.
]L:1
wle
Ciu 57: N46t 6tO cl.ruy6n
d6ng
lai
gAn rndt ngud'ic6nh
sdt
giao th6ng.dirng b€n
dLrd'ng voi
t6c d0 vs: l5 m/s.
Khi 6t6
chuydn ddng nguri'i
lei 6td
b6p

coi
ph6t ra rrdt
s6ng Anr c6 tAn
s6 l': 1000
Hz.LAry t6c d0
Atr trong
kh6ng khi
v: i30
m/s. TArr
sd
drn nrd
Irgrrd"i
cinh s6t
nghe duo-c lir:
A.955 Hz,
B. l04B
l-lz
C. 900 Hz
D. 1000 Hz
w"2
A.
',
\Vr
9
A. 400 J
I]. 800 J,
Ciu 58: M6t m6nren lLrc
c6
d6 l6'n
4

N.nr
t6c dr,rng
vAo
rn6t b6nh xe c6
Indrletr
qtrdn tinh d6i vd'i trtrc
bAIrh xe
Ii 2 kgm2. N6Lr b6nh
xe
quay nhanh
dAn
dAu
tir trang
thdi
nghi thi d6ng nhng
cira b6rrh xe o'thd'i
di6rl
t:
10
s
t;.
D. 1600
J.
Cf,u 59: Doan
pipch
di61
xoay
chidu
MN
gonr

hai
clien tro
vd hai tu di6n mic ndi
ti6p theo thfl tLl Rl, C1,
R2,
C:. Di6n P
nim
tr6n
rr4ch
dign,
ninr
giLla tp
C1 vh cli€n
tr6 R2.
Hoi
cdc
gia
tri
R1, I{2, Cr, Cu
phAi
th6a
mdn
di6u ki6n nio dLr6iday
dO I<hi
c6 ddng
di6n
xoay
chiAu trottg mach thi
uvlp c16ng pha v6i Ltpx.
:

R, C,
R,
C.
"
C,
Rr C,+C.
A.
,- ,
8,
r-
:
C.
",
.
-'I
D.
-
=
R, C,
R,
ct
R, Cr+C,
R, C,
CAu 60: Ph6t bi6u
ndo sau'Oay
ta
dirng
vd chuy5n
d6ng
quay

cira vAt rin
quartlt
Ir6t
truc cd
A;nh?
A. VAt
.i'.,
q,ray
nhanh
dAn
dALr v6'i
gia t6c
g6c l<h6ng dOi thi tn6rrett d6ng
ltLo'rrg
dLLo-c bio todrr.
B.
N46nren
dQng lrLo. ng
cfra
vAt
tang
hai IAn
thi t16ng rrang cira vqrt
ciing tang
hai
Iin.
C.
I(hitdc
clQ
g6c

cLha vqt
tang
2
lin
thi d6ng nang
quay
cita
v4t
tang
4 IAn.
D.
Khi
rndrnen
d,3ng
lLro-rrg
cira
vAt
tang
bao nhiEu
lAn
thi
tndtrett
qu.ln titrh
clra no ciirtg tartg bay Irhie Lr larr.
, .{,
^,
:
-,-
.
-: HFT

Kltoi
Cittrl'1tt
L1|- DHKHTN -
DIIQG HA Arci
ilsr HQc
QUGC
GEA
F{A
NQI
,
T'RTIO}.IG
PE{ I{}{CA
E{OC T'EIi-THTEN
.
'
g(hdii
T'EIPT
Chu3'6re
VAt
X,i
DE
T'5{{
TE{Ll'F}+nFqA
s,AN
S
-
IVAF*{
2CIlCI.
i\40N:

VAt !),
Thdi
gtan ldm hdi:
9C
Plut;
(50
cdu
tdc nghi(mi
Y6t
mdi
cfrw sau,
amfa/cla!
lcdy
tiwe
rcaQt
(01) phworcg
dm trd ldi
legp
$
n{eftt.
[. FE{AN
CEIUNG
CHO TAT CA
grui
SnNru
(40
c6u,
t&
cdu
X. diim

c6u
40).
Cffu
1: M4ch
chqn
s6ng
cira m6y thu
thanh
giim mQt
cu6n
ddy
c6
y:
710-7ln)
H
vd rnQt
tp
di6n
c6
di€n
dung
thay
d6i
duqc.
Khi 6y C:
(10-3rT)
pF,
thi
m6y
thu dugc

s6ng
diQn
tir nAo
ducri
dAy?
A.
l.
=
60rn.
"
B.
f
:5.108H2.
C.
l.
=
6m.
D" f
:
5.10eH2.
CSu
2: HiQn
tuqng
tan sic
6nh sdng chimg
t6
a. Xfti
"O
,*
s-ring thich hqp rqivio

"iAt
trong
su6t
kh6ng
mdu
thi
ctrAt eO
bi nhuOm
mdu'
il. bhtd;;rtt"
iOi"rraii-ne
ruat
c6
sittttiJang
aAn mi
bu6c s6ng
6nh
s6ng
tang
dAn.
C. Tan
sO
rintr
s6ng thay
d$i
khi
di
tu chdn
khdng
vdo rn$t

m6i
trudng
trong
sudt'
D. Chi6t
suat
clia
*Ot
"ftAt
trong su$t
c6
gtittrf
khdc
nhau
ddi
v6i nhtiig
6nh
s6ng
c6
bu6c s6ng
khdc
nhau.
Cffar
3: Khi
mQt
s6ng
diQn tir truyAn
tir ch6n
khdng
vdLo rn6t

mdi
trucrng c6
vAn
t6c
truy$1
s6ng
bing
4i5
Cffu
4:
Nhtlg
diAu nAo sau
dAy ching
cho
cA
tia
hdng
ngo4i
lan
tia tu ngo4i
?
^
^)'
A.
Ueu ra
c6c s6ng
diQi'r tri, c6
th6
duqc
phdt ra

ffu
c6c vat bi
ddt n6ng
s6ng.
E.
Lem den
phim
6nh
vd
gdy
pbbt
quang'
C. T6c
dpng
nhiQt manh
r1d
g0y
phAt
quang.
S, C6
khi n6ng ion
h6a tdt ch6t
khi.
C6u
S: Mot 6m
thoa s6
tin sd 44AHz$h#
6in
1a),
d[t s6t

miQng
li1ot
binh
irli
dpng
nu6c
e6
mfc
ni-r,1c
-;Acnmi4ns
binh
stg cho"
am ahtiiraph6i
iatu
migng
binh
td-tonhfrt.
Ftdj
"tltl?t:nu*"nT.+:tmOt
eOt
nuoc
c6 chiAu
cao tOi
tirieu bing
bao
nhi€u
t,tri
6m
thanh
tr6 nOn

nhd nhAi?
Ven
tdc
truy€n
Am
trong
khdng
vdn
tdc. u4
t*g
trong chdn
khOng
thi
A.
tan s6 s6ng
khOng d6i.
C.
bu6c
s6ng
tdng
l6n 514 lAn,
E.
tAn s6
s6ng
ting
l6n 5l4ldn.
D. bu6c
s6ng
khdng
ddi.

C. 17,85
am.
khi bing
330m/s.
A.37,5
cm.
W.27,5
cm.
C6u
6: Trong mQt
thf nghiQm
ph6n img
h4t
nh6n,
dd c6 mQt
ndng
D"
18,75
cm
lugng
tuoarg
ducrng
mQt
khdi
luo.lg
l0-rrhg
toa ra.
lJ6ng lugng
d6 bairg
a.

+,s
.
t
o5 l.
E" 9,0.
1
0-6 .T.
c.
3
,0.
1 0-3
J.
Cdu
7: Hinh b0n
cho bi6t sU
phu
thuqc
vdo
thd'i
gian
cta s6
het
Nt do mQt
ngudn
ph6ng xa
ph6t i'a
trong
dorl
vi thoi
gian. M6i li€n hQ

gifia
it{1 vA
t ld
.4" N,:
2g*zot
B.
N,:'2g"-o'tls1
c. Nt:3e-o'o5t
D.
Nt:
1000e*o'05'
C6te
E: Tim
ph6t
bi,5u sai
khi n6i
od dao
riQng
tat
dAn.
A.
Bi6n d$ dao dQng
gi6m dAn.
B" TAn sO dao
dOerg cing
ldn
thi
sp:
tat
ddn

cAng chQm'
C. I-1rc c6n
vd
ma
sdt
cdng
i6n
thi su
t6t
dAn
cdng rr-hanh.
.
D. i{5.ng
luong dao
ilOng
gi6rn d6n.
,i,A
(L.au
9: Uno Cac
nguol1 Sang
gOln
| . I
i . d6y
toc v6nfiairr ldpg
sdlg
n6rn
troiig
b6ng
tl-ifiy
'Li;;h

eid i"-f,t
khi\ei
g iihi c10n
ay: suht
rAtt
tuAp,
Z.'goi nayt:
iNa)
vci up
iuit
#i
tnap
1
,h41 s6ng
ti ong
6ng
ph6ng cti6n.
3. ddn ho-i
tirgy ngh,n co
6p
su5.t
vAi
atnrOl-pire
(ddn
cao 6p) clung
lini
rldn
rluong.
'ir'ratil:-
ili

-
ll:l
ri'*'l!rr
1r"l'L
-
",-
_=;.
tvBa se tffit 354
D.9,0.i0sJ.
Nirfiig
ngu6n
s6ng
ndo
ciro
quang
pird
vacli?
l\. ua I
va J.
B" ChZ
vi
3.
mric
,J6
phirt
ia
bilc x4
mAu
do.
A"L-+K.

E.N-+K.
cau
n0:
Tim
y
dring.
su c$ng
hu&ng
trong irach
di€n
R.,
tr-,
c
kh6ng
phan
n-h6.nh
A;
xay
ra
ctrri
kiri.cuQn
diy khdng
c5 di6n
tro thu6n.
B" xay
ra
o
tin sd
,uo cho dur:g
k16'g

cua
iu di0n
bd'g
i6ng
tro'cua
cuQn
dAy'
C'
xay
ra d
tin
sd sao
cho cAmkhd:rg
cua cu6n
d61'
bing
dung
kh6ng
cua
tu
di6n'
D. xAy
ra thi
hi€u
diQn
thti
gifta hai
dAu
cudri dAy
d6ng

pha
vci hi6u
diQn
thO tr€n
tu
diqn.
c6u x1:
Ndng
luoiig
lian
k€t
riong
c6
th6
dtrng
de
d6nh
gi6. muc
d0
b€n
virng
cira
c6ch4t
nh6n'
Dai
luqng
cl0
A.
giAm xu5ng
d6n

bang kh6ng
eOi
vOi
r*,irng
h4t
nhAn
n{ng
c6
tinh
ph6ng
xp'
P"
lj, fe
thr-ran
v'di
ty s6
ncrtron/prdtdn
trong
mdt
hat
nh.an'
C.ti
l9
nghfch
voi
t6ng
s5
notion
+
pr6t6n.trong

mQt
hat
nhal
,
n" cO
gialri
lon
'1'at
clio
nht'g
hqt
'hA'
ttito
o
gifa
Bang
tudn
hodn.
Cdu
12:
Tim
cdu trd
ldi
dung.Trong
m6y
ph6t dien
xoay
chieu
mot
pha thi

,4 PhAn
c6m
ld
phan
hinh
thenh
su6t
dipn
dQng
xoay
chi6u'
B.
PhAn
irng ld
pf,an itintt
thanh
su6t
dign-dQng
xoay
chi6u'
;:'C:t;6r
;d;"huraankhuyon
va hai
.itoi
qo?t dc
dua
dusc
higu
diQn
tho

ra
ngodi'
;:
;6
;ti*";5;;;s
quay crla
roto
chi
cAn
tdng
sd
cuQn
day
cira
phAn
ys
1c.l.'han
shto
ld dri'
,
C6u
n3:
Cho
mach
d;E
";d;;;ilrOr
o"v
thuAn'cim
c6
dQ ir;

cdm
Lmdc
noi
tiep
v6i
mOt
diQn
tro
thua'
R;;;il;;
r'r?'
aib;'tt6';*y
;hiil.
Cic
giatri hiQu
dulg
ctra
cuhng
dQ
ddng
diQn
trong
mach
ld
0'5A'
;;;ie;;;;
il6
;"
diQn
tro vd

cuQn
camiAn
luqt
ld
85V
vd
12sV.
X6c
dinh
die'tro'R
ctra
m4ch'
rri
"a.
r3iie"
""
n,tut
iang
rltd
xdcdirni
duqc
nhilng
v€u
t0 na9-3r1
{av;.
-
. i.
(1)
Dipn
rro

R
(2)
En
tu ca;
L
(3)
Hieu
diq'
th6
todn
mach
(4)
HC
s5
c6ng
suAt
cosq
(5) Tdng
tro
Z
(!).fira
ban
dAu
cua
hi6u
dien
th6
A.(6).
'ts.
(z),

(o).
c'
(3),
(6)'
D',(z)',
(3)', (s)'
CSu
n,4:
M6r
hieu
.Jien
th5
*o^y
"i,iAu
c6
gi|tii
liiqu
dpng240V
dugc
dit
vdo
hai
dAu
m4ch
diQn'
CAu
chi
;;;
"ariiAo
;* nguon

diqn
bi.dut
khi
Juong
aO
aone
ttieu
Opng
dat tri
t"-
1?t;
Hoi
n6u
thav
hiQu
dien
;h6;;;ral
61-e
iie,
j;
.J;';b;oi
"r'ie'
r
z"ov,
thi
cing
v6n
cAu
chi
dy

sc
bi
dwt
khi
dong
qua n6
dat
A. 12A.
w.24A.
c.
6Jt
A'
w"
nJt
A'
C6u
XS:
Chgn
nhAn
dinh
sai.
TAn
s0
cira
6m
quydt
dinh
den
d[c
tinir

ndo
sau
dAy
cua
Am?
-".;"
A*;A;.
-
-
B"DO
cao
cira
dm.
-
c. Nguong
nghe.
D.
cnong
dQ
am'
cffu
n6:
Bi6t
c6c
mtrc
n6ng
lu$-ng
c.,a
c6c
trang

th6i
dirng
-trong
nguy€n
ttr
hydro.c6
bi6u
thirc
8,,:1e.1"'1.
UU
chuy6n
*,iJ
ttr
**
N
-+ L cho
buc
x4
don
sic
miru
larn'
H6y
x6c
dinh
ki€u
chuyen
c.
cnl
/.

C.M-+L.
D. clti
1.
D"N+M.
Cdu
n7:
Trong
m6t
phAn
irng
nhi6t
hacli
ki6m
so6t
tiutvc
c6 dang
I
U
+
;
H
-+
7(]He;
+
X'
Hdy
xrlc
dinh
'dng
iuo,g

tda ra
sau
phan
fng.
LAy
van
t6c
6nh
s6ng
ld
c:
3.108
m/s,
khdi
lugng
nghi
cia
c6c
hat
nhdn
bing
m,;=
7,016005ui
lrlD:
2,014102t;I1tHe
=
4,0076A4u;mx:
1,008670u;
u:
1,66055'10-27

kg'
A.
0,597
MeV.
B"
5,gl
MeV'
C' 9'75
MeV'
D'
0'975
MeV'
CAu
nE:
CQng
huong
co
hoc
ld
hiQn
tu,gtlg
.4.
xiy
ra khi
dQ lqeh
pha
gifta
gia t6c
vd
li.

dQ
bdng
khdng'
B"
xay ra
khi
lgc
cuorg
bJc
luOn
cung
chidu
vdi
nOi
luc
cta hq'
C.
xay
r-a
lchi
chu
lci
cua
luc
cu6ng
buc
bing
chu
ki
dao

dQng
ri6ng
cira h0'
D" bi6n
dd
dao
d6ng
cudng
buc
tdng
"hffi?6;
;;0,
*a
i.l
"lt.
aalao
lsc
ludn
cung
chiAu
vdi
chuv6n
ddng
ciia
vAt
irong
sudt
qu5 trinh
dao
d6ng'

cffu
{9:
x.et
c6cbn"
,a
aicn
tir
cliir
yc,-l
pnat
ra
tir cac
}su6n
sau:
tri
chi6c
bdri
ld
dang.ld
quAn 6o
(1); tu
;"Ar;;
qra,,g
"+,
|i,)ti';,;;,;;d,;i
;r
(l)'
tn:
chidc
dian

thoai
di
dQ'g
(a). F{av
sip
xep
c6c
bric
;<a
ilr
iliec ti"61
tu: c.l
ta.t:
so
gia;ri
Ca;'.

ir"z,"u,',i,12
-
lE.:,,2,i,4.
c't',\.3,2'
D'4'2'1'3'
c,4u
20;: Ivioi
alo,1g
co
ciierr.
xoay
cii'€^ii
kbi

rnbc
vdc m?ng
rii6n
rcay
chi6u
tiri
sAn
ra
rn6t
c6irg
suAt
co licir
/,5
l{w.
Fii€ir
srrril.
";'i
;;1,
rri
ta
aa'h"
f
inh
cli6n
ndng ti€u
thr-r
cfia
d6ng
co'trong
1

gio'vd
gi5'
tri hiett
'[rattlt
216
-
llfi'ri0
liri
i']'i
dung
cta lri€u
diqn ihd
ur,i
gi$:a
hai
e16u
egi:g
co,
bi€t
dong
ciiOn
qua d6ng co co
giii
rri tridu
dung
li
zit
vd tr6
pha
n/5

sp v6'i
up1.
A.27 M\V; 270V.
B" 27
Mlt/; 188
V.
C6w
Ztr+
Khi xAy
ra dao
ddng
trong
mach dao
d6ng li
tuong
thi
A. diQn
truong trong
tu
di6n vd
tu truong.
trong
6ng
ddy
ddng bi6n.
.
B. ndng lugirg
diQn tii
trudng
bien ddi tuAn

hoan
vfi
tAn
s6
g6p
ddi
idn
s6 dao
dQng eria
rnpch.
C.
diQn tich trOn tp
diQn
bi6n thi6n
didu hoa vdi tAn
rO
gAp
d6i
tAn sd dao tidng cira mach.
S. cAm
rmg tu F trong
ldng
6ng
dey
d6i chiAu hai
lAn
trong m6i chu ki.
Chu 22: Cuong
dd
dong

chay qua
cuQn dAy
trong
mQt
mach dao dQng
li tucrng c6 bi6u
thuc
i-
5cos(2.tOt;
1ma).
Biet
dO tu c6m ctia cudn
dAy
ld L:2J01H, tim
gi6
tri cr;c d4i cria ndng luqng
di6n
truong
gifta
hai bAn tq
diQn.
A" r2,5.10-s J. B. 5.10-r0 J.
c" 12,5.10-1r
J. D.
25.10-rr
J.
A.5^i0-3
ht; 12.5.i0-5
J.
c" 0,5.i0-3

hT; i,25.Lg-s
J
C.33,75
MW
27AY. D"33,75 NfW; 234
V,
B"
Ir
:500nm;
?',2:656run.
B.
7,'
:500nm;
)"2:600nm.
B"
2,5.1.0-r
N; i2,5.
l0-5 .T
D"
5.i0-3
i!;
1,25.10
s
i.
Cdu
23: Trong
doqn
m4ch
xoay
chiAu

chi c6 cudn
dAy, thi:
A. ndng lugng tu trumrg
trong
cudn ddy bi6n
d6i
theo
quy
luAt
hdm sin ho{c hdm
cosin theo thdi
gian
v6'i chu
ky
eAp
ddi chu
kj,ctra
hiQu
diQn
th6.
E. higu dign th6 luOn
s6m
pha
hon
culng dQ ddng
m6t luong
n/2.
C. culng dQ ddng diQn
tr6
pha

so v6i hiQu diqn
thd mQt
g6c
A<p thoa mdn di6u kiQn 0
<
L<p
<n12.
B.
A,B,C
d6u
sai.
Cffu 24: Tine k6t ludn
sai. MQt con ldc dcrn c6 chiAu
ddi / dang
dao dQng di6u hda.
Khi
con
lic di
qua
r.i
tri cAn bing thi nguoi tA
gitr
cO einh
tran
Oiem ehinh
gifra
ctra
ddy.
Sau d6:
.4" Chu ki

dao
ddng
gi6m
di hai lAn.
B.
N[ng lugng dao
dQng cria con lic
git
nguy0n
gi6
tri cfr.
C. Dao ddng cira
con l8c c6 th6
kh0ng
phdi
ld diOu hda.
S.
Lgc c6ng cria ddy
treo hic
qua
vi tri cAn
bing
ting
l6n.
C6u 25: Mqt Id xo
c6 khdi lu'crng
kirdng
dang
ke dugc treo mQt
dAu vdo di6m O

cO Oinl vd dAu kia treo
mQt trong v{t
nh6. Khi v6t
dd nbm cAn bing,
kdo r'{t xu6ng
phia
du6i th€n-r
m6t doan 15 cm rAi n-Lg
nhdng thd.v4t ra.
Chon chrAu
duong cira
chuy6n
dQng
hLlo,ng l6n trdn,
g5c
toa dQ trung vcri
vi
tri cAn bing
cira vQt,
gOc
thoi
gian
ltc
thA v4i ra" ts6
qua
mgi
luc
c6n.
Fhuoug
trinh dao

dQng
cira
vAt
sd ld:
4"
lsl{e,-+),
E
t,Jt*[,
!-+)
c.
l5sin
(t
4)
m"
rsJzsm(
*.1),
C6u
26:
Trong
mQt
thi
nghiQm
giao
thoa 6nh sdng
dtrig
ddng thdi
hai 6nh s6ng
dmr sic chi6u vdo khe S.
M6t nguoi dung
kfrih

lirp
quan
sdt thi
th6y
tr6n
mdn c6 hai
hq
vdn
giao
thoa, d6ng
tho'i
gita
hai vAn s6ng
ct)ng mdLu vdi v6n
trung
tArn liOn
tiOp c6
hai
vAn s6ng
thuQc 6rih
si{ng c6 budc
s6ng
fu1 vA ba v6n s6ng
tlruQc
6nh
sang c6
budc
s6ng
?"2. Bi6t rnOt trong
hai btc

x4 c6 bu6c s6ng ld 500nm, x6c
ciinh cu
thd
gi6tr!
crlta
hr
vi
i\"2?
.4"Xr = 666nni; )'"2:500nm.
C"
?"r
:
500nm;
?vz
:
47 Snm.
C:6u
27: Ph6t
hiOn nhdn
dinh
sai
v€Laze.
.4" Chum
s6ng do
laze
phf$,
ra c6 cudng
d0 i6ri ld
do
tung

pLroton
trong
chiun co ndng iuong
l6n hon so
v6i
ndng
luong
photon
cing bu6c s6ng
phAt
ra tit ngridn
s6ng thOng thuong.
B" Su
ph6t
xa
cdm
ring
trong hoat
ddng ohalaze
ld
hi€n
tuQng
ph6t
sdng cfia nguydn
tri kich
thich ldri
c6 mdt
photon
thich
hqp

bay
qua
gAn
n6.
C" l"{udn phdt
duqc
birc
xa lazelh\
phAi
tao la
ducre
sp dio lQn
m4t dd
trong
mOi
truong.
D"Laze
ld
m6y
ph6t
5nh s5ng
nhd
hiQn tugng
phdt
xa cAm
rmg,
Cffu
2E:
X46t
v6t kh0i

luqng
m
:
10g
dao dQng theo
phuong
trinli
x
=
I0 stn},Z1n{pt
+ t}
(cm}.
'fm
gi6
tri cuc
ciaj eira
luc t6e dung l€n
vdt
vi
cira
th6
ndng
dao
dQng. LAy n2
=
IA
.
C6r,: 29: Ir4Qt pil0t6ir
duJr :;drng c;,i'a'ir
cir6n

kh6ng vdo
b6r-r
troing
mdt khdi th*y tinh.
F.l5ng iucrng
cua
pirot0ii
tt6
trolg
khdi'rl,r-i5' toil;
.1+"
dir-r:oc iSlig
ldii.
rri
iuuds;
s6ng
i:r:a;rirdtdli
giim.
ill.
i:i giii:;
itr vi vfln
t6c
trr;yAn
silg
irolig rllOi
trurrnq
giam
T:z::;31(,
-
ll,4A

cjd liii ir.:r
,,
C.
giii nguygn
nhu
cfi
vi
c6
vpn tOc 6n1-r
saiig iAn
'ouoc
soiig
dnh
s6ng
ddu
lthdng
d'Oi.
P"
gin nguy6n
nliu
cfr
vi
tAn sO ann
sSiig
irirdng d6i.
CSu
3S:
Clio
b6n
kim

ioai rnd
higl
tugng
qlrang di6n
chi
xhy
ralchi
b6n
clugc
chi6t'
bing
nirirng
churn
;il";r;r"g
t"*g
i;h;. ir"al
ta"g
i,s"v. iiera;gn
dchirguydn
to
e
:
1,5.10-1ec,
hi'g
so Flairck
h
:
S,1ZS.tO-'o
i,s,
uan tOc 6n1i s6ng

trong
chdn kh6ng
c
:
3.108
m/s.
X6c
dinh
gi6i han
c,uang
diQn
cua k-im
lo4i d6,
A"
0,4969 nm.
E" 49,69 nm.
C.0,4969
pm'
D"
4'969
nrn'
Cdu
31:
Quan
s6t
mQt
dao d$ng diAu
hda
cria mdt
vAt

nh6
c6
k4iOi
luqng
100
gam,
ngudi
ta thAy
9u
sau
0,5
giAy thi
vat fai
"a"nii
tti
"'a"
Uittg
nlifrng
doan'bihg
1,5cm.
gi6t
bien
d0
dao
dQng
cua
v4t id A
>
1,5cm,
tinh

ning lugng
dao
dQng cria
vAt:
,
J.
D.
Z,?S.l
0-1
J.
A.4,5,10-4
J.
8.2,25.10-3
J.
c.4,5'10-'J'
l)'z''2
Cdu
32: Bitit
c6c muc
ni.ng
lugng
ctra
cfc
tr4ng
th6i
dimg,
trong
nguy6n
tu
hydro

c6
bi€u
thitc
g"=-tgo/rl.gi6trengkhinguy6ntuchuy6ntirmircn:6xu6ngmircfl=1'thin6pht.t:'abircxac6
i"O"
*ng
%1.10-sm.
ffri
ng.typn
tir
chuy€n
tu
mitc
n
:
4 sang
muc
n
=
3,
n6
sE
ph6t
buc
x4
c6
bu6c
song
A.4,5,i0-6m.
dao

dQng
thdnh
phAn bdng
A" nl4.
ts.
nl3'
E. 1,81.10-6m.
C.4,5.i0-7m.
D.9,1.10-7m.
Cffu
33:
Ph6t
hiQn
nhan
dinh sat.
A.
S6ng
ld
qud
trinh
truyAn
pha dao
dQng
cria
ngudn
di
ra
xa'
.
n.

Van"tOc
s6ng
chinh
li'vdn
tdc
da.o
dQng
cua
c6c
phAn tt m6i
trubng
khi
c6
s6ng
truy6n
qua'
C. Tai
noi
s6n[
truyAn
qou,
dao
dQng
crta
cdc
phAn
tu
mdi tnrirng
li dao
dQng

cudng
bitc'
D.
S6ng
li
quf trinh truyAn
n[ng
luong
dao
dQng
tr: ngudn
di
ra xa.
CAu
34: .
Qu6
trinh
bien
d6i hat
nhan
sau
dAy
\l'U
n
?1n
X * Y-,
+Y"
+ Z,
+ Zrthuoc
loai

nio?
A.
hai lAn
phAn rd cr
cua U238
,m6i
tan
kdm
theo
mQt
ph6ng
x4
y'
B.
mQt lAnphAn
rd cr
vi mot
lAn
phdn
rl
p-
cira
[]238 .m6i
lAn
kdm
theo mQt
ph6ng
xa
y'
C"

hai
lAn
phAn
rd
B*
vi niQt
ldn
phdn rd
B-
cria
U238
kdm
theo
c6c
ph6ng x4
y.
D.
hai
lin
phdn
rd
B-
vd mqt
lAn
phAn rl
B*
cira
t/238
kdm
theo

cdc
ph6ng
xP
y'
Cffu
35:
M6t
khu
gia dinh tiau
rhu
mdt
cdng
suAt
diQn
ndng
trung binh
11kW
C6c
dqng
"u.11*
t]:: o
irrO"
aie, ,r,b
oiorr i"tt.
22av.
EiQn
tro
toan
phan
(g6m cd hai

day)
cua
day
tdi
diqn
tir
tr4m
diQn
v0
k&u'
;i;;t"h
rt;rl
J
;;. cong
suAt
hao
phi trungbinh
Jo_t6anliiQt
trcn
dudng
dav
tai
bing:
A"
10000w.
B"
12i00w.
c. i210w.
D'
1000w'

C6u
36:
MQt vat
nho
tham
gia
d6ng
th<ri
hai
dao
dQng diAu
hda cung
phucrn?
"ung
tAn
s6,
v6i
c6c
bi€n
;9
;l]*g
ri"g
dne
g
c3r
vd
5
rrn.
fr.Ct
quA

ld
dao
dQng
tdng
hqp
c6 bien
d0
7
cm.
E0
lQch
pha
gita hai
CAu
37:
Hat nhAn
con
sinh
ra sau
ph6ng
xa
p
Ld
'iL'
ca
'
H4t
nhAn
mq
ld

A.\l'l's
-
E.
lloae.
t.
f#
n^hAt
cach dumg
trung
truc
rndt k$oAng
blngXl6.
A.2nl3.
M"
xl2.
{" nl3.
Cftu
3E:
HQ s6
c6ng
su6t
cira
m4ch
diQn
xoay
chidu
R,L,C
Jchdng
phAn nh6nh
d4t

duoc
cuc
d4i
A"
khi
xity rucQng
hucrng
trong
d6
cudn
ddy
phdi ld
thudn
cdm'
ts.
chi khi hieu
did;#ilrrii
lar
tu
diQn
co
tri so
bing
hiQu
dien
thc
gifta hai
dAu
cuQn
dAy.

C.
khi
d0
lpch
pha
gifta cudng
dQ
ddng
trong
mpch
vd
hiQu
Aien
tn6
gifa trai
dAu
m4ch
bdng
900'
D"
1.$i xdy ra
c6r-rg
huong
vd klii
m4ch
chi
co
diQn
tro
thuan.

Cdnr
39: Hui ngu6,r
s6ng
k6t
hgp
Sr.vd
52,
'im
tr6n mat
ch6t l6ng
thgc
hiQn
c6c
dao
dOng
di0u
hda
theo
phuong.vuong
g6c
"oiriat
.t.,Aiiong
voi
tieu
t"_fh,"
ban dAu
9i'q
y,
X6c
diir!.P

l:et
ld"glel9"9lt
T]
irai
ngu6n
tu it
Sy
trong
s6 nhtng
diEm
c6
bi6n
dd
dao d6ng bing
kh6ng
thi
di€m
M
gAn
duo'ng
trung
tru.:c
a" nl6.
D"
rl2.
D"tn?
ae
'
W"
nl6.

C6ur
40: Cho
macir
di€n xoa.y
chi6u
Rtr-C
i<hdng
phAn
iiirinh,
trong
d6
R.
:
80
CI,
C
:
(50/n)
prF'
I-:
(1/n)
X-1, hi6u
diQn
,liie
nai
a6v
doair
m4ch
i,r7,.s
:

Uocosl00nt.
i:lAu
thSo
bd
tU
cri€n
khoi
nrach,
coul'
,,,,6t
iou i.ti-,iqt
,,rut mq.cir
tiray
d6!
niru
tii5
nAo?
.:
"
A. Cia*'Oi
n,l:
A;.
IE.
Kirdng
rioi.
C" Ting
1,En
n,l3
1dn'
D"

Gihiir
d}
2
r1tn'
nn.
i]IgAN
runruc
qro
cAq:
Tkf sinlt
c!$ daa c
ckan
{ir1t
nyt
tr:a:g
lrai
phi:n
('4
fwdc
E)"
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o
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46:
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xa
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it
c6
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6 M.eV.
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xa
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gi6 tri
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dign
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electron
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e:
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i:
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o++[1o5n
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tu

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ra
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cfiu
56:
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hiqu
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pha A)
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gi
tri

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''-vi1i.1e7
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:' lt'
cau
1: Sq
ph6ng xa
vd
phin
ring
phan
h4ch
gi6ng nhau
o di6m
ndo
sau day?
A. C6c
hat sau
phdn
ung
co s6
kh6i
ldn
ho'n c6c
hat
truS'c
plian ung.
B.

EOu
ld circ
phAn ung
h4t
nhAn
xhy
ta rnQt
c6ch
tg
ph6t'
C. Ddu
ld cdc
phAn ri'ng
h4t nhin
toa
n[ng
lu'o-ng'
D. DC
c6c
phin ilng
d6
xhy
rad€u
phai cAn nhiQt
dd
rdt cao'
CAu
2: Dao
d6ng
cira

mdt
vat
ld
tdng
ho-p
cua
hai
dao
d6ng
cirng
phuo-ng
v6'i
xr
=
4rDcos
2rt
(cn) vd x,
=4lE
sin
Znt
(cm)'
Kdt
luTn
ndo
du6'i
dAy
ld sai?
A.
Pha
ban

dAu
cita
dao
d6ng
tdng
ho.
p
rp
:
nl4'
B.
Tdn
sd
goc
cua
dao
dQng
tdng
lio.
p
co
:
2n
radls'
/\
C.
Phr-rong
trii-rh
dao
dQng

tdr-rg
ho.
p
x
=
8cos
I
Z,t
*{
|
itn't)
\
4/'
D.
Bi0n
dQ
dao
dQng
t6ng
ho.
P
A
:
8
cnt'
Cdu 3:
Quang
ph6 v4ch
phdt
xa cria

cAc nguydn
tO khac
nhau
thi kh6c
nhau
v€:
-
a. SA
f"q;g
ua.]r.
B.
Vi trf,
*Au si"
cia
vach.
C.
DO
sangli,
AOi.
D.
TAt cd
c6.c tfnh
chAt
tr6'.
Cf,u
4:
Mach
chon
s6ng
cira

rnQt
miy
thu
vd
tuy6n
diQn
gdm
m6t
tu diQn
voi
C,
=
1000
pF vd cu6n
c6m
v6i L
:
17,6
ptH. Miry
thu
bit
duoc
s6ng
c6 buoc
s6ng
250 m.
MuOn
b6t
dugc
s6ng

ngin bu6c
s6ng
10
m, ngudi
ta dtrng
rhern
m6t
tp diQn
Cr ,
H6i
phAi
rnic
hai tp
diQn
thii
ndo
vd C,co
gi6
tri
bing
bao
nhi6u?
A. song
song, C,
=
1,6
pF
B. n6i tiOp,
C,
=

16
pF
C. song
song, C,
=
16
pF
D.
n6i titip.
C,
=
1'6
pF
CAu
5:
Chon
cAu sai
?
A.
Mqi birc
xa
o.viurg
tu
ngoai
dau
bi
th?ch
anh
h.4p thr-r
hoitn

toiLn.
!
B.
C6 th6
ph6t vh
thu
tia h6ng
ngoai
theo
nguyen
tdc
phdt,
thu
song
v6
tuydn.
C. Buc
xldiQn
tir
c6 bu6c
song
cdng
ng6n
thi c6
tinh
d6m xuy6n
chng
rnanh,
cdng
d€

ion hoa
khdng
khi, dA
t6c dpng
16n
kf'h
d'h,
dE
ldm
ph6t
quang cic ch6t'
n.
guc
x4 dign
ti1c6
bu6c
s6ng
cdng
dai
thi cdng
dE
quan
s6t
hi0n
tuong
giao tiroa.
DAI
FIOC
QUOC
GIA rXA NqI

TFTU.ONG
DAI
INOC
KIIOA
I{OC T[J'NT{IE]\
Khdi FTTH
Cttuy€t1
Y417i
A. e(I
=
B.
e(J
=
C Auri,
htr,ni,.
DE
TrII
TIXU D+I
rXgC
NAM
2010
-
LAN 4
MON:
Vet Iy
Thd'i
gian
/dm.bdi:
90
phrit,

(60
cau trdc
ngltiQnt)
Me d6 rhi 309
pl-ruong trinh
lAn luo-t
ld
Cf,u
6:
C6ng
thirc
ndLo
duoi dAy
cho
phdp
tinh
bu6c
s6ng
nho
nhAt
ctra
tia
Ronglren?
(bo qua
d6ng
ning
cua
circ hat
khi
bflt

ra
khoi
cat6t)'
Ronghen
ph6t
ra
tu 6ng
C'eu-
ttL
D'eU=
f
-/
rnin
vdo hai
diu
rnQt
cuQn
d6y
co d0
tu
cdm L
:0'l
(H)
thi
n
:
4A. N6u
dEt
vdo
hai

dAu
doan
mach
ndy
di€n
6p
hc
1,ni,
CAu
7: Khi
d4t
hiQu
diQn
thti
kli6ng.d0i
40V
ddng
diQn
trong
cudn
dAy
co
cuong
dQ
I
u
=
100
cos(l00nt
- 4l

V
thi
bidu
thric
cira
dong diQn
trong
doan rn4ch
ld
,4
A. i=5cos(l00nt+ilo
)
B. i
=
5JI
cos(]
oont
-
I,
^
D. i=5cos(100nt-il^
C. i= t0J3
cos(l00nt
+i,
^
'frarro
1lA
-\,t^
rJA thi i09
Ciu 8:

Mdt
mach diQn
g6m
diOn tro
R
:
200 f), cudn
dAy
11'r.,6t-,
cAm
L
:ZlnIl,
vd tu
di€n
c6 thd thay
d6i
di0n
dr-rn-q C. Mic.rAo
hai dAu
rnach
di6n hi€u di6n
thd xoa1, chi€u co tJ:300
V.f
:50
Hz. Thay
d6i C dQn
gi6
tr1 dd
diQn
6p higu dung

trdn I{ dat
cuc
dai. Tinh C
do vir
gi6:
tri
hr€Lr
dung Unn,u,?
A. 18,9
pF;
250
V
E. I
5.9
pF;
300
V
C.20,5
pLF;
300 V
D. i 2,5
pF;
350 V
Ciu
9:
Trong
mgt
thi
nghiQm
giao thoa

song
trdn
mflt
chAt long, hai
ngu6n ktit lio.
p
A, B ddng
plia
daod6ngv6itAnsOf:
13Hz.Taidi6rnMc6chngtldnAm6tkliodng
dt=lgcm,cdchngu6nBmQt
klroAng dz=2|cm,
s6ng
c6
bi6n d0 cUc
d4i. Gifa
di6m M
vd
duong
trung
truc cria
AB
c6 3
vAn cuc
dai kh6c. Tdc d0 trul'€n
song
tr€tr
niat
chAt
long ld:

A.
13 cm/s
ts.6.5
cm/s
C.6,5
il/s
D. 13 rn/s
CAu
10:
Ba vach c6 budc
song
diri tlong
d5y Lairnan
cira
quang
phd
hidr6 ldn
luot lir )'r
:
0,1220
pm;
)"2= 0,7028
pm
I
7,r
:
0,0975J1m.
H6i
khi
nguyen

tu
hidrd bi kich thich
sao cho
6lectr6n
chul'[n ]611
qu!
d7o N
thi nguydn
tu co
thO
ph6t
ra
c6,c
buc x4
ung vd'i nhfi'ng
v4ch nho trong
ddy Banrne?.Tinh
nang
trrqng ct
^
fn-OtOn
(ra
don vj
eV)
ung
voi c6c
buc
x4 d6. Cht
hing s6 Plang
h

=
6,625.10-34 J.s
;
van t6c 6nh s6ng
trong
chdn kli6ng
c:3.108
m/s.
A. tHp=2,56eY^
e
,,
=1,90eV
B- tr,r=2,86€Y, €rt,,
=l,80eV
C, sH/)=2,56eY,
tr,,
=2,
10eV
O. t,,,,
=3,56
eY, ttt,,:l,90eV
CAu 11:
CAu niro
duoi
dAy
ld sai,
khi noi
v0
pin quang di€n?
A.

Ld rnQt
dung
cU
bitin ddi
trqc
ti6p
quang ndng thdnh
di€n nSng'
B. Pin
quang diQn
dugc sil
dung
niridu.tr'6n
c6c
v€ tinh nhAn
tao
vd
c6c
con tiu
vfl tru.
C. SLrAt
di0n ddng
cr-ra
pin
qllang diQn
rdt
lon cdn
di€n tro'trong
cira 116 thi
rdt nho.

D. Pi1ho4t dQng
dua vdo
hien
tuqng
quang
diQn
b€n
trong xAy ra trong
mQt chAt
b6n clAn.
CAu 12: MQt
vflt dao
dQng
di6u
hda
voi bi€n
dg A,
tAn
s6
g6c
co.
DQ lon
v
cita
v6.n t6c cua vat tai
li d6
x
duoc tinh boi
c6ng
thirc:

B,
v=co
f).
v=
CAu
13: Tinh
n6ng lugng
liOn ktlt
ri€ng
cira
hat nhdn
iiXu
Cho bitit
kh6i
iuo'ng cua c6c
hat
proton,
notrotl, hat nhAn
natri
nhu
sau: mn
=
1,0087
u,
flNu
=
22,9850u; 1 u
=
937,5
MeV/c2

'
A.7,095
MeV
8.8,088
MeV
c.6,432MeY
D.5,745
MeV
Ciu
14: MQt sqi
dAy
c6 dAu
A buQc
c6
dinh,
dAu O
dao dQng nho t4o
thdnh rnQt
s6ng
voi
bu6c
song
, ) I :,
^
-'
'. ^l
bang
J n1 cnay
ve
phia A .

V6'i n 1i.rn6t
s6 nguy6n
duong tuy
y.
Trdn
d6y s0
c6 s6ng dtrng
khi chi€u
dii / cua ddy
tinh theo
don vi
rn6t blng:
A. 3n
+
0,75
B.
l,5n+3i
8
C. l,5n
+ 0,75
D. l,5n
fr
lr A
A. v= ,lx'-
^
\
a.t'
fn
c.
y:

Jrt
*a
\o-
Ciu
15: MQt
con
lic don
c6
chu kj'dao
dQng
bing
2 s t4i noi.cil
gia
t6c trong
truong
g:9,8
rn/s2.
Truydn
cho
qua
cAu
ctra con
lic mbt
diQn tich
q
:
Z.t)t C, r6i
dat n6
v2ro rn6t di€n
truo'ng

ddu co
cudng
dQ
2,17 .105
V/m
vir c6
dud'ng
sric
nim ngang,
song
song
voi mdt
phang
dao ddng
cria con
l6c.
Ift6i
luqng
cria
qua cau
ld 20
g.
chu
kj'cira
con
l6c
trong diQn
truong li
A. 1,96
s

B.
1,85
s
C.2,57
s
D.2,04 s
CAu 16:
MQt m6y
ph6t diQn
co
phAn
cArn
g6m 4 cqp
cuc
vir phAn ring
g6m.2
cuQn dAy
mac nOi tiep
ph6t
rarnQt
hiqu
diln
thti
"ouy
rl'tieu
c6 su6t
diQn dQng
hiQu dpng
220
V vd tAn sd 60

Hz. T6c dd
quay
cira r'6to
ld:
A. 3600
vdng/phirt
B. 1800
vong/ph[rt
C.
900
vorrg/phirt
D. 450 vdng/phirt
.
('l-
-\
Ciu
17:
M6r con
lic
ld xo dao
dQng
diAu
hda v6i
phuong trinh x=8cosl:,_
1)A^1.
Tai tho'i
,.i , r
'
;
.,^.^.,tt-!^AliAA'

diern
r, v?t
o vi trix,
=
*4
cm vd di
theo
chi6u duong. Sau
0,5 s kd
tu thoi di€m
t,
vdt d vitri co li
d0:
A.4crn
B 4cm
C.Scm
D 8cm
Ciu
tr8:
Mdt con
lic
don
g6rn
mot
vit nho cO kh6i
luo-ng
m
:200
g,
treo o

ddu m$t
scri dAy m6nh,
chi6u ddi
I
duoc
kfch
thich clio dao
d6ng
di€u
hoa.
Trong
khodng
thoi
gian
At con
lac thuc hiQn
40
dao
ddng.
I{ri tang
chiOu ddi con
16c
tirdm
ni6t do4n bdng
7,9
cm, thi chng
trong
khodng
thoi
gian

At
'1,.,,,^^
1lA l\,4; ,{A rl-i ?OO
n6 tliuc
hiQn
duo.
c 39
dao
d6ng.
khi chua
tdr-rg
chi6u
ddi 1d:
A. 1,475 s
r} 1 /?<
-
!r. l-a /
-'
J
D. 0.475
s
Cdu
19: O
ddu
xuAt
hign
diQn
tu trudlg
bi6n
thiOn?

A. Xung
quanir rnQt
diQn
tich
c6 dinh
4
.
B. Xr-u-rg
quanh
m6t
tia
lira
di0n'
C.
Xung
quanh
niQt
6ng
ddy
co dong
diQn
kh6ng
d6i'
D.
Xung
quanh
mQt
h0
hai
qud cAu

tich
di€n
tr6i
diu'
CAu
20:
rr,lOi oon
6ng
duo.c
mac
vdo
mang
di6n
xoay
chi6uc6
hi6r-r
di6n
th6
hiQu dpng
220Y.tAn
sd
50
Hz.
Ddn
s6ng
khi;6
l6n
diqn
ap
tuc

thd'i
Z
156
V. Tinh
tho'i
gian
cldn
s6ng
trong
m6t
cliu
k! cira
ddng
diQn
xoay
chi0u.
A.
0,0067
s
B.
0,0133
s
CAu
21:
So
vdi
su
PhAn
h4ch
thi

A. s6,n
phAnr cta
ph6,n ur-rg
nhi€t
hach
"s4ch"
holt'
B.
n6ng
luo'ng
nhiet
hach
nh6
hon.
C.
phan u,tg
nt
i6t
tractr
Ae
didu
khi6n
ho'n'
D. nliiCn
liQu
nhiQt
l-rach
hi6m
hon'
Ci,v 72:

Chie,
m6t
chur-n
bu'c
xa
do'n
sic
).
=
405
nm
vdo
cat6t
cira
mot
t(1
biro
quang diQn'
t4o ra
dd'g
quang diQ'
bdo
irda
v6'i
cudng
d9
0,48
mA.
GiA
su

2000
ph6t6n
d4p
vdo
catdt
ldm bAt
ra
1
.l iron.
gieto.ol6ndiQntichciraelectronla
lel=1,6.10-rnC.
Cho
h=6,625J0-34
Jsvir c=3.i08m/s.
t.
C6ng
suAt
cita
churn
birc
xa
chiOu
r'iro
cat6t
Id:
c.
1,55
W
D.2,94
W

thoi
di€m
ndo
do
huong
chuy6n
ddng
cira
di€rn
A
A.3,94
W
B.
1,64
W
Cho
gia t6c
tror-rg
truong
g
:
9,8
il/sr.
Chu
ki dao
d6ng
cua
cori l5c
C.
0,01 s

D.0,02
s
Ciu
23:
MQt
song
ngang
truydn
trdn
sgi
dAy'
Tai
tr0n
dAy
nhu
hinh
ve.
Hoi
song
truyOn
vC
phia ndo?
C6,u
24:
MQt
dQng
co
kh6ng
d6ng
bQ

ba
pha.mlc
theo ki6u
hinh
sao
v2to
m6t
mang
diQn ba
pha c6
hipu
dien
tnb aay
]so
v. D6ng
.o .o
c6ng
suAt
6
kw
vh costp
:
0,85.
cuong
d0
hiQu
dung
cua dong
C6u
25:

Trong
thi
nghi€m
l6ng
vii
giao thca
6nh
s6ng,.kho.dng
c5ch
giira hai
khe St'
Sz lh
a:
I mm,
kho6ng
c6ch tri
hai
khe
d6n
miur
quan
sit
D
:2
m.
ctri6u
ddng
thdi
hai
bri'c

xa
don sic
co buoc
s6ng
l.r
:
0s
pm
vi
)"2:
0,5
pm viro
nai
ttre
tlii
th6y
tr6n,min
c6 nhimg
vi tri
tai
116 van
s6ng
cria
hai bitc
xa
trung
nhau,
ggi ld
van
trirng.

Khodng
cd,ch
nho
nhat
giira hai v6n
trung
lh:
A.5mrn
B.7mm
C'4mrn
D'6mrl
Ciu
26:
Tia
s6ng
khi
truyAn
ngodi
kh6ng
khi
c6
buo'c
song
632;8
nm,
khi
truydn
trpng
nuoc
buoc

s6ng
cira
tia s6ng
ndy
Uing
bao
it"tieu
t
gi-et
chi€t
suAt
cua
nudc
aOi
vOi tia
niry
ld
1,42'
A.
545,8
,',rn
B.
445,6
ntn
C.
898,6
nm
D'
445'6
ntn

C1,,,_
27:
MQt
do4n
mach
xoay
chi6u
gdm
mQt
cudn ddy
co
di0n
trd R
=
40 O
vi dQ
tg cdm
L
mic ndi
titip
v61
m6t tu
dign
co
diQn
dung
C.
EiQn
6p
gifia

hai
dAu
doan
m4ch
ld,
tt=80cos100zt
(V)'
Biet
cac Aien
6p
hiQu
dulg
tr€n
hai
dAu
cu6n
dAy
ua
tr6n
tu diqn
lAn lugt
la
50
V
vd 70
V. Gi6
tri
cria
L vir
C IAn

luqt
ld:
A.0'su,-]
-e
B.0'5n,*
e
c.0'3H,-5F
D'0'3H,*^r'
7r
'
300()n
7t
70A0n
rT
'
^
'
5000o
7t
'
7000.n
Ciu
2g:
Hat nhAn
p6l6ni
tlf
po
phong
rahat
u

vd bi€n
thdnh
hat
nhAn
bhi
(Pb)
bdn.
Ban
dAu
co mOt
nr5u
p6l6'i
'guy€n
chAt.
giet
chu
ki
bfnrd.
ctra
p6l6ni la
138,38
ngiy.
H6i
sau
bao
lau
thi ti
lQ
giira
kh6l

iuqng
cf'ti
va
kh6i
lr-rgng
p6l6'i
cor-r
lai
trong mfiu
1d'0,7?
A.
138
ngdy
B.
i07 ngdy
C'
69
ngdy
D'
168
ngdy
A.
Tt
N sang
M.
B.
Tn'M
sang
N.
C.

Tt
tr6n
xu6ng.
D. Tt
dudi
lOn.
diQn
ch4y
qua
mdi
pha cta d6ng
co
ld:
D.32,1
A
A.
10.7
A
B. 18,5
A
c.7,73
A
Trqno 116
-
Md r{A thi 309
C*u
29: Tror.ig
rn6t
phan irng hat
nhAri

khdng co
slr bAo
todir
A.
sO
proton.
C. so nuclon.
B.
dQng
luo-ng.
S.
niurg
luong
toart
phAn.
Cdu 30: Trong dao dQng
co
cudng buc
hic
xhy ra cdng
hu6'ng
A,
luc cudng bu'c
co
nhfr'ng
thcri di€m
nho
hon lu'c
can cira m6i
truo'ng.

B. luc cudng buc
kh6ng
thgc
hiQn
c6rig
16n vAt dao
dQng.
C. luc cu6'ng birc
ludn
cring
hu6ng
v6'i
vdc to vAn
tdc vat dao dQng.
D. bAn
chAt hiOn
tuong
cfrng
gi6ng
nhu
dao cl6ng
duy tri.
Ciu 31:
Dung rnQt
proton co
dQng
nlng bing
1,6
MeV bin
vdo hat nhdn

lf-i
diurg
y€rr
thi
thu duo-c
hai hat cr
gi6ng
nhau
c6
cirng
d6ng
ndng.
Tim
d6r-rg
ning cta
rndi hat. Cho ffio
=1,0073u.
ffiLi
=
l,0l44uvd
mo
=
4,0015u,
lu
=93I,5MeV/c2'
A. 19,0 MeV
B. 8,5
MeV
C. 10,5 MeV
I). 9.5

MeV
Ciu 32: Trong
m4ch
diQn
g6m
R,
L thuAn
cdm
vh C mac nOi
tiep
viro
hi6u dien
thd
xoay chiAu u,
A. ux ludr-r
cung
pha voi u.
B. un s6rir
pha
hon
us.
C. kiri ur-:0
thi cuo'ng
dQ clong
di€r-r
trong
mach
bing 0.
D. u6'nguoc
pha vdi

u1.
Cdu
33: ChiiSu
6nh
s6ng c6 bu6'c
s6ng
0,3
pm
vdLo
cat6t cria
mOt t(5 bdo
quang
diQn co
gioi
h4n
quang
diQn ld 0,453
pm.
Bi6t
d0 16n
diQn
tich cria
electron
la
lel=1,6.10-reC.
Cho h: 6,625)0-34
Js; c:
3.108
rn/s. D€
dong

quang diQn
triQt
ti6u,
phii d[t mQt
hi€u dien
th6 ham ld:
A 2,4Y
B.
1.4
V
C.
1,2 V
D. 0,4
V
Ciu
34: Cho
mach diqn
xoay
chidu
gom
mQt diQn
tro R: 1000
rn8c ndi.ti€p
vdi mQt tr,l diQn C
vd
r ,.^.
^"
.:^
;
'

m6t
ampe k0 nhiqt,
Bo
qua
diQn
tro'cua
ampe kd
vd dAy
n6i. Dat vdo hai
d6u cia mach
diQn mQt hiQu
diqn th6 xoay
chi€u
u
:
200
rD
cos 1 00nt
(V)
thi
ampe
kti chi I
(A).
Di0n dung C cira
tg rliQn co
gi6
tri ld:
A. i 8,38
ptF B. 10,38
pF

C. 31,83
pF D.
8,38
pF
CAu35:Chodoanmachg6mR,
L,Cmhcn6ititip,
L=llrHvitC=10-al3n
F.Micvdohai dAu
doan mach
hieu diQn
th€ u
=
200 cos 100
nt
(Y),
thi
thAy ddng diQn I
s6m
pha
rc
l6
so
v6i u. C6ng suAt
tr6n doan macl-r
lh:
4.40,6 W
B.
45,8 W
C.
43.3 W

D.
38,5
W
CAu 36: MQt mach
diQn
xoay
chi6u
g6rn
diQn
tro
R, cudn thuAn cAm
L vh tu
diQn C nOi tiilp. Dong
di€n trong mAch hi6n
t4i dang
trd
pha
so v6i
diQn
6p hai
dAu cloan mach
rnQt
goc
nhd hon nlL. Grit
nguy€n
Rvd
C, tdng.L,k6t
lu{n
ndLo
dudi ddy

ld sai?
A.He s6
cdng suAt
cuu
doan
mach
giim.
B. Cuo:ng dQ
dong
diqn
hiqu dung
trong
mach
giirn.
C. HiQu diqn th€
hiQu
dgng
tr6n tu di0n
giArn.
D. C6ng suat
tr€u
do4n
m4cl-r t[ng.
Ciu 37:
Bi6t
cdng
su6t
diQn cAn truydn
di P:
22MW;

di6n
6p
hiQu dpng
no{ truyAn di U:
110 kV.
Mudn
c6ng suAt hao
phi tr6n duong dAy
kh6ng
vugt
qu6
10 %
c6ng sr,rAt cAn truy0n
di thi diqn trd
crjra
duong
dAy khdng duoc
lon hon
gi6'i
h4n
ndo?
Cho r6ng
cos<p cta todn rn4ch
b[ng l.
A. 550
f)
B. 5,5
C)
c. 5s00
f)

D.
55
f)
.i
quan
d€n
hi0n tuong
giao
thoa 6nh
C0u
38:
Trong c6c
trud'ng ho.
p
dudi
ddy,
truo'ng hgp
ndo li€n
s6ng?
A. Mdu
xanh tr6n bi€n
b6o
giao
th6ng khi
dugc chir5u
s6ng tu ddn
pha
616.
ts.
Cdc

vach
rlo vdr
vach
t6i
xen kE
nhau khi hai chirm
sdng
clo
giao
nhau.
C. Mdu sic cria 6nh
s6ng
tring sau
khi
di
qua
lang
kinJr.
D. Mdu
sic cira cAu
v6ng sau con
mua.
CAu 39: M6t rndy
ph6t song
di€n Iu'
dang
phdt
s6r-rg
theo
phuor-rg

thdng dung huong
lOn.
Bi€t t4i dierl
M trdl
phuong
truyen
vdo tho'i
di6m
t,
vdc
to
cdm irng tu
dang cuc dai
vd hu6'ng v€
phia
tAy. Vdo tlioi
'I ^,4^ A lA ]\/; ,{A +l.i ?nO
di6m
t
thi vdc to cr-rdrng
d6 diQn trudng
dang
Cffue
,{0:
Dac diOm ndo
duoi
dAy ciri
r"5 sr:1ih6c
nhau
giira

song di6r-1
1ir
rid s6ng
co?
A.
crLc dai
va
hui'ng
r
i
p)ria bic
C.
bing
0.
A.
Truydn
duoc tt'ong
chAn
kl-rdng.
C.
Bi nhiSu
xa khi
g[p vflt cAn.
B. cuc
dai
vir hu6'ng
v€
phia
nam.
D.

cuc dai
r,)r hr-r6ng
r,€
phfa
ddng.
B.
La s6ng
ngang.
D.
Mang
ning
luo, ng.
II.
PHAI\I
RIENG
(i0
cf;u).
Thf
sinh
ctrri
chgn mQt
trong
hai
phln: A
hohc
B
Ptrdn
A:
Theo chucrng
trinh

chuin
(10 cfttt,
tt\'cAu
41 d'!n
cdu 5Q'
Ciu
4l:
M6t mach
dao
dQng
goin cudn
thuAn cdm
L=50rnH
vd tu
diOn C=5pLF.
Bi6u thirc
cua
cuorg dQ
dong
di6p
rrong
mach
li
I
=
0,08cos(20001)
mA.
X6c
dfnh
dQ l6n

diQn
tich tr0n
mQt
bdn tu
diQp
tai tho,i
diem
gi6 tr!
rric
thoi
cua
dong
dien bing
0,5
cudng
dQ dong
diQn
hiQu dpng.
A. 5,58,10t
C
B. 7,52.10-8c
c.
3,75.10-8
C
D.
7,56'10-6C
C6tu
42; H9
Mat
Trd'i

g6m
A. Mat
Troi o.trulg
t6m
h€,
8
hdnh
tinh
lci'n
vd
hdng nghin
1i0u
hiurli tinh,
chc sao
cl-r6i.
thi€n thach.
B. Mat
Troi
o
trun[
tArn
hQ, 7
hdurh
tin]r
l6n
vir h]rng
nghin ti6u
hdnh
tinh.
C.

MAt
Trd'i
o trung
tdm
hq vd
7
hhnl-r
tinh
l6n.
I). MAt
Tro'i
o
trung
tAm
hQ
vd hang
nghin
ti6u
hdnir
tinh'
Cdu
43: Radon
,linn
ta
chAt
phong x4
o.
Bao
nhiOu
Yo

ndng luong
toa ra
chuydn
thhnli
ddng
nang
cira hat
cr? Kh6i
lugng
c6c
hat nhdn
duo'c
l5y
gAn
dung
bing
gi6trl.ua s6
khdi
trong
don
vi
u.
A.97
%
8.95
%
c-
98 %
D.96
%

cfiu
44:
Chat
dicm
m
trong
dao dQng
co
didu hoa
d6i
chidu.ciruyon
dQng
khi
-
n.
tU.
trOi
phUc
AOi
cnieir
B. luc
h6i
phqc cti
dQ lon
cuc
dai
c. luc
iroi
ptruc co
d6

lo'n
cuc
ti€u
D. luc
h6i
phpc b[ng
0
ciu
45: Tro'g
c6ng
thuc
tinh
mirc
cud'g
dQ
drn L(dB)
=
10lg -l-
,
t ta
cuong
d6
6'r,
cdn Io
ld
lo
A.
id
cuong
d0 6m

chuAn
co
gi|tri ti
le
thuAn
voi
tAn s6
cua Am'
B. lA
cu,ong
d0 6m
nho
nhAt
tai
tAn sO
tOOO
Hz
mir
tai con
pguoi
co
thii nghe
ducrc.
C.
Id cuong
d6
Arn chuAn
co
gi6
tri nhu

nhag
tai
moi
tAn s6
cua Arn.
D. ld
cudng
dQ nho
nhAt
cua
Am
gAy
ra
cdm
gi6c dau
tai'
Cdu
46: Trong
c6c
kt5t luAn
sau,
k6t
lu4n
ndo
dirng?
A. U235
ph6p hach,
ndng
lu'crr.r_e
toa

ra
khdng
php
thuQc
vdo c16ng
ndng
cua
ncrtt'olt
nrdr
n6 bdt.
B.
MOt
hat nhdn
n[ng
o trang
th6i 6ri
dinh
co
th6
tu nhi6n
phdn h4ch.
C.
N[ng
luong
phAn hach
l2r
ndng
lug3g
nghi
cua

cdc
hat tao
thinh.
D.
Nang
luqng
kich
ho4t
phan
hach
bing
ndng
luong
t6a
ra sau
mdi
phAn h4ch.
CAu
47:Trong
thi
nghiQrn
Young,
khe
S
duoc
chi6u
boi
6nh
sdngfi.hng,tr€n
mdn

3ua1s6id*:.,
A.
VAn s6ng
tran[
nirn
chinl-r
gifa, hai
bdn
li cdc
vdn
mdu
c6 m6p
trong
(g6n
vAn trang)
mdu d6,
mdp
ngodi
tim.
b.
fr4Qt
dAi s6ng
mdu
bi6n
thi6n
li€n
tuc
tu
dd
d6n tim.

C.
Van s6ng
tr[ng
lim chinh
giira" hai
bdn
(gAn
vAn tring)
ld
qr-rang
phO
li€n
tr.rc blc
1. tr] rrdr-t
tirn
,t
den
do.
D. C6c
vach mdu
riOng
bi6t
tr0n
mQt
n€n
t6i'
Ciu
48: MQt
vAt dao
dQng

di€u
hoa
voi
phuong trinh
x
=
1A cos(2rt
+
t l4)
crn. Tim
qudng
duong
v4t
di dugc
trong
kho6ng
tho'i
gian bdng
12,25
chu
kj'.
A.514,1
cm
8.490
cm
c.494,1
cm
D.480
cm
CAu

49:
MQt
do4n
mach
nOi
tiep
g6m cu6n cdm
c6 diQn
tro'R
I
0,
vd
tr,r diQn
C. Di0n
6p hiQu
dgng
. .t
glua
hal
dau
doan
mach
la
120
V,
giira hai bAn
tu
di6n
li
26.5V.

?dng
di€.n
trong
rn4ch
som
pha
-r
I
4
so
v6i diQn
dp
gifr'a
hai
dAu
do4n
m4cl-r.
Tirn
dign
6p hiQu
dung
giff'a
hai
dAu
cudn
dAy.
A.
160
V
B. 199

V
c'
180
v
D.
150
V
CAu
50: Thu
tq
c6ng
vi€c
thuc hiQn.phdt
thanh
bing
song
diQn
tu nhu
th6
ndLo
ld
dung?
A.
Tao ,o'g
,rru,-,!,
tao song
6r',i
tAt.
tou
do tr6n

v6i
nhau
r6i khutich
clai
dua
d€n
anten
phit.
'r ^,
< lA l\/; JA +1.; ?nO
B. Tao
s6ng Arn tAn
bing
micro
sau
d6 khutlch d4i
10n
roi
d€n
anten
ph6t.
C.
Tao
sotlg lrang
tOi
t-u
Arn thanlt
rrd,o
sau do
khu€ch

dai rdi
d€n
anten
ph6t.
D.
Tao
s6ng Aur
tAn
bing
micro
sau
do
khu5ch
dai l6n
dua ra
loa.
phAn
B: Theo
chucrng
trinh
ndng
cao
(10
cfrn,
tiy
c6u
51
d1n cdu
60).
CSu

5I: lr40t
c6lh
quat
quay
ddu,
cir
m5i
phrit
quay
duoc 30
vdng. Tdc d0
ddi
vd
gia
tdc cua m6t
diiirn M tr6n
c6nh
quat. c6ch
truc
qr-ray 50
crl
bang
A. 31,4
crn/s;
49,3
cm/s2
B.15,7
cm/s;
49,3 cm/s2
C.157

cm/s;493
cm/s2
D. 15,7
cm/s;
493
cm/s2
CAu 52: MQt
b6lh
dd dang
quay
cluanh
truc cd
dinh
vo'i t6c
d0
g6c
120 radis
vd d6ng
ning
qr-ray
36
kJ.
T6c dung
vdo b6nh
dd mdt
inomen
hdm
thi
sau 3
s n6 dung

lai.
Tim momen
hdm do
A.
-100
N.m
B.
-200
N.m
C.
-300
N.rn
D'
-150
N'm
Cdu
53:
M6t
dodLn
tdu k6o
m6t
h6i
cdi
ddi
trong
khi dang
chuy6n
dQng thbng
ddu
vdi

vAn tdc
v
:72
krn/h. Coi
coi
thu
lir rn6t
ngudn
Ani
di6m
c6
tAn
sO
khdng ddi
f
:
l440Hz;
t6c
dd Arn
truy0n
trong
kh6ng
khi
r,,t: 340m/s.
MQi
m6y
thu
dit o.udi
tdu
sd

thu duoc
drn
do cdi
tdu
ph6t
ra c6 tAn sO
A. I44AHz.
B.
1360H2.
C.
^,
I 355H2.
D' 1530H2'
CAu 54:
M6t
doirn
tdu
c6
vi6n ngdi
canh
duong
ray.
A. L.
I)
_!-D.
chi€r-i
cldi
tinh
L chuy6n
dQng

thing
ddiu
v6'i t6c d0
v so
voi inQt
quan
s6t
Quan
sdt
vi€n
do
do dugc
chiOu
ddi
cua no blng
L
-_
/r-v-
Vc'
a1
c.
r-^/i-f
\lc-
r,
lv-
D. L.li +
Vc'
Cflu 55:
ph6t
bi6u

ndo sau
diy
sai
kiri
noi
vA chuy6n
ddng cluay
cira m6t
vdt
rin co
truc
quay
cd dfnh
?
A. Khi
vat
quay deu thi
nhfing
di6rn
cdng
xa
truc
quay cdng
co
gia
t6c
16'n.
B. M6
men
qu6r1 tinh

cria vAt
rin
php thuQcvho
vi tri trgc
quay
cira vq.t.
C. Ntiu
t6ng m6
men
lgc
tic
dpng
lOn v4t
eOi
vOi
truc
quay
ndo bing
khdng
thi
momen
d6ng luong
cira
vAt
OOi
vOi truc
quay do
dugcbAo
todn'
, _ : . ! . .

D. N6u
v4t rin
quly
ti6n
d6i dOu
thi
gia
t6c cira
m$t
di6m
Uat t3,tr6n
vAt kh6ng d6i.
Ciu
56: Khi
ta chi6u
6nh s6ng
tring
vdro mdt
vAt thi
ta nhin
thAy
v.at c5 mhu
do. N6u
chi6u ddng
tlioi
, !
;

t

:^
lr
rr r1.r r^
6nh sdurg
trdng
vir rndt
chum
s6ng
mdu
luc
vdo v4t
do
thi ta nhin
thAy v4t
c6 mdu
A. den.
B. dti.
C.
virng.
D.
luc'
Ciu
57: Xdt
di6m
M
tr$n
mdt
vAt
rin
dang

quay bitSn
d6i ddu
quanh
mQt
truc
cO
Oint',. Dai luong
ndo
cua di6m
M khdng
thay
d6i
khi
vat
quay?
A. T6c d9
dei
B. Gia
t6c
hu6ng
tAm
C. Gia
t6c ti€p
tuy6n
D.
Qu6ng
duong di
CAu 58:
Theo
thuy6t

Big
Bane
A. vfi tru
6 trong
tr4ng
th6i 6n
dinh,
kh6ng
thay
d6i.
B. vfr
trp do mQt
ddng
t6i cao
tao ra.
C.
vir tru cltro-c
tao
ra bcri
m6t
vr-r n6
cuc
l6'n,
cuc
manh
vh clang
ddn. ncr
va
lodng
dAn.

D. vfr
trp khdng
c6
di0m
bit dAu
vd
kh6ng
co di6rn
k6t thric.
Ciu
59: MQt
con
l6c
do-n
dang dao
dQng
di6u
hda
v6i bi€n
dQ
g6c oovd tAn
s6
f trong
thang m6y
dri'ng
yen.
N6u thang
rn6y
di
l6n

nhanh
dAn d€rr
vdo thdi.di6m
vat dao dQng
dang
c6 t6c
d0 bing
0 thi sau
khi
thang
rndy
dd chuy6n
dQng,
trong
hd
qLry chi6u
gan
voi
thang m6y
A.
co ndng
dao
dQng
kh6ng
d6i.
B.
bi€ri
dQ dao
dQng
l6n hon

cro.
Ciu
60: MQt
rdng
roc
c6 b6n
kfnl,
20
cm,
c6
momen
qudn tinh 0,04
kg.m2
aOi
vO'i truc
cita no. Rdng
roc
chiu t6c
dung
cua
mdt lgc khdng
d6i
1,2 N
ti€p tuyOr'r
v6i
vdnh.
Lirc d6u
rong
rQc
dri'ng

yOn;
bo
qua
sirc
chntdc
dung
lOn
rdng roc.
T6c
c10
g6c
cira
rdng
roc sau
khi
quay
duoc 5
s bdng:
C. vft dao dQng
v6'i
tAn s6
nho hon
f.
D.
lLrc cing
cuc dai
cira dfly
treo tdng.
C. 30 rad/s
D. 45 radls

A. 25 rad/s
B. 15 rad/s

HET
-t, ,"-
A/E \l; JA rl.i ?OO
oAp Au
rnAc NGHIEM
uox
vAr
rv
t*'
l
ua oa tso
1.
C
2.D
3.8
4.D
5.D
6.8
7.D
8.8
9.A
10. B
il.A
12. D
13. C
14. A
15. A

16.
D
17. A
18.
D
19. D
20. c
21. B
22. B
23. B
24. C
25.
C
26. A
27. D
28. D
29. B
30. A
31. A
32.
A
33. C
34. C
35. B
36.
D
37.
C
38. A
39. B

40. B
41.
C
46.
D
42.
C
47.
C
43.
A
48.
C
44.
B
49.
D
45. C 50.
C
M6 dC 235
1. A
2.D
3.D
4.D
5.8
6.A
7.
D
8.C
9.8

10. c
11.
D
12.
A
13. C
14.
B
15. A
16. A
17. C
18. D
19. C
20. A
21. B
22.
A
23. C
24. A
25. A
26. B
27. A
28.
C
29. D
30.
c
31. A
32. D
33.

C
34. D
35.
D
36.
C
37. C
38.
B
39. B
40. D
41. B 46.
C
42. 8
47.
8
43.
B
48.
D
44.
C
49. B
45. D 50. C
ua ac ssz
LA
2,C
3.C
4.A
5.D

6.D
7. D
8.C
9,D
10. B
11.
D
t2. B
13.
B
14.
A
15. D
16. C
17. B
18. D
19. A
20. c
21. D
22.
C
23. A
24. A
25. C
26.
B
27.
C
28. B
29. B

30.
A
31.
D
32. A
33. D
34. D
35. C
36.
D
37. B
38. B
39. A
40. B
4t. B 46. B
42. B
47.
D
43.
B
48. C
44. A 49. A
45. C 50. C
nna oo
+ss
1.A
2.C
3,B
4,D
5.D

6.A
7.
B
8.C
9.B
10. D
11. D
12.
A
13,
B
14.
D
15. c
16. A
17. C
18. A
19. C
20.
c
21. B
22. B
23. B
24. c
2s. B
26.
C
27.
A
28. A

29. D
30. c
31.
A
32.
D
33. C
34. D
35. A
36.
B
37.
B
38. A
39. A
40.
B
41.
D 46. D
42.
B
47.
A
43. A 48.
C
44.
C
49.
C
45. B 50. D

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22. A
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31.
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32.
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36. C
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40.
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41. D
42.
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43. C
44. A
45. A
46.
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47. D
48. ,.d
49. A
50. D
51. !l
52. W
53.
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54.
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55.
C
56.
D
57.
B
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59.
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60. c
M5
.t6: 620

1. B
7.
2. D
8.
3.D9.
4. B
10.
5.
D
11.
6. B
12.
B
D
B
A
B
(-
13. D
14.
D
15. C
16.
B
17. D
18. r)
19.
c
20.
A

2T.
D
22. B
./J. L
24.
B
25.
C
26.
B
2'/.
B
28,
C
29.
A
30.
c
31. D
32. A
33.
C
34.
A
35.
A
36.
B
37.
B

38. C
39. B
40. A
41. A
42. C
43.
C
44.
A
45. D
46.
D
47. A
48. A
49. C 55.
50.
A 56.
51. A 57.
52.
B 58.
53. A 59.
s4. c 60.
D
B
D
D
A
C
M5
tl6:

735
1.C
2.8
3.D
4.D
5.D
6.B
7.
B
8.8
9.C
10.
B
11. c
t2. D
19. A
20.
B
2t. B
22.
C
23.
B
24. B
25.
C
26.
D
27.
A

28.
A
29.
B
30.
A
31. D
32. B
33.
A
34.
B
35.
B
36.
D
3',7. C
38.
D
39.
C
40.
A
AI A
il. d
42. A
43. C
41. B
45D
46.

C
47. B
48.
A
49,
C
50, D
51. D
52. C
53. D
51. C
55. A
56.
A
57. C
58. A
59. A
60.
A
13. D
14. A
15. B
16. D
11. c
18. D
M6
d6:
1.B
2.C
3.D

4,C
5.D
6,C
848
7.
B
8.8
9.D
10. B
11. A
12. B
19. C
20.
D
21. C
22. B
23. B
24. A
25.
D
26.
C
27. B
28.
D
29,
B
30. A
31. B
32. B

33.
B
34.
B
35.
D
36. C
37.
A
38.
A
39. A
40. A
41. D
42. B
43. A
44.
A
45. D
46.
C
47. A
48. D
49. B
50.
c
5r. D
52. C
53. B
54. D

13.
14.
15.
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17.
18.
A
D
A
C
A
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C
c.
A
C
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Gi6i: W,= Wa +
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ld:
I
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=
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vi tri cdn
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ldc dao d6ng diiu
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do A
:
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c6 d6 l6n
ld:
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-
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=
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ki dao dong ctra vdt ld:
-
^,.,. "-).
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a,
'a
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cua vAt
chi bdng
m6t nua tAn
sd
bi6n thi6n cua d6ng ndng
=
fq: 2,5
Hz
=
T
=
l/f
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s.
Cliw
4. Con
ldc clon
c6 chiiu
ddi I
=
20
cm.
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:0
con
ldc dve'c
trryin vdn toc l4 cm/s
tivi
tri
cdn bing theo

ciri€tr
cl.trottg cua truc tqa dQ. L,iy
C:
9,8
mis2. Phrong lrinh
dao
d6ng ctia
con ldc ld;
r:
'6;
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ly dQ
currg:
s
-
s6.sitr(u,rt
I
q)
c6:
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^l+=./2{
-
J
radls rn
=
l'
=l! =2crrr.
Do tai
\i
!o,z

u
0 7
thoi di6nr t:0, r,Ai o'vj
tri
cln
bfng
vd di
theo
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g:0
(ch*
ii
rp
-
-nlL
trong lruong
hop
hiinr
dao
dQng ld hdm cosin).
=
s
= 2sin(7i)
(cm)
:
2cos(7t
*
ni2)

(cm).
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/
r /
,-t t
t''
r
/'
\
''1
,4
,1/,h
r,t zn
(
rc^
f^i*
klrx
kU
/^-'h
)