<span class='text_page_counter'>(1)</span><div class='page_container' data-page=1>
+re)
KIEM TRA
45'BAI
I
HK
II
I :
B{n
chdi d0ng dien rrong qh
{t
bdn d6n
li
,{)t0ng
chuydn ddi cd hddng
ctia
cdcdlecrron
vi
,>Beddng chuydn ddi c6 h ddng cfia cdcdlecr
ronvi
16 trdng ,gg.gc chi6u dien <sub>rrtrt]ngr'</sub>
16 trdng cDn
g
chidu di€n rrurirng.
theo chidu cliQn trtrilng
vi
16 trdng
trdng theo chidu diQn tn/ttng
vi
Olectron
ngdqrc chi6u cliQn trufdng.
plodng
chuydn
ddi
c6 hudng
ctia
c6c 16
/
nguQc chidu diQn trdr)ng.
Ce u 2: Chon c6u 'trrt lt)i
dfing
,,u
W!Elecuon
rd do vd 16 trdng ddu chuydn ctQng ngugc chi6u diQn tnrdng. .
EEl".tr,rn
rr/ do
vi
16 trdng ddu mang diQn tich 6m.
,&*a,
cIQ cdc h4t
tii
diQn phg thu6c ra't nhi6u
vio
cdc y€u td b6n ngodi nhu nhier dO,
t1p dtdt, mrfc cI6 chidu siing.
/OoO
linh tl$ng cria cdc hqt
tii
cli€n hdu nhrr kh6ng thay ddi khi nhiQt dQ
tlng
CAu 3: Ch<.rn phdt bidu
dring
o
@Cf,ft
b{n ct6n loai n nhi6m diQn'Am do sdh4t Clecrron ril clo nhi6u hcrn ciic: 16 trdng.
re7Khi
nhiQt do
cing
cao rhi chdi br{n d5n nhidm diQn cdng ltln
.'
PKhi
m6c phdn cdc ngtrQc vdo l<lp tidrtp xric p-n thi c1i6n trrfdng
ngoli
r-'ri <sub>r:ir: </sub><sub>rlrrr:g</sub>
tlng
f:rrilng srr khudch
tiin
crta c6,.c hat cO
b6n.
l
PDdng
cliQn thu{n
ri
ddng khudch t6n cria c6c h4t ccl b6n;
Ced 4.:Ph/atbidu
<sub>nio </sub>
sau d6y
li
khOng dring?
FCa*
fng
til
li
clai lu-o. ng d{c tnrng cho rr} tnrdng vd mdt <sub>t6c </sub><sub>dgng </sub><sub>lrrc.</sub>
F
UU ltln cfia c6m rfng
tfi
drrqc xdc ttinh theo c6ng thfic B
=nk
phs thu6c
vio
ctrdng dQ dOng rtiQn I
vi
chi6u
dii
doan d6y d6n ddt trong
tr}
trudng.
FrO
t
ltln cria
cim
r?ng
til
dugc xr{c dinh theo c6ng
rhfc
B
<sub>" </sub>
<sub>= </sub>
-
_.l.
kh6ng phu thuQc
I.l.rrro
vio
crrdng dQ ddng diQn I
vi
chi6u
dii
do4n d6y ddn
d{t
trong
tir
rrldng
pCa*
rfng ril
Ii
dai lrrgng vecrd.
Ceu 5! phdt bidu
nio
sau <sub>aay la kh6ng </sub><sub>dring?</sub>
Yl-Vc
til
tiic dung I6n mQt doan d6y d6n mang ddng rliQn clar rrong
til
trurlng ddu ri
l0 thudn vdi crrdng dQ ddng diQn rrong do4n d6y.
,Ftnt
til.tdc dung l6n mOt doan d6y d5n mang ddng clign dat rrong
tu
tnlrlng ddu
ti
l0 thd{n vdi chi6u
dii
ctia doan d6y. "
5
</div>
<span class='text_page_counter'>(2)</span><div class='page_container' data-page=2>
trdtfig
ddu ti
it'tL
triftJng ddu
ti
Wo
mQt
doln
d6y d6n mang ddng di€n
I
d{t
song song
vdi
drrdng
sfc
ddng cfign ngugc chi6u vdi'chi6u cfia drldng srl'c tif.
+'q*&h
,[)l-ryc
til
lu6n bXhg khdng khi tdng crrdng dQ ddng diQn.
'pL,r.
<sub>til </sub>
<sub>Ungkhi </sub>
<sub>tlng </sub>
<sub>cudng </sub>
dQ ddng tliQn.
/
'i
tU, chidu ctia
i
'\gflyc
ttr girim khi tdng cudng <10 ddng diQn.
r -?- --'-- ----o ---e -i ----c,
Pl-qrc
tir adi ctridu khi ta Adi chidu ddng ctiQn.
C6u
7:.
MQt do4n
diy
d6n dni 5(cm)
d{t
trong
til
tnldng
d6uvi
vu6ng g6c
v(li
vecttl c{m
ri'ng
til.
Dbng diEn chAy qua ddy c6 crrdng d0 0,75
(A).
LUc tr) tr{c dUng I€n rloan df,y d6
li
3.1fe(N).
Cdm rfng tr} ctia
til
trtfdng cl6 c6 ttO ldn
li:
YU.4
(T).
F3,o
(T).
#
r$r).g
<sub>(T). </sub>
o
<sub>Fpl.Z </sub>
(T).
l'/
Ceu 8:
Phdt
bidu
nio
sau ddy le khOng
ddn*
$f,-rfc
tir tiic dqng l€n mQt do4n
dty
d6n mang dbng diQn dat trong
til
t-lq thu{n vdi g6c hqlp bdi do4n ddy
vi
drrdng srfc tU.
X
Lr,rc
til
tric dgng 16n mQt doan ddy d6n mang ddng cli€n cl+t
tron! tif
l0 thufld
vtli
cdm rlng
tr}
cl{t trong doqn ddy.
C0u 6: Phr{t bidu
nio
sau cl6y ln drfing
?
S
\r,
IvIOt do4n ctdy cl6n th8ng mang dbng dien
I d{t
)q},
I{c
tif tiic clqng l€n rnei phdn ctia do4n dAy.
trong
tr}
trdc'Ing ddu thi
E
tU. tir chi t6c dung
vio
trung didm cria rlo4n dAy
I
PfU.
til
chi t6c dgng khi do4n ddy kh6ng soi'rg song vdi drrdng sr?c til.
E
tuc tU tdc dqng l€n do4n ddy c6 Oidm dat la trung aidm cria do4n d6y.
/
C6u'9:
MQt doan ddy d6n thfng
MN
dei 6 (crn) c6 ddng cli€n
I
<sub>= </sub>5
(A)
d{t
trong
til
trut'rng
ddu c(r c6m ri'ng tr)
B
<sub>= </sub>
0,5 (T). LUc tir tdc dgng
l6n
clo4n d6y c6 d0 ldn F
<sub>= </sub>
'7
,5.10'2 (N).
G(rc cr hrlp
bili
ddy
MN
vi
dddng
cim
r?ng
til
li
Cu
hinh
X
0,s".
F.t
"
F.uo".
Frn"
10: MQt ddy d5n
thfirg
c6 ddng tliQn dat trong
vthg
khdng gian c6
tr)
tnldng ddu nhu
vC. LUc
til
tdc dUng l6n ddy c6
)6}
phtrcrng ngang hudng sang
ttdi
F
phudng
rgulg
litldng sang Phei
p
phddng *l+Ing
dfng
hddng l6n.
le
XD phddngthhng clfng hrrdng xudng.
/
11: Phrit bidu
nio
sau d6y la df ng ?
;1
</div>
<span class='text_page_counter'>(3)</span><div class='page_container' data-page=3>
Y0Dtrdns srlc tr} ciia
tr)
trrrilng gdy ra bdi ddng cli€n thSng dai la nhfrng dti,)ng thfrng
/"
song song vr3i ddng
diQn.
<sub>l</sub>
B?Errdns sfc
til
cria
til
trddng g6'y rabdi ddng di6n thEng dai Ia nhfrng cltrtrng rrirn..
pOuOng
s(rc tr) cfia
til
tnrdng gAy ra br3i ddng diQn
thLngafi
ra nhtrng <trrirng thrtng
song Jong ciich ddu nhau.
p:Orrcfng
srlc
tilctia
til
tntdng
gdy ra bdi ddng diQn th8ng dni
Ii
nhfrng duirng trirn
ddng t6m
nlm
trong
mlt
ph8ng vu6ng g6c vdi d6y d6n.
CAu 12: Hai didm
M
vi
N gdn mQt ddng cliQn thEng
dii.
Khodng c6ch
til M
ddn di>ng rliQn
l(tn gdp hai ldn khoing cdch
tr)
N ddn gdng diQn. D0 l6n cfia
cim
rfng
ril
t4i
M
vi
N
li
Bp1
vA Bp thi
F.'Brvl = 28ru.
W*=48ru.
Bn=lur
Ez.to-o(T).
tr
4.lo-7 (T).
trdn, cddng
,JO
5
(A)
cfrrn itng rir dr:
=lo
<sub>4"N' </sub>
-ddn thSng dai. C6m rfng tr)
Wzz
cm
I
W,za
cm
WBM
Cdu 13: . Dr)ng diQn
I
<sub>= </sub>
I
(A)
chay rrong ddy
d6y d6n
l0
(crn) c6 d0 ldn
Ia
ii,
F)2.t0-r{{T)
pr
4.10-6 (T)
Cf,u 14: Tai t6m cfia mQt cldng dign
(l').
<sub>Dudng kinh ctia </sub><sub>ddng diQn </sub><sub>dd </sub><sub>la</sub>
\Ap
l0
c:m
/
/E2o
crn
CAu 15: MQt ddy d5n
thing
<tAi c6 ddng di€n
I
chay qua. Hai didm
M
vi
N
nlm
rrcng cDng
mQt
m{t
ph8ng chrfa ddy ddn, ddi xrlng
vdi
nhau qua ddy. t<Ct tu4n
nio
sau d6y
ln
XnOrg
ddng ?
fiCa^
f'ng
tt
tai
M
vi
N bhng nhau.
p;na
vd N cl6u
nim
tr€n mQt drrdng srlc rtt.
p
Cdm rlng tr) t4i
M
vi
N c6 chi6u ngrtQc nhau.
/'
pt
CAm tlng rr} t4i
M
vi
N c6 dO Itln
bing
nhau.
CAu
16:
M6t ddng diOn c6'cudng d0
I
<sub>= 5 </sub>(A) chay trong mQt d6y d6n th8ng, dai. Crim rlng
tr} rlo rlt)ng rliQn
niy
gdy
ra
tai
didm
M
c6 rl0
ldn
B
<sub>= </sub>
4.to''
(r).
pidm
<sub>M </sub>
<sub>ciich </sub><sub>el6y m6r</sub>
khodng
ps
(cm).
tar
diim
M
c'Ach
)Q
25 (cm).
</div>
<span class='text_page_counter'>(4)</span><div class='page_container' data-page=4>
Cflu
L7: MOt dbng diEn
fng
til
clo dr)ng diQn <sub>edy</sub>
\oro
(A).
/
E
zo (A).
I
C6u
I tt: MQt 6'ng d6y
dei
50 (cm),
Cem
fng
ttr b€n trong drrg ddy c6 d0
chay trong ddy cl6n th8ng, dei. Tai
ra c6 d0 ltln 2.10-s (T). C6 crrdng dq
didrn
A
cf ch
df,y
10 (cm) c'dru
ddng dien ch4y tr6n dAy le
, lrJp sdn cdch dien
. ""-' ,--i-..E'tt*;o','-;.r*1
".*-.i), dai ;l
ddy tr€n m6i mdt chidu dei
o (A).
I\ ,:.
crldng d0 dbng di€n chay qua
m6i
vbng dAy Ie
2
(A).
l6n B
<sub>= </sub>
25.1 0-4 (T). Sd vbng ddy cria 6'ng dAy le
be zsa.
lu
,
tsn320.
r
Cf,u
lg
MQt sq,i d4y ddng
bOn
ngoli
rdt m6ng. Dirng
F |
-\
r-
'.
a.[--cuc, V otnfl
') *' l,r\ t\
cua dng d6y Ie :
h0
5oo
/
r Eh 1125
K/
W4rg.
{
r
F J'*
,_
sgi ddy
niy
dd qudn mQt dng
d
tn
q u
6-l* L it-l'rii.dr
k.
n'6a
r379
- ':' '
dav
:
nr{ \
)o
vong
Yos
(v)
,fu. 1,4
(v)
Cf,u
2lz
MQt d6y
(cm). Ddng diQn
diQn
<sub>e|y </sub>
ra c6 d0
ddn
r{t
clng
chay tr€n ddy
Idn la
Cflu 20: MQt sQi ddy ddng c6 dudng kinh 0.8 (mm), diQn trd R
<sub>= </sub>
1,1 (CI), l6p sdn cdch diQn
^t. 7 h {, r,V { ^. .( r r \ I
Den ngoar rat mong. Dirng sgi rIAy
niy
dd qudn m$t dng
ddy
;
i.--
-
<sub>- </sub>
*i.--
<sub>-E .-.n .\€</sub>
'
:. , Lrl* V*q
<sub>.tfiu </sub>
<sub>e,.il </sub>
<sub>Adt, </sub>
<sub>*lvo*'-cho </sub>
<sub>ddng </sub><sub>cliQn </sub><sub>chay qua dng </sub><sub>clay </sub><sub>thi</sub>
cim
frng
tir
bdn trong dng Odyoc6 d0 ldn B
<sub>=6,28.t0-'1f;. </sub>
HiEu dien th6'i] hai ddu dng d6y
H
frz,s
(v)
Wt
rry)
/
thing,
3
gitra d6y dtrgc udn
thinh
vdng trdn biln kinh R <sub>= </sub>6
c6 crrdng d0 4
(A).
Cim fng til
t4i
t6m vdng trdn do ddng
,3.10-sT
<sub>,$,9'ro-5r</sub>
B5,s'10-sT
W,5.lo-sT
CAu 222 Phdt bidu
nlo
sau ddy la kh0ng dring ?
W
LUc tddng tdc gifra hai dbng di€n th8ng song
ph8n/ hai dbng diQn
vi
vu6ng g6c vdi hai ddng diQn,.
BrUai
<sub>/ </sub>
ddng diQn song song
cing
chidu
hft
nhau, ngrrQc chidu ddy nhau.
;.
V.
gri
ddng cliQn ngtfsc chidu hrit nhau,
cing
chi6u ddy nhau.
/
'p,Lgc
<sub>ttlctng </sub><sub>tdc </sub><sub>gitta </sub><sub>hai </sub><sub>dbng </sub><sub>di€n </sub>c6 clQ ldn
ti
l€
thu6n
v6i
crrdng c10 cria hai ddng
(Iren.
</div>
<span class='text_page_counter'>(5)</span><div class='page_container' data-page=5>
,{
'r, <sub>I</sub>
,
.vu6ng g(>c
vdi
thanh c6 chi6u nhr, hinh ve.
M5i
sQi chi rreo rhanh c<i thd chiu dutrc luc k6o
tdi da Ie 0,04 (N).'Ddng diQn chay qua rhanh MN c6 cudng d6 nh6 nhe't la bao nhieu rhi mQr
trong hai sQi chi treo thanh bi
dft.
cho gia tdc trong tnrdng <sub>g = </sub>9,g (rnls')
A.
I
<sub>= 0,36 </sub>(A) va c6 chidu til M ddn N
B.
I
<sub>= 0,36 </sub>(A) va c6 chidu til N ddn M
C.
I
<sub>- </sub>
A,52 (A) vn c6 chi6u til M ddn N
D. I*= 0,52 (A) va cb chidu
fi
N ddn M
Cdra 24: MQt khun
g
d6'y trdn bi{n kinh R
<sub>= </sub>
10 (cm), gdm 50 vbng d6y
chay qua, d4t
tron!
kh6ng khi.
D0ldn cim
tfng tr) t4i tdm khung d6y ld
pa
<sub>= </sub>z.To-3 (T).
<sub>P </sub>
B
<sub>= </sub>
1,256. 1o-4 (T)
W=3,r4.ttt-3(r).
En
=6,zl.to-'(r)
CAu 25: TU tnfdng tai clidm
M
do ddng AiC,Jtn,f nh6't gdy ra c6 vectd
cim
fng tr]
B, , do
ctdng <lien
thf
hai gdy ra c6 vectd c6m rfng
til
4,
hai vectd
q
,a
B, c6 hrrtlng vuOng g6c
v(li nhau. D0 cdm
fng
tr} tdng hc.,p drlgc xr{c dinh theo c6ng
thfc
trl
B:
Br
*Br.
t
ii
,gB-Br-8,
\"/
'?
c6 crbng diQn
l0
(A)
.>
P
B:Br
-82.
Ps-C6u
26: TLY tnlrlng tAi
cl,rng ctien thrf hai gdy
v(li nhau. Goc hgp bdi
thfc.
sttanfr
=
B,_
B2
F'
Br
psin(r
<sub>=</sub>
Ptancr
-Cdlo27: Hai ddy dhn
thing
dli
vO h4n d4t song song ci{ch nhau
l0
cm rrong khong khi,
dt)ng diQn ch4y qua hai ddy c6
cing
dQ ldn 10 A,
ctng
chidu. Lgc tr) t6c clgng I€n mQt doan
dei 20 cm ctia m6i aay d6n
li
)gtu.hritF=2.10'aN
FtlU.ctdyn=2.10'oN,
:
Cdu 28: C6 hai dhy d6n
thing
dii,
song rorg
*ung hai
ddng diQn
cing
chi6u bri crrilng oQ
-blng
nhau.
M
Ii
trung aidrncria doan AB nhr, hinh vE. Chon phdt bidu dring:
Vectd
cim fng
til
tdng hgp t4i
M
Wvu6ng
g6c vdi mAr ph8ng hinh v6 va hudng
ttr phia trdtlc ra phia sau m{r ph8r,g hinh ve
F
vudng g6c vdi mar ph8ng hinh v€ va hudng
tr) phia sau ra phia rrttdc mAr phSng hinh v6
didm
ra c6
VCCId
M
do ddng diQn
thf'nhfl't
gdy ra c6 vectd cdm
fng
ttl
S, <sub>, </sub>do
vectd cdmitng
til
Br,
hai vectd
<sub>E </sub>
,e
<sub>4.6 </sub>
hrilng
vudng g,5c
cim
fing $r tdng hOp
B
vdi
vecto
q
ta
u
cluqc tfnh theo cdng
i COS Ct,
-BI
B
B2
B
I
A
+Bl
</div>
<span class='text_page_counter'>(6)</span><div class='page_container' data-page=6>
{rf,
pra,B,C
sai
Ce
uig:
Chgn phr{t bidu sai
tsfai
cdc didm nhm
dQ/'ISa bXng nhau
ttng
til
c6 d0 t1ln bhng nhdu
F'tu
i
iacdidm
nhm
'd0
ldn bhng
nhau
:
tr
Tai
cdc didm nhm
nhau
'\:._
tr6n
ctng
mQt tltrdng sfc
tt
ctia ddng clien thEng" cdm
fng
tir cti
tr6n
ctng
mQt drrdng thSng song songgdi <ldng diQn
thing,
cd,m
tr€n
ctng
mQt drrdng sfc tfi ctia ddng di€n trdn, c6m d'ng
til
a.
b6n trong dng ddy mang dd.ng tti-Qnrc6m
fng
til c6 d0 ltln bBng
R
DIEM
4
tY-CAu 30: C6 hai <sub>"d6y </sub>d6n thEng
dii,
song song mang
hai
rlo. g diQn
cing
chi6u. Ndu crrrlng
dQ ddng trong m6i aay ddu
t[ng
l6n g6'p + ldn thi lgc tr] t6c dUng l6n mQt don
vi
chi6u <lii
cua rnOi ddy se ffing
W+
ldn
/
)6
t6
tAn
bfr
ldn
Prztd,n
DEA
HQ
VA
L6P
1I
TEI{
A,
</div>
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