[r]
(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 rrtrt]ngr'
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 vd 16 trdng ddu chuydn ctQng ngugc chi6u diQn tnrdng
EEl".tr,rn rr/ 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$ng cria cdc hqt tii cli€n hdu nhrr kh6ng thay ddi nhiQt dQ tlng CAu 3: Ch<.rn phdt bidu dring o
@Cf,ft b{n ct6n loai n nhi6m diQn'Am sdh4t Clecrron ril clo nhi6u hcrn ciic: 16 trdng
re7Khi nhiQt cing cao rhi chdi br{n d5n nhidm diQn cdng ltln
.'
PKhi m6c phdn cdc ngtrQc vdo l<lp tidrtp xric p-n thi c1i6n trrfdng ngoli r-'ri r:ir: rlrrr:g
tlng f:rrilng srr khudch tiin crta c6,.c hat cO b6n l
PDdng cliQn thu{n ri ddng khudch t6n cria c6c h4t ccl b6n;
Ced 4.:Ph/atbidu nio sau d6y li khOng dring?
FCa* fng til li clai lu-o ng d{c tnrng cho rr} tnrdng vd mdt t6c dgng lrrc.
F UU ltln cfia c6m rfng tfi drrqc xdc ttinh theo c6ng thfic B =nk phs thu6c vio
ctrdng dQ dOng rtiQn I vi chi6u dii doan d6y d6n ddt tr} trudng
FrO t ltln cria cim r?ng til dugc xr{c dinh theo c6ng rhfc B " = - _.l kh6ng phu thuQc
I.l.rrro
vio crrdng dQ ddng diQn I vi chi6u dii do4n d6y ddn d{t trong tir rrldng
pCa* rfng ril Ii dai lrrgng vecrd Ceu 5! phdt bidu nio sau aay la kh6ng dring?
Yl-Vc til tiic dung I6n mQt doan d6y d6n mang ddng rliQn clar rrong til trurlng ddu ri l0 thudn vdi crrdng dQ ddng diQn rrong do4n d6y
,Ftnt til.tdc dung l6n mOt doan d6y d5n mang ddng clign dat rrong tu tnlrlng ddu ti
l0 thd{n vdi chi6u dii ctia doan d6y "
5
(2)trdtfig ddu ti
it'tL
triftJng ddu ti
Wo mQt doln d6y d6n mang ddng di€n I d{t song song vdi drrdng sfc ddng cfign ngugc chi6u vdi'chi6u cfia drldng srl'c tif
+'q*&h
,[)l-ryc til lu6n bXhg khdng tdng crrdng dQ ddng diQn
'pL,r til Ungkhi tlng cudng
dQ ddng tliQn
/
'i
tU, chidu ctia
i
'\gflyc
ttr girim tdng cudng <10 ddng diQn
r -?- ' o -e -i c,
Pl-qrc tir adi ctridu ta Adi chidu ddng ctiQn
C6u 7: MQt do4n diy d6n dni 5(cm) d{t trong til tnldng d6uvi vu6ng g6c v(li vecttl c{m
ri'ng til Dbng diEn chAy qua ddy c6 crrdng d0 0,75 (A) LUc tr) tr{c dUng I€n rloan df,y d6 li
3.1fe(N) Cdm rfng tr} ctia til trtfdng cl6 c6 ttO ldn li:
YU.4 (T) F3,o (T)
#
r$r).g (T) o Fpl.Z (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 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 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 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 (crn) c6 ddng cli€n I = 5 (A) d{t trong til trut'rng
ddu c(r c6m ri'ng tr) B = 0,5 (T) LUc tir tdc dgng l6n clo4n d6y c6 d0 ldn F = '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 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
(3)Y0Dtrdns srlc tr} ciia tr) trrrilng gdy bdi ddng cli€n thSng dai la nhfrng dti,)ng thfrng /"
song song vr3i ddng diQn l
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 br3i ddng diQn thLngafi ra nhtrng <trrirng thrtng
song Jong ciich ddu
p:Orrcfng srlc tilctia til tntdng gdy 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:
=lo4"N'
-ddn thSng dai C6m rfng tr)
Wzz cm I
W,za cm WBM Cdu 13: Dr)ng diQn I = 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') Dudng kinh ctia ddng diQn dd la \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
p;na vd N cl6u nim tr€n mQt drrdng srlc rtt
p Cdm rlng tr) t4i M vi N c6 chi6u ngrtQc
/'
pt CAm tlng rr} t4i M vi N c6 dO Itln bing nhau
CAu 16: M6t ddng diOn c6'cudng d0 I = (A) chay mQt d6y d6n th8ng, dai Crim rlng
tr} rlo rlt)ng rliQn niy gdy ra tai didm M c6 rl0 ldn B = 4.to'' (r) pidm M ciich el6y m6r
khodng
ps (cm)
tar diim M c'Ach
)Q 25 (cm)
(4)Cflu L7: MOt dbng diEn
fng til clo dr)ng diQn edy
\oro (A)
/
E zo (A)
I
C6u I tt: MQt 6'ng d6y dei 50 (cm), Cem fng ttr b€n drrg ddy c6 d0
chay ddy cl6n th8ng, dei Tai 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 = 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 e|y 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 = 1,1 (CI), l6p sdn cdch diQn
^t h {, r,V { ^ .( r r \ I
Den ngoar rat mong Dirng sgi rIAy niy dd qudn m$t dng ddy ; i. - - *i. -E -.n \€
' : , Lrl* V*q .tfiu e,.il Adt, *lvo*'-cho ddng cliQn chay qua dng clay thi cim frng tir bdn dng Odyoc6 d0 ldn B =6,28.t0-'1f; 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 = 6 c6 crrdng d0 (A) Cim fng til t4i t6m vdng trdn ddng
,3.10-sT ,$,9'ro-5r
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 / ddng diQn song song cing chidu hft nhau, ngrrQc chidu ddy
;
V gri ddng cliQn ngtfsc chidu hrit nhau, cing chi6u ddy
/
'p,Lgc ttlctng tdc gitta hai dbng di€n c6 clQ ldn ti l€ thu6n v6i crrdng c10 cria hai ddng
(Iren
(5),{
'r, I
,
.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 bi dft cho gia tdc tnrdng g = 9,g (rnls') A I = 0,36 (A) va c6 chidu til M ddn N
B I = 0,36 (A) va c6 chidu til N ddn M C I - A,52 (A) 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 = 10 (cm), gdm 50 vbng d6y chay qua, d4t tron! kh6ng D0ldn cim tfng tr) t4i tdm khung d6y ld
pa = z.To-3 (T) P B = 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 c6 vectd cim fng tr] B, ,
ctdng <lien thf hai gdy c6 vectd c6m rfng til 4, hai vectd q ,a B, c6 hrrtlng vuOng g6c
v(li 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 Goc hgp bdi
thfc
sttanfr =
B,_ B2
F'
Br
psin(r = Ptancr
-Cdlo27: Hai ddy dhn thing dli vO h4n d4t song song ci{ch 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 phia sau m{r ph8r,g hinh ve
F vudng g6c vdi mar ph8ng hinh v€ va hudng
tr) phia sau phia rrttdc mAr phSng hinh v6 didm
ra c6
VCCId
M do ddng diQn thf'nhfl't gdy c6 vectd cdm fng ttl S, , do
vectd cdmitng til Br, hai vectd E ,e 4.6 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
(6){rf,
pra,B,C sai
Ce uig: Chgn phr{t bidu sai
tsfai cdc didm nhm
dQ/'ISa bXng
ttng til c6 d0 t1ln bhng nhdu
F'tu i iacdidm nhm
'd0
ldn bhng nhau :
tr Tai cdc didm nhm
'\:._
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 dng ddy mang dd.ng tti-Qnrc6m fng til c6 d0 ltln bBng
R
DIEM
4
tY-CAu 30: C6 hai "d6y d6n thEng dii, song song mang hai rlo g diQn cing chi6u Ndu crrrlng dQ ddng 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,