A.dbng CiQn t6ng nhanh.[r]
Trang 1@-;nlo, a$oa, r,G dtntGffi;fiG;T fii';E;hiii n]m troKg moi'turitrfng co-ctridJlu'
ctlrdi l6n rhi l{c ttr c6 chidu
A.tff tri{i sang ph6i .
C tU tr6n xudng dudi
C.25N
B tir rong 6 Lu ra ngobi rr6\,rcEr . {\
D trl ngohi vlo trong Cdu Z:MQI dng diy c6 clQ tUcdm I-=0,5H ,n6ng lfc.,ng tich lu! trong dng ct6y ln l00J .Ddng rliQn qua dng ddy c5 crldng dQ :
CGu S:Mlt ddng di$n ch4y trong d0y tt6n thing clli Tai Oidm e cr{ch ddy l0cm cAm rlng tir do dbng
tlQldn 2.10-s T.Crrdng dQ ddng diQn ch4y tr€n diy td :
olgn gay ra co I
Cfru4:Trongm$tmachdiQnd0tgcfrm L=0,3'II c6ddngttiQntflng ddutil Ir=0,taddnI:=0,2A
trong khorf,ng thdi gian 0,1 phtit .Sudt diQn d0ng tU c6m trong mach c6 d6 ldn .
Cdu 5: I'{du cuimg d0 rldng diQn trong dAy trdn titng}ldn vi iltfitng kinh ddy tdng} Hn thi cfrm rfng tir tai t6m vbng ddy
A kh6ng d& B rang + tdn' C rdng 2 ldn D gi6m 2 tdn
Cdu 6: Bidu thrlc nio sau cl6y dnng dd tinh ning h/rJ ng cuQn cf,m
Cdu 7 : MQt do4n dny dni I cti ddng diQn cr]irng rl0 I clAt trong tir trddng ddu c6 c6m fng dr E hgp vdi
7 mQt g6c a .tr-qrc tir tdc l6n doan ddy bhng kh6ng khi :
A.Vu6ng g5e vdi df;y d6n mang ddng <liQn B.Vudng g6c vdi vectd cdm ritrg tir.
C Vu0ng gdc vdi rn{t phfng chfa vectcl cdrn fng til vi ddng diQn
D Song song vdi dddng srlc tit
d0 ldn [h :
A" z.tro'*G') 8.4.tr0-6(T) c" 2 10-('ffi') D.4 1o-?(T)
Cfru l0: MQt di$n tich chuydn d$ng trdn ddu dudi tdc dgng cria lgc tr-o-ren-xo.Khi vf;n tdc cda diQn rich
vh dQ ldn cfia e6rn 8ng tt ting 2 ldn thi brin kinh qu! dao cira dQn rich
,{;tIng 4 tdn ts kh6ng rldi C t6ng 2Hn D girim 2tdn
Cdu nX: MOt diQn tich 10-6C bay vdi v{n tdc lOam/s xi6n gtic 30(}so vdi ciic tludng srlc tff vho n'rdt td trddng cldu c6 d0 ldn 0,5T' EO ldn l{c Lo-ren-xcr tr{c dung l€n di€n rich li :
Trang 2C&st fi.2:lfiQr dbng di6n ch4y rrong m6r dAy ffidn i0 vbng drt'dng kinh Z$cm vdi cddng dq 10^A thl efimi 6ng tUtai t6m cdc vdng d6Y ln :
Qdw-13:r{5y chgn cum tr} dd nn6 tddqi }uong +-9
^t A.Luqmg til th6ng qua diQn tich S .
g.fdc 00 Uidn thi€n tU th6ng 1
C Sut't tliQn r|One cf,m fng ,
D .DO thay tldi dr th6ng .
C&u l4:MQr vdng ddy trbn bdn kinh 20cm .Crrdng clQ clirng cliQn trong ddy ln 0,2A.Cdm fing tiltqi tarn
cria vbng diy c6 gi6 tri
o u"ri.io 1D " - '
B 12,56.10 ''(r) " c 6,28.10-'(T) D' t2,56'toag) C&u lS:MQr khung dfiy <tign tich 5cm2 gdm 50v0ng day Eqt khung dly trong tir tnrdng d€u c6 cdm
,:r* rU e oa quu! khung diy theo mgi hrrdng TUrh6ng qua khung ddy c5 gi6 tri cqrc dqi la 5.10'3wb
.Cim rlng tU ts c6 girf, tri li :
A.0,2T8.0,02TC.2,5TD'Mqtgi6trikhric
C6w I6:MQr khung d6y d6n cd 100 vt)ng .DiQn tich gitli h4n bdi m6i vdng diy li 100cmz Khung d4t
,*ng ,U tnt'dng ttdu c6c6c rtrtdng cim rfng til vrr6ng gdc vtli mflt phf,ng crla khung , d0 ltln c8a cim #ng tii B =0"2T.Tt th6ng qua khung c6 gi6 tr! : *
'iai'ii:2p7rOt
dng <iiy dii 20cm c6 I200 vdng diy Tt tr'./ilng trong lbng dng dty c6 d'0 l6n 7,5.10'3T' Cudng riQ dbng di$n chay trong 6ng d6y lir :
Cdw IB:F{ai d6y dfin thfrng dii ,song song c6ch nhad lOcrn Ddng diOn chAy qua hai ddy ngrt'Qc chi6u
,e&ng eddmg dQ XCA.Ctlm fng tff r4i didm c;{ch ddu ha! cIfiy doan 5crrye cd d0 ndn
A 2 L 0-sT' 8.4 1O-sT C.8 TL}-sT D O T
*/di v6n rdc tr 0sm/s vuOng gdc vdi dudng sfe [S trMdmg
Cfrelf:lvn$t eliQsr tfeh ed d0 ldn 10 7-uC bay
ddu c6 d0ldn cdm rrng fibhng lT' 80 ldn h/c tr-o-ren -xd tdc dgng i6n di€n tich ih
W:Phdt bidu slaro sau day [h safi?
SuA't diQn clQng cdm frng c6 gid tri ldn khi
A.dbng CiQn t6ng nhanh .
B.dbng diqn gi6m nhanh .
C.dbng diQn c6 gid tr[ ldn .
D.dbng dien bidn thien nh.anh
cee821 Fh6t bidu nlio sau ddy ld kta6ffi8 dfing
TU tnrdng ddu tra $r mudng c6 .
A.ede d$dng sffc song song vh cdch ddu nhau
B.cim ufng tif tai mgi ndi ddu bhng nhau
W: I-/tOt dng dfly thf,ng dAi cd d0 tU ciin :
d*g d6y NAng ldqng fi tlftlrrg tAp trung trong
Q.eeGL: lMQt day dfin rtrtng c6 ddng diQn I clat
tff ti{c dqng trCIn df,y cd :
D.0,UZnnqT
f'\ts.'
,7
C.lgc rtl tiic ciUng l6n ci{c dbng diQn nhd nhau 6 .
D.cdc dac didm PhUdng i{n A va ts
f= l00nrH .Cho clbrig kh6ng ddi edting dQ n=zA chBy Eua
t\ n2 t4 l\
lbng 6ng dfiY Ia :
D.2J
rr:ong v*ng khong gian ed tif tnJdng d0u nhd hlnh l'6 'Lqs"e
Trang 3B.Ptufting ngang trddng sang phdi .
C Phtfdng ilr&ng dfrng hddng l6n .
D,Phudmg th8ng dfng hddng xudng
C6u 24 M0t dng d6y c6 dQ tqr cfrm 0,4H ,trong khoing thdi gian 0,04s suatdien dQng tq, cfrm xuf,'t hiQn
trong dng dny h 50V OO Uidn thi6n cutlng dQ ddng trong khoing thdi gian d6 li :
C&u ZS:Trmphrit tiidu'sai vd cfrm rlng tu cria tir trtrdng cto dbng iliQn ch4y trong vdng diy troi gdy ra tqi tf;m:
A FhU thu$c viro vi tri didm m x6[ .
C PhU thuQc vlo bi{n kinh vbng dAY
mQt nam chflm tfrfrng MN c6 chi6u nhrl hinh vE KCt lufln nio drldi ddy dfng ?
ts M lI crJc bdc .
D.Khdng rhd kdt lu6n drrqc
&,.
C&w ZZ:MQ1 ddng diQn th6ng dii vd h4n [ =l0A trong khdng khi .Cdm rlng til do n6 g0y ra t4i didrn M
cr{ch ctbng di@n 5cm bEng
qua hinh vu6ng oo uhng ro-6wb Gdc hdp bdi vecto cim rlng tir vdi phdp ruydn cria hintr vudng dd lh:
C6.ss Zg:Tai r6m cria dbng diQn tron cddng dO 5A .Cf,m fng tff do dutlc le 31,4.10-oT' 'Budng kinh e &a
ddng diQn d6 lh :
A, l0cm E 20em C" 22crn D" 26cm
.A
s"+
B FhU thuQc vio cddng d0 dbng diQn .
D DO ldn lu6n bhng 2n.10-'+ ndu d4t ffong khong khf
fr'
C-&s,e 26: Dtfdng sffc eua
A, N [h c{c nam
C, N [e, cdc bdc
A.ci<0
C FIa't ehuydn dQng vu0nll goc vdi E
D, C6 tra trtldng hgP trCIn.
r+Er
C&w30; Cho mQt hat mang cliQn tfch q chuydndn dQng trong tif trdilng d0uCIu B T'rddng hgp tliro sau e1fiY
q{Sfgt
Y\.7.o \,,41\-, r5!\ E r.6e .s.*"E) -'Y - l
hAt sd kk6wg e hiu t6c dqng ciia l{c Lt>-ren-xd 'J
B,