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N$en vd hgrp chdt crtaniken B.[r]
(1)so GxAo DUC & EAO TAO LONGA}tr
T'F{IffiTG TE{PT AAN GIUCIC
A d0 lon cria cim ring tir C khOi tuqng cta dien tich
.EF
ME KHEN/fl TRA I T'EET'E,f XX
[,6sx X a&a E{Kz Thdi gian ldm bdi: 45 phfit
(30 cdu *dc nghiQm)
ts" d0 ldrn vfln t6c cira diQn tfch
Cffi$
/
-Cffu 1: HiQn tuqng t.u cim ld hiQn tuqng cim img tliQn tu sg bi6n thi6n tu th6ng qua mpch gdy boi
.t -.-A+^ra
- - - -A;sU chuyOn ilQng cria nam chdm v6i mpch B sU bi6n thi6n cria tir trulng filei aal
-C.sU bi6n thi6n cria chfnh rodrg d6 fldngcliQn mpch D.sU chuy6n dQng cta m4ch vdi nam chdm
C6u 2: MQt ddng diQn chay mQt diy d6n trdn 100 vdng , duorng kfnh 20cm v6i cudng dQ
10A thi q6m ung ft t?i tdm cdc vdng ddy ld
"4 Ar2mT B A,Zn mT C" 20n pf B, 2n mT
Cfiu 3: Fh6t bi6u ndro dudi dfly le dfng ?
Tt trucrng bdn 16ng 6rrg d6y d5n mang ddng diQn :
/r Iudn bflng
B" ti t9 vdi chiAu dei 6ng d6y
C ti lQ vcri titlt dign 6ng dAy r D le d6ng d6u
cfiu 4: EO len cira l$c Lo-ren-xo kbafumgphu thuQc viro
C.f,q 5: Ong $dy (t) gO cung ti6t diQn vdi 6ng d6y (2) nhung chi€u dai Ong vd sO vdng ddy dcu nhi6u hcrn gdp b6n l6n Ti s6 hq s6 t.u cim cria 5ng (l) v6i dng (2) ld
A"1 8.4 c.2 D.8
91" 6: MQ_t doan ddy d5n dii 0,5m mang ddng diQn 10A , dflt vu6ng g6c mQt tu trudng d6u c6 d0 lon cim img tir 1;2T N6 chiu mQt lgc tu t6c dpng li
A.dNI B 12N c"O(bt) D 18N
Cflu 7: Tp! mQt OiCm cdch mQt d6y adn ttring ddi vO hpn mang dong diQn 5A c6 c6m rmg tu 0,4pr .N6u cucmg dQ ddng diQn dey dEn tEng th6m lsAthi cim mg r& tpi Ai6*d6 c6 gi6 tri ld
A 0,2/iT B AgpT C l,2pT D^ 1,6tr[
C6u 8: MOt diQn tichbay vdo mQt tu trudrng il6u v6i vpn t6c 2.105m/sthi chiu mQt lgc
Lo-ren-xo c6 d0 16n 10mN.N6u dign tich d6 gifinguyCnhucmg vd bay v6i vpn tOc O.tbsm/s vio thi
d0 lcrn luc Lo-ren-xo t6c dpng l6n diQn tfch ld
1 B 10 1L l2 13 T4 d"{5 16 L7 18 20
A X X >( X
B X X A X
C X K X >{ >{ }( X n-\,/
D X X X X
2t 22 23 24 25 26 27 28 29 30 Me phbng
F*
e\
kf i.rr
i
Didm
,.tli
i{!ir;,
!.'i.iig
o*S
A { Y _k
B
\.r
,X X V
C ,k k \-""
D X
(2)\ ^ a<*\T [r" J\,II].I\
A" 40mN E' 25mN A" 35mN
D" 30mN
cffu 9: cho hai day {an ia, u* nhau v}r song song v6i .Khi
c6 hai ddng diQn cups chieu
'nX 3E: Hi.t?i-t* n kh6ng tuong t6c c day nhau D htt nhau
Cfiu tro: Lgc tu t6c dgng 16n <1o4n ddy dan kh6ng phllthuQc vdo n chav kons d6v r
-i.,iia,
aJi d;;;a'"';;e ab'e 'i'i#' i:;:ffi:?i"tr# chav
t'ong ddv ddn C diQn tro ddY ddn .^
"'1-cau 11: Nr6t Ong ddy dugc 919, bing loai d6y.md tigt diQn c6 b6n kinh 0'5mm cho
c6c
vdng s6t .Iihi;t ddng aie, z6e".t iv q"u trri ao-i* * .mg ru tbng ong ddy ld
A.4trrril .f,'8l-*f
- -aJ
C' 4ffLT D' mT
CAu 12: MQt khun g d6,yadn Aien td Z{>,hinh w6ng canh 20cm nim trong tu truAng
ddu ' c6c canh vu6ng g6c vdi ducrne.:,ir.ifri cim img ,,i gi-# tAu tu 1T vd
thoi gian 0'2s thi
cffu:l3: tvtEt ong dav co rre ,a ,n c6m 20mH dang,c6 ddlq cliQn vdi
cuorng d0 54 chpy qua Trong thdi gian 0,2s ddng aie" ei#;i;&;;Aaie" a6"e tu cim cira 6ng -d6v
c6 d0 lCIn
,uo.o,,uB.10VC.0;1V :.:o,;.,
cfiu 14: Ddng diQn Fu-c khfungxuAt hiQn truong hgrp ndo
sau day ?
A.LAnhOm dao dQng tU tru%g r ., ;: Kh5t il ft"y,ft lX* uo"g tir trucrng.biOn thi6n
C Kh6i cl6ng chuy.q cl.ng tro"g tirt*i*g d.u.cit c6c duong
srlc tir
;:ift5itd;"sa; nrm tu trucrns bi6n thi6n Cfiu 1.5: Mqt k,ung ddy hinh vu6ng canh ?g"\nim todn
bQ m6t tU trucrng ddu vd'u6ng
g6c v6i c6c ducrng cim img tl* tfrti el* 0,?: ;am "i"g'* cua tu
trucrng ginm fir 0'6T vO su6t dion dong;;G; d' kh;; Aav f,ong thli gian d6 c6 d0
16n H
{ A 120mv e.2aomv- c '{'qy D' 1'2V rr C6u 16; MQt vdng da, dfln ph6rrg gi6i han diql tich S = 5cm2 d[t trong
tir tru]ng d6u c6 cim ung ru B : 0,1T ilut nn*e rOoE iay tr* thenh v6i E mQt g6c
300 'Tt thong goi qua S li : A o = tz,s.lo-s4b B'
(D =
z'sJi.0-sYb C o= 2,5J0-sWb D' o =*2'5Ji'lO-sY/b
Cfiu 17: Hai diQn tich q, = 4qvi ttiQn ttrch q2.bay cirng lyff^: ciing vfin toc
viro mQt tr)
trulng itiu .Lpc Lo-ren-xo te" d;ia G^re" ;, ve; h 2.10-N vd 5.10-8N 'EQ
ldn cua diqn tich Qz ld
A 25 ltC B 10pC
D 4pC cffu x.8: Tir trulng deu 1A ffi trulng ma c6c
?
1(Y e/1r10 ; ' - 6ch dOu nhart
A th[ng song song va cacn trsLt I C song song
CAu 19: Chgn cdu dring c6c cdu sau :
A Ddng diQn t.u c&m lu6n ngu99 chiOu vdi dbng diQn *?tl '.
B Trong hiQn rugng t.u c6m , ,rraiaien clqng "e* irr;;"G mech 1i su bii5n thi6n tu
thong cua chinh mpch it6 gdy ra
g cira hiQn tucFg tu c6m c."men tuqng cim rmg diet' * ld trucmg.hgn riell
D Ddng Aie, t.u t* 1i6n t"g chi6u
'Oi dOttg diQn
trong mpch C 2,5 PtC
dulng silc fi le chc ducrng B thdng
D thangsong song
(3)C6u 20: MQt ddy d6n mang ddng diQn dugc UO tri theo phucrng nim ngung , c6 chi6u tu
ra ngodi Ni5u ddy d5n chiu lgc tu t6c dpng 16n d6y c6 chi6u tu tr6n xu6ng du6i thi c6m img tir
A" tir trin sang phai
C, tu du6i 10n trOn
Cfiu 21; MOt 6rrg d6y co hQ sO tp cbmL, cucvng v0 trong khoing thli gian la 0, 1 (s)" Su6t khoang thli gian AO ta 1,5V.FIQ sO L la
A.0,5 (ry) E; 0,03 (F{) c.0,3 (H) D.0,05 (H)
B" ffu phai sa$g trht
D tU trOn xu6ng dudi ^ ;
,{l\\
d0 dong diQn qua 6ng96y gihm d6u {a" fu 5.A diqn dQng tp cfrm xu6t hien 6ne
Cfra?l}z Vt6t Ong d6y titit diQn 10cm2 , chidu dii 20cm vd c6 2000 6ng d6y ( kt6ng 16i , dpt trong kh6ng ) H
ft
'R''
ft
D.mQt cdng thric khfc
D di0n tich crla mach
vdng d0y ,F{e sO Lu cim cria
D 0,2r mF{
.4," 8n mI{ ' EBo 0r2mH C.0,8mH
Cf,u 23: Phdt bi6u ndro dudi dfly ld sai ? '
SuAt diQn dQng fr,i cim c6 gieffil6n,khi
A" ddng dien t6ng nhanh
c ddng diqn_c6 giiltri l6n
ts" ddng diqn gi6m nhanh D: d_dng dipn bi6n thi6n nhanh
ChuZA:MOt dien tich 10-6C bay v6i v$n t6c 105m/s xi6n g6c a00 so vlicdc iluong sric tu, vio mQt tu tnlOrrgeeu cfdQ lon 0,5T DO lorr-criatyc Lo-ren-xo titc dUng l6n ttign tich li
A.2,5mN B 25 N C.25mN D, 25J'MN
r A
^
Cffu 25: BiCu ndo sau ddy khhng dring n6i vO hq s6 t.u cd"m cta 6ng ddy ?
"A.He rq t.o c6m php thuQc ti6t aipn Ong
ts He tO t.o cim php thuQc vdo s5 vbng ddy cua 6ng p.HO rg t.o c6'm c6 tlcm vi la H ( Henry )
D.He 16 t.u c&m kh6ng php thugc vdo m6i trucrng xung quanh
C6u 26: Tir th6ng qua mQt diQn tich S kh6ng php thuQc y6u t6 nio sau <l6y ? A DiQn tich dang x6t
B NhiQt tl6 m6i trucmg
C G6c tpo boi ph6p tuyi5n vi vecto cim img tu
D.EO lcm cdm ung tu
Cdv27t Chgn cdu dting c6c cdu sau :
A Tt th6ng ludn lcm hcrn hoflc b6ng t<*r6ng B Tt thdng 1u6n 6m
C Tt thdng li dai lugng vO hucrng B Tt th6ng ld dAi luqng ve0t0
Cdu 28: C6ng thirc ndo sau ddy ttirng tinh cim rlmg cim img tu tai t6m khung ddy d6n trdn c6 ban kinh R vi cuong tlQ ddng itiQn ld I
Ciu 29: Vat fieu ndo sau ddy khAng flrC Aung ldm nam chdm ?
A N$en vd hgrp chdt crtaniken B C6-ban rl hqp ch6t cua cO-ban
c Sit vd hgrp ch6t cua sit p Nh6m vi hqrp ch6t cria nh6m Ciu 30: DO lcrn cria su6t cliQn elQng cim img mpch kin ti te v6i
a ti5c OO Ui6n thi6n tir th6ng qua mpch 6y B.dO 16n tu th6ng qua mpch C dien trO ctra m?ch