[r]
(1)1 A B C p,
2 ."K E C rg
3 >(. B C p
4 A B g- D
5 A. * C X
6 ,& B @ D
7 A B K &
8 A B C; x
9 h B I D
10 ,A B >C* D
Oiimem tra 45 phrit-m6n v$t li- 11 CB (2014-2015)
Cac em eann a6u x vdo cht trong t16p rin dung nh6t ctra bang tri ldi sau /f
D6 1:
Cau l: Hdy chgn c6u dring DO lon crla llrc <IiQn tuong tdc giirahai iliQ4 tich di6m kh6ng khi :
N TilQ thu6n vdi binh phucrng khoang c6ch gifa hai diQn tich
B/ Ti le thu6n voi tich khOi tuqng ctra hai diQn tich
C/ Ti lq nghich v6i khoAng c6ch gitahai ttiqn tich
DlTilQ nglqich vd binh piucmg khoang c6ch gitahai dion tich
Ca" Zi-Cau nio li sai ktri giai thich vd Uan ch6t sW nhi6m diQn cira circv$t
e,, Vat e ti6p xtic voi vft B it6 nhi6m diQn , €lectron t.u truy&r qua tti6m titip xirc lim cho A trd thanh nhi6m dien D6 li nhi6m diQn ti6P xric
ei Khi v4t nhi$m dipn duong thi c6c diQn tich duong tir v$t ktr6c chuy6n t6i , vOt nhiSm ttiQn 6m thi c6c diQn tich 6m tir vflt kh6c d6 chuy6n tdi vflt
C/ 6lectron truydn;ffi; J*rnirrp x{rc gifia hai vflt khi hai v4t cq x6t voi nhau lim cho hai v0t d6 nhi6m diQn , Ao u ntriEm eien ao ce x6t
D/ VAt kim loei A d ;A'n v4t B da nhi6m diQn , €lectron tu do ho6c bi hrit vc phan v4t A gan B hoac bi day v0
ph6n v{t A xa B , d6 le nhi6m <tiqn huong img
Cflu 3: Chgn c6u p!r6t bi6u sai ve dulng sirc diQntrudmg:
N C,6c ducmg srlc tinh <tiQn ld c6c itudrng cong k*r6ng kh6p kfn'
B/ Eulng stl eien 11 duong md hucmg tiep tuydn tpi b6t k! di6m ndo tr6n dulng cfing trung v6i hudng cira vecto diQn truong & di6m d6
Cle1cfluimg srtc diQn xu6t phat tir dien tich ducrng vd tin cirng c6c diQn tich 6m
Dl Cbc<tudng sric tinh ttiQn ld,cdc duong cong kh6p kin
-o -C0u 4: Cdu nio sai vA diQn trudng
A/ Trong hQ SI <lon vi cucmg ttQ iliQn trudng li V/m
B/ Tinh ch6t co ban cria diQn trulng li tac dUng lUc ttign lOn diQn tich kh6c dat n6 C/ Cuong i10 diQn trudng li mQt dei lugng vec to , f- = q' F
Di Cudng d0 ttiQn trulng cua mot ttiQn tich sfi6m Q chdn kh6ng ,B= k4
cau 5:D4i lugng nio duoi d6y kh6ng lian quan d6n cucrng d0 ttiQn trulng cria m6J diQn tich di6m Q tai mot
11 A B @, s
1,2 & B C D
.r3 A
w, C D
1,4 A B a b
15 A g I D
L6 A B C (
l7 .R B @ D
18 K B C D
L9 A ts fr D
2A A x @ D
sst >( B C: D
22 A g_ C D
23 X-r B C D
24 w B C )K.
25 A ffi, C D
26 >f B C @
27 A B C X
28 A ,4 Fl-, @
29 >"{ B C D
30 d B K @
(2)A/ Di0ntich di6m Q.
C/ I(hoang c6ch r tt Q dCn M'
B/ DiQn tich tht q,ilAt,l, *.
D/ h6ng sO di$n m$i e cila m$i tnr$rng
FI -?a
"fl ' -Ft
<
Cf,u 6: Chqn ctu thing !
-Th6 mqt electon UrJri'g'uao tOC Uan dAu rong mOi drgn truong b6t ki'' Electron d6 sE
#:il}ll$3ffffiffiT}l*"ffi'ilf,Huu**::eer,ffi tl,ap d
Cl
"n*e" AO.rg rt, Ai6*.0 A6n
trr6 th6p 1€n di6m c6 diQnth6 cao
,l A** ycnviHrOng c6.vfn t6c barr ddu gA" *
"a;r,ie,
aiei *116 u*, = 3 v Hoi dang thfc naolyii dav cnf ,$'i*:yu ' "- * '.-A/Vr,a= 3 V B/VN:- 3 V C/VN-Vr"'I= 3 V D/VN-Vrvr: - V
cfiu g:Gpi Q, c vi U ld diQn tich , diQn dung vi hiQu iti€.n trr6 giua hai beh ctra mQt
tu dign Ph6t bieu nao duoi
d6ylnilring? t
. A/Ctil$thu0nvoiQ B/Ctil9nghlchvoiU I
c/ c phu thuQc vio Q u D/ C ktrong php thuQc vio Q vi u
Cf,u 9: Hai di.n tichlr6*; = 3.10{C ,a 4r': -r-I;;;'d6icach nhau cm mOt diQn mdi
d6ng ch6t c6
l:2.Lryctuong trlc gita hai ttiQn tich li :
A/45N B/6oN c/goN' D/3oN
Cfiu 10: Dar luqng nio dflc trtmg cho kh6 n6rrg tich diQn cria mOt.T dlr,, ^
A/ DiQn tich cria rtiQn B/ Hi-cu diQn thc giita hai bdn cua tu itien'
c/ Di-6n dung cria 4r itiQn D/ cuirng itO <lipn truorng trr diQn'
Ciu 11: Chqn cdu ph6t bi€u sai vO tU diQn"
e,,6i-f* dung cua tu Aieo H dai lugng d{t mmg cho khi ntuig tich diQn cria diQn' '
B/ G1fr4 hai bqg=1Ql A!0n-rJ@-q9 tich diQn ld diQn truong dOu'
- C/ 6rc" ,i;r, r.fr
C, areriilton-taienrlci$ftfra hai: 6en tu6i6.n
. o
D/ EiQndungctiatPdiQnchob0i C: i
c6u 12: Su6t diQn dQng cta ngu6n diQn li dai luqng duo c bing
A/thunng s6 gita c6ng ctra ryc 14 ai"n
"t"ra" dienictr q duong tong ngu6n tir
cuc 6m diSn cuc duong v6i d0
lcm cua diQn tich d6
B/ thuong sb gita iu"ta dich chry€n dien tich q duong ffong ngudn tt cpc 6m d6n cyc ducrng voi
d0 l6n cua
[,*##1, ,ruu c6ng cua tpc 1.4 dlch chuy6n diQn tich q ducrng tong ngutin tir cuc duong d6n
cvc 0m v6i t10
lon cua diQntich d6 :
D/ thuong s6 gita c6ng vd r1rc 14 dich ch-uy6n diQn tich q ducrng ngu6n tir cgc 6m d6n cgc ducrng
c6u 13:sqi U la nie"iie" *rrA gitailai aAu mot doan mach cidren o" l; I 3 *t'* <10 ddne diQn ch4v qua
doan m4ch d6 Nhiet fugng tbarao doan m4ch niy trong thei gian t c6 th6 tirih bEng c6ng
thrlc nio ?
ciu t4: Bisuthirc rrao i#eg.y bi6u di6n mot dei luqng cd tlsn vi ti vOn ?( vci q Ia 'ti$n
tich
' E l& ouorng dQ rtign tnr&ng , u li;a;;il;B-, i ,a m,rn *me" uq*u di eria q t6n mst
dudrns s{rq )
A/ qEd B/ qU C/ qE' }/ Ed'
Khi n6i vC cudrng itQ diQn truong tai mQt di6m diQn t{ch AeLa gdy rac6ch n6
mOJ khoang r s€:
al ri fe voi d0 tL eie" tich Q Bt ri lQ nghlch v6i r
; ilr;.rb"e" e > 0 D/ C6 phucrng n6i q vi di6m d6' '
-cau 16: c.ng t or]el iu i** cp d6m dien ntrng crra gia ainh t or,g mOt thane DiQn ndng ghi trcn
c6!g to diQn
(3);H
47 Jur/gi6y(J/s) B/ o6t(w) c/ Kw/h (ki-16-o6t trcn gid) Dl Kwh ( 1;16-q{$gi} )
c-a"liioiO, a'org diQn kh6ng d6i, sau phrit c6 mQt dign luqng 24 C c}rwicn qua ti6t di-€n thang Cudmg ttQ ddng tliQn tt6ld:
Nr2A Bl *A cl 0,2A D/48A
Ciu 1g: MQt ngu6n diQn c6 su6t diQn dQng 200mV D0 chuy6n qua mQt dien luqn$toc qua ngu6n thi luc la phei sinh mQt cdng li:
N 2J BI O,O5J
CAu 19: cho m4ch diQn kin nhu hinh vC : hai pin gi6ng nhau, m6i pin c6 suSt AOn dOng vi ttiQn trd trong ld8= 1,5 V ; r : I '[I ' Hai tOng <ten gr6ng ctrng c6 s6 ghi trOn ddn li : V - 0,75 W ( cho rlng <1i9n h& ct.rcfucttdn kh6ng d6i theo nhiet d0 )'
C6c ddn c6 sr{ng binh thuong kh6ng ? " \r
A/ Q - 3,6 106 J ; I - 14,00 A
C/Q -3,6.106 J;I:4,55A
CI zAJ Dl 2000J
B/Q-36kJ;I:4,55A i
D/Q-36kJ;I:14,00A Rr
N cithai <16u sang binh thudrng vi hiQu tlien th6 cria ddnbang vT tong su6t diQn d$ng
gl
"a hui ddu sren!
yiiu hon binh thucrng vi higu diQn th6 d hai <tAu <ldn nh6 hiQu <liQn th6 dinh mrlc cria ddn
Cl chhai ddu *tog ir*, mtc binh thudm; vi hiQu diQn th6 hai dAu ddn lcm hcrn hiQudi€n the ttinh mrlc cira ddn'
Dl chhai ddn d6u kh6ng hopt dQng du-o c vi *8i oen dOu c6 hiQu diQn trrti ton hon su6t diQn dQng ctra m6i nguon Cao ZO, *Ot b6p rtiQn c6 glri (220V - 1000 W) Tinh nhiQt luqng md b6p tbaratrong mQt gio vi cudrng dQ ddng diQn qua bCp khi bep ho4t dQng binh thudng
Rz Cflu 2L: cho do?n m?ch nhu hinh v€ :
Rr : 40 f} I Rz : 20 f} ; R3 - 60 f) ; ddng diOn I - 2 A,
Tinh c6ng su6t ti6u thU cira toirn m?ch dien ndy
Nr20w B/ 60W cl 30w Dl 240W R3
cau2z:M0t ngu6n diqn co diQn tro rong 0,1 (o) <tugc mic voi <tiQn trO 4,8 (o) thanh mpch kin Khi d6 hieu AiO" tfragitutrui cgc ctra ngu6n diQn li 12 (V) SuAt dien dQng cira ngu6n ttiQn li:
N 8: L2,0A (V) Cl 8:14,50(V). Dl 8:11,75 (V).
Cau23:Haidipntichdi6mql:4.10'8C,qr:4.10-8Cd4t&AvdBc6chnhau6cm.Cudmg<l0ttiOntru&ng& di6m O li trung di6m cria AB c6 gi6 hi:
A.0 Bl 4.10 5V/m Cl 8.10 sV/m Dl 24.10 3Vlm
ci[.24zM0t elechon ( l6n rtiQn tich vn khoi lugmg cira electron li 1,6.10- le C ve 9,1.10 -rt kg) dugc thi kh6ng v6n t5c d6u & s6t ban 6m , diQn trucrng ddu gitia hai ban kim lo4i ph6rrg, tich dign trai d6u' coo?'g dO diqn fficmg giria hai bi4 le 1000V/m Khoang c6ch giita hai ban le I cm.Tinh v6n t6c ctra electron khi n6
<t6n ttflp vdo ban ducrng
Alx l,g.l0 6 m/s Bl x!,9 10 Tmls Cl= 1,6.10 -'8 m/s Dl= 1,6.10
6m/s
Cflu 25; Trong m9t mach kin mi <tign tr& ngodi h 10o, dien trd li 1C) c6 ddng di-6n h 2A HiQu diQn the
nA eAu ngutin vi su6t diQn ttQng cira nguiln [d:
N UN: 10V vdff=LzY
;dFrtr
(4);
4t{rr'Q +-ar*
Cl UN -l0V vdff=zY Dl UN -2,5V vd8=0,5V
Ciu 26: MOt bO ngu6n diQn c6 10 ngudn gi6:rg mic song song, m6i ngu6n c6 su6t eien e0ne I = 6Y vit diQr tre hong ld r: 1O HEy tinh sudtdiQn dQng vd ttiQn tr& cta b0 ngudn g
N E:6Vvir:10-r o Bt E =60Y vir:10-l o
Clg-Svvir:10f} , Dl 8':60vvir=10f}
Ciu2hMOt bO ngudn diQn c6 l0 ngu6n gi5ng m6c n6i tiiip, m5i ngu6n c6 suAt diQn tl0ng I :6Y vit
u"' *u;"
;:,';,'
^:
: ;j:su,'l
aien':'
: :,;:::il r %1*14\ ( 4 u %3( 0\ 's
Lx
Cl 8:6Vvdr:10 O Dl E =60Vvdr:10 O
Cflu 28: chgn mQt d.iP 6n sai :
A/ do cudmg dQ ddng itiQn bAng ampe k6
e
B/ dC cudrng d0 ddng diQn phni mic o6i tiiSp ampe kiS voi mach
*
rpe ki5 di vao chdt duong , di ctlSt am cfu ampe k6
C/ ddng diQn qua an
D/ ddng <tiQn qua ampe k6 di vao ch5t 6m, di ch6t duong cria ampe kti
Cdu2gtM6tdientichq :2Cch4yttrmQt ttiOmMc6 diQnmeV*= 10 V ttiintli6mN c6 diQnth6 VN :4Y.
COng ctra lUc diQn ld bao nhi6u ?
A.A:!2J B.A-8J. C A :20 J D A: 10 J
_ciu 30: rnQt b6ng <tdn ghi 6 v - 6 w m6c vdo hiQu di€n thiS 7,5 v thi cudng dQ ddng diQn qua b6ng ddn niy ld :