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习题练习：Physics Unit17: Electric Potential
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 作者: admin  发布日期: 2022-08-15 14:49    总分: 75分  得分: _____________

答题人: 游客未登录  开始时间: 22年08月15日 14:49  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following is not a veix9ar-;73j brby h n6gctor?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulom/ on jj5;)wgi7f wwrf-b is a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum objects are insulated fro0+jb. wdy.ut (: 8uw-bbpvqx nm their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which ob8uq.b -utw(+yxjwn:b.pd v0 bject is at a higher potential?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For a proton moving in the dire5y y+ 1 +rl pt5x-m+tx9,orrz/vlughk ction of the electric field

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For an electron moving in a direction opposite to the electric fielj,1 pl 3mgq/xv ;*8d4dgqq terd

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Several electrons are placed on a hollow conducting sphere. :97 du3omv//17 n j itcq, aczyypog0kThey

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A small charged ball is accelerated from rest to a speed v by a 500 V p z 02p66d3f0ovqpi zkmotential difference. If the potential difference is changed to 2000 V, what will the new speed ip6zv qo m6z020d3f kpof the ball be?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A surface on which all points are at the same potential is referred to5 att8 5gw1l*pvca.dg as

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A negative charge is moved from point A to point B along an equipotentialujfx),cvlgrb45 62n s surface.2 g,b 5flnjxr )v64usc

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must(c vipqiq fwr. )bqh h3w)dj98+:y+ is be

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy acquired by a partic. 6of1y3qyjl :m0 7d7u unqsuvle carrying a charge equal to that on the electron as a result of moving through a potential differenceu3 mjo6qluqynu07 yvs df.:71 of one volt is referred to as

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The electron-volt is a unit o )xoiyvn 1(xmz1q (ve,f

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresponds tgigqc,af p 0zg p-u-r+(2r qa1o

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at a distance of 2.e*57s p;ev 0 gpc:nzct0 m from a positive point charge is 100 V. What is tpc; z*:5sn0p7cteevg he absolute potential 4.0 m away from the same point charge?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at a distb+4 k hml1p9qdc 49(j kyzi bhp5xe1)nance of 2.0 m from a negative point charge is -100 V. What is the ab941k4lp cpq+ydbjb(9mn5h1 hkzix)esolute potential 4.0 m away from the same point charge?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at the exact center of a s ;*kscb qy(yb/quare is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when each of the other corners is also fil;b/kyybscq ( *led with a charge of +Q?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at the center of a square is 3.0 V when a charge od4ca 6z m2bje;f +Q is located at oa;d be zc462mjne of the square's corners. What is the absolute potential at the square's center when a second
charge of -Q is placed at one of the remaining corners?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electric dipoles always consist of two ciw (0:vtm mz +/emll8 ku.al)bharges that are

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per volt is8g:,eo zgyddb, qd m6ulw+r 36 a

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate capacitors are idj 8lv(ea: tw., mq5 u.g0qroktentical in every respect except that one has twice the plate area of the other. If the smaller capacitor has cak.v,.mj: tateol( ru 5g0w qq8pacitance C, the larger one has capacitance

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor hiza)5 5zknbjb jj74u*/c 9y enas a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the 4z* ubznaej/ bijjc)7k5ny 95 new capacitance?

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A battery charges a parallel-plate capacitor fully and then is removt oinj:uyh,(:ed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential difference between the plates as they arey:oth,(n:ji u being separated?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric field between the plates o ler0 1sirc5z3+ b*spef a given capacitor is weakened, the capacitance icr35 szsp+ lee10 r*bof that capacitor

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel-plate capacitor are ms0kc9 h8msw 9w- 0lzdvzq;p)saintained with constant voltage by a battery as they are pulled apart. During this process, the amount of ch ps-whkvc0s08md )zwl9q 9z;sarge on the plates must

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel-plate capacitor are maintained with constant voltagej o(- gmyla xi5a7ibl+))v5bd by a battery as they are pulled apart. What happens to the strength of td)xmbog7la)yv l 5 (+ i-ba5jihe electric field during this process?

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26#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State three reasons for adding a dielectric ma nqo+g m2v6kxh*-enx2terial between the plates of a capang*h6- mk2q2on+v ex xcitor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such as paper is placed between the plates of a qhk4;5g8z wg46ij f ix7;luu hcapacitor. What h6f ;whuh4xii jgu5;zq8 gkl74appens to the capacitance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric materia,masig,orkwhn ;/ ; m8olj )/dpm(w+rl such as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the pnh gmm jawr8m)/(dwo i;/;so,,r+kl electric field between the plates?

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is connerd,f6j o npz0.cted to a battery and becomes fully charged. n,r. p6zdoj0 f The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored in this capacitor has

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the capacitance of a capacito f+i +z um3rk7 e6ivxa:)fw8epr holding a constant charge causes the energy stored xf 6ew+fv7ikz3 :u)8ar i+epmin that capacitor to

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the voltage across a given capacitor ckj87ekyt0ax ug0tw fd8jhl. t: 7aw +5auses the energy stored in that capaci k gaj7 70 lwfaw8j5e8.k0utt+:yh txdtor to

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  It takes 50 J of energy to move 10 C of charge from poi8yesj.p(f b(lnt A to point B. What is the potential difference between points A .p(8b jes f(lyand B?

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The net work done in moving tn n4r o4zt3r1:tdg/nlsj ovyuj ;* 35an electron from point A, where the potential is -50 V, to point B, whrdtovu3ot3 zytn*:1 /njg; 4lrj 5s4 nere the potential is +50 V, is

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially at rest, is accelerated through an electric potential diffe;lo 7/slx -uusrence of 500 V. What is the kinetic energy of thu ;sxlluos/- 7e proton?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially at rest, is accelerated through an electrikqo.:n;hva 3,4q pspdc potential differencp3hvnp oqs4 q:;a,.dke of 500 V. What is the speed of the proton?

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Starting from rest, a proton falls through a p/h )irvfmf-2p otential difference of 1200 V. What speed doesh-/r)mf pi2v f it acquire?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much work does 9.0 V d8.st z se:cbfg mh)gqi*;8lw/ o in moving $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electron is accelerated:gv 33oteb* f6.dbh ym through a potential difference of 500 V. Whategvb.*h d:3 b tfy63mo is the velocity of the electron afterward?

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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-g object carries a charge of 20 mC. The object is accelerated from res3 9md 9do5goqit through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magn5do9di q9 gm3oitude of the potential difference?

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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-V battery maintaia,x)qo0i scu4s+dt+z p.ew x +ns the electrical potential difference between two paralle0xtdu)q+4i a ozss .xw,++c pel metal plates separated by 1.0 mm. What is the electric field between the plates?

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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A uniform electric field, with a magnitudxt:ubja 7 -xsf7it1l66bff-lde s*g :e of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0 m6s* ffl xe attb:jl6bd7xg7:f1- siu-?

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C directed toward the e,x;ng r5fzs0 xkmj0 mig / gd-6*lbycc73urv5ast. If the voltage measured relative to ground at a given point is 80 V, what is t/r ,r07dcguvb -*cnjxg5fzk0;5msg ixl my63he voltage at a point 1.0 m directly west of that point?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton moves 0.10 m along the direction of an *rhyc*g4yz 0o 3)j lhselectric field of magnitude 3.0 V/m. What is the change in kinetic energy of the prot3hz*4j h0)y ly* rsogcon?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separ4m; zw k ,73kqng8kl6qsh;kae7m4h daated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a locatioz ,l;m 4nk;4ek s a38dhhkag6qmk7wq 7n 0.10 m from the negative plate. When the electron arrives at a distance 1.50 m from the positive plate, what is the potential difference between the initial and final points?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated by 0.:i4 mht vobn8en 50s/c20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electros4i8h/5b : c e0tvmnnon arrives at a distance 0.050 m from the positive plate, how much kinetic energy does the electron gain?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, )i64n9v vs)fk /2 -oeqkpt2g/ qc nhueseparated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the eu)4 fn qinecskhkov)pe 629/gqt v2/- lectron arrives at a distance 0.050 m from the positive plate, what is the speed of the electron?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric fie.cr7fi 7nc p- zk8trq6 x:5svcld of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 18xpsv. r5z :7cc6-t7rkiq c fn.0 m directly east of the point?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C d, f92;xfc fpjgirected toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at acj,2f gpf;x9 f point 1.0 m directly south of that point?

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a Cu2+ ion drops through a 36p l nj(1mcrupotential difference of 12 V, it will acquire a kinetic energy (in the absej 31n6mpru(cl nce of friction) of

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential at ayprmqn/js;uot :n:: ,f f)5 sw distance of $5.0 \times 10^{-10} \; m$ from a nucleus of charge +50e?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two 3.00-mC charges are at the ends of a mk zp;tp(n 65 s1clbvfsy 5o3:meter stick. Find the electrical potential for the son ml: cbp55ky6z3(pfv1ts ;center of the meter stick.

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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the pyq9-tvd9rwsrk 82-c zood9 / wotential is taken to be zero at infinity, what is the electric potential at pyrdv s9rwzcw/ dt okqo2989--oint (0, 4.0 m)?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2.0-nC c(n,juh tvk 2b)harge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy 2bukvh,tj ()nof a 1.0-nC charge at point (0, 4.0 m)?

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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2.0-nC charge is at (3.0 / l,wd4i7oph lm, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC ch4 pw7oi/,ld hlarge from infinity to point (0, 4.0 m)?

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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Four charges of equal charge +q are placp xqg3 kpw- )c9)eb4sied at the corners of a rectangle of sides a and b. What i4 i)3gpwkc)q9sx -ebps the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.0 cm?

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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A square is 1.0 m on a side. Charges of +4.0 mC are pwm ;,93w rqie(sphzos2 9;ua 6ft,y cdlaced in two diagonally opposite corners. In the other two ,3am siyh9;wd(zuo2qe prsf6 ;9,ctw corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential in the square's center?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An alpha particle (c wkf(w z(m0si1chu25v harge +2e, mass $6.64 \times 10^{-27} \; kg$) moves head-on at a fixed gold nucleus (charge +79e). If the distance of closest approach is $2.0 \times 10^{-10} \; m$, what was the initial speed of the alpha particle?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much energy is necessary to place three (opcd7 +ol /ohcharges, each of 2.0 mC, at the corners of an equilateral triangle of o(/7lcpd +oh oside 2.0 cm?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What charge appears on the plates of a 2lvvbd6:)nksp 2une 8u;6v md 4.0-mF capacitor when it is charged to 100 4u d:nkv2;e s8m66v vbn)lpdu V?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has plates of area n+l8-ul(o/z* tsi vj l$0.50 \; m^{2}$ separated by a distance of 2.0 mm. What is this capacitor's capacitance?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is filled .7x(2vkt0(d u p:g5 pl6sacyb alt(et with air, and the plates are separated by 0.050 mm.6e 0:ys2.pkv(b5dapgttul l(x t(c a7 If the capacitance is 17.3 pF, what is the plate area?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has plates 6qlmxc 4:zp x,of area $0.20 \; m^{2}$ separated by a distance of 1.0 mm. What is the strength of the electric field between these plates when this capacitor is connected to a 6.0-V battery?

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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has a plate separation of 5.0 cm.827h0jvv- ertbl, .*ina xqz e If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between t vj2v-he7la8nit, xr b z0*.qehe plates?

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-mF air capacitor is connected across a (.abwl,b qb7rf h.mqjz654b s100-V battery. After the battery fully charges the capacitor, tb q ajls(.h76. 5qwm,b4rb bfzhe capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remained connected during the process?

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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 60 mC is placed on a 15 mF capacitor. How much energy io omleyv 58vsn7qa a;a2)r 2.zs stored in the capac.a28oo 2m)vae ;5qyl7ar znvsitor?

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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  20 V is placed across a 15 mF capacitor. What is the energy stored in thebe:j3mb- ;hxromu9 kwm,ngx1* z( :ptmtzj0: capacitm30zh 1mgetp:;mx r ut-mo jk(*9zw:b,n:jxbor?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 2.00 mC f1 hf :zmgi8h)ylows onto the plates of a capacitor when it is connected to a 12.m:)z8hyh1 i fg0-V battery. How much work was done in charging this capacitor?

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a 10-mF capacitor is charyj(qhpd 4 er.+ged so that it stores $2.0 \times 10^{-3} \; J$ of energy, what is the voltage across it?

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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consi/ xu2g .uzigv7sts of plates of area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the capacitance?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of plates -6cym d3tcq43. kz nazof area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the charge on the plates?

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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of plates od) cn wwh zt,,9s5fr0a64c zyfo1wgg( f area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the electric field between the plates?

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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is constructed with plate ab a-4wzccfj7i0aj*w4oj hu:7rea of $0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much charge is stored on it when it is charged to a potential difference of 12 V?

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73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is constructcd2p; 6m,xul led with plate area of $0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much energy is stored when it is charged to a potential difference of 12 V?

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74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connected to a 50-V ban)mq fw (*3ml482fwo8mlbjiy ttery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inse w(8 jolmb2 8fln4if*)wymmq3 rted. If the dielectric has a dielectric constant of 5.0, what is the capacitance of the capacitor after the slab is inserted?

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75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connegyipl8y8v ke6t8 6sjy5v :1pv cted to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a dielectric constant ofp81jes 8vv 5y:v 6lptkyi6g y8 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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