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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: 匿名未登录  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 e1*mip5ivcr yc4 y 7j7not a vector?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomb is4 gs *yhinye2; 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 from their s/+;vsdhaj,o z urroundings. Object A has a net charge of excess electrons. Object B is grounded. Which s+hz/o, ;jdvaobject 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 direction of the electric fiellux(pzs l:k.nud). *c d

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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 electriw3mcb.nw 12dgdh9g ,tc field

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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 ho r4zswo+,w9ut llow conducting sphere. They

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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 resm)0rbex 5( gm8k oq1x)szl xkq2tah 54t to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the neb r(qlzhq5)520smxxkk84 x) eaotm 1 gw speed of 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 poi/5+c;md owu5*nl 8hr3l sdtb gnts are at the same potential is referred to 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 eqbq oauk;v:47iuipotential surfacu:7;b kvia4 qoe.

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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 betai p4+qq2tq,

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy acquired 0a:q r .pl.va 5a4p hwt v:amuem14jz1by a particle carrying a charge equal to that on the electron as a result of moving through a potential difference :mzaha 04v a4ruw pa:vejt. .q115 mplof 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 a8;m zuw1sv:basti /0e5m/ 0hly g msy0i3en1y unit of

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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 to tom zg.79xuif+x(wu 9

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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 2.0 m from a positive point charge c7-tn dp6k r;lx.5if9vkc2jt is 100 V. What is the absolute 5 d-7l; ck tcn2p vjfir9tk6x.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 distance of 2.0 m from a negative point wnwy; u.ed+9yoex6u* charge is -100 V. What is the absoxd6;uw9 +ey.en *u wyolute 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 c5;b7f, v 6s:apiulw fyenter of a square 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 ef7; uyv i:l6, fasp5bwach of the other corners is also filled 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 ir+5:gr;za zobs 3.0 V when a charge of +Q is located at one of the square's cornersgz b+;5az :ror. 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 alway*-wiq1 ypt5p48sl 2m*nebw m,hgo0xa s consist of two charges 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 y wvjsic:r.02r 3x2rois 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 identical in every respect except that ona(7bbg7o qs: qe has twice the plate arq(:asqg7b ob 7ea of the other. If the smaller capacitor has capacitance 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 has a capacitance of C. If the area of the plates :xhiu kj9 cn.;ikbl udkk8;.+is doubled and the distance between the plates is halved, what is the ne.u bk;9li+kxi.du kj 8:kh c;nw 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 remov )zyeeq( / xwd(myv4q:1cg6h led. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What h(xl)e/yq4wq (1v6e:h c dzgym appens to the potential difference between the plates as they are 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 of a givens 1a 5(jpg96irt7nba x capacitor is weakened, the capacitance ofj7t 956a1pns(igbrxa 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 maintained with constant voltage a nptyj.8 q1/: l.wldwby a battery as they are pul1pnljl yd 8w tw.q:./aled apart. During this process, the amount of charge 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-pld8 (fy/m0d ,(wvc 99q enzengzate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field du/ze vdyq(c d,8z9n 9w nem0f(gring 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 material between the plates of a ca4lnb/d(qi u b;zkr(sxtk)c). pacitoxtd4ui(q rcb/b( ;z)l). snk kr.
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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 ofpz 6n;qg2 l0up a capacitor. What happens to the capacitun;p p6g 0lz2qance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such as paper is placn7v.7* /azsy jy(v odzed between the plates of a capacitor holding a v7.a /y d7joyn*vz (zsfixed charge. What happens to the 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 bnqcewh x6cf tx; h/:5/1q:cqis connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates ie1qwcb;:h/nh5 cx/ c: 6fqtqxs 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 capacitor holding a consta qpd(o69n e amrj32y2-cjflm-nt charge causes the energy stored in that capad lr3 cfmjpq9 e6j2- ayn(-m2ocitor 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 g: ewfo jh+a fa(o08j6jiven capacitor causes the energy stored in that capacitooea + (hf0jfjojwa: 86r 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 energyee;) 0:s tpsbt to move 10 C of charge from point A to point B. What is the potential die0t:;sb)e pt sfference between points A and 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 an electron from point A, where the potentialocs)60wg7z-8aurlo u is -50 V, to point B, where the potential is +az) s wou7o ru6lc08g-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 aa(qv*7n:z * mn4 vxdewt rest, is accelerated through an electric potential difference of 500vx*mq ae:wn4*d(zv 7n V. What is the kinetic energy of the 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 reg *bw- racl 09yt7qig8st, is accelerated through an electric potential difference of 5i- tbag0w9*cyrq8gl7 00 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 potential differ7zh(3q 5 toqybf2msd,+ ccey7ence of 1200 V. What speed dc5eqh z,s +ct7bmdyo7q2yf 3(oes 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 pm6*a1ob4eyk do 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 throgyfv xx2*2po ph 4il-8ugh a potential difference of 500 V. What is the velocity of the electron ayl8xpg ohi4fv 2p2- *xfterward?

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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 dciw5d,qz* 2h;hvmtq3,s , mmobject is accelerated from rest through a potential difference, and afterward the ball is;,iqzwm3*mhcdv m5hs ,, q2 dt moving at 2.0 m/s. What is the magnitude 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 maintains the electrical potential difference betpo/b/vhbcfq bk4 f+n 3e.71sw ween two parallel metal plates sep7kc3/w/.b1 o+f f4svenqhbb parated 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 magnitude of 500 V/m, is directed pa;w:en -ibh1 uyrallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0 wu:-e1i hy;bn m?

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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 dir1r (ld 07)h ikycjss-oected toward the east. If the voltage measured relative to ground at a given poinc7(r1s)d-s o0jyil kht is 80 V, what is the 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 electric field yi l-nnn1yv2i7 )(tji of magnitude 3.0 V/m. What is the change ity7nyv)jnn(-l ii1 2in kinetic energy of the proton?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated by 0.20 m, are connected to a 12-V battery. bq g,t91 7ctbg2 dnmn2dfq**v An electron released from rest at a n*gt7d 1b*mbt9 v2d,2 fqngqc location 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 0.20 m, are connected to a 12hlfw8(+6wnuiz yi8 3s-V battery. An electron released from rest at a location 0.10 m from the negative plate. 8f(ny6swhw 8lz3+iui When the electron 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, separated by 0.20 m, are connected to a 3h d(rr i4:ozd12-V battery. An electron released froo:ddzr( i3h4rm rest at a location 0.10 m from the negative plate. When the electron 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 field of6 8jdd3h1futg kxnx(l/jj ex.k d5o/( 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 1.0 m directly east nke//dj(xd t 5kjoxh8fu1l .jdx (63g 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 electri m3bn(;nfoto0 /xt0g3 efnv4 3gt lf2ic field 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 1.0 m directly south of that v gnt3fn n 2l;otgie4(b to mf/f00x33point?

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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 potential difference of 12 V, it will acquicr)psy1 l/p -ure a kinetic energy (in the abs ru-p s/1)cpylence 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 a .;w:lhbx z v4kxpjgll0.) r6r:yah(o 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 meter s0nprxlsu7 s mmh 86.r.3 ngrp rl81k-co*zo k-tick. Find the electrical potential for the center of the meter s8 8k onhkxm por-*szp.l 07rr -13mrc.g6unlstick.

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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 pot2 0yvfflrlyve 3q) 3m1ential is taken to be zero at infinity, what i 3 m1yf0l lyvqvef)2r3s the electric potential at point (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 charge is at (3e +w0 zctezq:3ek+i 29pm g.g*zb p.je.0 m, 0). If the potential is taken to be zero at infinity:eczzegbtm3+ e pwg. jqkp*0z ie9 +.2, what is the electric potential energy of 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 iksd xq*6+xtg/ s at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the*ksx6g+ qxd/ t work required to bring a 1.0-nC charge 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 placed at the corners of a rectangle of side xdjr(x.s0l c amlh+;-1gy3u es a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, a0a1 se ;(l.cgxmluyxhr 3 +-jdnd 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 +flg;mje5()x ) ugx aa/ qfg.z*m9kq-r4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. Wha;ulza-meam5.jg ) qxgxf( kf *9qg) r/t 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 (charge +2 9 8n3zeeuaef6e, 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 charges, each of 2.0 mC, at the c ga ls slv;7z5s45nqhrx3 2ksz./y5 nnorners of an. yras q;n25glzn s7vl/ s4535kz shxn equilateral triangle of side 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 plates1i)egtf( cu;h of a 2.0-mF capacitor when it is charged to 100uhe 1i;gc( ft) 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 aryep06a6 h)zo nea $0.50 \; m^{2}$ 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 with air, and the plat3yb hyd2 q(1qznof:2 tes are separated by 0.050 mm. If th(q2o y3tq1dfhz: 2 byne 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 o4jymhptso )2* f 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 hasw j8n, j1wld.lqjgf ;2*a, vzu a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the highejv;uzf* jg d,aqjww l ,n182l.r potential, what is the electric field between the 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 i jo7gx dfgo u ,r53:8c.7rzjxgs connected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the b,ux z7j 5:r 8cj7gdfroo.x3 ggattery, 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 mFh woo*-,rbvhu ;u.x0 f capacitor. How much energy is stored in the cap b,xuow huvrh*.0o ;f-acitor?

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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 stqcvny5e)(4n ud.( mthe capacito).s5cnedtq(( u4n v ymr?

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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 flows onto the plates of a capacitor when it vyk94bp dpoc(xsuu4 7f.8i l8 is connected to a 12.0-V battery. How much work was done in chalxi9.8ds 78bcuyfp(o pk4u v4rging 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 charged 8:ngv ter6br (-37 .edahx;+0uqkwt v h0bjavso 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 consists of plates of area astd 0i -t)t6m$1.5 \times 10^{-4} \; m^{2}$ 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 cap-s7*jhhiyafz1 (zt t4acitor consists 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 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 con9p2;nkc 7i zsaj 2gyt2sists 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 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 area ofkzg2 5scv*h;s $0.40 \; m^{2}$ 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 iio6.hnuxf7yy v+ e, o/s constructed 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 battery and becomes fully chr suyd;k53 cr*arged. The battery is removed and a slab of dielectric that compl ;u*5dr sy3kcretely fills the space between the plates is inserted. 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 connected to a 50-V battery and becomes fully cd;ohtdw)pz fl3h6 imx-09b .nharged. 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 of 5.0, what .t pznb owdx l d90i3-6h;h)fmis the voltage across the capacitor's plates after the slab is inserted?

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