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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 not a v,zv, qfkd( t1pwh3l o.ector?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombun*y 8rk/b 4mq 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 insulat cl0uy7nn43dtt.g fl1 ed from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher p0ul.1dfyn gl 7ttc4 n3otential?

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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 elpgc 8 d ;jky8g0b;0nj2iyapf;ectric 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 oppov3 ab*+;gg ehymb.xx0site to the electric 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 hollow conducting s7 5 9fr7 uhuc ,nzk:bvmhc2520wloz2 auw2qhqphere. 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/x3jyya lj9(t/:jpgse0rk5x. 1adyi rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed oiae 30k gpy5.yl9jx/(day js t/j1 :xrf 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 potenow whw(zp/na,.s66 ahtial 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 towe9 q ,n69cvaq cg*j0f point B along an equipotential surface.fv9*geq0j6wcq9 ,c an

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must4o) um jz-a9nr 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 k0ys sjs4 47gter-p+aqkj,4 mparticle carrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is referr ,-jm7k spjskre40a s+t4qgy4ed 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 isiwq 0qjgtc -l9k3 1l g6u0jmm( a 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 correspondd8axrn/fyb 5* annb +k--3m bvs to

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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 c9r 5:r)vul zw3yir,pis 100 V. What is the absolute potential 4.0 m away from the same point cir9pulyz c,3r :) 5rwvharge?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potenti-cdxck97bbu83h 4bgi al at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potentia xb8 c i9bhbkcd7g3-u4l 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 square is 3.0 V when a ug6682nn m-8y-ua2vr j te g z/zutmd7charge of +Q is locatedz vma/7t-g6j2 2d zn uu-ynuem8 68grt 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 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 is 3.0 V when a charge of +Q is i.f 9f 6j:q;i8p zmxlu;gqxsxr1p 9h( located at one of the squ96.r 8; l:xxzpqxm (9 gsf1ih;qju ipfare'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 consp;p1 x: fgnffoc923h sist 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 3kndln-spp lj+ 6o a3*is 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 e0 *+d/ /hcnbzss z0 am30sserqxcept that one has twice the plate areas0 d//zn*ha r ce30s0smbs+qz 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 platexxgu,w ;hnss 5nlt1c 1d9n+ 5d-6jvmbs is doubled and the distance between the plates is halved, what is the new capa txm5cn1h6 ;dwslbsj,1 9gu x5nn-dv+citance?

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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 removed.qiezr1ct5;9 hqej ,+b 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 arec,+1bej5i;t9z q herq 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 cc. 62p zz.vka3sl-scvz b6i* of a given capacitor is weakened, the capacitance of that ca.s6 bcvs3p*c kc6 v- .izazlz2pacitor

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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 cj r(zcztk7 3mt/xvx- x-w 61liapacitor are maintained with constant voltage by a v1 tcz6xm /7krz jxxl-( t3iw-battery as they are pulled 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-plate capacitor are maintained with constant voltage xvpkw z3iibr8 a jy4sq8640vwq/99n uby a battery as they are pulled apart. What happens to the strength of the e4s864jq 9 iwqvka8 9xzbpvwi uyrn0 /3lectric 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 fo aqq, 95b;luc+ 2igzoer adding a dielectric material between the plates of a capg 9,i2bqclz + ;5uoqeaacitor.
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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 clk t*-t(tfevnfbe cu;1st6 0;apacitor. What happens to the capacb - (snc ktfuv6et*1;e;f 0tltitance?

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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 placed between the 7dca hqi 5zee*5plxqn 3.:n)(mmfi :iplates of a capacitor holding a fixed charge. What happens to the electric field between the pm * .n:c(f diizaqxlm53)7 npi:5heqe lates?

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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 e98z*ml -jemwd9mg*-) sxq nw lu6w:his connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased shl-zm*9meweujq 8:9 *x) wmgwd nl6-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 holdic;:cnmozu0y l *8cwgw*z- qte )8i4gk ng a constant charge causes the energy stig*c-0ec4*k o)ltnw gq:z88uycw ;m zored in 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 caq 90z rn7vc2aipacitor causes the energy stored in that capa 7zv9nacr2 i0qcitor 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 point A to point B. Wha nl(lvmqs7re(vw9q+* t is the potential difference betweens(wqv r(7+* el qm9nvl 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 electrt:ox.3 kaw:ur on from point A, where the potential is -50 V, to point B, where the potentialr: w.oak3 ut:x 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,3v(d sprovh)f2+a6q :rw yc*a is accelerated through an electric potential difference of 500 V. What is the kifqvd(was ry)o 2r3 c:h6a* +vpnetic 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 rest, is accelerated through an electric potential diffebz))y2 sl7vqmuth1 //t mwzn7renwv qt2z mn zl/1yb )/)t7uh7smce 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 potential difyxpzd7k tg,5tw ox853 ference of 1200 V. What speed t8 wyt,pzd7xg3k55 ox does 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 do in movingu2)lw,5 s /aujgl7 fjk $8.5 \times 10^{18} \; electrons$?

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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 through a potential difference of 500kiv :;x,ugia+ :r+x jy V. What is the velocity of the electron afterwaryj,i rvg+ k:xux ;i+:ad?

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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 m.bmfor z1 pg4( ipago6una/e;+z.;avC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential differencezao6vpg/ g. on41+e ifra.(;bp amz;u?

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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 between two.,s tsl* kqkf. parallel metal pla.sfk*.sk t ql,tes 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 magnitudnwwg17q8)l bs65ncpob 8 u(r hjylt 8;e of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what iswwo86 p)lyu 5rcs17bt(; 8 ljn8nbqhg the potential at x = 2.0 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 directed toward the egobelx2ik 3h( 5j5 lw+ast. If the voltage measured relative tlej3gbw25k(l oh x5+ io ground at a given point 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 direciwj-. tmnv/2/vptn/ction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the pr c t/jtnv-w i2/nv./mpoton?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, sepak0n20pdm+- zt1 vwb rsrated 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 electron arrives at a distance 1.50 m from the positive plate, what is the potential difference bevsm0tn1-w2 dk+rb zp0tween 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, al8n-i/wi xur r*+y d2nre connected to a 12-V battery. An electron released from 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, how muchu- i* nry8n 2wr/+xdli 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 12-9gpm*rwy .s8 (o uwk2uV battery. An electron released from 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 *u9poy2 mk usrg(8.ww?

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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 of 50 N/C directed toward the 3 th,so3qbru- 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 e3u rohq,3-bs tast 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 directed toward the east. If *,a 2xuna gm43ijuk8(th ywszdp6/8kthe voltage measured relative yk/s3mazwpt2u xuih(j k ,4ad* n868g 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 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 pote/60ctp wuvx:n k98yj gbq4wp7ntial difference of 12 V, it will acquire a kinetic energy ypvctuw/8 g bn7:w6 xpj90q4k(in the absence 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 ,v6 mmhx fwac.u+om(2 1mbpb (at a 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 stick. Find the ele( 9hsxv-x4 ,q-4 fcgmzyy*asf ctrical potential for the center of th-x,z vm(xhqaf*4yy-s4sg 9f ce 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 a6rfcuq6,*p6 2 dccsd-ws vod7 t (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be rfq2 sowd67spc -d6*cd6 uvc ,zero at infinity, what is 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, ohc)mouhom7++ cy0u,me )ul mves)y0d8w e;30) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric pomy+ d0uc o,wo y8v c)o3e mh7)hm0+seuemu;l)tential 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 is airb9e/))n wxct (3.0 m, 0). If the potential is taken to be zero at infinity, w ) wrnxei9bc)/hat is the 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 recta z46abq7de*okqufq4p h q)3t /ngle of sides a and b. What is the potentit 3kdq *qq 7fbqo/644 u)epzhaal 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 placed in two diago.mgli4 a:wk vnf l80v-nally opposite corn0lm k:la- f8wvg .i4vners. In the other two 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 (chac co9c hs6tx9,rge +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 charges, each of 2.0 mCoyvk9vk )zme(4pa xa 15z8,hb , at the corners of an equilatera)(91p4, yvavm 5heazb8xz okkl 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 plates of a 2.0-mF capacitor when it is charged to 1 j/eep cy8l4(zu0sr/w00 V?j 8(wc /yr/uepl04esz

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capaci nt0iy5)* ad, hzqod nyxl(q,9tor has plates of area $0.50 \; m^{2}$ 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, and2 ;yrko-t96gtmmd (pa the plates are separated by 0.050 mm( m-pt2 o9ktya drm6;g. 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 of arz7xack)vqx 5fz * iq0(ea $0.20 \; m^{2}$ 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. If the potential is8w ,)gthzx3 szh*8ydifference between the plates is 2000 V, with the top pl8s ,z3hsx*iwy)z8 htgate at the higher 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 is connected across a 100-V battery. Aft+ cz+ 1hqe0walheeh;5 er the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additi5lce wh; +zhq0e+e1 haonal 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 pl 4i.0h9fwqtvn jq mk6zle0;( gaced on a 15 mF capacitor. How much energy is stored in the capacitor j. wk(gq eq;0lvm0ih64tz9fn?

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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. Whq ,w.ic/a t-ykat is the energy stored in the capacitor?y.tc w-akiq, /

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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 ono9o2s-tggze84egdq ,f3w . u 4yxuv)vto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this ca )9u-4y4 tw ,g qde3eo.ogxzf2 v8sgvupacitor?

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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 so that it b e3q7 e-r azx)/,rt wps1d/+fa*ppv pstores $2.0 \times 10^{-3} \; J$ 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 are7rco-d )wou,l a $1.5 \times 10^{-4} \; m^{2}$ 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 plat,ovi3olm q-1i;g. p utes 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 consis hzl;mx p6)8bjts 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; lh/6r+kdc jn plate area 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 constructed with plate area of h)x p) t2n0-rcxx;haf$0.40 \; m^{2}$ 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 beco 0.rw bi t3wh6pmrr37omes 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 con7r0.3rbo6wi 3 htm rwpstant 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 char - elo(1ecvdplg(xw*7zd+ sz+ged. 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 is the voltage across the capacitor's s lc7de -gldp(zwo++zvx(1 *e plates after the slab is inserted?

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