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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 a3b3 wb aj(w.9uu(f kb5 oyo /uy.zquz+ 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 i3gu 7f zd.e uae:hr c; fq95qnww .s)44llgf6js 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 surroundings. O z( rh5qvt1zd. .lii0rxp;tm 5bject A has a net charge of excess electrons. Object B is grounded. rz5.t5r0.i;p zvl1 dhixq(tm Which object 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 th0z/wuxqn5 9x ge 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 directionc3f0 q*wq1.p8ra cmql opposite 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 v* xdpx 81 :.bxak7 a6maxwrm6placed on a hollow 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 rest to a a; zo8ooft5*b speed v by a 500 V potential difference. If the potential difference is changed to 2000 V,o8bz5o* oa;tf what will the new 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 points are at the sames.yvt964 s2mjhsev zl zb65u + 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 e0poq3si0, abp4p6f qomlbrl 2t4b) owd6 :(pxquipotential surface3fl :o swbrppqal i(2bb0p0mt)p,q ox644o6d.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surcbec:-uq w203qi azl-face must 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 particle ) ra3zcmvce*:carrying a charge equal to that on the electron as a result of mo cr va3e)m:*zcving through a potential difference 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 unitv 5a)sh)e*/m q qi)eev 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 correspondojay-gy1d, bj:fg v+ /s 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 vlkd1fg.h-2 zof 2.0 m from a positive point charge is 100 V. 2f-kvhz1ld g. What is the 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 distance of 2.0 m fromk6htj* )md-.xoa-pm-c0m oba :x qi7m a negative point charge is -100 V. What is the absolute potential 4.0 m away from m.6 momo- tda0a -: j*7-cqmpi)bhx kxthe 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 a0;cd z* ;gznqet the exact center 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 each of the other corners is also filled with a charge oz g d;nzeq0;*cf +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 chargl ij,7mo)x g vytxh.87e of +Q is located at one of the square's corners. What is the absolute potential at th8 7lo mivx) gxy.htj,7e 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 *0q+p, 3/vsmk rkdmy jconsist 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 i )/ycwro4h,eb9 facq8h3c cy1 s 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 e: 9m1 gj+3lp9xxvw xijvery respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger on:m i9g jwvpljxx+19x3 e 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 h7. h+5 uqqmtdz-hf3 xplates is doubled and the distance between the pfh 7 5.zu3q-m+thqh xdlates is halved, what is the 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 remov6jpt rsobz; byxt/e 6cop11ca ms; .irs:z98+ed. The plates are immediately pulled apart. (Wit6sm1xobts 1 z;:8ya 6psrj pi9z+r ;t/coc e.bh the battery disconnected, the amount of charge on the plates remains constant.) What happens 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 give-je xmv4.wy 0i,m9z(d: kpxz rn capacitor is weakened, the c ,z:9-yz rkxm jex.piw(m0vd4apacitance of 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 maintainsc f *lw,a/5:va:dsleed with constant voltage by a battery as they are pulled apart. During this process, the amount of che:vac*s 5lwads/,f :large 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 wi)-ao bz;z- giumt)1eb th constant voltage by a battery as they are pulled apart. What- tu)mo1 ez-;bbigz)a happens to the strength of the 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 mater*gu j* -xer4etial between the plates of a capacito4**u-g jxrtee r.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric materialj2yhjo sc q.zw:fu2*; such as paper is placed between the plates of a capacitor. What happ:y;q wsj hu.22z*ojcfens 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 material sucs8/m*mbvy )j-o7qs b lh as paper is placed between the plates of a capacitor holdi/ bsbv-y8l)msom*qj7 ng a fixed 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 is connected to a battery and becomes fully chargedh x3qed2 0 fv0gt+e0wr. The capacitor is then disconnected, and the separation between the plates is increased in such a way thq 0+dxe twfv20hgr e03at 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 ao y/b gp,-2wjxi+dgkvg 83m t0yr we+2 constant charge causes the energy s 8 te0x2ogg+b pdyg-j+/mk 3y r2wwvi,tored 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 acr;i0p4 mkssz.boss a given capacitor causes the energy stored in that capacit4; mspszk ib.0or 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 tom(vn5/k hbgg po6l3x , move 10 C of charge from point A to point B. What is the potential differenc6/xp3n,5 bh( golmgk ve 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 /n8v vd3fc3 v 0):zz x2wo33igyjqccc, where the potential is -50 V, to point B, where tvzonj3zc y0cg)38 vcv w/d i3fx:3c2qhe 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 e5gg4lzdg.s7s* otmr6v1k o.xlectric potential difference of 500 Vxdo.tsg76rl g m 154oz.gskv*. 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 restjem:v a7r7b* f, is accelerated through an electric potential difference of 500 V. What is the speed of there7mvfa :b7 j* 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 difference of 120f9x oa (,n.q8x4kqlpk 0 V. What speed does it acquire?lpq (9xxk4, an8k. fqo

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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 m on *cryql5f x10nuapkpm;2,df+r0-poving $8.5 \times 10^{18} \; electrons$?

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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 500 /uchgmtg-, f6h/ ssv7 V. What is the velocis6/m7ucg/, tv h- gfshty 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 reb3k 9t, rbm lkf/,ths2w-tt7djey* f4st through a pot2/hkd4 mt*btw7kfe fy9- tbjls,,r3tential difference, and afterward the ball is 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 betwvu6ndxs/fwkn ;y6 i.s kz94t, een two parallel metal plates separated by 1.0 mm. What is 4svsf9,z. 6x;n/dtwyikk 6nuthe 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 field3o2-h:b5dc fz zc mw1l ogq.9g, with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, wh ql d5:gzhw2c .9zc1-foom gb3at is 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 eas b/s50fimbc5 rt. If the voltage m /bmfc50ibr s5easured relative to 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 direction of an zs,,ip ;f4kr velectric field of magnitude 3.0 V/m. What is the change kr;pv,, 4i fzsin 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, dlh x*2b(j,f1 vy3;zm3fih /tlm mal*separated 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. Whl1b,h;m*daixzml(thmf fj32 * 3yv l /en 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, separateu3kkv2q ioi tsq.) s:5d by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0iki vt usqs :oq32)k.5.10 m from the negative plate. 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, as * 1glz0zsbba 7dm/p-re 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, m-a7 sb0 g/z*1pzsl dbwhat 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 of 50 N/C directed towarf1 wyr5:jof v4d the east. If the voltage measured relative to ground at a given point in the field is 80 V, what isfr oy4j 51:wfv the voltage at a point 1.0 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 electricb*vzb5. qmou+;7kd 6f0fao9fbubs q9 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 poinfmkbq oa.fu0 zd6oq *s9 9bb u7b5v;f+t?

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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 8,edvq0 isg se3 1pp;uo8t:xsV, it will acquire a kinett0 ue; x,eovipgp8qs38s: d1s ic energy (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 at a dista dr)n a4gc*uu.m4mj2*q gnn1 gnce 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 m xg0y.7k wg5 (vvg4hpmf17vx meter stick. Find the electrical potential for the center of the (7xwgv4gmg5vvy0 f kxp17.mhmeter 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 potrkajzdnucjv -fi4 nq9fl 4q90 5x,4-kential is taken to be zero at infinity, what is the electric potentia, 4djcn5kr940uf-ivka9f jzxq-lq4n l 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 l)c7a3vl t) ybf+ ja(f7gec x8charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy ofcj)la ylvx8(gtc+ e f)7af3 7b 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* 7x5djtvb c/xc;hz9e- 9h hwl) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what i l z c;w9hx5h/ hdj*97-ctxebvs 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 apddt y)1c4s4 i rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 )pdyc d4tsi4 1mC, 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 9 :tre4wo.ke1fv w;ekdiagonally opposite corners. In the other two corners are placed charges of +rw4t: 91 vwe.k;okefe3.0 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 (charget9v)42 a plkti +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, eaco(ihtwn vmhfr*1**/src z. 2ch of 2.0 mC, at the corners hmr*zts *cf /w (c.hon12r iv*of an 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 op oat0erl36m/* 5ajg rn the plates of a 2.0-mF capacitor when it is charged to 100 3 */pmg05ato rla6rjeV?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate cap y oph)n -fyl+qf,7e8cacitor 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 filleuxj5:wu*zf;7ir.bc h f ..ax ud with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pf;.xhux.u*7w za:j. uc5rfb iF, 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 hasbt(j775ryfj y plates 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. If t:c f*stoak7u 28rkv -ihe potential difference between the plates is 2000 V, with the top plate at the higher potential, what is t8kcf2u7 :ost-* iakrvhe 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 connect 5 ncg/e53 wrr6fr7weeed across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed inr5ec 7fr 6/eg wnr3ew5 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. Hocv; u*/cm *u g-l0xixtw much energy is stored in the capaci t/cguc-0lmux*; *vx itor?

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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 capaci5tu;9jbe9(o w:aw,0hmqd bsz tor. What is the energy stored in the capacitorwa(9bwtuj,sd95z ;0hb e: o qm?

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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 caa5(qr b f// d(7x.tt x0uj1otr vxpu3qpacitor when it is connected to a 12.0-V battery. How much work was done in charging this(qq1pu d/7/o tvj3r rtfuxx5a (t.bx0 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 chac21m d3 re icuwdt-e:4rged 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 consf6t 3j9h )) pines8bz:hv;y taists 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 capy0nla. lrv4nrc5tlcayq91eo ,2nx6d fpp 6;: acitor 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 co.)( r-qj mhcmfnsists 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 p:wu:48ygr9pg;zyb j( - a qrqwith 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 capacigd. .,odnk gy*tor is 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 batuezcuu/ uk*(bym5f6v9olxg 9:. da g:tery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If t6me (a y5.d:uvgux /c lbu*9g:kz9o fuhe 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 foq5snwtror4 f97w16k ully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is ins6o s4nwrf9qrot1 kw75 erted. If the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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