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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 jd15fthyzen x;gm 0,7vector?

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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 i sv07aq tsc.(upd5.fws 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 surrouy 0e1wbzt6vgsp pk 738ndings. Object A has a net charge of excess electrons. Object B is grounded. Which obtwb 8g71 zp k6yp3es0vject 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 ouo337p u(yhgthe 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 dx s0pry. c)6qjirection 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 placed on a hollow conduct+k+thf c::axs 9oj ya4ayw),aing 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 q9b pp nx0o39vfrom rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the newx90bppo9v nq 3 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 same potential e/2d 1q :aao +hxwv jz-:lm8pnis 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 22x* se; :nsxmut0; jyb6sjqm A to point B along an equipotential surfac: ;* ss 2j60tnxyx2b;muqesjme.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface m.jn)t+w4ide j*g xn 2d(;s :0wkllraqust 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 carrying a charge equal to that on the e .dovpoi .t7t; 3g9yoglectron as a r.9gvo oo ;pt gdi7.y3tesult of moving 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 unit ofg ez,zltuvma7 n(.6:h0d8ta r

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt co. lg pimo3zmu;p;; ua-rresponds 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 point5r;r(; yagzyx charge is 100 V. What yyg5 azx;r(;r 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 distanxut3:fyha 9n* ab2m 5vce of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m awfmt:a2x3 *uha5 9 nyvbay 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 cente2:0t.ke1gzd o xavpk6 r 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 xvtp e1:akdo.0zk2g 6 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 y;4qpp:-yj /zpgbv.j of +Q is located at one of the square's corners. What is the absolute potentialyv jgbj:qyp;z p-4/. p 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 co07iv7;5 m6uoaeww:7klz q0 gwvtg,a )es v6wg nsist 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 is sw1+1zv 0o 0jkl;rxjc:8wn k ha

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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 i6/2q(jr jq4qrkf i)nj dentical in every respect except that one has twice the plate area of the other. If thekfqqri j j2)q 6/nr(4j 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 t *.env7 b5qadis doubled and the distance between the plates is halved, what i e7a5n. tvdb*qs 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 capacitorfbuoc k f2c4wc :r-r7d8+tx( u fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) Wc7 r:rf uo4-(8fcu2wbk xdct+hat 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 fiel e-mp: o.4u-sf(ec 0krjs9cujd between the plates of a given capacitor is weakened, the cap.p:jeu sec (j0-4-smk9fcru o acitance 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 maintained with cons*1+ce k- gq48j bej s;axqzb1ctant voltage by a battery as they are pulled apart. During this process, the amount of charge on the platcb ;xqjg*j1-ez8b4a1 qkce+ses 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 maintu(b4v2rhms8ll1 f hy /gcd 9wbk ,/y3jained with constant voltage by a batvkf8l(4m,jgh/h ybr91s cl y3 bdu/2wtery as they are pulled apart. What 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 material between the plates of af2u jgo4o3t i(ii3tqm+na5 +8 rq43)k zn kuaa capacit++n u3q45kiitaq o( ajm g3inka ur o42fzt)83or.
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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 plac ae0b1ypp w7(med between the plates of a capacitor. Wh pe7(ayp0b1 mwat happens 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 materiab.3+rhkdnqt*sh, f* 9 zu.byll such as paper is placed between the plates of a capacitor hoh zb*9nbh*s tkryu3+,l. .f qdlding 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 cor7vti4 p x3* zasd2 uy(5b7onmnnected to a battery and becomes fully charged. The capi(bsm*3 ox 7tprza74 5uydv 2nacitor 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 capacitor hollju:iv vo 1cuso 5i5)9ding a constant charge causes the energy stored in that capacitors1iciu5ol95vv: uj )o 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 causes the energ7.lird:ohxn-ap z *)j 7 wcp4qy stored in that capacitor td7c* )pinho4j l-zpx.7aw:rq o

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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 i 5ajp:x;mp8yB. What is the potential difference 5ijx; ayp 8mp: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 dkvb1 q/4+.v ohxc/qgpotential is -50 V, to point B, wherbh /v4d+o/1kcq xqv g.e 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/mt smyec (:fo 2i3wrv -4yxirwx+5g7 accelerated through an electric potential difference of 500 V. What is the kinetic -y ixtg+r2 v/mm:srfwo(4yw x 57 3ceienergy 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 accelera :u1ytsy.wzsfui, f,)ted through an electric potential difference of 500 V. W:t,1ifwy)ys. zs uuf,hat 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;,wnfzl,6cp, at wf -y difference of 1200 V. What speed dop l z-fyw;,fw6,c,an tes 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 9zll zzz,:-g p/.0 V 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 through a pote) gqz;1r )wlwjntial difference of 500 V. What is the vew)j1wlq gz;r) locity 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 ncjs3dnc/zg37t; . urof 20 mC. The object is accelerated from rest through a 3z3;nd7cu s./t rj gcnpotential 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 dif0ip;7ukpfu i5ference between two parallel metal plates separated by 1.0 mm. W ku0;i5fpu7i phat 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 a5pd+ 8;1w55nw-lr ,vmnmerh hpcsx.y magnitude of 500 V/m, is directed parallel to the +x axis. I5lr-v w5 8r5,pmypewmh.+1s n;dcnx hf the potential at x = 5.0 m is 2500 V, what 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 east. je /hal(vi/gs5+ orwlx7q ( 2xIf the voltage measured relative to ground at a given point is 80 V, wl(vxr q /lai+7sxg2e(hoj w5/ hat 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 of magnitude 3.0 ( f 6apr,pha-t.qrbo2V .(6hat-rr,pq fo2abp/m. What is the change in 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. A,6. m8ick3knh5vg3yhr tgf : hn 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 yhgki g v3 :mkhct,n86f3r5 .hthe 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 con1w7qo/do0 tc wnected to a 12-V battery. An electron rele /dw0co1 oqw7tased 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 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 b nb( xa0psm1z7y 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from tbnxs 7(0 pmaz1he 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 elect15 .c,gz p6d2 kaohqby:/0acvc e8kikric 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 ataca p01k8:dk/ybg ik6 zhceqv .5c 2,o 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 electric field of 50 N/C directed towarxzh+t7gp:w:(gh 6 h0ott)vzid the east. If the voltage measured x+ w0hv (7) i:htotzgh6pg:zt 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 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 thr mlbxfq.9;(:g,u4qr6g ajkdjqy c g77ough a potential difference of 12 V, it will acquire a kinetic energy (inf64g7qg umj7cb r gj;x(a., ly:d9qkq 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 digy uf:3d4;9fm bs9m audp3(ii stance 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 ele3mcy ypr0)yw;6ul9c a ctrical potential for the center of the meter sticwccm); 90pyy6r u3l yak.

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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 )e; wn z8tmh9tbho,u) the potential is taken to be z) hth)u;nt oebzmw9 8,ero 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,mu zmt 256ts5l 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what i5u2 5ztsm tlm6s 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-nCch 1y8s.1nxhz5 lckg ;;vaol* charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the 5;vxn kshhl ;1ccoy* za8.l1g 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 rectanly2/ n5hnsw;ihlztn 1-drb; /gle of sides a and b. What is th;z l ntiyds/hrbhw- 1n/;2n l5e 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 ofjt /)bj;bl(umz 2w s8a +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed char/j)w zat;lmsb82j(b u ges 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 (charge +2e, mpaz+ n bx+7ou-ass $6.64 \times 10^{-27} \; kg$) 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 to32 4j- f hiwbpj d+xa2n9h-qbn place three charges, each of 2.0 mC, at the corners of an equilateral trianglehh3f4bdiq229x-awnnj+j-b p 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 charge 5p4q5gl h:owod to 100 5g:olw p4 5qhoV?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capaciuflh m+mm ttbli,v)ls+56 x,*tor 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 ikf9vyno:1c u3)kzb v( s filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate 9vo cvy3u1(k ):bkznfarea?

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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 :hs nl)bg26 /r/*5 lxr-0jwu +ght g.vktgodh has 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 pa )c;x ;u,vc2/+ 6h gpitdwsfe .uhcy3late separation of 5.0 cm. If the potential difference between the plat)gw, .;sacchdhu3;ye +tfi/ 26p uvcx es is 2000 V, with the top plate 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. After the bac j+nnnh5 8cp;ddtnr8t18f7 si)cv3zttery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How msvi3frcdp c)58j81ntn 8 hd; ncnzt+7 uch 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 /5* si j el1q1oai rzr9-uf1kn15 mF capacitor. How much energy is stored in the capac isoqalr15/fuk1rz9e 1 *-inj 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 capacitor. p (z- 1won: pk+ttg2pu What is the energy stored in the capacitorput1 +z no w:pg-(k2pt?

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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-.ypf 2)v-g.vklfc.vwm cpi3 of a capacitor when it is connected to a 12.0-V battery. How much workvvcwcmgy3ki-. .2-p.f vl pf) 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 charged so that fsmjqm zhv8axzn99xm --r: ,8it 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 plat5y q2f4p,y umbes 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 consist*z wqu-yfjy(/5uleb* s 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 c /ufx.pr+ 7*ttau4s vqs ga3e2onsists 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 arl(32 2o;j:jpnub w*bj5la ohmea 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 al :;m5s20pt 2yl7,jfbymgxnlsf0d k0rea 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 isf)p khr 7-trq: connected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space betwe7):kr tfr-hp qen 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 fufo0mn) fco j20lly 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 of 5.0, what is the voltage across the capacitor's plajof00n )2comftes after the slab is inserted?

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