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习题练习：Physics Unit17: Electric Potential
本习题练习来源于51fly国际课程 (https://51fly.win)，是在线习题练习的打印版，您也可以访问本平台网站(https://51fly.win/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 75 即可在线作答)，，作答电子化后可随时回放，查看每题答案与详细解析，搜藏保存任意题目；教师使用本平台可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力。本试卷的直接作答链接 https://51fly.win/test75.html
 作者: physics  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 notoklevd6n;u/g4i-e 2u 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 t ve* n/r;qnu1is 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 rtssd8 9gxa:9objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a highest 9agsr x89d:r 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 dire (a4 x:t1vftdew; )in.i/ xtn8lk mpz)(a)ihw 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 th qvk8/.qnd7 pvmz7-z( v9pfpre 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 s ds+3ed i55sj7so(73 xcsm zwhphere. 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 speed v by a 500 zi:.6 jqs vwb*6fxm 7cV potential differenc*.6qf vmcib j7s6:wz xe. If the potential difference is changed to 2000 V, 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 same potential is refht 8mx.dhf/x7r*q1aln 4d*s y e*ahs)3 6ybtferred 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 equipotent,s1 eevic1n dk8-l-v l42afnxial surfaclcdx ,2 ea-s4-e18n 1fkvv inle.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface me 9gc+a aygesap9z2l76q-ss: ust 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 tk,-8ap 19tydy m+ 3kyy*1hexuu6aj mby a particle carrying a charge equal to that on the electronx+61d1 kmt9 jyyue,ak y3-tpa*8ymhu as a result 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 ij6y(, * sngtfa 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 correspondj k5f7ec z(m6os 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 arqc ( rt;l. is4mmbf/2 positive point charge is 100 V. What is thetls/ .4 q;bcrf2mmi(r 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 atjp ryz( ,p3fh: a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same poifjp,h3p:z (ry nt 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 wa;:maoo-vhb cxg -46ehen a charge of +Q is located at one of the square's corners. What is thec:-vo- oe4x; magh6 ba 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 ohvdt+ 6z l d:nb(--btcf a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute pc b: znlht--vd (t+d6botential 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 n z6ld+jn*7 zl819ko *geldhj3/yjsx 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(i;upu c66,zyy zmcume8w t 106u8ylus 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 one hasp 8(o*7: (vmugn4uh cd stq,hg twice the plate area of the other. If,vogn4qmd h*c(ut hu8pg:7 s ( 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 g fyc(km(-fj8qg, ec)plates is doubled and the distance between the plates is halved, what is the new capkcjc 8 y( ,g)f(qem-fgacitance?

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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 p wenrx5(/m3 ovarallel-plate capacitor fully and then is removed. The plates are immedw3x(mv5 nroe/iately 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 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 af wim,wr83763g:it wcoxm5i plates of a given capacitor is weakened, the capacitance of that capw: f5 837icaww,i3mx imtr og6acitor

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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 colqjf17hf r.0a nstant voltage by a battery as they are pulled apart. During this process, the amo7 .1 jaf0lrqhfunt 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 capa5 z1q dnwdbu2 rd najfslz53g69f 05y4citor are maintained with constant voltage by a battery as they are pulled apart. What happens 2 s65jz frl54qbf1 ydd5anngd93zwu 0to 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 mas 6a;1 3dc9s,fj wnm2j wy*- k-xxbovaterial between the plates of a capacito,vajb;jksxafw1 co6 *9x -3mw-ynsd2 r.
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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 platespk: u6n79s x7 e ps-quq-m+xqdlol4s/ of a capacitor. lx+4 desm7k/- xqq9 pq up76l:usso-n What 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 material such as paper is placed between the plates o e*2gb b-/tyjtf a capacitor holding a fixed charge. What happens to the electric field between the pl-b/yt b*ej g2tates?

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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 ba*3tmzfr:h )oave;fd*l + b0 srttery and becomes fully charged. 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 capaci+e;*fl)drrt *z m3bhovf:as0 tor 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 constant charge causes the hc2 kxcu qbg;+4hf- nu6o+sd woi 9j-1energy stored nb cg149o; ik+wujo-6fchs+q hu x-2 din 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 given9xara 94.4d2ktiq lbn (.ithi capacitor causes the energy stored in that capacit9 iaahr2.i4( it49xknd tb.qlor 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 ene f8 fzc0zbi..lxt7t+i ,l spe2rgy to move 10 C of charge from point A to point B. What is the potential difference between po7.. ll+2ex zb0zfi t,cipt8fsints 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 frou)h9qmq(2m kxmf/ 7vl6l es1b m point A, where the potential is -50 V, to point B, where the potentesh2 1lbq mv (u/k xml69f)qm7ial 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 khu4rl,6 k)tj potential difference of 500 V. What u jtk4),h kl6ris 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 rest, is accelerated through an electric potential diffe6u2w/ xt 6duwmm 96hwor6 /wx6tmmuuo2 9ww6dh ence 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, a3 nttn gmm7 56-lm+lai proton falls through a potential difference of 1200 V. What speed does it acqmgnail5 6t ml3t+-7nm uire?

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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 mgnc vkcuw5 6+7oving $8.5 \times 10^{18} \; electrons$?

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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 yd,jg8 hyj,:03dqb x4a q ( ufcn/l.mwa potential difference of 500 V. What is the velocity of the electron afterwa3d4m /janyjgl 8,,q:xuwqc.bhy(f0 drd?

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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 reshl,es(a)two)r /odjo:d e c08t through a potential differcj do tew :/ahdlr8o0e(o)s, )ence, 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 electr7 gn4x -rcg17nhraay 6ical potential difference between two parallel metal plates separated by 1.0 mm. W- r rn746cn agyh71xaghat 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, 6xmij68 1dx cnis directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x cn6 xdmx 68ji1= 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 dirs j+mtu9,fm6ny .mhn ,ected toward the east. If the voln 6,.m9nmt+syu jmf,h tage measured 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 electric field o1ffqd v o49yd:(co+m lf magnitude 3.0 V/m. What is the change in kinetqc:ym+d9 v4do1o(ff l ic 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 co5u g(x0m874v0o1o ,9diaqqfy ol utpv nnected to a 12-V battery. An electron released from rest at oi 4qty xou9 m vdf lga0v0,up75o(1q8a 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,:c4 eq2:l8 qjh8dg.qjf:f smo 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 0.050 m fco: dhg.qsq4lffm 88 j q:ej2:rom 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 con)x 3(w +owgiy r)e1twe:578bkml yonznected 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, what is the spee:g + lxyw rekm8ww o(i3nt)b1z)y7o5ed 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 vmm,viu0/ l,5k p,sof directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is thp,kv uos,m0fvli/5 m,e 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 electric field of 50 N/C directed toward the east. If (b0 u(fauf l.kthe 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 thatbu 0(flk.a (fu 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 potential diff4 qp.xu)ms +km v:hdmv-wh n..erence of 12 V, it will acquire a kinetic energy (in the absh puv.. mx.kdms- 4hq)wmvn+ :ence 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 distance oq di4vn3:)i8 hwprpr9 f $5.0 \times 10^{-10} \; m$ 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 electricaqalqj y3ley9n s(wcv epcn73.06qk48l potential for the center of t 7ey c9a8vn 6.ke43pl0lscwqj yqn(3qhe 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) art dck7fj:o+:k, pdnu) bpz 0)nd a -2.0-nC charge is at (3.0 m, 0). If the potential is taken t:pzdfp)uk tdok c, )+07j:rb no be 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, 0) and a -2.nw4jt 42n k,wqilm v410-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at poin, tnvwjinm wk2144q4l t (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 9 b: ,egray9ox(3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required t ,xo9rga by9e:o 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 rectang(rvn*+g / (qtnp1njwuhvcz*2 le of sides a and b. What is the potential at the center of t/(+t j2wz gn rq*n( cvvp*1hnuhe 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 ofxaa6w(n 3 u(ff +4.0 mC are placed in two diagonally opposite corners. na(w3f xa( f6uIn 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 (charge ;9:ma :mt tt289xwoqwgqc+lk+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 three5ot 9 40omh,wx1d:9a fgq kkhl charges, each of 2.0 mC, at the corners of an equilata0h:otkxm w o9f54dgq k9l1,heral 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 1uyu .dc-i 3ojis charged to 100uc31 o.di-ujy 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 obm c-b: xfsnp-/2-q ldf 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 capaci554ufrr e2der4b+(t dz-forz tor is filled with air, and the plates are separated by 0.050 mm. If the capacitan4ue- rf +tbeorzr54dfd rz2(5ce 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 platee9k ybcw/;j j5s 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 the pot bw3vclfb1,.o fj 325 jrohh-vential difference between the plates is 2000 V, witfvjlw 5f3.orj-v c3ohh2, bb1 h 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 th7/m oogrw 3br j xf1)b1:fdnt2e battery fully charges the capacitor, the capacitor is immersed in1f)jrr3fng7 /t b:2xb1wmo do 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.bol,6 v u99woh How much energy is stored in t 6ulw, oo9vhb9he capacitor?

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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 (gaolz*pk77 tk 68zau the capacitopt(6ko*k zzu77a a8glr?

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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 isa*etyp7 l, ( gs4f riee7x3 nlm)r+x0f connected to a 12.0-V battery. How much work was done im)7elaf7xg r +0y,l3*nepx(ets4rf 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 sq3 6uivv /x4pvy d5i6;.wvt jwo 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 capaciw(q 990;o4vtjenw xl wtor 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 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 consi z;0xm n-ykxfypb8 i, q/7xuv,sts 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 capacii4 /z1tw kru*bqhy2ili)()n rtor 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 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 coh;ok 4lqeeq rhi-)2baj y)o5 :nstructed with 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 con e j:nvnuxa23 )d7 :j4ywjwhw3structed 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-Vjz3.u ec7z)uu battery and becomes fully charged. The batteeuuuc)3zz7j .ry 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 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 rdsa 3t2hp48 b*vql.:ajg/es 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 of 5.0, what is the voltage across the 2ah8ste .3gr/s qvd:ap4*jb l capacitor's plates after the slab is inserted?

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