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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 not a8c yog87c dl8m 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 coulomao8tk;,+3npw vcqow )b 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 insulated from their surrxw 8w+ d,osbjt+j58wjoundings. Object A has a net charge of excess electrons. Object B is grounow8dx j wwjj+ts+,5b8 ded. 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 directiowtq0r 9c n yi2j6)-ffd z.j*ahn 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 the electr,-( sfp0cfpa 1 z9qqu+mvg+ jtic 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 sphere.q ly13 uo 72opl.bud)pf4.qqr 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 V poteni.m.uf fqygd ru)p/6 (tial difference. If the potential difference is changed to 2fdi ry6mqf()g/. u.p u000 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 az; hoh1gh ykr11i8.aq re 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 equipotential surfacrd)pk ( eoh)r/etl1(k e.opehtr()1/ k (dkl )re

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfac79 cp/gcib3u3 9yyxw4fq2 khbe 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 carrying (urc 2nc2u(9cnlzut6 a charge equal to that on the electron as a result of moving through a po9lc2n6r( nu2(c uuc tztential 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(w*lk ;mdi:sc8; tohj 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 coruq5c. i4uf2 dpp m,/hpresponds 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.b(pu9p+ t 4cicmhf/a20 m from a positive point charge is 100 V. What is the c(/ipuc2mtba4f h 9p+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 dista1t9adgyzvg 8:g0d0i fnce of 2.0 m from a negative point charge is -100 V. Wt i0g80:z19y faggvddhat is the absolute 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 center of a square is 3.0 V w 3c01 l.awe15ugbecor88 ty dfhen a charge of +Q is located at one of the square's corners. What is the absolute pec5t .flg ea0b3 1ycr 8uow1d8otential 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 square4bx- i zis8q 2q8+emx5m ;eope is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential x-i8 em ;+2xp5 smzqqb 8o4ieeat 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 .1t1f qxgnc tcc) ge, (s7ftyiv658bu0wdk0kconsist 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 istyp03bd9 i,w ohkrw (. 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 vd okov m*db3mn8*m1e9mx w95 every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the largernwm dmev9*v 8md k*x91mob3 5o 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 capacjmd /x8qp90v8cnozf ) )p3mfw itor has a capacitance of C. If the area of the plates is doubled and the distance 0d)cnom z x8f/mp)wqp fj89v3 between the plates 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 parallex.nsse.lv k ps.av(xh cr28wg 6zl;+9l-plate capacitor fully and then is removed. The plates els a .x2+(8zh9psxv g.6.kvl;cswn r 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 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 do /ek1.l(a6d.b*2wxx qli, e +hmhqhgiven capacitor is weakened, the capacitance o d lqe *dxbk6hi,eo/ .lamh+w(q h2x.1f 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/l:ia 1ews;v 1qwm 6qx capacitor are maintained with constant voltage by a bqwae6x wq:1 misl1 /;vattery 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 vodyur o9+ nn fa(.+r;wt ,be3soltage by a battery as they are pulled apart. What happens to the strength of the electric field durinswrafbrtnd9 +nyu+3(., oe; og 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 tz 2otjon(xw if29y8 :she plates of a capacitotxz oswin(9fj2y2: o8 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 plates of a capagrf+3me9r ejx,;2xl d-fj5i3 ghs,dq)nu3 lv citor. What happens gxj5r mjlfr ie,heg d; s93fu3)dq+,-l 3vnx2to 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 pl/6q8;zb kzwu+n 0vy ftj .gr1cates of a capacitor holding a fixed charge. What ha wkzbrt c+1u/q0 ny.8gv;fzj 6ppens 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 capacsu9ws/bj)z:k itor is connected to a battery and becomes fully charged. The capacitor is then disb /: zs9jw)uskconnected, 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 capacito2q/6gsm 7nyaieqnt d,ch6 e3 -r holding a constant charge causes the energy stor dqentqna/e-s7 63i mc,y6h g2ed 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 capacitor carsbvhgp9oi6 ;20t:y n/ m1kk quses the energy stored in that capam1hok q 0it /v6pkrns gb;92:ycitor 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 pon7 e )c st5hsmfo+.,afint B. What is the potential diff.,7mtf+foe )snshc a 5erence 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, whed05n sylry1t91agz kos - o2.rre the potential is -50 V2gs drktlyn5 01 .9r zooy1as-, to point B, where 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 accelerated through an ou yt1et3o-fl58uwn9 ace/q+electric potential difference of 500 V. Whaeu-q3 ce+t olt9f15u/o n8aywt 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 rest, is accelerated through an elefo-y) v0 )3ne zc8xojsctric potential difference of 500 V. What is the speed of the0e f so-vozc8)xyn )j3 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 differe-zu 3c .n zrln-ovnq81nce of 1200 V. What speed dlu-v-n.cz1 no n3r8zqoes 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.s- /e oo.pwv,w0 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 potential 8mem7, xb 6cu1l . 7jjebq3erfdifference of 500 V. Whbq81 m b3xcle eu.fmr,je77j 6at is the velocity 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 rmza-u+9 brix-f 2l 1ay 15bwn 7osr8saest through a potential difference, and aft-ymaa+i7r8xf9 z o2 bs r51-s1ualnwberward 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 diff4o2hj0 gz- h;xn p:wz mw8bn-pvc0jk-erence between two parallel metal plates separated by 1.0 mm. What is the elec:bozgc k40 -hw0 hwvxnn-mj8j;ppz -2tric 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 qm9 k:qcse59tparallel to the +x axis. If the potential at x q 95stcke:q m9= 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/C6u gp.+.otwwc directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly west 6c .w.tpwug+o 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 eew c4ck.2 8ifdlectric field of magnitude 3.0 V/m. Wfi4c e2.8 dwkchat 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 byg / cj;eb27 (.tsduhx,mglvk4 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 thbulh m;s7ce gj 4.kxgt(2d ,/ve 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 12-V battery. n,3daugr zn x q;0e1k4 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, hona0d1ek,3gzr4xq ;u nw 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 0.204hmo tb,mvp(;; h xn1l m, are connected to a 12-V battery. An elec ;pt;lob mh( hm14,vxntron 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?

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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 th uu5z+nea0i8,nl 7iuve east. If the voltage measured relative to ground at a given point in the fav +0u,leiz7uu 85n inield is 80 V, what is 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 electric field of 50d -qvz5f t+(d0hc-hxq 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 thevz+h( 0tfdqq-xcdh 5- 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 throug hdqznxba/();5 lk +obh a potential difference of 12 V, it will acquire a kinetic energy (in the abse;z d o+)5(x/lnqbhakbnce 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 g22umecf 5r 8rp4*kqhdistance 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 lr 9ty -yu0zqtv,592rvenjqwnv )xfm.d/s74 meter stick. Find the electrical potential for the cent5f0.j9qswuyry9vxzlvn7e n2qmt- rv t d ,/4)er of the 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) and a -2.0-nC charge is at (3.0 m, 0). d*2 3zam rsm;n*1oap mmq: .mjIf the potential is taken to be zero at infinity, what is the electric potential amnamza*rjm3 p1om*q;. ms:2d t 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 charqb /csx h s)(h44k*pumge is at (3.0 m, 0). If the potential is taken to be zero at/cm*bxkq) u4h (hsp4 s infinity, 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 is apba c /e5-c8hh9otqqm ,qx9r +t (3.0 m, 0). If the potentirxch 9qota +c,8/hq-p5 qemb 9al is taken to be zero at infinity, what 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 artzxxyhxd-p9g f1m6;c5, 8 tu (9xhkqee placed at the corners of a rectangle of sides a and b. What is the potentiac968 mxexh;zkt,f 1hyt pug (5q- dx9xl 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*0ds61j8( :hhjjz im-pib tm rnally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute poteni16zrmjd8s0j i hj( mphb-*:ttial 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.k0rt. wq.aem5 -yrdb , 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 necessaryp2dj ag66 hb5y to place three charges, each of 2.0 mC, at the corners of an equilateral triangle of side 2.0 y6 bpg5d26a jhcm?

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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 w./xx+f q.tfva hen it is charged to 10vq.f xx.t+a f/0 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 plate )bs;*lt5uz .uv o6dnms 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 wf k-si k)kv53go5, aunith air, and the plates are separated by 0.050 mm. If the capacitanceufo 5nak5 ,vk)-3sgki 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 platepx 2q cxo/dhj .kb3u3 bd(hr5.s 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. tn(78drk/s w1-6vswi meu0fb If the potential difference between the plates is 2000 V, with the top plate at the higher potential, whatk0-6/(enius tr fmv 8dwbs17w 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 conn3d0okck8 ibakfa.r*5 ected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How muc3ka 50oa *ikfkbd.8rch 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. How much en /o62p5 ayktjwj/pp9h ergy is stored in the capacitor? ppt2/y6h9/5jwp oajk

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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 capap d646i6xkmpu 3 h2ezwgqw)6acitor. What is the energy stored in the capacitorwgp)4id h z66kpwqu a me6x362?

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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 is connected .lqn4wupb ;5hto a 12.q;5n.w upb lh40-V battery. How much work 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 0 /gy:u87cdv ny(v lncso 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 pr wjr*nfns w:au3)1u,c ddt:zy)tv. +lates 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 conqn0-bwdg4.yl9sr+ lqidf2 l)sists 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 consists of pdh6r5o qp*v o+lates 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 qn;;o b46m;cvx lee0swith 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 capa . 7v-/tznj r tbefs/uh3ka-i.;lpcy+citor 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 battery and becomes fully.)xqb jyl k*yflpl2/0 charged. The battery is removed and a slab of dielectric that completely fills the s)l0 p fklyq bxl*2/.jypace 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 8y*eh3;ns 7/ukoc+-h +xch0 owgznbz connected to 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 capacitor'ybhn oxc wek+-z;uz*7+cg/nh 0 h38sos plates after the slab is inserted?

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