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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 cgi640h o62/gkct02mlgjbpx not 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 myy -p (zketxoyt5-72is 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;sqfv.nkzf+ - a:3jur surroundings. Object A has a net charge of excess electrons. Object B is grounded-qr;u na.v:k j+ 3szff. 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 6qhorr++oqrfk0v*p 1 the direction 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 9zl(t+titu twu 46p ;jin a direction 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 ple;qntr*1 ob3cxj,p yk23nby : aced 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 frdjdv74nxm3 a;om rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new sp4m j3d;anx7 dveed 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 sau,k5k:.y kh+qsw/ mb p (ufer,me 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 surf77 ubjk+fycfw2v8o9d ctw) ,oace.w2otfckc 79 ,o 7uyw8df) jb+v

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mr ).kdu ) 4d 8ioqoo8gec8is7r2)lflrust 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 thejhv5/.:9 c0fwh x flh.kg0i6e:ejpuk electron as a result of moving through a potential difference of one volt is referred .i9kjw: /h 5fjgh0hepule0kv:6 x.c fto 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 sf6v0yrhhbfv ,h ul*+h i6p93of

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresponds;rk7jnpwyxrf 816k )eo t 5z0x 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 is 10tu+o(v* k/ imn0 V. What is the absolut(uvkn*+/oit m e 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 potentialuz) i -le1:k si:r/q61pbmzzy at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute poten1:z)m 1rl/6p s-uizb zqy:ekitial 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 e 015wabp eyy.pb d:jf7xact 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 yb0j1d5wf.p bae 7py: 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 i bcno+m m4jx*0d 7yd0ps located at one of the square's corners. What is the absolute potential at the square's center when pmb40y7jx on d*m+cd0 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 always0adkaifk ff *ua8(f8 8 consist 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 w64,yua2)jo1l hi o xra

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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 everqq-ikjze 2kn3)+fpkl 3q,6 cry respect except that one has twice the plate area of the other. If the smaller capacitor has capacefkk23 ,r+k qqj3icq6 zn-lp )itance 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 capac/w k1;j(*j;rss iebaditor has a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the newi/( 1jse*;sbwk;ra jd 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 pa0hvl 7kwwihlg zx;+0i8vg:w+34iod z rallel-plate capacitor fully and then is removed. The platk047+ g h 8; vwoiwxv0:wzg+3iizdllhes 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 plates6 cblz v5sir-/ of a given capacitor is weakened, the capacitance of that capa-b65szi lc /rvcitor

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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 mainta8 p6 ln6;he.2 zmu -t.gtq+vnrxxm+kgined with constant voltage by a battery as they are pulled ap+t6.ghgurp.qmm tx;+2ke-z n6v x8lnart. 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 voltageqsx )n g)u-sw8 by a battery as they are pulled apart. What happ)gn-u s )qsxw8ens 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 a -,;x+ornm rpe685 uerunznr njbo -;;capauzn+ronem;x6nj,8 ;5po-;rrer ubn-citor.
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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 n ux:rf* d.2;xjz2sjvbetween the plates of a capacitor. What z2jxv s2 *fj:ru; .dxnhappens 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 )gg pwfi 6:/roy4dg2 ybetween the plates of a capacitor holding a fixed charge. What happens to the electric field between the plg)pyd/ rg y2 :wi4gfo6ates?

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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 connectk9+fffr e-hse y ),+uged to a battery and becomes fully charged. The capacitor is then disconnected, and the separation fu+-rfs9ekf h ),eg+ybetween 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 holding a constant chargzwwa;+ ai -r*be causes the energy stored in th br+-a;za ww*iat 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 ce,ttid:j f10k k.tw+p auses the energy stored in that capacitor idt p+0ktwj,: 1fekt. 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 3ck0vt pn uh6:charge from point A to point B. What is the potent3t u6vkn0 cph:ial difference 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 ecl,i*5i,y f uyth)0.w l2qpwqlectron from point A, where the potential is -50 V, to poinlyutf h2q.w,,l0wicy p *) q5it 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 thr.sm pgsu mjt+m8,vr02ough an electric potential difference of 500 V. What is the kinetic enmp ,v 2t.u 8msjg+s0mrergy 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 anhxol0ay,b/ ) lkd2jt2 electric potential difference of 500 V. What is the speed of the2/tj l ohl,a by)k2xd0 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 pzpzpw1s,+- ba potential difference of 1200 V. What speed does it acquire1w- pzppzbs ,+?

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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 mowztivzkbs vkl/ :(51 .ving $8.5 \times 10^{18} \; electrons$?

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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 v j703busy2yu2hkr t,a potential difference of 500 V. What is the velocity of ty7 3s2uhuvjt0 2rb,ykhe 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 2;ojx z2e k-k9s2 av3ah0 mC. 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 ; 9ka- hks22e3jv oaxzpotential 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 betwees8zu o .bsir(up+/;*ei ik4ioe8je a;n two parallel metal plates separated by 1.0 mm. What is the electric field betwe ub(i ;.pue/48ker+o* ;a zi8eiisjo sen 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 fielwez 501 dvferku)x65e d, with a magnitude of 500 V/m, is directed parallel to the +x a f)ewev1e d5xr056u zkxis. If 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 directedp 6vbnhxt.l 6) 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 di.)nt 6lhpbx6vrectly 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 magnip2w56zs e x*qnu)f/ck gb(we rrx04*itude 3.0 V/m. What is0nzp( xx r6 r)w2*/4i*ew qk5ce ubsgf 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 bap8ipbih90 s*j.ck 8l.uxy n*o bi a+s)ttery. An electron released from rest at a location 0.10 m from the negai+blu. 8b8aoh si0 j sxc) yiknp9p**.tive 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, are connected to a 12-V batterxzh. q b-fkx;-q8t ;)tnwa2 qxy. An electron released from rest at a location 0.10 ma x;w-bt qxhnxqftk;z 2q8.-) 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, are connected to a 12-V bpg-lueck ;xax 8(*n.j8bo yc +attery. 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*cnl. x+ypa;e( kb -uc x8og8j 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 el2jr/fg 7rg fy+0l hge5ectric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in trhg5 g0fyg/7 lr2efj+he field 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 50 N/C directed toward the east.0fdwjvet 1/ dih88 5twi2h by6 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 d80i81b wwf/tv6t5djhiy eh2 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 diffexd6;g 6el x2ddrence of 12 V, it will acquire a kinetic energy (i6g lex6d2;dd xn 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 d2 rwyza,zc;,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 t2k*/x rrt38egvc(j n g bd:v(,35wjlm evs9w mhe ends of a meter stick. Find the electrical potential for the center of the meter stick3*9lc eg8vdx3tv/k vj(r 2br,snmwm:5ejwg ( .

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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) anz t -q84xmvp-y*sk(oeol d93z jfk u(5d a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the 4sjz8mfvlq-t(xd39* op( ozy euk-k5electric 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 -2.0-nC charge is atpf6kgn6beuv99 *vf p/ (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 point (*9e ffp9u vvkng6p6b/ 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 (3.0 m, 0)-yf s3 ):ikr jb8)0lzh :zzqyk. If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC c8:hy3i z kzrlf:bq0jz))s -k yharge 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 corns h2oh x-e0o6z;paki;ers of a rectangle of sides a and b. What is the potential at o; a2;o6z hk0hsexi p-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 placmp wo r/n;(*te g;z gj;pq(7vytx7c5xed in two diagonally opposite corners. In the othext* (q;nwg(p ozecg5 ;;vy7jm/pr 7x tr 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 (c.ylb+wxbwjz,j .w*)xharge +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 mC, ah52;3b6n.drrdoz ioyt the corners of an equilateral triangle of side 2.0rohb32 56nyid.z rod; 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 2.0r,eyjao0j sk -e )5xm;-mF capacitor when it is charged to 100o jmx ay)0s,5j-; eker 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 ofp, pr /9e ark4l87rymr 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, and the pladx 4fch+m5p f) i8fjok1p ,n,etes are separated by 0.050 mm. If thk4 8fe hx1difn+j,of)cp5,m pe 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 hmpt2x 94 5m7vmg -*e-wqlpbejas 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 the potential h;*3jcr:jj 34q hyi 49anf zxmdifference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between the platexf acz:3j qj94hjy34 hinm;r*s?

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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 connected84 :u9vw+oz.glljqhkym )oa 3 across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additionoy+j qml :aw3kl huzv ).8o49gal 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 pla ,/toyv/+ce xd bm6;eaced on a 15 mF capacitor. How much energy is stored in the va+tee;,dx/ my/b oc6capacitor?

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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 stor ylc3iqgsn9 be1aq84 ;ed in the capacitn gls9 qe14a3qybi c8;or?

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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 218qquxrb 5e kvz/sw2 flows onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging tq z25uex2kvqr 1 8/wsbhis 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 chargedolj r:ea(l8rei- dtp0( bu-g - 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 consists of pm 8.xodjfmdte6 v9q0iaj/ idn219fc5lates 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 capao0m,sc80y ktgg ze ha/*k(su 7citor 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 consists of plats3*e ()yuxwb lhayz- il5 j7nxoe7s/,es 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 18pssly3:w v,y*4r hkj-d gf c()acvqis constructed 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 constructed with plate area of 7 sq1fm ijt2v0wr*8cx$0.40 \; m^{2}$ 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 chargetefn::q.lml)dg3s g0a; 1d;datp6 swd. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted.g.t1 edwng) lpsamqdd;: f6ls0a:;t3 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 fully charged. - wzy 23xkvjo.The battery is removed and a slab of dielectric that completely fiw3 2yx vokzj.-lls 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 plates after the slab is inserted?

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