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习题练习：Physics Unit17: Electric Potential
本习题练习试卷来源于51fly国际课程 (https://51fly.win)， 为试卷打印版，您也可以在网站平台(https://autodiscover.51fly.win/)直接 访问本试卷的在线电子版并查看正确答案与解析，搜藏保存任意题目到收藏集。 访问方法: 平台首页左上角"通过试卷号快速访问"输入试卷号 75，并点击直达试卷；或浏览器地址栏内直接输入本试卷链接 https://autodiscover.51fly.win/test75.html  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。
 作者: physics  发布日期: 2022-08-15 14:49    总分: 75分  得分: _____________

答题人: 游客未登录  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 vector? f/zp2lu 1)wiq 61/ k/ojwbn p;r3hnbj

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombwk 08ayk2ry2 g 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 subfxg z;.f2 -o( orr7fuv mh30lrroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is afv.0u bg;lf fh-7 xorzm3o(r2 t 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 d1 vl4t9vrmcs5 hl +xt,irection 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 dbrst pqw+, yiwc .9m59irection 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 conducting spipchp 62555mvs khj 50s0 wciqhere. 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 a 8 )rqxzhfj2d/ccelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what dx)hf2 rqz /j8will 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 point3p(qb5g/ h mqgs are 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 f+o19m/y e)evh ry4 gjerom point A to point B along an equipotential surfac+ eeomv9yrj4h ye/1)g e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must bf* .0fy6c qgvse

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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 cbi:59/iop-:cb . uur+ zsjep to that on the electron as a result of moving through a potential difference of one / cupbreu9i ozi cb:-ps.5:+ jvolt 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,0lgr 5go.m82bf e9 7t czzaql 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 corrh bbwfj,pvhp :)9g-n (esponds to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potentialvy e(h 176fpaz at a distance of 2.0 m from a positive point charge is 100 V. What is the absolute po(h7efazyvp1 6 tential 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 distavgrmfl :n6osh5k*u m*idg 18.n3zwicc8ts ;5nce of 2.0 m from a negative point charge is -100 V1 :6;sn*.zdugckmv5c5ml ho8i3 sfng8*i wtr . What 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 when a 12+tw*k+khl-)mq y da0oxlp dth u(:pcharge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when ea-)mlkwu dqh*yh++kp2xt0oa p (t :d l1ch 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 potentip ckf8uod9 r;ee 4*w.ral at the center of a square is 3.0 V when a charge of +Q is cpk98dru f w*eore ;4.located at one of the square's corners. What is the absolute potential 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 of two charges th lo tc).vltx30dq,f72 uzy5 ihat 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 ;w( qp4u8s 9 9,jzcyt)s:zzmhsit9bba

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate capu.da9 j7l.sxpacitors are identical in every respect except that one has twice dusp7.l j xa9.the plate area of the other. If 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 platesu5(ob*qg7jz-n j76myjzkbb+ is djbkjgy +6q z*- oj n7m7bzb5(uoubled and the distance 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 parallel-plate capa. c+lwd- cpn:u eqw xtu-uz,,)citor fully and then is removed. The plates are immediately pulled apartxu p) cl:w.,u enu-- t+d,czqw. (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 given cc*nw u2o3td+fi dgo 16apacitor is weakened, the capacitance of t fin1w6d+2c*uo 3gd othat 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-pmjf9- x(-f9-af; ogk qz4 iobrlate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount mibq -o (fgkfj;x4 --fz9oa 9rof 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 const55t6t cfevg .w4j+ep v n cm0*z+p skm*qdm81rant voltage by a +jv5t m mcdr 1psw q*e.nm 5pf68c+zegk0t4v*battery 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 o; ,, 0)wq4clnayc;k omjy(pivf a capacitor.ki;cmcy pjv),q0al4( y, ;onw
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric materiaf q813th+xs ff;+d;nkq;1 ej2u g/cd us(w ymfl such as paper is placed between the plates of a capacitor. What happens to the capaci;fst h(/y8uecgqwf mk; +1 jufd; qn3x2d 1s+ftance?

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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 plat yc7a zvv 9 z2(q:, zj.yr-27gxid ime3w7xyjoes of a capacitor holding a fixed charge. What happens t-ji7 ojv29 me(iyqg z7r:,d32w xz 7a.xyvzcyo 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 co/empwd9 d14;) jz beixzz9(qb nnected to a battery 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 tbdx)e pj(4q1e iwmzd;zb/9z 9 his 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 chargepiwwn+c4 . n8h causes the energy stored in that cap8 hwnpn. +c4wiacitor 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 energy stored *jjo0aivia(+,emkpeo2ol7* in that capacitora*e ij *2 oe+k70,oij (ampovl 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 foa *,k67lpge+ qe gp:xrom point A to point B. What is the potential di q eok,ag6e:pg+7lpx*fference 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 annt .1e3ll* huw,w /yc7q 2izic electron from point A, where the potential is -50 V, to point B, where the potential ilhncw i1ie z7 2w*yc3lu./qt,s +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, isp*xra+ 2 vl*7ulwz47pfr rg8txca /d; accelerated through an electric potential difference of 500 V. What is the kinetic energy of the proto/p x7 ac4u+wz arrl *xtrl 27fpgdv*8;n?

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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 differa::f 1bdg)*ol4ek g.5k jxjpw ence of 500 V. What is the speed of the pejk:g)gjw:. df4*5x kl 1aboproton?

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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 thr5fq4vcwlwq(7 f*qu4b ough a potential difference of 1200 V. What spe *75u 4 4(fvfqbqlqwwced does 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 9hq 2m4e xp.q;r/f/lzz(jer/ x.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 acc,ch04gc4uid7i 0wj rk 3,geryxs4x *celerated through a potential difference of 500 V. What is the velocity of the electron after0rck, swy0xxc344ieugchg*7 4dir, jward?

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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 carrieblka:s495 sg -*p mkizs a charge of 20 mC. The object is accelerated from rest through a potential difference, and afterward the bali bz ml9* 4s-kap5g:skl 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 s 1c;ng 4d v:v +wsyb8lw-ymv1electrical potential difference between two parallel metal plates separatewgvcm1v-nyblw;4s+yds:1 v 8d by 1.0 mm. What 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, is directed parallel tc3my:swmsle 2;l9f 1no the +x axis. If the pom9 wcf1lss;y32:ne lm tential 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 electrgm19 qu dg3c )6wmg)7lr xie3xic field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage 7)3u 6rqdx 3)1gig gew mm9lcxat 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 af oa,q/8qcw4a-dt3fin electric field of magnitude 3.0 V/m. What is the changef-dtq3 q ci,fa4 aow/8 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. wnz ) k4tqwn7b )lqkhe-lt5+8yiw 1i: An elech4tqn z- wil)k 8kwtlw7ybn5q1i)+e: tron released from rest at a 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, are connected to a 12-V battery.0 jsey w*csa.e7jc9l.q (o7fo An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a dia*9( 0j. e.w lc7ysjoeof scq7stance 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, sep8*h;vlpk z )/d 7s0)avb (f2bmzkwndtarated by 0.20 m, are connected to a 12-V battery. An electron released from rest vwsm)z/b ;2dkh*0n kpbl8f7 taz()v dat 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 direc*g : j fjjodz6ol;v:9wo,yu2 ited toward the east. If the voltage measured relative toioyj*j2ogjuwd:, v6z :;o f 9l ground at a given point in the 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. If the h7)ombtxb 6bq88j5yzley v7 5voltage measured relative to ground at a given point in the field is 80 V, what is the hb8zto)7byv q6bm 8 y5e75xljvoltage 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 throulh)i-:m ) tlwtgh a potential difference of 12 V, it will acquire a kinetic energy (in wmi): )hl-tlt 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 potentialgn0;l9xbx0t dnb+b *k 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 the ends of a meter stic62+utic+-1brpn yw kxk. Find the electrical potential for the center of +uwk1xny c 2 b6+-rtpithe 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 j 5zj g:+bak0h-2.0-nC charge is at (3.0 m, 0). If the potential is takj5j zgb+k:ah0en to 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 -2.0-nC charge is at (3.0 m, 0). Ifa( 1d 8cylfenbhp i,,2 the potential is taken to be zero at infinity, wha y1n(a fbi,2 ephc,dl8t 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) adm ).u.ixh7p vnd a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinitm xv.p ihu7d.)y, 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 equa(ob kosj)01 ,mo vo +qi0ugn:xl charge +q are placed at the corners of a rectangle of sides a and b. What is the potential at the go uo1m00i:k ovj(qbn) x+,socenter 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 diagona , cvizz+qzuq 32ezf,p1+au3j lly opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolutez2 qfc zuaz,i3zuje+p,31v+q 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, e*-aufww 7x,jfcty ddd f1(*4mass $6.64 \times 10^{-27} \; kg$) 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 char2bo7d4iedb o*/l o bc9ges, each of 2.0 mC, at the corners of an equilateral triangle of side 2.0 cm o2o bloid9ebc/*7d4 b?

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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 whenmr1*w2n 0/ku h;qdfr hg6eql i85 za/i it is charged to 100 Va* 6rzg0r uh/1;nlq f 82idh/5wkq eim?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitodk6x+b stv1+i: k8oj fh) :nwyr 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 filled with air, and the plates are0jl3fg -f2nuf .bvcq ) separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate area?3jf cn2f0b-)gfv l. uq

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacito(w(hll6z8gn7eq0 3 qdo .jlszr 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 plate separation of 5.0 cm.a owhuke-cd 7f 3fi-at(lo9(9 If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric fieldaolc3kfo -e 97 hw(au(df-9it 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 battery f k e(f+,y;rqnbs/ xal(ully charges the capacitor, the capacitor is immersed in transformer oil,/e+rxak;ysf(l nb(q (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)n7cd xe f)d,v a 15 mF capacitor. How much energy is stored in the capacit)nv, )d7cdx feor?

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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 tenc,og d .tl90e g15qkhe energy stored in the capacitor?ke9no l .gq0c eg1t,5d

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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 conneq3 * o z:irguzo cut3d0;8ln04g8byemcted to a 12.0-V ba ub im:q3uy8o0;ggnez*34r o0c8 tlzdttery. 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 charg7k5mn p6- sad4c n24d4nnfoksed 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 plates of area9wzu4zi)clu4s;ca 0r x0r;iz $1.5 \times 10^{-4} \; m^{2}$ 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 consists of platestie2- :7eykog 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 plates of areaf f688my2m ecc $1.5 \times 10^{-4} \; m^{2}$ 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 capaci a bj/6;)z0hh(aa a3gdsnn(nftor is 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 i; e bzzu )7:tm 4cagjy+df+d.us 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 con-f2x9x:wrm;sdh skf y p:*yi5 nected 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 cx:;m:92 rypy f*5x ihdsks wf-apacitance 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. The7 zr8pnwlf4;r battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a d7pn 8;wzlfrr 4ielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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