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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 i i x5hi1bm2/l8t)pbea 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 iseym*k -b0bhdag/ :fw+u(4o nb 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 ins h2t/t993obp)tj wtdftd+ oxlcu;/, bulated from their surroundings. Object A has a net charge of excess electrons9du3; tt+ 9 bobo td/2/xtwpf)c ,ljht. Object B is grounded. 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 direction cfnibhbml)2 e)8 . 4ypof 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 41p6 i( ,i sfnwh*ttw3cfcz.f 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 condu(dj2e 3 jrl0ypcting 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 accuz5kbe1 mi*s 8elerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed oe15 8*s zukimbf 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 referre0lo a w9elp(5 z6p/.)rff xpdfd 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 equiead66*ea p *otpotential surface.at*ao6 e*6e dp

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfac ii7h1-k9hy9 . z qn5e2rtz3hrjcb1rc e 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 carrythjm :)0yi gg+w2zhqae k14i 3ing a charge equal to that on the electron as a result of moving through +g0a12 ki mwje yzt4qh)3i: gha 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 obvqyl 2r m+y w9/,xu b;aa:1vqvo71 inf

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt cok9cf)x ;s k8usrresponds 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 ke f( -l(n)iexpoint charge is 100 V. What is thi(-flen(xk ) ee 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 dexf6c ,l3*l/6kb+qhojmer: gf 6 on o-istance of 2.0 m from a negative point charge is -100 V. What is the abson: f/emolo-c,j* r3g6 oxqh +efb6lk 6lute 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 them)7,l/ xguuh o,gy;7 ffc :zuovhw6q * exact 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 each of the ozh l), ,g/wh gxf7:oofmuq6 cyvu 7;u*ther 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 3.0hxwm),ev*xr-0sce az w/ ol0 ) V when a charge of +Q is located at one of the square's corners. What is the absolute potenti *0ch rw)lv-zmas)wxx/oe 0e,al 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 chargesvh5wx4d*5nsw8j0pv kk- :rrs 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 is1ih 9 d kr5ug5fq9kf:e 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 identi 0g,v :byuqi.wcal in every respect except that one has twice the plate area of the other. If the smaller capacit u:qig,ywb0. vor 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 capacituno5ryt ln7 56ance of C. If the area of the plates is doubled and the diyn655tu lor n7stance 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 capacitor fully and then is removed.enc1 hyj)l d.6 The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remah y. e6c1nlj)dins 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 plaj.-et62 glf oetes of a given capacitor is weakened, the capacitance of that.fetloje6-2 g 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 wa y8+qf:exocps;r3m +ith constant voltage by a battery as they are pulled apart. During this process, the amount of charge o8 +yrpaqo;xc+3 fe: msn 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 parallen by r7;42gtwpl-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the elgr yt2pw bn74;ectric 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 ia9ey1yc5m 1;z n:qalq1,-xyi prpf+between the plates of a capacpma -11 5y :i iqycpr1nf,ale9zqy;+xitor.
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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 t5,at a tao8iq wn.-lz:he plates of a capacitor. What happens wa-8z:5. ito, qtna alto 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 placb fkpf2uytlq8 (;x6 :xed between the plates of a capacitor holding a fixed charge. What happens to the electric f(y6bl2fktpux x8q:; f ield 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 cap xv,ypcdt*nl5*om )a :5aya a(acitor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separat,v a : apy5t5an)dyl** xc(aomion 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 holding a constant charg*jluy1 .pk6dhw,ry.q rlww(2 fhf3o1e causes the energy stored in th .1w, kjwdlfyfp2 (*1wyolr.h3uqh6 rat 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 across6 +se*kmeax6x a given capacitor causes the energy stored in that capacitor x6*a x+emke6sto

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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 charg)qqe ))y z2jn*y2pkhm e from point A to point B. What is the potential difference bqnm)pj q))h22ek*zyyetween 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 potentiagmur )i tc3n60jzh4-v 53uueol is -50 V, to point B, where thenru ij4gt360cuz- eo m3hvu5) 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 as,2f zl6. kggeccelerated through an electric potential difference of 500 V.z sl k6,e.g2gf What 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 electric pojm k gehz,qj4.pd2+m +tential difference of 500 V. What is the speed of the prj+.mp dmq4j ,hk2+egz oton?

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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 difference wkrv; gi)zj *;je 0sf+wqq 84vof 1200 V. What speed does it0 *v kesfj) r;wzj4qg;viwq8 + 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 9.0 V do in movi(j /pwmj6.-cmu)b jk wng $8.5 \times 10^{18} \; electrons$?

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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 thx 0pnva3,d7 worough a potential difference of 500 V. What is the velocity of t,np7xvwoa30d he 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 ih-gq.1 ;nj-hvf njs3 a charge of 20 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 po-h-sf .i1gjjqh ;3vnn tential 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 elec/sj(cx4hp+ uatrical potential difference between two parallel metal plates separated/h(cu 4sjapx + 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 fiwm (34m poj y0xfa ndahf)1t.4eld, with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potent1w)xfatd4 yf.0 3(n 4pma ohmjial 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 fgk. c k/k/b)5ia7ldiptp 4fh1ield of 50 N/C directed toward the east. If the voltage measuredha ikt.gic/ p51db 7k4 lp)fk/ 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 directi/a)ck.zjxc i 8on of an electric field of magnitude 3.0 V/m. What is the change in kinetic ene zajc./cki )8xrgy 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 battel /hmln;4z. lfry. 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 the positive plate, what is the potential difference between the initial and final pointlf/hl;.lm4n z s?

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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 gpf-88jkjg 2d 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 0.050 m from the positive plate, how mu8kpfj2 8dgj g-ch 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,+d ,*q1 erknys are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate,*esr 1q+k ydn. 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 fx1ot h(,c*y -qy nx fxucn480sield of 50 N/C directed toward the east. If the voltage measured relativc x0f ,41*qoxxcnt8 su-h(yyne to 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 towaru2nsn k7qd49vgpe,zltx0 w7/ *w. mm yd the east. If the voltage measured relative to ground at a given point in the field is 80 V, what mg .2e nq*xd nyp9/ 0skmw4tl7,vw7uzis 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 through a potential d.,h20xewl( plt9vlsi ifference of 12 V, it will acquire a kinetic ener p s.tl,i(hxvl0l9e2wgy (in 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 qjp d ,xe: eeeht i7pw(bu y69t8 mre5-b:h8z3a 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 stick. 7qnhl.nmi y)kh0ud6k/, i,jo Find the electrical potential k,0i/n7nqi, h.h6ldyj )omukfor the center 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 x473c5 56u/vl s:sfi4xdu ga*mo kxmncharge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric vx 5gmx/s56ic3us:madx44u7lk o *nf 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,ugdw2 4/ va xfy12bg by:b.ty: 0). If the potential i2bb2gf t1v 4yy:/ydw xg. bua:s taken to be zero at 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) a 6 m:pegcl79hbnd a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinitgce m 9:hblp76y 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 rectangle2y/6n0klri bs c7y9 tg of sides a and b. What isl7 n0/ 6rby2t9kgsy ci the 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 of +4.0 mC are placed in two d7v8(mb/yw( 3b ji9+cbzg d2 uynwssm8iagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential in the square2u7 b/cjwyinbwsm8 (d v3z(8g9bms+y '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 (charge2b z1dfz:*7 dkgm.pzr +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 necesse1s tpny+pn0z ysq 344 er(2daary to place three charges, each of 2.0 mC, at the cornes4yyes r pp 2zanet4d (31q+n0rs of an equilateral 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 is charged uo+ osv:b7m5h qt j; 0whi);rkto 100 ;thq hiks)+ rj5:uoo7bm0; wvV?

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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 of arew(ca 1c4q-v7 savfc aj1.z/sxi3niz 79j-a s ea $0.50 \; m^{2}$ 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 pla22ws/mtr. ;p di;k0owl tt 4bptes are separated by 0.050 mm. If the capacitance is;mtl.0w2wbdok ;i p2p tt/r4 s 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 plates of area wg h:fanl7j36r:9w hn $0.20 \; m^{2}$ 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 separationukfbq8l jml 6f(,6rnga. 6 mu* of 5.0 cm. If the potential difference between the plates is *lb8( kl r6jqf6a.nf6m,ugmu2000 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 b2kzc. :knn7i :bd zdmepd)0/ agza:4* z8 evvgattery fullegaazd z :2k enm)*b0.d::vzz47g8/ pdkcni vy charges the capacitor, the capacitor is immersed in 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. How 14gwzbust,v6)i d.g u much energy is stored in the cast ) u1v4.bg,6wid gzupacitor?

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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 enrd2hkt-gn s6ozd6jz 6 zl2b4,ergy stored in the capacitob2 -4k66g, zz6nj dhrtzds2lor?

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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 fla* h1 l1dseso-ows onto the plates of a capacitor when it is connected to a 12- h11dase*sol.0-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 so tr1maifog)n-mtf x7a7jn yg52 qb)5c 0hat 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 yaqu; xpm:v ugic8.gju5e.6/ e lu9*q 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 consists of plates ofyp1f,t,a 5zla+rd ,.3oihw qjov-2nd 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 area (*k hd76zcf+kkc0dsz ts9y0 a ip yd38$1.5 \times 10^{-4} \; m^{2}$ 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 area of tpi 37 kz7hnsv3o /h4w$0.40 \; m^{2}$ 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 consy 4 sx0of9j0jhtructed 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 charged. T;zu6,m n uok9c1(hb gzhe battery is removed and a slab of dielectric that completely fills the space bek n,uz g6mu;o9hb(zc1 tween 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 batt kj78srav)we*ery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space besvw8eakr)j 7*tween 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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