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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 a vector?ol a/mhf 8z37difz8,ctt4 3nu

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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 i+xg 4p mf1u,:gemz k/:w/x oszs 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 suai 3 ;x4x9xmmsrroundings. Object A has a mxa;xm4xsi39 net charge of excess electrons. 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 of the electw./fwet 1 km+xric 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 thbb*/4s2lb beoy e9ks j( j,x3he 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 sphere. Thenh3p blaaw96qda , a7+y

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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 nipl9mf9 ,z0m is accelerated 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 speei099l z,nm mfpd 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 sa-tv*.ovft y c4me 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 equdx 6x:j- k(natipotential surface. (:j-nxa6xdk t

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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 9e8iqim0 b 8mjbe

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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 the74g6e/rb h8.u ivkeyi61 acbf electron as a result of moving through a potential dif1y gfe ci7r /8.ka4hb6vibu6e ference 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 unixd1 117u q,rxi / oxej6/ddolwt 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 corrd 35d mcb-s4pt( q/cmmesponds 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 pointki c + ptrv+z)yyehw/lqb-g- .,q+ emk4;vw ;w charge is 100 V. What is the absolute p-+myvr wqwge4yklz;b,k qc +w;.+t-i he) v/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 d o s0pe)4+pajewsb2 .fistance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m awaypb ajo 4p)we0f+ss2 e. 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 oz8m7znb81mrtzl9 d 1zf 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 squar 1bzmnrlz1 88 z97ztmde'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 o(ybky ma h rvb,fz30(3(cwk(yf 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 ab 3yb((3c0, f(yz kmy vhkarw(t 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 at ,pz/, 6njpo hmsvc*8eho99 v1fn-eof 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 6au0r3kis-u ois 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 respectr gmcn -rrxdb,qn e4 2/r:;g7e9t/f tj except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, enr; c qntr,: t2f-/drj7rb mg gxe9/4the 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 c a 8ua2jk qlt(wzqq0+3apacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is tqa t8la+23uwz(0q j kqhe 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 fullt6fskk 3k g22by and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the ab3 f 22kg6ksktmount 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 0tvv:-syf wddiw6-b7 a given capacitor is weakened, the capacitance of that ca -6ws- vbd7f0twy:vidpacitor

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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 parall0iza7v)wb.jg5jwx 64 v;cyu v el-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During j0 ;6w ia7vbzv.cwv g u5jy4x)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 capaciyu*4js87 j qbftor are maintained with constant voltage by a battery as they are 7qs*jub4j f 8ypulled 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 platbc n lazr u86t l8a (brb61/j9smy68ipes of a capaci( yru6c8ll188a9bmna6 z tp rjbb/is6tor.
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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 betixo5xr1t) dp ( i;k4 -rrcei)shx**jhween the plates of a capacitor. What happens to the ch1*i;)r cs4o-5kxd (jptix eh ri*x)r apacitance?

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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 wln 93dqy3 0k7)s1hwcb a2qqwwt,d;*yg b7 by between the plates of a capacitor holding a fixyg*h)s blnkb1w7q03b9d3qw 7y wd ;c2tawqy,ed charge. What happens 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 capacitor is connecte w2cebbl/s.p0d to a battery and becomes fully charged. The capacitor is then disconnected, and tp/eb wlb.s0 c2he 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 a4l,o- clfc0ja ur:)lk capacitor holding a constant charge causes the energy stc)rolj0 : a,ll -fuk4cored 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 gq)r fx k;yav9fuzsy/,b 79n2a given capacitor causes the energy stored in that capacitor9 ),qnx/ yb;zakfsgvf 729ryu 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 fromc5buq;vf9s6z* h a8kp40osiy lel+c4 point A to point B. What is thz p;h8*6okybi4 qe9l +u4 l0a fscvs5ce potential 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 elecr:ps/2 8z(ca o.tr omqj6zx/o0s4e wbhc8.hftron from point A, where the potential is -50 V, to point B, where the potential is +50 V, :tr/s. r ./ 4 oo88haoeqwbzz6cx 0js(c 2mfhpis

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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 throug wmn59zxz17ww h an electric potential difference of 500z w9xnw5z 71mw V. 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 (-gasc3nc9bo ( nmu t9through an electric potential difference of 500 V. What is the spsmtnb g-c3c9u 9(noa(eed 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, a proton falls through a potent+;ybodh s91 ndlp 0o)rial difference of 1200 V. What speed does it acqo1pdn09o; )dy sh+rlb 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 8 nwb/jns2n-52xqjbsV 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 th/ad9 3s8l mnj1wh6 enqrough a potential difference of 500 V. Wha /jn8qmwl6hsa 93 1endt 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 r3+rx1y*vh ela 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 potential die3yrv + x1hl*rfference?

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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 between hq c-88gq3cis 1knul/ two parallel metal plates separated by 1.0 mm. What is the electric field bek3 cc l/81u-nqqgi 8hstween 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, wgc*yb-0fq e +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 potentialq +*f -y0gwecb 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 rl*mne ju( h()N/C directed toward the east. If the voltage measured relle *n )(rmjh(uative 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 my;o ph5 a95zou along the direction of an electric field of magnitude 3.0 V/m. What is the 5hza opo9u5;y 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 conne7o/kmhp2g .4p4aszlscted 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 the positive plate, what is the potential differenl42ps akpszh mgo. /47ce 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, separz, u 9tlll2 lu/p9ti o7)ebr;cated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 l9lc ,;p/2bu lrt)i79 ezlu otm 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 c8 4dwaja/* wk7:yyb zronnected to a 12-V battery. An e wb y/8kwraydj4a*z7: lectron 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 nr8ei6npg 3wii-ge6 6t0w k:ifield of 50 N/C directed toward the east. If the voltage measured8ig6wkwn -: 3ptg rn6iie60ei relative 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 towareu0/ot48 c( bvqjrnc+)it0 av d the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage )e4uj8va r t0c tb(cvio0+n/qat 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 difference of 12 V, it will aci,dwv b t7t2/xquire a kinetic energy (in the absence of frictiotd/ 2t 7vbxw,in) 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 t(*0nc ns5kir 4wib g+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 ar0qq r9 r4p b .9qvam4mi6)vzdge at the ends of a meter stick. Find the electrical potential for the center of the metzrb9img6maqv40.d qq4 )vrp9 er 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-nCxv3hyqdn83 o2 charge is at (3.0 m, 0). If the potential is taken to be zero at infinit8y oqh33x v2dny, 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 p0n,f3 3u- nfuttffu-(3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of p33,u-uf 0f nfn utf-ta 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,zb8,jqzbl:8mq*: :q5see8m7dc jq ;x sn n,hr 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero am;q8d 5 es 8 n:slrjqqbjmh, qc*8nzze7:b,:xt 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 are placed at the d gvne,4 e0yve99er 9jcorners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 29,90gd j4eeerne9 yv v.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 pno 7k uyjolhu4-k-o/ +laced in two diagonally opposite corners. In the other two corners are placed hukujk o/l7o+-o4n y -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 c+6c+y2k x08gxxxdc zharge +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 c(hg4 6xgcx3 2wce,eau harges, each of 2.0 mC, at the corners of an equilateral triangle of side 2.0 cm?aex642 x gg3cu,( echw

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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 ins0 +csj2m7vaes zvpz,i :y..s charged to 100 :yc. +zs .snm0vi2pjav,se 7zV?

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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 ofv82ey08try*ip)afbj r 9 1lay 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 t(gf5u66( ynhmv2;.l n7 ct7afyye ofghe plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is t66g yn2 ((y5 n7oaec huf;mgvlyf.f7the 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 ar tcq73;vrbcx8ved,v+t rb q1 6ea $0.20 \; m^{2}$ 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 capacx k;(2r: fju4rk9angcitor has a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electricr x ak:ur;(g2jcf4kn9 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 batt p6x.niqq ,1grryec),ery fully charges the cap qcpgix).n,yqr1r e,6acitor, 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 capacitorghb ie ei9z.+0kyvl,p+a,)xs. How much energy is stored in the ii s.+ hakx,p)9 zv0g,b+yl eecapacitor?

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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 e sq-8gfj8c/bc nergy stored in the capaci cqfg/ jbs-88ctor?

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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 plmp79;ac3 aq6h;tno qfates of a capacitor when it is connected to a 12.0-V battery. How much work was done in chargingatq;haq9 ;f6o3pcm7 n 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 thatjm.6 7 sq tatrmnd4g0; 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 areaufdir3*i,:qmov ;- kj $1.5 \times 10^{-4} \; m^{2}$ 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 uwx72z )7 eqtoplates 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 p3-ng8/gj 8ofynho: aof 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 constructed with pla yz+29dd.axwtdb a)y8r vkb)2te 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 witi9qi-9h 5 bi6jbv u9o5.np2yjqofe *fh 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 becomb(5( 2j:pqv dt/hxmlv ap16 sces fully charged. The battery is removed and a slab of dielectric txvv m2(1la6bj:q(dpp h /s 5cthat 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 a jn z khz7 i*w-vnx7 c*f wn:dlr-o,8z-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 dielectricn ,7hv- *zln8w zzdx*-j:iwo- frcn7k 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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