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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 veyv qk:pl*) *u;zixn g; wx)o7hctor?

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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 is a-s n f ifj;yn9j-p4*gh

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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 i b7*dzz9 a*6ciwq*xim nsulated from their surroundings. Object A has a net chac9z7i*6wx qibamd*z *rge 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 dirbr3/0gy31wx vti b5q01lhv3w a i- tfdection 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 h k) rsuwhkc6f ak b+5c:9ta51a 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 placed on a h vt.3ae2t c*btollow 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 f 8brq9vlxktst 0 98xl )djl,.nrom rest to a speed v by a 500 V potential difference. If thl lnjr)tl9 q8k 9x,v8.tb0 dsxe potential difference is changed to 2000 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 are at the same potentiaa m9 ri(gpuu*8l 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 movemmy ud)0e, w0+mr dsc7n93blgd from point A to point B along an equipotential surfacdd)bm397en m gws 0l r0ucm+,ye.

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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 n fj-s5-gr h0gbe

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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 8(//a zw;tlkt ug0b* f yeadl6to that on the electron as a result of movt0 lw tyk;aud 6g(ba//8zfl *eing through a 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 oftv(rnh51 m(sy 66 xqh/y3azvs

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt cor8by t8m,a3f1y9 dj k7fkahz )jresponds 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 8*ewwgz1 wf ku7jv, l7.hhhm9positive point charge is 100 V. , jfhke789zmw .h w hgvuw*l17 What is the 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 distance of j,5h;aiqokyuc8)j zoc- g t8+2.0 m from a negative point charge is -100 V. What is qo i)8c 5-t+uj8kgo;cjhyza, 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 cxwv/sk*k t3) i ih3a8tharge of +Q is located at one of the square's corners. What is the absolute potential at the square's c tixkvsaw 8)kt33/*ihenter 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 the25p.o pzxl 7k it:xps5ca1a) k:ctc*n center of a square is 3.0 V when a charge of +Q is located at one of ::lt* )pz1ctins oxkc27p kxaa .55c pthe 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 ofp p8)xk7rm6k)c9 j hff8n fa)c 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 voltrcrz. k:vs r85 is 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 idenx3dtu yug6dbr.(z3h,sj1k2 v tical in every respect except that one has twice the plate arevg(h2bkud urxy1.j ,zt3ds 3 6a 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 capac90cvb/r fwr- mitor has a capacitance of C. If the area of the plates is doubled and the distance between c0rr /b9mwvf-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 fusdyxnb o15dxb. ../ ps2sxu 0f,7lhttlly and then is removed. The plates 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 pfbh/o 2p x05n .tduxt1ys.d7 sl.,bsxlates 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 capacitor 3f,yspvo pjp1. ei)ej;:6svd is weakened, the capacitance of that co;.seep jd36y) vjp p siv,f1:apacitor

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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-phxjym)jok u e-: wv;49late capacitor are maintained with constant voltage by a battery as they are pux) 4m9:yu ejk j-w;ovhlled 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 c4fw w:r )v84bpbl1wpnapacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field p)w bvf4 pnlrb 4:w8w1during 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 clsc9;ht 6 m3dh0o*cc8/x blwtapacitomc h t;ls6h8xl /3cb 9tocdw0*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 pln2(5cnyu zg +aper is placed between the plates of a capacitor. What happens to the capac+n 2(zy uglc5nitance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material -9btbh4 (ci x;xx.3 yenn8htuw b0l1osuch as paper is placed between the plates of a capacitor holding a fixed charge. Wh txhhi 0nnxyx81;cb lte3bu( . -4wob9at 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 xmr :ej08x sln+wr ;77vm gat1is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is invn8;1r+ s0lxtwem x m7gj a:r7creased 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 charge caul28r;m w3rllm ses the energyrlll2mrw8 m3; stored 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 acrossoy)ix2b+ a mqsx yn9(/ a given capacitor causes the energy stored in that capacitor t(na x+yx)bsi o9yq2/mo

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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 poc*6ym stx3h 8dt jg;8jint A to point B. What is the potential difference between ct*8 yj83;m xgjsh6t dpoints 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 poten lv)dwfnr8h8 x8lwml+ e;l/o:tial is -50 V, to point B, where the potential is +50 V, islll:n+lxh8o/8e v wfm;dr8w)

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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 accelerf7uwh/( ebpz c1b2r t8vxp +ok02ta(k ated through an electric potential differencek 2ut(ea /pbohxk(0wb+78zvp2fcr1 t of 500 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 z+ z qr m7643swfc+tjyi7r2oq rest, is accelerated through an electric potential difference of 500 V. What is the speed oftwrq +z6mcfy2+ qzr37o4j7i s 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 potential difference of 12+pv r5vva o;nno. -,zs00 V. What speed does it srovzv+,;vn-nop 5a .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 moviby7 lcq4 ex5vemlcp 4d)/5,0el s3lilng $8.5 \times 10^{18} \; electrons$?

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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.8/d jgy5u8dfr- dga bs9l(a selerated through a potential difference of 500 V. What is the velocity of the electron afa8/ldu y-gdgbr9(5 a f8.jd ssterward?

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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 id3xe m, jcz1/ws accelerated from rest through a potential difference, and afterward t1 w3jzm/ ,edcxhe 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 difference between two paka hc 2zxwm8169ma 2 87dsicyps0f; usrallel metal plates separated by 1.0 mm. What im9 2dy88c7a6xh s2a01ws p s;f icukzms 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, wia l: +kfdh(f52)jf8 awtnl k1 d*ekhi-th 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 h1:f+k-we*5 df)ak8j la2 l inth d(kfpotential 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 directed toward th2a4x*yi f xsn44-etbde 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 wesayx4si 2*- be4dftx n4t 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 electrix 6rk z2a1zt mn4(jdt:g7t2z q*za*ztc field of magnitude 3.0 V/m. What62 a7*mtz d(qzxzzzka214 :jtt rn* gt 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 by 0.20 m, are connected to a 12-kviy c ;zdptp:0*n6w-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arpiyvk pwzc -0n *:dt6;rives 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,+aptdn ,e hi*7iu ,oe 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives,honpt*,idee+, i u7a 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 u)x*oot agkwe5, n9*o12-V battery. An electroeao*,u *ko9w)tx ogn5 n 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 the east. 5xqa:l2yv/j yv8 ek 0s If the voltage measured :y/k8s50l qvayvx e2jrelative 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 dirywpu rb y8kb54vcl70,ected toward the east. If the voltage measured relative to ground at a given point in the field is 0pbvy7 5r8w l4ckb,yu 80 V, what is 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 difference of 12 V, it winwewe cz n 3gbyov4g/s*w7wt2z15ygz3 (4 u w)ll acquire a kinetic energy (in the absence2wg4yv4bz gwc s3/ze1u*o3w(wgn)ty 57wn z e 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 :v 8hzq5n;k,t dl jvf*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 stick. Find the electrical oc a)u4k(:.d:fziep xpotential for the ceid cka)u:f .p x(ze4o:nter 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 cha a4brr.a0ufesq m27 y:rge is at (3.0 m, 0). If the potentialafu: 7sr ar2.emy4qb0 is taken 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 mwpaax7 skv0 i4 72eprm5*( sem, 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 (0, 4.0 w mr ep2v 5p4xsai70s m*e(7kam)?

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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, 0j4a 8z k,vg76dxkaw1i). If the potential is taken to be zero at infinity, what is the work required to b v,wd kj86x7k g4i1azaring 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 corners of a rr9-y p )xeor-x:xv;qd/ sl s(oectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.0 cm?q-sl:do/ 9r x-(v);sxyep ox r

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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. m 3b; tc/kf/wmhsld4, Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absomm ;lb3skh tf/w/,d 4clute 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 +v3pqw:xzn :5pfki+ e +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 placzy+un t,s l5fsc.0 y:ze three charges, each of 2.0 mC, at the corners of an equilateral triangle of side 5tsz: ys.n0y,czlu+f 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 whewsgi02zzlu 7 +n it is charged to 10i+ zglsz702wu 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 plates of zis/ gsicfltjfp q (v*.18zo0s2gd ::/d ozm: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 are separatdu fq/;m4m m9-l+ paf/ g1xllded by 0.050 mm. lgx 4; dp1maf/uqd-9 lfl/m+m If the 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 has i(q5)5rnjm hm/ls h q5plates 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 capa04f v f(lnuh;jcitor has a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, withhvu n ;l(jf40f 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 conne7tj r+wil(bjaltn8 *: cted 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 additional charge flows from the batt ta*jwr j(i+tl l7bn8:ery, 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 energy isjbghr ar,jn1u8t6xd;c i*q x /:f2f u/ stored in the capacird/jj1f;hbr 8q:uxn /*itc 2u6afgx,tor?

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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 stored ish2fh+.apm,4r o5myb n the capacito4hh+pr b2ym f5a ,os.mr?

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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 connez,j5d vvo+5 i unc2/wacted to a 12.0-V battery. How much work was ,5iwo+nvzd vac2 u /j5done 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 i k wvr yumw7;h8q)w /tz6f:fp1s charged 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 d oht *0,n ,lencqo+d(,wex6z 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 capaci4sc8z, gs+vz-s*h2ps bvk y b.tor 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 capacitjg8.xprthlundg yo v/06 f2g2dav (42or 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 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 v vn8ditmyzo81o.i e:j3j(,rte 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 ohi m) q0xe ),k ,lc+9awq3mfofubxee7 6 u+yn9f $0.40 \; m^{2}$ 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 fuu ql 8)8wbub*jlly charged. The battery b8lw8bu j uq)*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 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 x* b oy, ,*wmfpol av8*daghn77ax4,m a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space betwhm ,74gwb,mny*8x l*a ,ovo7*fax p adeen 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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