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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 followixw0gap9w *8t q +*)o3 glncvving is 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 mptg ff.9x d:s.o4f: iis 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 in mhtk7 yo.6wyqh*l+d *sulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a hwdylq*+hokty6hm * 7 .igher 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 electric fieldr k r;; opewhs..-j)fv

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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 d0g 5ya3o( qpinirection 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 cgxx(+f5c.:wl a/s lk ronducting 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 fn4mum2h akm35*ini j-rom rest to a speed v by a 500 V potential difference. If the potential difference is chanim3m * mi4jnah-5n u2kged 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 aax 95wssvcw s(ip3u97 ll points 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 frovwk p:nns, x,:m point A to point B along an equipotential surfacew,vx:pk,n ns:.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surnbh 4lb)d*l)oi1y+ 9 0hc zdnxrx(m4qface 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 carrying a chal f5m 4.a94 6:we9aoo iioh(slsm4wqhrge equal to that on the electron as a result of moving through a potential difference of one volt is ref9iao4(h9flhe o w4sim .4l:6swom aq5erred 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 t* c/ .fah0jfoa unit 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 corresplh3j.fo )m 2vaonds 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 z3d)nr ;ql(xxh *x2 uycharge is 100 V. What is the absolute potential 4.0 m away from the same point nzlr3y*xx2( ; d)xquhcharge?

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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 distanceot 9l ixnahbt.r; ms.0 7ecn30 of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from9 b ;axci t..etnmn370horsl0 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 centev5r hln;/zf7wj u wii5pn ,ppr()/3lyvk38 umr 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 other corners is also filled with a chargpuri7/k)wh/yvr im l( up5np,v;3l8z5w njf3e 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 agypfa4j(d -l-d;nqeg u5 o,0j 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 ceng0eqauj,d(-df; op-g45 j ylnter 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 charg5.eu0qkc pt l*yr.;not6*c qzes 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 ihhlp.:8t+ nuts 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 respect e9xgrdszah +) 8hr.j ,tseo:e.xcept that one has twice the plate area of the other. If the smaller capacitor )r .,+8a.dor ejht9zgs :hes xhas 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. Iw85yc w4k pbrgea23t 1ys0t. k6dj4ibf the area of the plates is doubled and the distance between the plates is halv14tbdgetayk j py0 6cw8w.b54s ri3k2ed, 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 capacito zbnx6xpb7 g(;lp p v(ofy(49vr fully and then is removed. The plates are immediately pulled apart. (With the batterx(;(46 yplpbzfvvn 9g(7poxby 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 thordl *(8.diet2d1dt le plates of a given capacitor is weakened, the capacitan(1lltd.r8ddoe td * 2ice of that 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 cap2bz,m8tomm d;: ew3id acitor are maintained with constant voltage by a battery as they are pulle t3wdmm8, ; o2eb:dimzd 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 cap3d;(bwe*swb 1hj-w x7pgncwr e8o4e1acitor are maintained with constant voltage by a battery as they are pulled apart. ; p 8es(ne *ec1jw1g4brhbowww 3-x d7What 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 betw0 (joj* ic0lr.cdowy.een the plates of a capacitor0c( * co0 w.ojdy.jrli.
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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 the plates of a 0kf -3ewahk l-(al3f bcapacitor. What al w 0f3-ebl(a kf3hk-happens 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 between the plates of a capaehzt44 9rl* mtcitor holding a fixed charge. What happens to the electric field rt 4e9*th4 zlmbetween 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 connected to a battery and 4k/ (113lmrwidxq fow becomes fully charged. The capacitor is then disconnected, and the separation between the plateqf(1/3mkxl4 dr 1ow wis 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 hold::*op4uis a) g)ez eijing a constant charge causes the energy stored in that capacitor tou)gpae:zo :) i*jes4i

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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 stortb iksf6s9osk7k05i5 ed in that capacitor to9k bi75ksof5skt 60s i

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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 m/zsikv/ r)st36.9nv l mk ec/1z*hnsl s4p9fmove 10 C of charge from point A to point B. What is the potential differencetl/sz/sk31es/nps9hmmk l9 4r6 f).cv*n viz 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 ele 9*fthsuo y;1zfc+y; qctron from point A, where the potential is -50 V, to point B, where the potentihuyf+q f* cy;1;o tzs9al 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 through an electric potential diw5)g v+ p .h,f8kjpmfvw h5gzx;2kq4q fference of 500 V. What is the kinetic energy of thw vfg;m5 5qwf.82h4qh,vj )+kppxz kge 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 re 6d.vc, km(zspst, is accelerated through an electric potential difference of 500 V. What is the speed of thd.pskmcz, v (6e 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 differencepgsr csw-d9 (1 qswl-4 of 1200 V. What speed does it acqu4lw-1w- prsds cqg9(sire?

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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.f uvsy19*srd +,. q-0cffgdfh0 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 accelerated through a potential difference of 51 2rrii7.zyz i00 V. What is the velocity of thi.1y7izrir 2ze 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 p6plc:jqlc2+i s3sf7charge 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 ssl7 qjcl 6p:+f2 3picdifference?

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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 maintd:/j i9lhy9sv qt) 7od opki+2ains the electrical potential difference between two parallel metal plates separated by 1.0 mm. Whattld/v 9:p)+skd 9i7qhji2 oyo 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 fieldn kve+pca,q; 2, 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 ia;qkc+n,e p2v s 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 directed towv 3,m vsgbj bc19so+/qdm-h8iard 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 directlov mvs, 1j9i3m+chs/qb gb 8d-y 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 ofj ; (j.plqp9xao q6p)e an electric field of magnitude 3.0 V/m. o p aj j)lq;6pp.x9(qeWhat 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-V battot.nb2ev+kt zq r0*j6ery. An electront.t *r0+jvo 6nbe 2qkz 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 connspetu4 -a z0l/ected to a 12-V battery. An electron release/sp-ta l0e4zud 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 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 bk47q.skmij n: n9,czoy 0.20 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, whatk.sk,n9qcnj7mz4 :io 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/clermix.0r*b ak :d 6a5*bk3j C directed toward the east. 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 elkxei5c bj*rm.3akdr6* a: 0bast 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 50d/b9 i +htp;vz N/C directed toward the east. If the voltage meashpi+9 vzdb/;t ured 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 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 pjkpu pp2/8) hev)mc +ootential difference of 12 V, it will acquire a kinetic energy (in the absence of frictik2p+uvme8)c pp)h oj /on) 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 + aw 20dld-l+brye xk1at 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 oo3lm3e +3, kv ebwm*dunib l(rn5mu3+f a meter stick. Find the electrical potential for the center of thew++5 ul(,voknmeind mbu333 *e3mlbr 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 chav5ow5 q;jop:ly d/c3mrge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potentiy /5; ql odc5:oj3pvmwal 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). - 4vuhhmo8qb/.tu d:s* uehz9 If the potential is taken to be zero at infinity, what is the electric potential energy u-ome 9hbd8ts./* vuh :u4zqhof 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) and a -2.0-nC charge is at (3.0 m, 0). qc3zmx5ul+l+zt 4 i p4v4t a;p If the potential is taken to be zero at infinity, what is the work required to bring a 1.0 x 3lvact+4;qm4up 54z+zi ltp-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 m(uc07jok8uzfr/kqr9 jl )tnd( 4 3ko.kc0dv of a rectangle of sides a and b. What is the potential at the center of the rectangle if q 4 vdj9/c0)umr0cn u j(od3fq.l78ortk(kkkz = 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 diagonally l;py1 xya, jsn:/gek+opposite corners. In the other two corners are placedl/e :j ;pyg+a1x,nyks 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 (charge c 6jlc3-org)w +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 plo6,k s8/pkl;ekm 6ut qace three charges, each of 2.0 mC, at the corners of an equilap8m o6 /u sl;ktk,6qekteral 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 p1 5cu,q2 9wc7ht92mto zr.dwnuaaj .tlates of a 2.0-mF capacitor when it is charged to 100q1,..tz rnwmwucta 7ca5 t29j2 ou9 hd 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 capacito90q4e jnta c6dr 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: t k6c9bku2ss8wjb5 rwna-lgn :b+l 1 plates are separated by 0.050 mm. If the capacitance is 17.3 pF, wt sn bn2wgbca6sr9b:-k 5wk llj1u+8:hat 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 aa; s0/sn.w*skjia;vd rea $0.20 \; m^{2}$ 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 capac9bk mwe61r8g nitor 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 thew8 m r16bne9kg 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 battert6y;: na j *,vjdw+to0r zw6bmy fully charges 0wjnr6 w6a v*mjt, :ytoz;d b+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 onynzzx0a5.7eo -s.x+ neycd5 l a 15 mF capacitor. How much energy is stored in the capanxdn.a 5s x7c-e.5y z+ye olz0citor?

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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 capac)iw 0f ;dklg;eitor. What is the energy stored in the capaciwld; eg0;)k fitor?

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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 ofy)bgo q 2 kzylc)b71or7ly14w a capacitor when it is connected toly) olkz24wbbog )c1yry17 7q a 12.0-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 chargee(i.vmcvn -cw,8 zd:ed 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 areadq*c r+ oec,6n $1.5 \times 10^{-4} \; m^{2}$ 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 x6xs 7s+x nx(iconsists 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 capaci -y6(nhsw o1.xr0pen ofo ,er(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 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 g2k-9toni3e kconstructed 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 17 ng+ /s;d b8kslo2bajfnhdil (3z7sconstructed 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 charllm8 ehq,23vvb9fs:k 1w1e*kfkx(k tged. 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 capacitance of the capaci1l 9*eve:xfq,2kl3 k hs k1kbftw(v8mtor 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 b s yeh;we,7m;xattery 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 vol;hx,wm y7s;e etage across the capacitor's plates after the slab is inserted?

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