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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?p y(nbc z)4v +uqe5+ rxasqa+5

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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 uh+7y b3hbjp+ 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 surroundings. 80k -rcv/moh khu3ld- Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher3uhk- /ovdkh rc 0m8l- 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 electrii: j zmyqpo5 e6giu q9c1z8+9rc 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 op.v3c9gzzuap9 (j edu6posite 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 b+yz (pc mbmuc0f/6h- placed on a hollow 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 ;oi(nl8y 74dxm 0qpjq from rest to a speed v by a 500 V potential difference. If the potential difference i(x7modniq4 pl0 ;jyq8 s 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 poinels7 if c- q6vmqip5blp8+;t5ts 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 movvp n0qcnjgwnz0w*i52 )* + uahed from point A to point B along an equipotential surface.0) nvz0i*auhnw*qpg +nw 25jc

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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 bet(8u/wdkib. m

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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 e4yxsj / tjh3hisk34 a.qual to that on the electron as a result of moving .stx/34 y iahjsj 4kh3through 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 w1z(j us 7n,czof

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresax p;ba-5ze-u r gn55ylo96b rj5ongz*) rpc 6ponds 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 frompz nch/ru +abier8h2:.c:dt 4 a positive point charge is 100 V. What is the absolute potential rzd p u:i+th84a.hc e/bcrn 2:4.0 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 diswdob5i*o:p /q tc+cv 1tance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from dq*+ o /c vc51:pobitwthe 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 sqc25 +2zlkg3:*t hb7 x tuhecyyuare 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 fillhgek2t+t2: xul3* ch7 ybz y5ced 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.k 7.wo1w 6q2ktxunalyjx) 3f1 0 V when a charge of +Q is located at one of 6x 2w)fko3 lx jqwk7.n11 utyathe 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 7c q)ssjtpm bdq;1-q5i 67n4rw2yif bcharges 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 is:6x1d 5kdd/atcn la/ y 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 c6izmby39qxv+2dze t.j pwb52 apacitors are identical in every respect except that one has twice the plape6 wj32zti5q9 2mxz.b+dvb yte 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 1*.wzh(1dvb,oy;ktk7 i rgcfarea of the plates is doubled and the distance between the plates is halved, what is the new capacitanc or y7thzi,f;v(d1 c*wk.g1kbe?

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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 *5a b9iz (/xm.6xns3j uaomg uand then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the platesxuz6/s jan.mg9* o iau mb5x(3 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 capacitor is weaked 9 mqq4o/tqg4ned, the capacitanceq qog9t4mq d4/ 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 capacitor are maintained with constant voltage b.z-u/ 75- (vvgrzf 2knv fpjygy a battery as they are pulled apart. During this process, the amount of c-v/( kjrfg zz25v. y ungp7vf-harge 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 constant vorvv q2*m3 i8fwltage by a32 iw8fvvrmq* 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 lh24j hq imy/z8v5h.qxq (d/b3k, nti between the plates of a capacitor.h8ydn,qiibl/ qv/k 3 4xtj 5( qhmzh.2
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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 yjsm48+k0e)q6rc fumplates of a capacitor. What happens to the capaci8 em+40ujkm q)src6 fytance?

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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/7g(lp;rodi r a capacitor holding a fixed charge. What happens to the electric fielod7l;rg/ rip (d 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 connected to a battery and becoiag,x p)i)hjmb6i 1/omes fully charged. The cai bi, ))o1mihp6/j gxapacitor is then disconnected, and the 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 oft(kl b9 j0m2pdc9r:yaw*c;mz a capacitor holding a constant charge causes the energy stored inky :w bz0mr9jl(;d *9pc2acmt 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 a give x*al+vp+ ,() 2rggyb/m h.df)lnh ceen capacitor causes the energy stored in that capacito+,r)(vga /gef2hdcleplmbh+ .x)ny * r 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 from point A to pointgflu uhc4w/*3g 16yy) tu/k;u ugu x+n B. What is the potential difference between points A anguy wc/uk3 ux g6lyu+; /u4*1 utfg)nhd 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 movingtftk -7dc( u- tegt(2m an electron from point A, where the potential is -50 V, to point B, where the poten(u-fttd 2(e-t t7ckmgtial 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 acm 0iz -poc:(sycelerated through an electric potential difference of 500 V. What is thepc - (zsm:0ioy 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 w izd-(y29yijrest, is accelerated through an electric potential difference of 500 V. What is the speed oyiid-(2j9y zw f 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.2 oyhjr lf)xk6, r3osc6aka 3 difference of 1200 V. What speed 6,xoa fscj3 o 2)ry r3ak6k.lhdoes 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 9.0 V do i/w(wb)/ l6smzo5 qam; a0vn cen 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 500 fjn 0;b ,l;v/u ae8gwfV. What is the velocity of the electron a/wa8bgf0e,u jn; v; flfterward?

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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 is accelerated from rest tu+)uleye*i/fc u4 eyt+n61c through a potential dl ucc 4+)ey1i6/ unett*u+fyeifference, and afterward the 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 differencv;s cy9kh70kf o4t7mee between two parallel metal plates separated by 1.0 mm. What is the electcy7h0tm;sk v 7fke4o 9ric 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 a0vjv8i8bf o3w magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, whati8w vf8j3b 0vo 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 electric field of 50 N/C directed toward 5mua 12xb+)srwern- d the east. If the voltage measured relative to ground at a given point is 80 V, what is the vxw 2mns1dba- 5rue)+roltage 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 direction of a0 (1ypkjr;u v uzlkgz)f)7m *gn electric field of magnitude 3.0 V/m. What is the change in kinetic ku) ry km7lz* 0 (fvpz1;)gjugenergy 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 fne4-esg49; ldv v9ul0.20 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 1.50 m from the positive plate, what is the potential difference between the initial and final points? l9fln9 ;-4ued sge4vv

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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, 5 quytlq:qv-la)jr3) +kt. kafvqo 21are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When l)q qo . f3+:qrjv-qa 1l )5ktytk2auvthe 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 connected t3,u+0st+ gvgpv ycfz 3o 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 3 ygfv g++uz3t ,s0vcpdistance 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 dire 4xps/e(zow6qcted toward the east. If the voltage measured relative to ground at a given point in the field is 80 sx qep6o4wz/( 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 towi zve (ft.;ve:u0bj;ed x1a7 xard the east. If the voltage measured relative to ground at a giveaf0 x vj1ieb:tvd;z;xee.(7 un 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 potential diffe -atdo87l 91o 4,wf:zyxmtn wsrence of 12 V, it will acquire a kinetic energy (in the z7a4l:8xw1mntowf y 9 ,ods -tabsence 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 a dvp u 52tk6 a,-o-jfcs(cx z(gpistance 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 en(hix+n.gys ,0qv ac;k5(phtpds of a meter stick. Find the electrical potential for. pn, ;sg05pa(h(ityhckvx+q 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) lt16 k hssu9sd)*ljy +and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken jlu l 91)s+*tksdy 6hsto 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) ab47w io)gr v 60pa-zv r 99r/c*cto na+j*qbunnd a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zerw *tzri6gur7+q4v-o /rca o ba)9c 9npbj*0vno 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) and a -2.0-nC cha5nh 1r)86a0h 3j)e bpa vq8ht.onpwacrge 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 1 th85vphhaja .0co)q8ebr6 pn3nwa)-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 ,jq1lfw j /llr5u)1fb n,s.oacharge +q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC,nsr1u/ljlfja,f )bq5 . 1, lwo 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 n)og1/ gir/qs5vw- eqtwo diagonally opposite corners. In the other two corners ar/ q g)wg- 5oenqirv1s/e placed 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 +2e, mass4 +x9 5gtc0qwhtve wy, $6.64 \times 10^{-27} \; kg$) 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 charges, each oj,wk4s8m,wf rm;- es if 2.0 mC, at the corners of an equilateral triangle of side 2.0ssk-4e,jwrw;mi, 8 fm 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 to hwokz*)6lpu;ie2k ;z 100 V?p;ou *e2h l)zkw6iz;k

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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 pbh* * zy4bx, g3rcr-kliv-sh/ d*0tytlates 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 f deh ud+vu j277lo w w622rr9d5yily+qilled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, wha 2w7l 26ru7u592dl+dhw ey+oidrj y vqt 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 hasbi7 2b y ihr-k/ c;d-liph.1jy 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 cap(n1 impouqh3 ip4 :cz3acitor 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 electric field betwenm zphc4u p1 3i(:qio3en 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 capacitom(c + jmyelfn- 0+s-cur is connected 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 froms ume(f++-c0jlmy-cn 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. H 66min;(r:urh :yt bqzow much energy is stored in the cap i:6trrh my( ;z6nbu:qacitor?

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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 in thec1i2d 8v1,wxh lm8m3 mzv+f;eamw7m y capacitor? iz;am8+ lhe 1w1m2cm3,87 w dvmmyvxf

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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 g(tv:pm) m1u0hgvcth t45/( f vlg;vf onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work wasthgfc f vvt5:v(mgugp l4m)v0 /t1;(h 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 chargedp b-ssp(p 0(ts7fnoxp p0c t-ujq4:urt : 35sr 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 1 90zdbjmpyt -g3 njh.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 capacyu/h* 1+w ;wvwkwqe a,itor 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 capacitor consists of plates ov ,ujqde(s wss-: sxm0f15*7hn0nssd f 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 plate are /xjxu4zo/9tcddz n+fd ;;n8va 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 plateux73 ad-/f( 5pkefsb z 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:bf.zkhm nm,jz4yy94 en s67m connected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space yzmj z m.4n ,e b4s:hmky76fn9between 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 battery and becomes fully -z wjv3/a 2/jj/r-ozaufhc f ,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 voltage across the capacitor's plates after the slzcajwj,frv3uh 2//fo- jaz -/ab is inserted?

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