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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 a vector?v56uicr57;a8ade f 1zcsv1w bv d)i+ ro6f2dx

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombz mtwq/+cr*p/0ovgkl /k)g 9e is 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 6)gku 1lowf42,-v 1u jmq)nzrpjl b*wtheir surroundings. Object A has a net charge ofp ugnfb k)1w,1-*u4oz6l r 2vqjlwj)m 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 5/l8m2zsrs0yes2htcj s h u4; 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 the electuh94xr oa45 pt.b 9gtdric 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 sph p1u9f0 nkp,mzere. 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 isdu6 ho:c)it:r accelerated from rest to a speed v by a 500 V potential difference. If the potential differen6ro:cuh i:)t dce 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 potential is referredzan1m aktu22giyxe3 jy pr ,om2w79 84 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 v7bsk 7ia-o) osuy)j) equipotential surfack7ob7a jyosuv ))i )-se.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mus l 50lj s0cv3akywj;n6t 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 pdanptn 9q+rf,mq9jvp+8- w8narticle carrying a charge equal to that on the electron as a result +,+nppv8d9 f n89tar-nqmjq wof moving 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 j ui9xamhga*94vn/0 x a 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 corrd fz z+f,)irpsr7, .dtesponds 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 charkms (hcxfv+)on4.y(k ge is 100 V. What is the absolute potential 4.0 m awk)fhk+(osx(c v4n.m y ay 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 potentiuse ls e opu.l+28-(3n(fsqjyal at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point(-u yse.lsnuo8 qlp+(es23fj 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 centem5(qk 2bnt daf85; latr of a square is 3.0 V when a charge of +Q is located at one of the square's corners. Whatabmnf d5a l;25q8kt( t is the absolute potential at the square'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 of a square is 3.0 V when ag;tu4 )p 70yfxj 5 xdmh1u8g isavd61u charge of +Q is located at one of the square's corners. What is the absolute potential at the 1uj 8)5ud ;md6hf vi sugxpyx041a7tg 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 consisbl9ld +z ov ;w959btitt of 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 i-rcm qf,dr9y9s 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 /km 5 ztgg,u8 ll/mvt4 g5itdrd(d9z4n e(zl9 in every respect except that one has twice the plate area of the otn(l kvd9 t8 u5gtz4mz/tdgl mzl,i9 45(gde /rher. 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 c9v2i fniev upbjd.)+/apacitance of C. If the area of the plates is doubled and the distance between the plates is hauipv) fbd/ 9 2iev+.jnlved, 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. 5ty 9 oab94gpf 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 th b959yog paf4te 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 of9a b8cy scw:d)u cs a--x6rrn: a given capacitor is weakened, the capacitance of t: anr:w cu6sxcb8a--ds c)9 ryhat 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 maintained7:ezjaikh z2 9jpf)7k with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the h9:e)j7if7kzj akzp 2 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 capacitorr;q8wkjx.9 eun3kut 9 are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the e3j.ruk xqkewu 9;n8 9tlectric 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 thi;gab a)m ;x8af(ka6+mvvx :v)v*tx x e plates of a capacit tbxv*f8:m6x) agx(v )v+akix; a;amvor.
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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 betw1rr*3dan u+ weeen the plates of a capacitor. What happens to the capacitance1udn3r* +w are?

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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 xr+ u(m,o1vr /wq v,kcplaced between the plates of a capacitor holding a fixed charge. What happens to the electric fielmu ,vk+ 1xw,qo (rrcv/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 becomesa6ql12;hxa wl fully charged. The capacitor is then disconnected, and the separation betweenw 2x1qlhal;6a 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 c1 bbx d(hct4disz.*7 wharge causes the energy stored in that capacitor b14 .izx7 (wh*tdbsc dto

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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 energy7:du+uh lo,tx -;hzsr stored in that capacitor t ;h7tsd ozru h:x+,lu-o

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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 energy92ywof:x) sf i3hcjz 3 to move 10 C of charge from point A to point B. What is3 32hyo: wxs9zfcj)if the 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 a)0sd* mfqdq f+n electron from point A, where the potential is -50 V, to point B, where the pote0*fd)+dsf q qmntial 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 8wy l7wd7wcid0 x1o :vthrough an electric potential difference of 500 V. What is the kinetic energy of the protl77 o:d8vc1 iwwxy0dwon?

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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 acceler8rso4aa)pb3r j yt,z-8 z(oyp ated through an electric potential difference of 500 V. What is the speedrpp y-83sr8(oyz)j,atoaz4 b 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 potential difference of 1200 V. Wrk(t6 9upk*td /enk(b utl4f8hauf8u(k6kbke/lrt49p( * t d tnt speed does 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 in movingipyl vug t4.n2qpo s/,;lr +u( $8.5 \times 10^{18} \; electrons$?

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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 accelerateov0xinu (x0 f3d through a potential difference of 500 V. What is the veloux f(n 00vixo3city 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 a charge of 20 lpa . 6 e5ov74wctlua,:/urxjix*o i)mC. The object is accelerated from rest through a potential difference, vxai/5 6otr.l 47,xpl* ou:ic)juwea 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 difokm8hi64+0b /1iux but9npu f ference between two parallel metal plates kixmpfu t 61hn4u8ubi/b+o09separated 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 fie;b:p y.bhgo ic(c e85i x*va3)mrr(gt ld, with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x =(x .igpoi8 c):5b3v*rye(m gb; rcaht 5.0 m is 2500 V, what 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 do cb:sn7 7wx5 hy,ynd;irected toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the v,bnsw5xn;:y ohcyd 77oltage 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 an electri48 t*imc3 lmei ocai:z85k2 ,vbz iyd*c field of magnitude 3.0 V/m. What is the change in kinetic energy of the prot*zk2iid ,*te: io588iya3czmblcv 4 mon?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, sep0 yo(l:yykmesq901xvgo+uw 3arated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a locationw39 sx:u 1lyoo+e00qyy k(vgm 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, separa )(y5u nwhred0ted by 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.e( n5 0r)udwyh 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 0c+5reozyn5z *xe h/:j( qwucb8 hk) 8v.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative pl (v/8e+5 rzhc5x *8n) uy zeq:kbchwojate. 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 l; u*diwz( p4*gacf hjb1dp4+the east. If the voltage measured relative to ground at a given point in the field pj1b(l;ic w4hu zap*g*+ dd4 fis 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 lu41:w .we7 xhiy z2fzem a39nN/C directed toward the east. If the voltage measurede7wlz x.zh 1mu2w y9ifena3: 4 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 potentf*e 4dbug-jx1 ial difference of 12 V, it will acquire a kinetic energy (in the absence of 1dxbgej-*4u f 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 : zs(mii /x0byat 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 ee1iip:y3laa4 nds of a meter stick. Find the electrical potential for the center of the mety epl41i:3ia aer 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 charge .ld72 ,bez)1yvuc )ax:y rt cbis at (3.0 m, 0). If the potential is tak2b1d:r ,atub)) eycy 7c v.lxzen 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) andsm-+cb:n21 hfzqs hzt.i n ;6v a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric .z vf: i-bn hs+hs2;qcntzm61potential 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 charge is at (3.0 v/vk;k2jofd 9 m, 0). If the potential is taken to be zero at infinity, whatoj9; /fv2 kkvd 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 corners of a rectangle(o iow -7 +fdi(inag.t of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cndo (gwi(of.i 7i+at- m, 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. Cha3 u5nf;u6lzf cv c+)vp*40ebxpjr5c hrges of +4.0 mC are placed in two diagonally opposic5zlup6 e *f3c5v rb v xfp4;nj+uhc0)te corners. In the other two corners are 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 +* 1 7x4u( dl+smni9lnqzwz f9g2e, 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 n o,dxb3fgpwwl 1n/)p 7ecessary to place three charges, each of 2.0 mC, at the cornerb/1wp3npflx ,o )w7 dgs 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 to l0rh,r9d0b rl 10 d,h0lr0 lrr9b0 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 plat,n1wtcqf2k x2p;a; sxes 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 plates are separated jeni8h6r*c+ 53lndc(.g:e ngs j qx+h by 0.050 mm. If the capacitance is 17.3 pF, what is the pl3r c6ji dgcsxhlq.eh n+5g8:en*jn(+ate 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 plateslv xo.i*,yql( 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 capacitor has a plate separation of 5.0 cm. If the potentiu( 6wh n7 tihjmf62um;al difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between the plateh6t6( 7nmj hmifuu ;w2s?

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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 battereuzhmnjiv, c((zp2 5:y. After the battery fully charges the capacit2:mz(nv5pzji(eu h,c or, 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 much energy is0h*nrsngxy6i8 8,fqclm 20rdl:8 d b c stored in the0ns2*xhr,ly6q ni c8br8lgc: 0ddmf8 capacitor?

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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 cafwg9 z9z5 )octpacitor. What is the energy stored in the capacitz to5cg z9fw9)or?

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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 connecte7.+o dzjn;b vyd to a 12.0-yjbodz n7+;v. 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 chaq;cmzb*(p2*s- l0asckf xcu9oi x i2 +rged 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 ofqv7lugf6a m3c)x2y 7 e 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 sq.p e91avlq r16rqq,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 capacit mz6 q,.-m f.hhmlc+deor 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 capo g.zg3m8je1gacitor is constructed 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 conc + ;aum,hmo .)w*bwqvstructed 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 c66 d7. iay0ilhrm 8x;x oke2mbecomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is iroehdm a c ;yx0.xlikm2 667i8nserted. 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 cr)v,;;zp -az;zauxm5 2a3n l )vbfbalonnected to a 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 dielectric has a dielectrm3,-z z;;uz)pb lvaa lfx ar;na)b52vic constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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