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习题练习：Physics Unit17: Electric Potential
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 作者: admin  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 is7i0;aq/p6c*mwmas o1)3 a bgcek a+ov 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 iu/nb nr (o6ou0h1fx --yxt:i 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 their surroundings. Objectz2iv3hau u 4l+ A has a net charge of excess electrons. Object B is grounded. Which objectl+3zuiavh 24u 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 thd x4apylx.k . sq-3.cwe 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 elet7jgj/h3yb9ds hq 4r 1ctric 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. The3z zxk.zdtqlyn . q*vgk 7.kmwj,o,,7 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 is accelerated ;gc 3h9,le41q a fgi4t4vjg hzfrom rest to a speed v by a 500 V potential difference. If the p hiz f9gle1j4g 4vgcq3ha;t4,otential 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 potential xuuvkk7eweo3rjw -g po) t) d2u5i7,1is 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 f l vdj10va:t9o-1uxikrom point A to point B along an equipotential surfac :t0l iouxkv1a-1dj v9e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfax+a 1rngqn* 4g n61iexce 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 6e0nlwx fwy2*a particle carrying a charge equal to that on the electron as a result of movi6xwewyf 0nl2 *ng 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 of 6x4xc/:(jhydzl i.my

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corla9,jrz4 d ;lvresponds 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 ppz k-, :nr2hqooint charge is 100 V. What is the absolute potent- kn,ro2 zpq:hial 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 2.0 m fromip )b-7n7*ggd5* 8w3iwp arxzb g84or qz9glt a negative point charge is -100 V. What is the absolute potential 4.0 m away fro8 qrbl)bog *g*ganp77-tw 93p z84r wxidgz5 im 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 charge ofvc)8 0. udnnqn(hnplgs09cclk y 7 /5b +Q is located at one of the square's corners. ybdlc v5u0k)lc8/nsnnh qp0(g 9.nc7What 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 a charge of +Q isf451j;nh 6( ukbcltzqg76b kt loccbz k;gbj4t 65l1qhfk t6 7(unated at one of the 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 o29tjn7zw,tt z/dn8zn f 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 volt3 wu 6lpnbbv.ws;yz2d0d5r e9 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 identical in every respect except that one nhytx2svm*(* has twice the plate area of the other. If the smaller capacitor has ch x*tsy(*mvn2 apacitance 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 6 wb-7yrif-l zarea of the plates is doubled and the distance between the plates is halved, wha-yz 76 l-rwfibt 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 paralltw, vcn)8n 8vg:sft- oel-plate capacitor fully 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 plates nsct-8) f ,g:t8vonvwas 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 thex7f(i/ it0yo0ez jy. t vnfo;:o4 t8cb plates of a given capacitor is weakened, the capacitance of that capacitorofvyz8 cb0o4e y (tioi0txj7;n:/tf.

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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,wy knv1 z56 vbu(jz8q constant voltage by a battery as they are pulled apart. Durinvw5 znj1 y8b,zvq(u6 kg 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 capacitor a967 g z5jyu rf9xko7pgbp1 kk5re maintained with constant voltage by a battery as they are pulled apart. What hap5frg9kj5x6p7kbu7g 9 kp1ozypens 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 be0*avvbqo uy8ix ,,vn;u )jmb0tween the plates of a capacity*8b0,um; bo v0qia, )njvvx uor.
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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 placedbugi0v b+y6g) o.eb.w between the plates of a capacitor. What happensgbew6 .biy).b0u v +og 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 plac+q2c .)gfy ludmaybq8nw 0*5med between the plates of a capacitor holdin2 n)q.+mqw50y8u yb af gdlcm*g a fixed 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 connected to a battery an5,3b sl dg, 9q+cs-n( ornjmsdd becomes fully charged. ,l cds3 dj,bn nro+(gsm9s- q5The capacitor 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 capacitaqzy5 .k,k2w4h tb d1j :05zsohhk )jzi -ixy2ence of a capacitor holding a constant charge causes the energy stored in ty qikbz 5 -zos.21e:yjkhw)5h jt,x 20 di4zhkhat 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 givr n)*1/u huam093sxl(imvz h wen capacitor causes the energy stored in that capaca mh h x9su0/mun3r*w)l1v(i zitor 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 fpb(h-/ks0 up+qs1s0ma7e ac j1pt.ikt8h dn 4rom point A to point B. What is the potential difference betweeneh8m7k+. 1jhsp /at b0 nq-cps d0t(p sa14kui 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 electron from point A, where the po/-9pp ogsvkas9y - )qmtential is -50 V, to point B, where the potq-y -pkop)s/9v a 9gsmential 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 electric7+4zczjvq 0l2 3zp)/skhiyki potential differe+zc302hl /7qzkivizj s ykp4 )nce 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 rest, is accelerad:/ v8kqsz fu+ ja xd3+y,b1psted through an electric potential difference of 500 Vsy, +p81v:zxk bsdu3j a/q+df. What is the speed 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 12 wy2c.0 (rte5c mn6hxyt;t, cl00 V. What sprcl. 25 (0mh,c ytct;txw6 yeneed 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 9p;mqgkru 9 l54.0 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 acceld) eqfpm 40g zp4woqf6q7+a(merated through a potential difference of 500 V. What is the velocity of the electron m gfz+ pae(m6f)q4 p0o qw4dq7afterward?

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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. Th4 dbt:v+p1;kem/ pypxe object is accelerated from rest through a potential difference, and afterward the be1m/ :kpxpdv 4tbyp+;all 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 differe8stz u9,nus j/p.+fdxnce between two parallel meta uxj/9tzp,.u +ns 8sfdl plates separated 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 field, with a magnitude of 50q z)t3q/ 8nida0 V/m, is directed parallel to the +x axis. If the potential atq3 ta)dqz8n/i x = 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 ow6o )3iie*rp d )4difgzc8d, dvue8x6 f 50 N/C directed toward the east. If the voltage measured relative to ground at a giv) 4o3c)86dgpd 6di8i xiefruwvz,e *den 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 m along the direction of an electric field oprbak :m)g1 v:f magnitude 3.0 V/m. What is the chang: ):mabprvgk 1e 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 0.2d *8o 9wvbet)f0 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from owfe9v)db8 t*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,prrsq/)bs/7 wq wsb qw7)2r6g +b 7yzr 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, how much kinetic energy 7r /pwqqy)rgwrs b6s)+r bw/s7z72 bqdoes 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 connecbc( le-;c (hznh ayg3s xxv30;ted 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 h; (3 hlsyxz nc3c;bav0-x (egthe 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 fiexws w*2q:d/fgpum jtu( +c79nld of 50 N/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 directlyuu9g mjcp(sqf2*t n/ w:+xd7w 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 toward the eo;53oblgdblt5 dg(88 i-vvjcf5,e d vast. If the voltage measured relative to ground at a gl 5,5b big8tvovvd;ojf8dl(dc5 -e3 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 potentianb ,204md6lch)y kna xrb0-l al difference of 12 V, it will acquire a kinetic energy (in the absence of fricti kdam 4 )n6lb0ryaxb2nc-,0l hon) 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 distapc 2 awl*g*,iance 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 eleewqw u+ eymg( ; sygv(2j89c9jctrical potentiyj swmuge99jc( ;8v(w2eg q+yal for 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) and a -2.0-nC charge is at -6uufx r:yb4k(3.0 m, 0). If the potential r:f4x-6uku yb 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) wb/rd zb) 8i)+slfl3 2z pllp6and 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 potential +l3pb 6 /p2zlilbs)8)wfzrld 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 m, 0). If thw70a /y* m2:)e,eioeskxkl xa e potential is taken to be zero at )y:ls m*7awk2k /x,axeo0 eieinfinity, 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 corners of a rectangle of gw)1e r:;:vjkj 3qgh)f ae pm1sides a and b. What is the potential at the center o)vhq gjgm jrk)1 fpae:e;31w :f the rectangle if q = 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. Charg:a aa;8)hf2vxh v -in:xes,eues of +4.0 mC are placed in two diagonally opposite corners. In the otherix;8u2, na:x esaf)h:v vea- h 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 (chm*.f5v g2khkq /qi 5fu 9in4iaarge +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 t,l* . irrw8z*+gn fbgqo place three charges, each of 2.0 mC, at the corners of an equilateral trianw+n,r*fb 8 * rg.qigzlgle 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 3shet2ljd g3; on the plates of a 2.0-mF capacitor when it is charged to 100t 3js;2dehlg3 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 plab6* cs;sg 7af -sbc/v.vlx v-ates 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 pla m+b7ty-fom-ox-s7 s-v ojx ;stes are separated by 0.050 mm. If the capacitance is 17f b;vost- -xmojm7oyx+ s s-7-.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 capaci k8-eco,wtlnp8 *nxitzq 20i4 tor has 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* 92qh9yt01bfctr5 glm ty1dj acitor has a plate separation of 5.0 cm. If the potential difference betwee 20q cftt*ml9b yrh1jgy1d5t 9n the plates is 2000 V, with 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 connected acr-ddop7 qe c7:ioss 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 battery, which remade-:po dqi7 7cined 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 muchzxy6th h9pe0;rx6j5/ yss pg) energy is stored in the cap6pe9shg; z 5px)j/06trhysyxacitor?

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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 theq+o rdxkw00gdyp7z8zj2 9 1x x capac d jx192 dp7gqzwz+0roxyk0 x8itor?

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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 nj 1: j9w0 (apwspezr+it is connected to a 12.0-V battery. How much work wa1:jzpr9+wes(napwj 0 s 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 charged so c8ff0 tpi+fl( n2bn/rthat 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 capaf7b 2hz 3v6nl0(w4 h yykwlcg6e,:hx.w pb6r icitor 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 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 consisj h:pn63.46igss: h qmhufio1ts 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 )40h)ise z8f tiv :wwoof 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 plate ag5.x efzbywa/q 27)yz rea 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 of -etedi mwwg/u760 ez;9)lu ga$0.40 \; m^{2}$ 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 becomeu.* m2ij(kwpu s 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 capacitance of the cappw ( im2ku.u*jacitor 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 charged. sv)-fzh9. ) pma:l y7c:j vi7 6pktvjmThe battery is removed and a slab of dielectric that completely fills the space between the platm) p 7s -pfhkjv7 m:.vv) tac:y9jl6zies 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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