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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 is not a ve ;swe * +j8x,a7tnm2ndqq:z bnctor?

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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 zp a:by)1m1ron/l e( xa

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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 surroun wxo 0j.s06bmodings. Object A has a net charge of exce0s wo.6mo x0jbss 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 direyz6 w/c0oj10xqhy,v l ction 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 movingu b1 k84wr1jsr in a 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 hollow conducting sph5 q ,ax:ct4sesvv,u-were. 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 accelerat vxg(itwx e6sw*+jj;- k5ws d/ed from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ball beesx;w gsj( 6*-dtwi5vj/wxk+?

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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 tholqj*rh 0a+;g e 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 from point A to point B along an equipotent;b oe.73p h hk*qg0iuhial surfacehp k q3ehihu7bog0.*; .

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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 vvc )mp,-9;vvuvy(t fbe

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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 carcijjjq /ws 43y 8pf3c,rying a charge equal to that on the electron as a result of moving ths3jf ijyc w4p3jq,/c 8rough 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 unimcnftjgz 0d z+)h49/wt 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 correspon6 oua l 2q*nna)qhwkhgd2/ p3hzta//8ds 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 dju+lfb m2d/ 6c:rj*fj istance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point f2*ljd + mjf6urc:/j bcharge?

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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 from a negative point v5m ufx*bu l;(charge is -100 V. What is the absoluu5v;lx( bu*fm te 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 charoii*3t6hzv o,ge 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 charge i,o6v ti zoh*3of +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 a/t l: 5/f +n8pasdvjhbt the center 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 thnpa t/ fsv/+:8dhb lj5e 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 charges tho7cn8-lmux*mg ,c p9w at 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 (5 0aq ; p/hiwyjbsfh-m g-rr1a

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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 iyl 1ie*4dki ;un every respect except that one has twice the pl1l iu* 4ydiek;ate 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 cap.q lsu2 ;qq6gaacitor has a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new capacitancqulq.6gqs2 ;ae?

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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 ca:,mhxf svsj,y+1q z s(pacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) qxsz 1 y(vsf+,,jsmh : 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 wevz+. 7vp b/xjyt. u82s3z3aa 1t altomakened, the capacitance of that cay a vltp +z7mtx/3za.81.vsj3oa ubt2pacitor

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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 wa3/nk 1j 19ejnrdr y4uith constant voltage by a battery as they a1/dn ru ykar9n j3e1j4re pulled 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 paral8sof,m u78xnb qry,xg-:w ijj / m;d0slel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. Ww/ f,s x0; ignbmud7jymo8jrq:,8sx -hat 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 dieletwx j x*d7(s(kc botj d+ta*ie, 4xw:5ctric material between the plates of a capacitod4kojxa7x wit*:+ (s * x de,cjttw(5br.
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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 betwer.g 6f- 8rm)rzj cihb0en the plates of a capacitor. What happens to6 )rjfgi c. 08hzrmr-b 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 pl86hvt(/p (dqwzovca:aced between the plates of a capacitor holding a ftd/6cpqo w:vh 8az(v(ixed 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 and becomes:jeu7c .ogj5 bts05e s fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The enb7et 5:50. cjgose jsuergy 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 ca;.f shxv. 26mp)z9 5zr u7fiqe/ep+n6pq iiur uses the energy stored in that capapmiu.fe6u/ zv;rf5 )9n.zii 7re+ s x2q pphq6citor 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 given capacitor c+efsc;*+;vxqsk7*/cp l3 gm r er1lf tauses the energy stored in that capacitox pcr3l vt1c/;+qrksglf+ee*f 7 s*m;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 tos7cc .ivh6caq j/;a-f rmt:e9 point B. What is the potent6amc: h-.c a i; f7jqv/rsect9ial 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 an electron from point A, where the potent1ssk- hc- 4crw-yhl1gial is -50 V,cgy-sk1clh1s w-h- 4r to point B, where the potential 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 accelerjod/ 5ezlj;lf(u/h ( wated through an electric potential difference of 500 V. What is the kin5j (weh od /zjl;(ufl/etic 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 accelerated through an electric; ,6nk1n9,ykkq riq .4u;xwz0q:u-fg u pmy gb potential difference of frgy4k,;mwq:,uni yu bpx. gkqk-;uz qn 0 691500 V. 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 differe f82lek hgj8 bnwf-(o1nce of 1200 V. What speed does it ac (lfghekbw2j8o 8 -nf1quire?

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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 mov o3ues6.xbvg :ing $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electroncg4.lqc)bh9 1c jt c,n is accelerated through a potential difference of 500 V. What is the velocity of the electron 1j.cc9c)b hltc gn,4qafterward?

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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 fr)lwrbo1d1 z6 o0sfpn8u q4sn u9c9e0nom rest through a potential difference, and afe zq0uoob srsn9d0n cl)1n498 16wuf pterward 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 5.cbe7ez k v1*9qia9yd0ld k ypotential difference between two parallel metal plac*ekv1d9ib. yk ad05lz y 79eqtes 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 500 V/m, is directed parallelj54bodu3os9kns -1xvy6 at /x to the +x axis. If the potential at x = 5.0 m is 2500 V, wha-n v/5 xbs1ys43xaudktoj 9o6t 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/t pa3c6 nvg;z.C directed toward 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 directly west of that pv6;a. pgz n3tcoint?

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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 f;s7 vb2e( frjbs*dae9/ *jj fjield of magnitude 3.0 V/m. What ifer*j2j9 s;f j*vbb( ed/js7as 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 128r mbp* cl f*.ard4/o(w*dsbb -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 pointssr(b w p4*/8 mdbfocd*. rlba*?

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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 12-V battery. An elrz9*+0ti g2w o0 b..p ebgxjsdk(b3y lectron 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 positbbi.9bdk*oz 0 sw(3y+2pt 0rxgje lg.ive 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 12-V batteryq.y()m x) k )sin/ fep2h.yzuu. 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.f yquuyz)/ xeknhs)p(2im. ), 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 electr2a35yx5k,nglzs t v w5ic field 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 voltage5,a gly2zn svxw5k 35t 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 directedc 2:lzwyci:hzv6 (t0j toward the east. If the voltage measured relative to ground at a gcyi:0jtzvh(:6lc2 wz iven 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 potentu h 5dk:wwqe52ial difference of 12 V, it will acquire a kinetic energy (in the absence of f2keh5:q5u wwdriction) 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 afky o.bb5+.n8 evd v .s56ji5uetrs. j 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 hc; ovy0 j/b;5y8aj:9cwj w - tymzv/ipotential for the center of the meter stic;vt 5yco;w8cjmzibjjywy0/- hv9/:ak.

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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 (3.0 m, 0).df9 g+/g f8mmu If the potential is taken to be zero agf8um/9 m f+dgt 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 af u-4f 5l,bw96deidc j -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 energy of a 1.0-f4d w,9uj 5f e-l6dbcinC 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 the potu-4vkyoy 2q6h2q-e cz ential is takeu he6-qc2y2 vy-z4oqkn to be zero at infinity, 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 up it8;3pbswz4+zil)r87erw a rectangle of sides a and b. What is the pote3p t s+r4 zwwb;7)e8iizplru8ntial at the center of 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 3wr0)bqu0lz ujt7* u oa side. Charges of +4.0 mC are placed in two diagonally opposite corners. I qt03w0o ul*)u7bzrjun 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 +2e, massbp4xun(vfi :. $6.64 \times 10^{-27} \; kg$) 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 necessarm)u4ht:4zx:a wwtxwm 4n 5k*uo ,trz9 y to place three charges, each of 2.0 mC, at the corners ,on9:uuw4xt4*m ) z 4a5w :txtmwkzhrof 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 ita5-eyt:+pi b+nwk8w7u. khtk is charged to 100 Vu t- ak8ek+kiy 57np whtb.w:+?

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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 pl30 cj 3zdza /y9k/w1t d*1vxndy,jcwpates 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 fuw q27xp*. qlgzrr. u.e+ku f)illed with air, and the plates are separated by 0.050 mm. If thlfu.7re.p w)*rx2u kqg+. uzq e 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 capacitm +(m.op duw+./yijh m /:ahclor 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 capacitor has a plate separation of 5.0 cm. If the potential ;:wqdwp. ljcc:px d::j n0b*l difference between the plates is 2000 V, 0j.:qwc :dd:pj xnb:;wp cll*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 across. .x o-4r1laqbpy e.ah a 100-V battery. After the battery fully charges the capacitor, the clxa.- h4e.oy ra.p1 qbapacitor 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 is sto - q)glawzn.,ared in the capacitor?qwz,nl.- a a)g

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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. Wha ,;2ts4ev gd s3qpcu,tt is the energy stored in the capacitu;2s ,vt,cpeg4 3 tqdsor?

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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 connected to;eseb l8rxd:wbckcv t./z9 hm0t +1p/ a 12.0-V battery. How much work was done in charging th/ee /9 p ;xlt8mbw1 ckt.+cbz0dvrs: his 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 that i(bjf9ji9jku q xo8tk7v) +3)ovjsb 7 lt 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 + lcoui9i r(r44kw.zuconsists 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 consists osi*()hyahs e(j*j )j sf 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 of areav,z o5knyd2a, $1.5 \times 10^{-4} \; m^{2}$ 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 arekq5ps68zky2 ca 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 capacitorpa7qk5zw g8 n9 is constructed 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 ps-1ht wer* ;qand 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 ;wrq-* seph1 thas 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 q)ps z (zh01s8vv1s zez8 an)i50-V battery and becomes fully charged. The battery is removed and a slab of dielecvsnsz1ip 8q)0hv z 1s8z)(ez atric 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 slab is inserted?

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