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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 ab xt*cl,:,act 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 ig7c)n 9z 1rfch1l y)sds 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 oe7 essti o68o/(kc,mi bjects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher pkiice tm7s 8o,6(/seootential?

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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 direct ysv0xzq0s s*l 4b+h25qmbu8xion 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 moving in aev o21we,np8mpj p: :s 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 sphere. They.4qtf cqpg*nzle )6g;

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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 from rest to a bkv9(s,nw+ qn ;fx-hyspeed v by a 500 V potential difference. If the potential difference is changed yb ,xh(q ;wf9kvs +nn-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 referrhko-h6y *p7ja;3tu:le v1 ibg+qscm6 ed 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 equipotentis4vyqm 4(wd3pal surfaced3wp(4 4ymsqv .

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfa* y3b84dog lpmce 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 charge equal to th+ b ( 18ky3kdngsy.x6t*c ep*eqozg 1uat on the electron as+ d.cn(sz1tx*o8u*6q ggk y1yk3be ep a result of 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 y3a uk2wztb,d3wx n8: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 cora5)i) ol2v9 s*gun. xpiogt6zresponds 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 charge is 10 oxm0b67 dpz2b0 V. What is the absolute potential 4.0 mpmx20db67z o b 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 from a n4 pd*r(9kbhayegative point charge is -100 by drap( hk9*4V. What is the absolute 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 centz c. p3xzrz11nyrb 94ier 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 charge of +Q1 y3znpzc4 1ribr9 .xz?

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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 squarebkq3zwkx0d9/ ikm,8 q is 3.0 V when a charge of +Q is located at oneikbqkm/8,9q3x z wd0k 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 of two charges tgr(edar)f94fp xxo s/ u;yz+.yy*,ly hat 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 vo7u /h l7/ dqvaiog.4is 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 has8x ) vgq1*.m4fjd8 ;oi wwginhyw1d: e twice the plate area of the other. If ;w g8g me :if8dqonxv4 d) w1y.wij1h*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. +* 3peadv* bjq If the area of the plates is doubled and the distance between the plates is halved, what*jq3abd v+ p*e 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 ,z pl(va3hj(j is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to thha3((vjz j,lpe 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 capaci,r vh t oy:lkyndr8.79(5hg tltor is weakened, the capacitance of t hd,l5t9t. 7vohr8r:gk lyy(nhat 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 i)/tcjro( x 1,nqas7m are maintained with constant voltage by a battery as they are pulled apart. During this procej ti1,cqs)(xmno a/7rss, 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 are maintained with co -lat* 5mdthu2nstant voltage by a battery as they are pulled apart. W2tlu m-td ah*5hat 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 between the plates of a capp s5salz5qtt2 p 5*3o vwb9 8uz5j9skfacj535p zb st ql55p8 9okzuat2v*9sf wsitor.
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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 papo()ba1eb9r6 tguzt;lb -o r0qer is placed between the plates of a capacitor. What happens to the capacitan;ab u109beq-6tz otrglr(b)oce?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric materiac7,1 ky9n -b8j3m 2,x b7ujjy qkluknrl such as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between the pla8ujyx k7k jynbj,l1kn u-qcr b279, 3mtes?

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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 batterz,mi/92py hgyf gk(,e y and becomes fully charged. The capacm9egg,2/hyykfp, i ( zitor 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 of a capacitor holdin*v(e yk6n rjjte*zs ua:o 96)vg a constant charge causes the energy st:(vov k*)9s e etn*6rjajz6 yuored in 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 given capacitor ca*ze:c7p nm f 0nv1e)bruses the energy stored in that capacitor toefzrmeb*c) np01nv :7

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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 movea9 oukzv wc*:/ 10 C of charge from point A to point B. What is the potential difference between points A u* :vca9w /kzoand 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 th3an 8 .anpv5i p9pbd0ve potential is -50 V, to point B, 89p vpn0a pv.n5i abd3where 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 accelerated through an electrqk 1o0efxt*upna7 mln4 w;3r-ic potential difference of 500 V. What is the kio7p0 aw;xq*1lue -4nt mf3kr nnetic 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 potential differoq7cx 4 j:x1tmenq 7 o1xtjcmx4:ce of 500 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 protonh)wh rpe ,-la7 falls through a potential difference of 1200 V. What speed does it a7)whehlpr -, 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 9.0jet8rd q4s( 3m4aiw*d 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 electro7ys +42s r6r7szwswyzn is accelerated through a potential difference of 500 V. What is the velo+ wzs24swsy7r76z rsycity 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 carrieskvs9) sjajf5l-xbm4 . a charge of 20 mC. The object is accelerated from rest through a potential diffj- ssf)m 9jl5xabv.4 kerence, 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 potentid y6lg4/ct l-dal difference between two parallel metal plates separated by 1.0 mm. What is the electric6dgy4-lld tc/ 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 parp95gnri fjk)elolrc cls7;2; +.q, e rallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the pnq,k+7 ;5ccr;rolg serife. )2ljp9 lotential 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 direkwy7aoma.3th d2 g )vj q(2texmb3s;,cted toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the3sm7(ag3th xvot.,q2 y;wb) 2 dekjam 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 of mk;lrm. p3x abs nc23g;agnitude 3.0 V/m. What is the change in kinetic energg.3m2nsa;3 rckx blp ;y 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 bht mb1 0xsssm,-a3r 2py 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 1.50 m from the positive plate, what is the potential difference between the initial and f-xhat 1sm0r,m2 pss b3inal 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 connecteds3;f0q f+ x*j3 p w 2f8cq)d-oylqcwca 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 does the elec8qj2q+ dwfolx ywp*cf 33-; sa0f)cqctron 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 batteryy: ..rqbka t,f. An electron released from rest at a location 0.10 m from the negative plate. qtfbr: .y, .ka 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 the east. If ta7 tt)s-3gwt qhe 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 east of the poin t7a3t-)gstwq t?

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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 taz0kn2q6q (lbhe east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at(ln 60z qqbak2 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 difference of 12 V, it wilj mtz5q- .9:v;hfygon. qztria6/l t-l acquire a kinetiv;/ gqlt ortz nyhj:i9-.m t5-6.zqafc energy (in the absence 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 rdz0g 4 x(-j0b ad*0 sd+8ybfy2vr rlqa 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 vmy6t4 gm3 q:cstick. Find the electrical potential for th34ymqg 6vtmc:e 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 cuo bpp 3603zy8xbgew( harge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electr6 38xzoug( y0bbep3p wic 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 a -2.0-nC charge isp2 fi q odz8tf)dc yg46gb*b*; 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-nC charg;6*q8bdf i *ycbdgpg z4 t)of2e 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, 07 fn mqcf fmnt6 7nq5- zz;vc1zd0b*;l). If the potential is taken 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)?7f-mnn5z6*mcq;zlfzd0 q nt ;bc vf 71

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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,p2 cbuypw m+ ;st 6zp(c0cwy; +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, a = 3.0 cm, and b = 4.;6wtpp mucb (w2 ,0z +yspcyc;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 placewwk j-+goap c3e*w 7q1d in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3koqj+eca7pw1g*w3 -w .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 0b q0hvo3d /av+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 place three charges, each of 2.0 mC, at the cor36l0uu em-fccsmx .j )ners of an equilateral triangle of side 2.03cse0mfu.x j) u6cm l- 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 chargv5i 8y:*m xraaufm 7,oed to 100 vy5mu xaf, mi a*87or: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 i68tp7ru5+m ymhfyi8dcp+ 4tplates 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 capacitob1t3f 31/ xprte8wpswr is filled with air, and the plates are separated by 0.050 mm. If the capacitance is 1t wesppr1 /3w318xtfb 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 capacitor has plates of8q b4p3rzo v .w1kzcz. 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 pl /dt2kg9yx in.ate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what i.ntykg i/x9d 2s 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 connectsp)w76 kj ;a ;bnsf)ated 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 from the battery, which remaine)s;p6ak 7btn; swa)j fd 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 capacito:,nr xot.tzripfaksm8 r/ c h/,3 g-4hr. How much energy is stored in the i./x,4rg-cprft as/,h:z n8 tr kmoh3capacitor?

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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 thex60wa lmw0iw bn*1 t c*.z1xlu energy stored in the capacitcwi*wwuaxmn l 6zb1*t x l.010or?

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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 mj*carpz 9 2v yy;jq1(connected to a 12.01a2qpm(y*;z jv rc9 yj-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 charge6bmy9cppq-v5c p7hl :d 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 platlqejd5+ w -o+atf7qn ;gjuv 17es 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 capaci-h+: y cfzwp :d3712fwn uyqtbtor 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 pla4m;u 4bb,tb6 v cna0w. md*libtes 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 i e v(lbml+p4: xypl:-v y4v,jss 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 capacitoryf y7);9o1e in6wf6tl(z5 ar(fqid rr 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 c ja q:z(rfg;:fp/n8hronnected 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 dielectric constant o qgrn8;hpj:f ( r:/zaff 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 ays4n uc+aaxp y*)h z:hn;js4,nd 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 diel*jys:4nn,cy sp+zu4x )ah; haectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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