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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 v waj(52g5xyr acc;9)vu otx ,jector?

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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 o ow .e :twx.liy:my m;:a3w5/; xjfvris 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 fromz5 lk4()t)kti i ji/bn their surroundings. Object A has a net charge of excess electrons. Object B is grounded.ik (nb/j)ttzi l) k4i5 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 the electric fieldfyj1xw+ m)h+d

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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 directx2 nr.tmip; o0n*w)3 ;oycx ajion 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.- eo+h* hwjh q7 kh4riyuo6c8 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 frohc4r.) rbh1dtm rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, whr1rbhdt. 4c) hat 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 pote+7 ae tlm*:au.ge cie)ntial 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 frez59jm r6;1w clji -oz-;mtB along an equipotential surfacm6ime;jjfo1 t r -z;zr5lc9 -we.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mustvj l-)7w.d bjd :*4zvh4zg vnv 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 ch/a xu27k l4o/nurjyy3 g7ul)narge equal to that on the electron as a result of moving through a potential differe/j4 un2 7lk7/yg3yuax n)rul once 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 hle0ir*ngjy3g0 o( 32oa s 23s4vneg cof

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresponds .ob:8zu15 fa , vzefqoxe/z-i 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 gygmsd;8s;3(b(xnt r point charge is 100 V. What is the absolute potential 4.0 m away from the m;d3gssn ;bt(g y 8(rxsame 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 negative point m72gl4 fxw )/drfrtc.8 sa/yz charge is -100 V. What ia)2g r4z r//lycf 8tm fxdws7.s 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 center of a )xibxpil3g yid9+(+ a7 p g7rcn gg21esquare 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 pxlp97a+riiiebdcxn gy gg g2 1)(73+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 qceq4 f7,y:tucharge of +Q is located at one of the square's cornq, :y47 euqfcters. 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 consiiblmh399ss/r,: tp i vst 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 is b1 :xz4sh g: 7-xoqqqxa

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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 hao f rxv) )lgg 82fmh+hr28cw4rs twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitfrwghrg28h48v) cr ) o2f+mlxance

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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 .8/uci - ampoba capacitance of C. If the area of the plates is doubled and the dist-.ai8 o pum/bcance between the plates is halved, 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 thenu1 pu bmc0*5q9saov,m is removed. The plates are immediately pulled apart. (With the battery disconnea *, mmqv9ocp ub1su50cted, the amount of charge on the plates 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 o p*u(1yy*iku:yl kv;lf a given capacitor is weakened, the capacitance o ul*: k*v; kyylup1(iyf 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 )nhp wug:ig5,maintained with constant voltage byhg 5w ,gp:niu) a battery as they are 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 parallel-plate capacitor are maintained with consf y:ev4jy 1o/jtant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this procfjvo:j1/e4yy ess?

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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 matew( lq a6rx3(yu76lwyjrial between the plates of a capy wwaj3(y l7( q6u6xrlacitor.
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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 ip((o,u pb4ijhn3 f9eps placed between the plates of a capacitor. What h4ihpu bo n(ej93,(pf pappens 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 placed nqtbz3 z5f.s-qw gfbwn *nili6 99.,g between the plates of a capacitor holding a fixed charge. What happens to the fgl,n*z w wq.z5 nf63 g9q.9tnis- bibelectric 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 andqbi7*+k4s rn2gkepzy)xm, 7 wy i9: xc becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no cha2i,r7yi+ngs cx ) m7qbpy:4ekzwk x*9rge 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 capa kg/xda* sd2;*lut5:gjw g7vlcitor holding a constant charge causes the energyx 2gg*:ts u*lwka /;7l5gjddv stored 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 ow8lyf6e/ gqpwp8/*dgiven capacitor causes the energy stored in that capy /wpof/8 g p*ld6weq8acitor 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 i8u d8lzr*5cyC of charge from point A to point B. What is the potential difference betweeud*c5 z88yil rn 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 fromq9 e45*i )g+ ol4z4/gi v hsoggh)as19 ctexbp point A, where the potential is -50 V, to point B, where *g+oh1al)9 ievshp g4e4xz gs) 5/o4qcbig9tthe 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 accelerq s xt3:hd(c jc/a-hm0ated through an electric potential difference of 500 V. What is c0m -t(h 3 j:s/ahqxdcthe 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 accelerated through anaoyu88vx* ws* electric potential difference of 5ov*88 uxs* ywa00 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 ya7u s cgfro.ty+1j7 ;through a potential difference of 1200 V. What speed does it acquire?7;s17 y+tcu.raoy g fj

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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 9.0wbm n 5fhhlon4,) 7t-pur4+zh crx9i4 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 accelerated throu ja+t:zv:,w:kh0(b t7rz yn tbgh a potential difference of 500 V. What is the velocity of the electron afterwaktbh ,va: 7:jr(t +zw ybt:nz0rd?

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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 mCf7; beug0:frulrb: u 0xcj5slw45y.58 izigx . The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magni:xf r5yufg 8jize4.uic:5b;ug ll0bw75rx s 0tude 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 +xwwaa0q2n4 b0*k uzlwe+t, ,t 1hgve the electrical potential difference between two parallel metal plates separated by 1.0 mm. Whagen+b w,e* 4k 1hqtt2x +0,wuzal0wvat 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/m6zi j z:xqm3a3, is directed parallel to the +x axis. If the potential 3 qa3mz6j:iz xat 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 of 50 N/C directed toward the ehk3f( y//rqc+hpr ,azast. If the voltage measured relative to ground a kf3+hah/cyqr /,pzr( t a given 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 of magnitudeg95 *4ev1kkccwi2ac2.n dotu 3.0 V/m. What is the change in kinetic energy of the proton icd 4tco1vu9k22n5e* kwga .c?

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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 12-wxhhm9sc )pd;;c cd 92)wd e/gV battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrive /wh2 whcedp);sdm)d9gc9 cx;s 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, are connected to a 12-V lx ua1s3e*u; tbattery. An electa;1xsutelu 3*ron 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 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 ,s 0xg (fp)g6wpm7ab y12-V battery. An ele)fxps(7w0 ,a 6bggyp mctron 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, 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.pm5v f9ux wz4e*tj,0v If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltag9 wvm5z0x 4 fv,jpu*ete 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 direcl0ymg((zzg 8h ted toward the east. If the voltage measured ym0zlg8ghz ((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 potential difference of 12 V, l11mm g7xu mw8it will acquire a kinetic energy (in xg1mwlu8mm71the 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 a distance of x qkf14/gcex5$5.0 \times 10^{-10} \; m$ 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 aot6y7(qi5 fqcre at the ends of a meter stick. Find the electrical potential for the center of tqf 7tco6 iy5(qhe 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 (3.0 pkzs 7ft)8ed1*czi g3foz(t*m, 0). If the potential is taken to be zef*gtf1zpo* 7csk)t( z d3z8iero 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 (dfiwpepb7.o+ 4 ; zz-a0, 0) and 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 energy of a 1. ;oz4b+ z p7iwf.ed-ap0-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 )h-lemtg,ph 7 8l) kmd(0, 0) and a -2.0-nC charge 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-nC charge from infinity to point (0, 4.0 ptm8 d7)e,l m)k hhg-lm)?

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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 p5 gb3yf /klqjf*/df y 5mvn/y3laced at the corners of a rectangle of sides a and b. What is the potential at th/vm3fyd y5j *53f yg qkbfln//e 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 a side. Charg(im4qf9ml kz,5-ittc es of +4.0 mC are placed in two diagonally opposite 4tq5 t milk,i9-zmcf(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 +2e, mass uemgxa 3-*+ f4fc/tk:n-e evb$6.64 \times 10^{-27} \; kg$) 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, atdp;o2 6* qq0ah(ihiot the corners of an equilaterqqh;oi thi(d0a2 p 6*oal 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 pl,7tj dc9v/ozcst8 7xz ates of a 2.0-mF capacitor when it is charged to 100 Vd jo c87,zcst9 x7z/tv?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capa wsmva5rarr.9m 7v48m-+cq ab citor has plates 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 wi m) qz37(,:*:xhvtw:lwv8zfg pxpcmxth air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what if qtv :( :7hgpz*wvzm:,3 wmp8cx )lxxs 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 o 4c:0gngfalsr w(4h;wf 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 xlo5,k7wd /p.m xgxt9 potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between/o5 xwxkx l. ,p9dgmt7 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 k sy2vu4 2)ylq9n)c-ea bt 6pxconnected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is inu-ebx l c)tk6q 2y)p94a2ysv mmersed 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 enerbwq6s p2*s5fzgy is stored in the caps56sf *p wqz2bacitor?

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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 m t (djck)6ag,por-me l*o4uq8F capacitor. What is the energy stored in the capacito-*ao(8lr ,u cdt)o 4qp6jkmger?

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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 kc, ad3exf 4tb2hedzpc:5++ra capacitor when it is connected to a 12.0-V battery. How much work was d,kt ae+z d3e4fdp+5 bxr:2hccone 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 s10vz9rnzct8v o 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 oc(b; dl g5g;gif 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 plates of are ,h-l yo,dfdzs,s,qn+ a $1.5 \times 10^{-4} \; m^{2}$ 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 consistsgf -i0sw34lfm3fyo2 awnqj: ; 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 capacitor is constriqyp2;ouu * x)ucted 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 constructed with plate area e:x 3all aoe.b. zx58oof $0.40 \; m^{2}$ 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.fuw721gaed 6ggx/h ez-z - c2z)nl hb 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 72-bdnu12/hx alzehz )g- ecfzg6.g wplates 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 bed 7:-izwivhgs2ihcu q /z8kyt 8f0e4 n4eg78 vcomes 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 0i ugf7ndy4v8:eizq i8vg /-ts7zwh8 2 4cekh constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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