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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 da,;qryiez; f;c)xko5 g un20not 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 coulommducwz5, lj-e4b) pz.b 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. Obtlf b24tywin, qt(f4n- :i +m6u/dhnvject A has a net charge of excess electrons. Object B is grounded. Which object is at a htqwmlnf2nf(utit/nhy6d b i -4v4+ ,:igher 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 inwyk 3iag/vs33yeh9g): uuzgnv/v 2u x7pq9a1 the direction 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 a direction opposite to the e6l3r lgqs+ 6hut;m:jk lectric 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 conductix t4z l4izzbp+n8z9e ;ng 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 accelt7 latqroqge3 7 4 oo0bn+p p9w(v8m6oerated from rest to a speed v by a 500 V potential difference. If the potenti3lt q9oq ppg(eo 8oa+ rv77nb6o 04mwtal 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 potent( 6;mvb o,b4usoogx i6qc sp44ial 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 p 6rc1uphp0gvz , 3/szpoint B along an equipotential surface3ph 0,s 6vg/1rzuzp cp.

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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 be;+dxay hc96xt ua0u mcnk5y 47

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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 aj15(lbze k i7ac gam3: particle carrying a charge equal to that on the electron as a result of moving through a b1j( l7:kca5 ag3zeim 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 unih 6x k.9tfg.b53 agvmp8kry4wt 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 corresponds tq,si79.g4kwcz +ymba p.gd )j o

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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 *nikea v p7uxtd5e3 /9a distance of 2.0 m from a positive point charge is 100 V. What inp7xd/3vit5ke ue a*9 s the absolute potential 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 from a negative point charge is a9cy3cuh , k;f-100 V. What is the absolute potential 4.0 m away from the same point ;9,hc auyc fk3charge?

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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 squar5 v p4cc6d0bwoe 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 c 6wocvb0c5p4d orners 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 chaun;67xdoc7h.qa*ut u rge of +Q is located at one of the square's corners. What is the abs6ut7nc .uoda*;7q xuholute 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 coeo yv- (,ex8nsqrr2h 416d fsdnsist 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 z2 l8 p )lmy;:7mjkfouad9j/zis 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 t )y b7cdlt8)nrhat one has twice the plate area of the other. If the smaller capacitor ha yl8))cdnt r7bs 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. If the area of the platoeb1a +b5q0mycor.x2 b; bq w2es is d5cx r+o ;0e2byabbow 1bq2 qm.oubled and the distance 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 capac ymfq kx*us:sk:,6 f4zitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates4k f, :qksu*zymf6 :xs 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 of a g9lanv71xvpm b)0x1h *ji tfl/iven capacitor is weakened, the capacitance of thatbanifvhmx07 )1v91 l*/jt lxp 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 maintained with constant voltage byf9;0ffc+ : tvrg;38bhvul d2z;m j)u+kmcyp g a battery as they are pulled apart. During this process, the amou):mgzbjc+ dlt pff k+9mr3 vc;u f v8u;gy0;2hnt 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 capackby y+dqc3gf9stws,-ezf pkf40q, )j w:6b3v itor are maintained with constant voltage by a battery as they are pulled apart.9f s3:)sq4bywydzqv ,0 bgpefk+-j,t c6k3fw What 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 f:6unr m7 cucezsn6kh6 thw8w/ 8vj/ *aor adding a dielectric material between the plates of a capacitorcw8uh:anmw7u6/sve* 6hktjzcr8/n 6.
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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 between the plate t3pjrl02ua( hs of a capacitor. What happens(ar h2u0 3jltp 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 i df;-:m-yt xor(7uiias paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric fieliit-d-;u o7ir:xfy (md 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 becomeevg;0:j)a im5hc w j3l.l3cz ls 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 energy stored in this 5; i:cecm.hlg 0l3ajl)vj 3 zwcapacitor 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 causes the en 42sw)46 sxplq-ks4qxi ) datiergy stored in that k)li4 4-w 6 4s q2p)dxxastsiqcapacitor 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 causes the energyh m-dt( u-40wdsatt0h stored in that capacitoth thst-0d 04 aw-(mdur 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 ul -5h, qsmgj6nzsu)yr:i ;t-point A to point B. What is the potential difference be 5t6hzs,sq:n;jruu mlig)y-- tween 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 potential is -5uk 5 yjlsc -.vs-5mm,/ ptp7me0 V, to point B, where the potential is +50 V, ivtsy js 5m5m,/uelk.-7pmp -c s

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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, ikoqy; :w./1e;u4l)p d lrmudxs accelerated through an electric potential differenc;4xo k;qlmd 1e )w:lupur/dy .e 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 accelerated through an electric potemj ko y8(w+u31u:gohmntial difference ofkj+o :o m13hy(u wgu8m 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 proton falls through a potential difference of 12si50kw. m(efzcx: w)e00 V. What speed does it aiwexk0 wz) f.5(:c semcquire?

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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 movines)j/ 8eck ei6g $8.5 \times 10^{18} \; electrons$?

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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 throufb25 fdf ujentwbfh*00 bd 79;gh a potential difference of 500 V. What is the velocity of the electron afterw0bfdffu 2d ;j 9 07*ntwh5befbard?

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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 objectiy;y- ; .cto4 zgorcs* is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of theo.zr;ot ycgy ; s4c-*i 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 difference between two para,3) jeuonpw ly5 zey::j8ua-)j r(q rbllel metal plates separated by 1.0 mm. What is the electric field between thwua,bj(jr:)p u)8lyenr-3 : e 5qjoy ze 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 5zu /g-se hv*ga magnitude of 500 V/m, is directed parallel to the +x axis. If the g*h5- seg /zvupotential at 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 df:5aj u-k 6fc c3lfdc.irected toward the east. If the voltage measured relacf-.c 35lffj6kauc:dtive to ground at 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 magnitude mk+7f2pr22ad vmm)f e 3.0 V/m. What is the cha)m madk2r2pe mv+7f2 fnge 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, separam4 ;6u2nza npnh rkgk . z;r6fq5i6e9zted 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. When the electron arrives 6g9nk fzr256; nuq 6nmizk ;hr. ape4zat 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 battery. A8y..w*jo tib 8hvx7hd08d nu xn 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 electhj ty 8*.0iw .xd87bdohxu vn8ron 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 battery.-ob fk,-e+zt 4jv (sayi 5h(ef 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 pl-hzt os+e-ibf(f , jy5(va4ekate, 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 d*9rfu d tzvpc :e947y84howu eirected toward the east. If the voltage pfcw4he879vu z *td:roy49e umeasured 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 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 electricu,t9: 2xrz voo field of 50 N/C directed toward the east. If the voltage xvr9tuz, 2o o: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 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 thron18xze 8cx7xyugh a potential difference of 12 V, it will acquire a kinetic energy (in the absence of fricc8z xx 8nex1y7tion) 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 atl-yjf2(g b cv8 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 ends of a metz8.wz cfugly 4r c h+ldh44d0 tjd0o**er stick. Find the electrical potential for the center of the mett 4dchdw *.4f0* zzulojh4c0y8r+dlg er 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 m, 0)wy /bfvg83 c7gjo 5tc:. If the potential is taken to be zero atg8c3tygvf7bo/ j5 :cw 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 a -2.0-nC charge is at (3.0 m, 0). If the lu.5 -ldl4w 1jijfv s 4ci*/tmb ci23epotential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at poin li2.4/iwvdcucl s-flm53j j1*iet b4t (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 (nlz7 y0wy,,hln;r tl33.0 m, 0). If the potential ;rt7 lwz3,nnlh 0y y,lis 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)?

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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 rectangln 0g,vn9l.6wlz t+i5 .xgxccf*pk a,se of sides a and b. What is,.vc6np gk5na lw x.xi9lg+0fz,ts*c the potential 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 a side. Charges of +4.0 mC are placed in two diagonally ow a7+xxa/ 4ii8+proi /fwd 4c1url1wdpposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential ix 1 l4dd7wf/ wairi4p+uiw+a r1xo8/cn 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, mas i)b.sfet e2(xg q2ax 03sd+eds $6.64 \times 10^{-27} \; kg$) 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 ma*s835jjzjj.ek 9f7 gfp1d q qC, at the corners of an equilateral triangle of sik djqj fj1*9qfps87ajgz35 e.de 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 ith ivm //dc)w,4y1fby/ ypiz)/yuk4zz is charged to 100 V?1zwyz/iy /f yc/)i/d 4zbphy m)vk,u 4

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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 fl-jx42cb / rn(; pf08hejrzx 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 with air,d tl4ga5ro c0 oo3nh j,27api2-;gq iq and the plates are separated by 0lgjhqa3,7p io0go d;522tanir- co 4q .050 mm. If the 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 capacitor hasxo9bz* *gmcf0;a 2q rhjf7ht 0 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 2gu db1m;e( fchas a plate separation of 5.0 cm. If the potential diffe2bd ue1(mc;fg rence between 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 connec3i*l v)) bxzc8ohcesm-+ zhk 8ted across a 100-V battery. After the battery fully charges the caiock) )*3eczzv -b8hml8 s x+hpacitor, 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 qdy2gutih3h p0 g3vt)5(yp) h is stored in th(v)5gq3u2y h g0ih p)hdytp3 te 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 capacicgq3 0wg7xnd(z;*ry etor. What is the energy stored in the capacito 03en; grcy7gz*q dx(wr?

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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 capacq ,qpr y,gs yo8y r+c)l;pg-3jitor when it is connected to a 12.0-V battery. How much work was done in charging this capacitocl8pjqr 3 yg,pyy)-,sr+go q;r?

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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 lofhje5b ws0y8 ,g:9-i x7osi is charged 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 consrn8q nvtv5;ij3 t 96lnists 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 of plates of ayya ;ms/7:psz rea $1.5 \times 10^{-4} \; m^{2}$ 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 o )zc.,8 /unw9 x h6hvpzmng1cxf 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 const2lw yxousg7 ++fb/kc 6,jdqk4ructed 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 onzr o( +5*bofhf $0.40 \; m^{2}$ 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 5 bddyr87z- poryo :.;q0-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 of 5.0, what is the capacitance of the capacitor after the slab :o. ybdz;-p7oq8rryd 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 becomen1/ htx*2zrlt 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 hlx2zn *r1t/tdielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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