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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 7d tgo8x- epr;nkg5dm*2i .1eklar 4hector?

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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 i4oz,p8ike (qfs 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 ob odc )ef.n--4k69hqpnne5xffjects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at ax 9fq-6n.dnon-feepf4k c )5h 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 tle:p9:5j (jb1 avimh 9yy x*sche 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 +szs-ldj hbs 6ny ncjj6d 8)51+f5 pjuopposite 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 sphercz*/a:t: b3 vzxvwe hbv/-b qilt8o;8e. 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 from rest to a speed v by a 500 V potkii y6ql)bqh+d78dp3 v1u2)elsd lu;ential difference. If the potential difference is changed to 2000 V, what will the new speed of the ball bilel2)3uipvuy 7 ;8 +1shdd bqqkd) l6e?

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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 poten+yug70 n+gd oitial 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 poinn ot k7ek 3)1 fhtz7ae3c p-b(*lcm(mft A to point B along an equipotential surfaclm f 3paho1ztctm -*3 (77ee()kkcbf ne.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential sur.fx0z g s 03cp-(aq dhhle83nkface 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 that on the electr8:b sxjv f-)tqip/m9p51ntz52 vrfp ton as a result of moving through a potential difference of one volt is referremvftn5pr 59t1- sxfp/)tzqv b82 p:i jd 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 uz3ul(d . ktpg:tk1mxgk zr 9+6nit 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 corresxbzfii(.6pau 1 bd rg f.u*q-3d i3da7ponds 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 y9o5ufzu 9e-j(pme-ea positive point charge is 100 V. What is the absolute potenti9 f5uu(mj e-oze9-py eal 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 2.0wmh)6 zuw,s1fndfc:rb2x4 w pk-r06 p m from a negative point charge is -100 V. What is the absolute potential 4.0 m away w4kxwn 26r6bu ds1z)w,pfcfp0-:m r hfrom 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 square3pb6ou: 6ciwv is 3.0 V when a charge of +Q is loca6wopub v6 :i3cted 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 +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 f:,dwse7n q l/charge of +Q is located at one of the square's corners. What is the absolute potential awes,7f :lq d/nt 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 that are sx ez7 2xlyo/d4xp3;* a6hmre

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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 hif*bo474tty3 )f pbd 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 th8 rzvlm y ;jgdyson73mge ) yg+0px0 ,e-t,(meat one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitan3ggg m tev70;e(8,ejl o0z- nyy ,m+prxmds)y ce

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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*vurn-bc 49l b the plates is doubled and the distance between the plates is halved, whalu9rbnc b v-*4t 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 capaciz fbl(b ob1h xla6milx60rqxl9h8, ( *tor 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 xlbmz hl6*x9x,0(1 h 6bafiq bo8rl(lthe 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 fielxxrv4 l, -hkw.*1fp hvd between the plates of a given capacitor is weakened, the ca 4*vhf xh1kpr,l vwx-.pacitance of 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 maintained with constaig )m6r n56*nkwdvy b:nt voltage by a battery as they are pulld6)bv: n5gn km6*iyrwed 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 constant voltage+r4 msl hyx4b7 by a battery as they are pulled apart. What happens to the str+ 4s7ymhxr4blength 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 betpfermlbn4d7/y( xm3 8 ween the plates of a capacito nyfe rd 7/b83m4(mpxlr.
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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 pla gmzf5(w )nugr+m2;iu tes of a capacitor. What happengg+ frmiuz()w; unm2 5s 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 materiaqv(6 8-yqjsu0 z-,a-yimo m0:n1xy lixdhk/al such as paper is placed between the plates of a capacitor holding an -, mkvzoum8y yja-q 0i1ih d-/lq0:axx6ys( 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 puoo+g u6lj9ftm/ljx 7u +.1dconnected to a battery and becomes 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 energ9+lj1of7g6+ x/topuud j.ml uy 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 causes the x( wjr4g8;m tpenergy stored in that 4wjmg( p;8rxt 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 causes the energy stored in th7h0 2wdwas pc.at capacit dwcwp2h a7s0.or 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 c7v d1*r5s46od:zwmzo /1 gyk/c cba 0mzbk(pqharge from point A to point B. What is the potential difference between p14dr bwz6 mgmpzys:c5z (c*o qbdvk70oa/k/1 oints 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, wherersqzu+grhoqgdk(;so86x w8b 4)wd3/i,s: dv the potential is -50 V, to point B, whervoqgk8)( z8dbudx s4h:/w g;dwssiqrr o6, + 3e 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 accel0h( ,xur:n q tkc6r0ijerated through an electric potential differencet k600nx qr ,:cirj(hu 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 7oa)8ix mcrr:accelerated through an electric potential difference of 500 V. What is the speed rx r)c8:ao i7mof 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 difb2xxh95dnde 7e9 p/d(aqy s3)kx fxq)ference of 1200 V. What speed does it acquiradsxqxdnhb 9d)xex5 eqy/p3 79) (k2fe?

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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 9kuc hujst/o)h; v;z 588s2 ijz.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 accelerated through a potential difference of 500 V.p :qnn *ufq hym;(7l-m Wh7nf :un m( p-q*hmyl;qat is the velocity 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 carries a charge of 20 mC. The object is accj*kkdqglnc9,hk:.. g(aik ilw)9n ; y elerated from rest through a potential difference, and afterward the ball is mo jl :,c9nnh)a;igkli*.k 9.kd(qgykwving 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 owcm/xt 1v*ig2ank 8(vrfs5:electrical potential difference between two parallscg t 8k5vfro (2xa/vm:wi*n1 el metal 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 500 V/m, i oeid6pd31z:slj ji2z0 *v.vms directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0 m?1i20ij6dvzdj o3 sv m* :lpe.z

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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 diren2hzm94hdqp:econ;4 cted toward the east. If the voltage measured relative to ground at a given pn:2do qnh49 pcmeh ;4zoint 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 1f2-j1ag i7ctszjr )fmagnitude 3.0 V/m. What is th-1z jafj)gc7r 2tsf 1ie 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 12-k*rh ,jbm s(t*p/jfw j+)2obr 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 fih, jrjjt 2brfkp( s*)*+w/ombnal 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 connek +rhb;ayuow:at:si85- gtjwm)9il. po2o .m cted to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electro.rlhi:ayw8m5o 29 woijt tgma- u) ;ksob+ :.pn 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 0tib sz7doiq)g)up( ;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 0.050 m from the p0 bd))t(pu g; si7oqziositive 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.( yi04gcene )fs9 of*j 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 directly east of t* 9egye) no0(4fsfj cihe 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 fi63pzk a/bxa 60idn5 9ucjf;i9zcrhkbc hd: 55eld of 50 N/C directed toward the east. If the voltage measured relatcn:3ba/ ck5d udbzh x965i;k65jhfp ar0 9 cziive 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, it will acquire itt c zf4t2g4azt*0/w a kinetic egft4i 0ttz*wca2t/4 z nergy (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 a distanxdjh7 hgyg4( /vd2by (ce 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 meez3bog4+ /v6v)ruusx ter stick. Find the electrical potential for the centerz uox vgr)u+es4 bv/36 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 (3.0 m, 0). Ifqk+g5f xli m78up1.y j the potential is taken to be zero at infinity, u+ yk f gj5l7m1qx.8piwhat 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). Ifu;wf/x3c8 0ke 6bbwd a the potential is taken to be zero at infinity, what is the electric potential energy of a 3/u;d8wxebc a 6wbk0f1.0-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 the9fitr4:frg 4b potential is taken to be zero at infinity, what is the work required to brrfbf4 4:i t9gring 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 oukfyt8 53z:uh t) tuz3,zttf7f sides a and b. What is the potential at theu z3:ft)8 u, 7ttyuk t3ftzzh5 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 kqn+xls157n ydiagonally opposite cornel 7yx+ksnn q15rs. 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 ++/1jyxwu1nzsjh)g on j vf i, q6qw34.2e, 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 34dxjbc.em4l,l l(u , ekvw3rcn xq 64corners of an equilateral triangle e,(qwxux b33jkl6cv4dr4m 4 l nel .,cof 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 plat-cmc1)vb h fp f82cw8r)htf ;wes of a 2.0-mF capacitor when it is charged to 10t8;hfmr w-fcv c2) 1)c8hpwbf0 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 pobq hhbb:+97lj5vpjr 345 u h;i;l a p7;lruuklates 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, axoj4hy1ox /6 ind the plates are separated by 0.050 mm. If the capaj h 46/x1oiyoxcitance 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 has plates ofq+ s-8v3p okhd 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 tlhcp859amwq-npz:/ of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field bet :cqh89 azp/-ntwmpl5ween 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 capacit-/usgohsb1wkj3vh gdy w+74s4n g u8(or is connected 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 remained connected during thshsung 8wsh447+wg do/ -uv3j (1kbgye 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 capacitors3 f x(* i2k5/x(xzt1ukoarsr. How much energy is stored in the c5 2soa x 3kus1rft(z xrx(ki/*apacitor?

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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 capx4 0gdjxc95 pmacitor. What is the energy stored in the capacicm 05gjpxxd94 tor?

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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 o *cpd v(gju);.phe( jxf a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this ca(.vdux)p*;g p hc(jej pacitor?

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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 a,-rc;5ovwni(,5n x3tcu*mbmakl 9 5 uhj 7pa 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 plates of a)j ld 7j m7bc)bm.jv6area $1.5 \times 10^{-4} \; m^{2}$ 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 plate;x0 :j d5edybzgq 9)qr,k cak1s 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 platehhg3vq:lcq ughq82adw1090dm y 8 .c gs 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 conng/m;ig8e:4y na j/xustructed 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 constm8n9pn xn2b 4nructed 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*zx (y5 wh*qf)mrv p;r and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between thh)wz(f** rvmxpqr5y;e plates 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 connectj8yb 4pj9jj3med 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 pj3mj9bj48 jy 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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