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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: 游客未登录  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 q)kq*xnw)1 6 wyh bq.zvector?

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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 iq8y jss:en,),lhp 1xgzo-va)(n mqm(s 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 insulatedubm, vot -*-sa from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher , vmu a--*tsbopotential?

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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 :-4tv xe*cu ui m,n/vwthe 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 tnz;pc va tl d 8aa6n773 5s,rebph5w4ro 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 cofq+fda d;b7ry5w:ty+ nducting 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 from rest to a speed v by a 500 Vyw8 s,q,bz 1bc potential difference. If the potential differenb 8, qbzycw1,sce 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 ar zl94sx-gv k.ce at the 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 pointb)(ijgmi3 zzro1-,an A to point B along an equipotential surfacem j13(o nb,)-iizz gar.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mus*p9hzhdj7k. lf/av ;ot 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 chargev rq2elm(;k6 *az nx3v equal to that on the electron as a result of moving thr2 xmvv ; rl*z3k6n(qeaough 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 is55gl1a + ycmxozr+4g b 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 co2xaib1 s,ehuc. .8f yerresponds 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 fr,w cc3b,zat-/ wflh.bom a positive point charge is 100 V. What i h twf l,cz,b.w-/3abcs 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 a7ff-bx0e 0uarv)umpu1; 6 go distance of 2.0 m from a negative point charge is -100 V. What is the absolff 0ugeu 6o v7-0xmb)1 rap;auute 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 charge oi/ fu 0zvpxd;rw;irk3n9)- fgf +Q is located at one of the square's corners. What is the absolute potential at the square's center i)vi; u g/xdwrfp93;n-f z0krwhen 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 sef kf3jm -er66quare 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 a sec6r emkfefj3-6 ond
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 chaxrnd- (z87 lyjn,a+f lrges 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 .6h dvuagqa +,4 :zetha

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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 evof+n+fqgw97c jn x/y 1ery respect except that one has twice the plate area of the other. If the smaller capacitor has capaqfj o7wncn /yg1fx+9 +citance 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 platbl4lbg - g 3c+wq7,lcies is doubled and the distance between the plates is hglilgbb34c,7l +-cq w alved, 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 then is removeds*f1m*6 l deet. The plates are immediately pulled apart. (Wil*fes* t de1m6th the battery disconnected, 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 of a given capacitor i hvwv7qzy (s k+8e(tf85r)tobs weakened, the capacitanctz(wr ofs(vbe)7+h5kq v8 ty 8e 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 constant voltagecrjeh4/ysc y/m /rg 33zalblk2) (: zw by a battery as they are pulled apart. During thi3awrbgr/l szz (y4my :c/ /c) ej3k2hls 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 capacitorv:cgqdpy-6 t- 3pux4x are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this proce34vx:6g ut qc--pxdpyss?

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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 tiwiuu)b6stbyg+d q+fa; 26(o 9y5tta capacitt to gf( q;aws6itby)+ uyi6t 9+u52bdor.
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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 platezm9xyk;pv nxjt +. et52i)j r.s of a capacitor. What happens to tr2 v95t m ne+kxitpj);.y.j xzhe 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 * (ceh: rvaw.cplaced between the plates of a capacitor holdin.ce av*(c wr:hg a 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 cap0g)/vsm pntfj 0p i(w,acitor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way tha0(w i0f tngps,v)pjm/t 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 holcn0smj .c:/ ceding a constant charge causes the energy stored in that cce:s /0nmc .cjapacitor 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 capacihkz 6 / 7nbze/h;8udvi2*zzpptor causes the energy stored in that ch; p7*62ze/z/ k z8ihpbvun dzapacitor 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 to poinz4jsi)oy m,oz6)6+ ovdlqqowe;t / 3 ct B. What is the potential difference between points A and 46wctdz+ m);36z qje oqoy s),o/liovB?

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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 movig +c8hzq+m ,khiknk1-ng an electron from point A, where the potential is -50 V, to point B, where 8h kg+z,nkch +q -1imkthe 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 res3qmrv/hz zih l92da:1t, is accelerated through an electric potential difference of 500 V. What is the kinetic energy of the proton? :hrh9qz z12/avim3ld

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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 t)f-k gs/s4m s/roelw+hrough an electric potential difference g)w4-+/fsers/k l mo sof 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 axm,sl 8i ue1 (ksqq-p9 potential difference of 1200 V. What speed does it acqusqqlixks-p ,8(1mue 9 ire?

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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 i);r k89wod0wns o:i2zn +nr lsn 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 differengmdm n(p b98z1ce of 500 V. What is the velocity of the ep m (bnmgd918zlectron 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 2ajv1: f,ccwb accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is t1v a2cwfj ,cb:he 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 maintai hi(l d3tzdi,0ns the electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between zil,hdit0 (d3 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 magnitude0q ag.pdsmrb0 b6g6/b eb- (il of 500 V/m, is directed parallel to the +x axis. If the pi/r0pg(bbb6ga eq60bd mls.-otential 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 directed tohrmmg6.xu09u 4u0 o(zy6aj vb ward the east. If the voltage measured relative to ground at a given point is 80 g(m6 u0xbjuu0oz9y4ha .v6 mrV, 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 fvq 1jpklh. u-3ield of magnitude 3.0 V/m. What is the hp-3k1.uj qlv 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-V battery. An3 87 8pp4j/ sc6o lpp, dpuqg/vbl/5iuqk rxm4 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, wh v,s/g j6 uc3/8llp8p/up kqiq5r44dp7xbom pat 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, ar,5 19dwniy sgoe 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 thein,yw dsg51 o9 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 tosv:o8(60t 4fglpj/ ch ot/u ao 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, what is(4ojv 0fh/8:p6csluoa/ got t 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 ele0wq45 8ajg0i iorc k /5yhe+2.sprrnsctric 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 volta2y5qij rnr0a.c4 kso5e+gp w8si rh0 /ge 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 directplx:)lh j/ujo p0p1 ;eed toward the east. If the voltage measured relative to ground at a given point in the field is 80 Vu pho/ l pj;xlpe0)1:j, 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 potego85 ,-qoa/0uf gbd wkntial difference of 12 V, it will acquire a kinetic enkg-o8d/,b qwf a50o ugergy (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;uqj98ycj.+ lwi*1xzool7 l e:zt 9ej 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 asi f wu1,j za*-w1p)ej vk0i :/0jo2oo2b wqyat the ends of a meter stick. Find the electrical potential for the center of the meter sticaf:pziko wui,0jj 12w bw10aoe) vjy 2 -qo*/sk.

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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 c2s j ow/2o)t g5z 3a6qw sly-w*bxcwt2harge is at (3.0 m, 0). If the pote aw5-wc3zlbtsw2o2tys o6w2qj/x )*gntial is taken to be zero 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 a jp. .zwu;fqw+t (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential;j.wu zfw.+pq is taken to be zero at infinity, what is the electric potential energy of a 1.0-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).,ai )82 ykjr ;lv6 hg(kmxlr:a If the potential is taken to be zero at infinity, w2(: hmv)8r grk 6x,kjai;ally hat 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 rectangle ohr u:g8jj9r7hf 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 = 4.0 cm?9j87rrg :jh uh

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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 ml4+ y0exortd w b2fvr2i6w/)two diagonally opposite corners. In the other two corners are placed chmo0wwi2bv f ex/ d)ty4+rr6l2 arges 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 tqz/ks eu cl92:ekycao)l:(,$6.64 \times 10^{-27} \; kg$) 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 tvuvf 0 0daz3 1v)rlh6r8ch ;mahe corners of an equilaah3dh0m1vacvr0u8 v;frl z 6)teral 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 it is chargedsv x* f8 j anlvrh x0i7,gvk4:n(wc5:p to 10 cv 4hnlav,:jw7(n0r58x vkgi:xs p*f0 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 capa)bh bu7e+/ojwr yi+f8citor 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 with air, and the plates are separated by 0awo3tlxz;0 ;a*xfk5son 3 ak2 .050 mm. If the capacitance is 17.3 pF, what is tkk a taa5l o0z3w*;3o;xxns2fhe 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 of area xcclvpd.j:,l- u68c y $0.20 \; m^{2}$ 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 o*3 7f1crxfbt zf 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 between the plates?3ctzxrf*1bf7

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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 a 1j/o5sxcq5 ;ulops, z ),vbvi800-V battery. After the battery fully charges the capacitor/ l u5pqvsooi ;jvcx8b,s)z,5, 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 is stored n k, zdy6swr/*in the cap6snk/ *yzw, dracitor?

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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 the energy stored in t+ kw/dlqmkq/ : (zb:ca;wz3bs3 2pmpjhe capacitor?s /3:q w2z/lapcp 3bmw bz;m+(:k qdkj

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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.6oqty ;fmwdo pv2+84u-gkt f the plates of a capacitor when it is connected to a 12.0-V battery. How much woy.t6 og8 4-fqpv;ut+o2 wkdfmrk 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 charged la,svyy*ti0 q20 )nv jso 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 ofc-6s4 8kcj jez 9ej;p7+xfy mt 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 pb+ql6koul ; )wlates 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,+hx f.ajlls1 bwd0ywwxj83) 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 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 a4/70bd1 cs2 l)8ri vyi g/x4razvbp vjrea 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 aej gs* p/o42hco-8axg rea 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 and becomes fully charged. q e 3vr+vxg,fr3k9c z..ox,ff The battery is removed and a slab of dielectric that complf,c,3fo3.+v e9.rzk vxxqgf retely 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 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 becomes fully charged. 8voe/g )ets5 wf5i.oe The battery is r t8sevw.5e ioo)5/f egemoved 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 voltage across the capacitor's plates after the slab is inserted?

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