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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 irtk5 8nw6,1 laynvwwt48pk.q s not 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 coulomb is,qwtzzx ps-t:qd7a 8z *v(-v7 e9wzh x 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 szi7e-7n4 q rifrom their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a highere-i4 7nzr7q is 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 ft)c0m9lbf8 a4e si vh8n;0qk,sx+: e su:btx 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 u 5.hkq92t2khjijcg-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 o ):nm+0czetjn: m afe(n a hollow 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 from rest to a speed v by a 500y7a6y9sdxdb k6z8nc 9 V potential difference. Ifs 7kd9ny6xac6d 8 y9bz the potential 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 potential5:aw8 ,alslw-y ate2x 7iya9m 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 tozm;bva 3nj*d/.*zq h rino,9 m point B along an equipotential surfacem*n.zr qdvh3*;9,m/oa izjb n.

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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 or vi24eq m7ar8wqp 2fz4( xu/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 ele 9v1loqvwz08 j+d6md sctron as a resultvdvl dq68 m jo091+swz 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 aufazxix 917)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 corrn:j3gf)o /nh vesponds 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 o .df7gndrs. 6;epkuc- f 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m aegp n76-k;u.rs.d cf dway 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 hik0-2el-xfkogf wks ) z v c+h216u)vnegative point charge is -100 V. What is the absolute potential 4.0 m away fr)oklk s2 vv2ui +c61wfx-)h0fz-hg ek om 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 -bz)b dzype3n b88 ,xocharge of +Q is located at one of the square's corners. What is the absolutpz3bon b88,-dzb )exye 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 vn, (p -lg2pct+a rke(-o u+ozat the center of a square is 3.0 V when a charge of +Q is located at one ofo c+( 2eunp+rvkgpat(-o ,zl- 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 tof8y 7kc0zeye.:m8y h:- zqerwo 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 voltrs:41yp 9ew vajd (klrt:,,ml 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 identi1;bsj27c qovvn1 rrt1cal in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has cjcrb1 rvoqt7 11sv ;2napacitance

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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 hz6 +fabs aep7d(xv7-* v 6lnegas a capacitance of C. If the area of the plates is doubled and 6l(z- a*6ad vx7se+ pg7fvbenthe 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 capacitorhk,jit frkb(/ur c9;7 fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.)uh(j;/krkc rb ti,f9 7 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 is weakenedlpf*bk8( /hp; 6n iqsg, the capacitance/f8spik(phg 6n*;l qb 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 voltageqm/+zplsome/d s.h,1 by a battery as they are pulled apart. Durimz.1+/sqme d/oh,sl p ng 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-p8;swa ne5ng*l , fo+lelate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the elecl ng w8noa ;+,ee5sfl*tric 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 ca7dv (6bd+ h2. zrhkaau06qw uupd uh(2 akq7. awur60hzub+v6dacitor.
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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 az h;fk .,qfyl6s paper is placed between the plates of a capacitor. What happens fkyflzq.;,h 6 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 mo5/* q kzhjk;between the plates of a capacitor holding a fixed charge. What happens to the electr j z5mh;kqo*/kic 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 and becomes fully ch*o6xpdwjerr3+ xt1 (j arged. The capacitor is then disconnected, and the separation between the perwt*jr x1odp 3 +x6j(lates 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 holding a constant charge causes the enjmvue7v 54i k*6u3culergy stored in 3u m 54v *7eluuv6jkcithat 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 s40tb p)t//1 okrnphyy tored in that capa0)ppo 4 t1 byk/ytrh/ncitor 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 po9y *x*,nr(lnk jksb ;)m2ynnyint A to point B. What is t ,;nynnj2kbx yr()*m l9 syk*nhe potential difference between 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, whd4 ,yw a..sjnvere the potential is -50 V, to point B, where the potential in4,vyj w. da.ss +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, is5t+wwv 6zjzw;jl11(-owk qixv ,h fr ) accelerated through an electric potential difference of 500 V. What is the kinetic energy of the prozr w) wqjv1xwv+,kz;t51jf i -wl 6(ohton?

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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 throug+.uwxs/ ,f,ikaep 7xih an electric potential difference of 500 V. What is ix7/ + w,.apfk uxsei,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 of9qbaz/mwjc, 7:fe n y/ 1200 V. What speed does it acquirz/9ny :/ ab,w7jceqm fe?

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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 9k nk((oo/f lqr j14z6g.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 diff o5kgr7q/g-j cerence of 500 V. What is the velocity of t c7/5rgg j-koqhe 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 c e9jl5g 7sgwuy/wy/ +charge of 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is thegyj/9 5+g/wc lwe 7usy 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 th9tdu m2;w4nois mb (2fe electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric fs9 btmou4(n 2iw m2f;dield 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 12)8uo,fo 2vxbeyfr o directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, u r,vyo22)feo 1 fbox8what 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 7(2 (py+ hznqa+u*3i8ehihias hrbs . 50 N/C directed toward the east. If the voltage measured relative to ground at a given poinb* iiysh3+h.(q 2(narup i+e8zh7has t 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 4u 6fgrbx+d 9 4as2wl,fgx/f yalong the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of2gus46gfxd f /a4x r9y+ fbw,l 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-Vei ,c bqdmozzkii;mx,,.w 4/( 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, whqzb;,dxz, k(4iemm , i. w/oicat 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, separr 2z1y 6kjz:ihated 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 at a distance 0.050 m from the positive plate, how much kinetic energy does the e zk6 ijh21:yrzlectron 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 0m92r.l e8m3n xeqm3qds4ab6 xo)rj kby 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 0.050 m from the positive plate, what is the speed of the ebal0 2r oe.8rm qj9qxm mn3 dk)43se6xlectron?

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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 e7f:heycy / fci+occief7*idk ti 3, 9n*/gd u5ast. 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 direc cy io9 ky ec/fi5gnit*,7:e/ccdhdfuif* +73tly 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 eleccf5-te r-u +f:ukwy*ytric field of 50 N/C directed toward the east. If the voltage measured re-f fkt-5+ r: cuywyu*elative 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 differaj qjr-g (*it-; wd/kbence of 12 V, it will acquire a kinetic energy (in the absence of frictr-(jqjgdaiw - t/;* kbion) 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 distanch*/gx6z 3pgoo e 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 stick. Find pq m1 bv0/mioa4x50lh the electrical potential for the center ofola0 45vp0mh b1miqx/ 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 ( jt.m;whb*i6l 0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken t jbhw.*lt6im ;o 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 at (0, 0) and a -2.0-nC cd zpnij8-k09iharge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric 0zd8npki- j i9potential 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 -2uh /nqy rs x- v51yaxlz0u5nq0(j :/dv.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required ty1u:n-0sq5( r yvvh/lnx5 0jqzu d/a xo 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 qp) g6 gz+qqc*a rectangle of sides a and b. What is the potential at the center of *q6g+gpz) qcq 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 ho;nq;b,22q pu7 pvqgzpd a4- of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential in the squarh7qq;pdoba4v2p-n g;q2up, ze'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 (chargets 8egp4;spseq 8r8kkz4ao93 +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 plar-1yvkvgu akaab)9nt5:zj +5ce three charges, each of 2.0 mC, at the corners of an 5nkav9 j+:gbva-) yzu ta5k1requilateral 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 yv:) gs/0jeq 6 39fz qvqkfo4 azvr54pa 2.0-mF capacitor when it is charged to 100 k a59pzvs6f 0)qgzq/vq43 ejfo4:ry vV?

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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 hlrtou ew58 g/mnr(-bco.f* b. fk2z1m as 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 px8rna /*ol/17 ifoylk/zhv - zlates are separated by 0.05 /fr 7-/*lvkh1 zaoyo8lxi/zn0 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 capa5nfj+j u/9eui1dr7y esav3 6 ocitor has 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 has a pl e1fy3 blrrx*8ate separation 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 b*r8xlye3bfr 1etween 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 connected acrosp f) lbz06+6npqo ej8stsfv75 s 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 the proc8p76q 0ob f 6en tf)v+slpsj5zess?

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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 storemj, mcr2rbq5)axis:2 d in th a2r:cxq2 jm)irms,5 be 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 capacitor. What is the energy stoj.6esw ;v sy,cred in the capacits,v.jyew;s6 cor?

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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 mx v0c nhi;48e(y2g jconto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging t4 gcnve8;mij c2h0(yx his 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 charge*3q vskob4 6qhl fn7b2d 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 pla325, avowkdb ntes 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 capacitorvty/47d sfc xt;*k a (chjp:/c 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 capacit7w gx f92olxz3or 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 area of2-y(k y aqj smeugp09* $0.40 \; m^{2}$ 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 of 4pcnlub.g 6*ofe 0l2n:/et oz$0.40 \; m^{2}$ 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.vy wlrv5/fso-2l+z:n 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 tvyl:5 wzs +l/n f2-vrohe 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 b.i9sui ttdht j jt 885t kyy7r/h1r)i(attery 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 voltage across the capacitor's plates after the slab is insert5 t8(jdhkiti)hyurjs7 t t8i.9yr1/ted?

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