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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 vectd09c c laxg,r yu*)9qhor?

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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 ;cn8 ,uwro 0wxl s3g3iis 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. Obj*6 5aorteu7 c)w:zlnkect A has a net charge of excess electrons. Object B is grounded. Which objelut5: )e6w7r *kazocnct 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 fi a5(j8rw;niiqeld

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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 oppo omq:-nmx; lbese ,* f(2whaj7site 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 cqpwui7.oz8au q6 a)j)onducting 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 fro4( clerx4adr (m rest to a speed v by a 500 V potential di (rr4lcax4e( dfference. If 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 alrub/mi*ou99 1 e qq,cql points are 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 point A to point B along an equipotential w 2f(i.t y3piisurfaceit(pifi 2y. w3.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfacei6j 2 y7-iv yhhutl/ilaq ;1uqp; u8:u0tue3a 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 thexw6m hza51c5e electron as a result of moving through a potential di weax5c1 m5hz6fference 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 ml5hf) ot mjp5w1s:h0unit 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 t.ww .5g-ocjzu 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 a distance of 2.0 m from a positive point charge is i.)s u.-ca t 4oaw8ju8+knp rq100 V. What is the absolute potentiat8w +-.askqin 4j. uor8up )cal 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.-1hairbn285 a8 cu fp;eu,d km0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same pointuc2f1uid;8rp- b8e hkan5,ma 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+ d :yig:p.cj-e uxq)basd 7y3-egal/ 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 is also filled with a charge oacbgdely . -ua:-jsg :i3 pqyd)/+7exf +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 squg,3e ndee lbrx -q qa/7.()gftare is 3.0 V when a charge of +Q is located at one of the square's corners. g ,b-.na3 q/)fq eel7tdx(ge rWhat 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 two charges th 9d/r bpg/d5-jwc+dav at 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 2c h,ft81cu5 pai9olhgm*y d5 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 imkcf z)b,c /7wn every respect except that one has twice the plate area of the otherzf7kmcbwc/ ),. If the smaller capacitor has 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 capacn9x9*koonyz28- s( ho puxs :ditance of C. If the area of the plates is doubled and the distance between the p8 9zx2dhpyo(n9u* soxs:-kno lates 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 then is removed. The pl(q r5 5ryspc1l mfh62lates are immedi51lrlp2y h f5(qcm s6rately pulled apart. (With 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 givd6schcn+ me,lv 1tc7 9en capacitor is weakened, the capacitance of tv +s1m t9cd6hlc7nc,e hat 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 constan)1 oswaw:o(- oqq8bhd t :8kbkt voltage by a battery as they are pulled apart. During this ) ow1qt (oo-k:abhd:b8 k8qswprocess, 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 para(*)nl5jhqqe uwxdd z.g91 7fzllel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field du9g 7*(j5z1. h f qnexqzdul)wdring 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 fosphhwtd+jhi :1;v 8:tobi *h2r adding a dielectric material between the plates of a capac+;tb dshvh iwj2ohti: 1: p8h*itor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material suceb4m*k :mi4tqeaabg 91) ne+bh as paper is placed between the plates of a capacitor. Whmane m4:1gba)* itqbk 4e+ e9bat happens 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 between the pt2)7jmhwm yil+m(t9 g qc,jf6lates of a capacitor holding a fixed charge. What happens to the electric field between the pyjmgmtj l (qc6 9)th+wf7i 2m,lates?

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capaci 1t 0t)u)duy -orniim9tor 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 that no charge leaksi)nu1)0 u9i-m yto dtr 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 en/886ivr hfj82dz gyd tb82w+oziki h*ergy stored in that capack +6di2 2 h jt888iywz8h*i fdvzr/bogitor 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 op): ak /( :.lg 1lbrumvrgi11vkww 0gthe energy stored in that capackp.r1: (lw /1: am0gkivu l1rvbgw )ogitor 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 mo+e k,o ;zrx7w8krg3ap ve 10 C of charge from point A to point B. What is rr7ow,akz38x+ ep; kgthe 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, wh-9 ua lxl6li :kuj2.rpere the potential is -50 V, to point B, where the potential is +52u.jkll -i9par 6 xlu:0 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 accelerated hqfm*s8 / hv6ythrough an electric potential difference of 500 y/m*q vh 68hsfV. 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 electrm mlgc6un,md8/e7. nnic potential difference of 6g. n e mnmdlcnm,7u8/500 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 :n7u*k ne0 dg ;5cg7l8e xkqycthrough a potential difference of 1200 V. What en* q:0 xkn757d;e lykuccg 8gspeed does it acquire?

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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 mozt dv7 cb9x bh-se9(*nving $8.5 \times 10^{18} \; electrons$?

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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 a u1 j-al:v6/jh xd4rtf-x9 ztsccelerated through a potential difference of 500 V. What is the velocity of the electf 1h-9s -j/zuv xxttrlj6 4:daron 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 5 zkju*e:c;iyzp6, vf mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the mag *ye ,v:j6c iu;pfkzz5nitude 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 electrical potential difference between two paralorj(p+d+ x3fylel metal plates separated by 1.0 mm. What is the electri 3rdyp+o+ (fxjc 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 m5r3ecwcoow(cc aj; 2ztt-rb v41m +2kagnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = omt214wzcjw cb r(+5 ;2 eovkatc3cr-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 to,i4tadb yr3 d1ward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly westtdi,r3 by4 da1 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 dim mk 0+5lp fjp(tqj(-frection of an electric field of magnitude 3.0 V/m. What is the changeqp f5ktfm(+jm0 (p-lj 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. An f gtvho25a/5 1zhs;oeelectron 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/hfae 1stgz52;o ov h5 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 conne)*q+zwgl41gi s7sygfcted 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 electron gw +gsf *)4yqzgg7 1sliain?

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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. An e*wcbp7 90cze:p 1 5 2rpuzopnelectron released from rest e9o* czp25c1p0up enb7w pr z: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 electrq* av/r ldik/v5t; c3fic 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 vol//q td;5* ac lv3rfkvitage 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 directed toward the east.aix);2 * smgqy If the voltage measg a)qsxi2m;y *ured 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, it will acquirnt; nzct1 6 jpofj 93,/gimv/r2v1m)w xo+ dwte a kinetic energy (in the ar /1tpc)gf2iwod 3nn9/; vm ,xtjv1z6 j+otw mbsence 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 k9:vy ab vd.4ka 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 meter stick. Find gf.x gqc/.:qw -6ucap the electrical potential for the center oxw.:q-6 ug p cqc/g.aff 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 or*3jx+yh: /m:yadn,t iq *wpm))ipo) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at intrqnwo:)midy )/* ayjhixm p*3 +,: pofinity, 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 ch;i.w qw0loaum xq .*;rarge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is thewa ;mq..lu0i qo;x*rw 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 -po9 9e0 x/z p;j7tb7 stnmr /hdv;m/ex2.0-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 a0mznphx / bxtsm9do/e7e7rtp9;v ;/ j 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/zv ftg5i)bj0 of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and bi)0/zfjv 5bt g = 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 +4.0zz.7 k;qmwjeq* +cu *ks bm))g mC are placed in two diagonally opposite corners. In the other two corners are plam z bk+kqcq.7ju;esm*) g)*zw ced 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 (c hatjg*n t,z;i*oy10b harge +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 chargergy :gbh 9+ow r44nnm,z3wovm 3+ gyq)s, each of 2.0 mC, at the corners of an equilateral triangle 9 ozgwmm+r h 3 )+rnwb4ny3y:vgq4og,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 pla;7utcm(t9ke9 pl 6qfi tes of a 2.0-mF capacitor when it is charged to 100 V(97ttf6uqk 9e;pcli m?

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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 plate(gejm 4sswto dnvk6:6 wu9x(-s 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 fv s,l 7:p:05moxwizu filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate arex,zu:wipslv:7o 5f 0ma?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacimnndd xja 7r / -xsie.9vzz1p/l* /y2ator 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 plate separation of 5.0 cm. If the potentia z,m rm,oyj6c/l difference between the plates is 2000 V, with the top plate at the higher potential, what ir6 mzcjm, y/o,s 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 connected across ae2f adt k6t;55)dkrq bfe6b/m 100-V battery. After the battery fully charges the capacitor, the ca/)akr f dkbdb65q ttm65;2eef pacitor 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 capacitoah.hc4s66isp3v c 0o gr. How much energy is stored in the ca g64scpa0.c6o3hhs vi pacitor?

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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 inl+mraz w)pcl+jd;7m * the capacit;)pm +d7larzj*wcm +lor?

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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 hq(/ik tm01iv dvhmd-/,yj5h a capacitor when it is connected to a 12.0-V battery. How muc 1/iq- 5md ki/djhv,yhmhv0(th work 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 so that mvw1vp:qb7o9e)o8 cz 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 cap6 0 vaagmu13nw5n,k: aatrg/mxcp+z2acitor 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 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 ce09x wo3l9tsa $1.5 \times 10^{-4} \; m^{2}$ 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 o5v-il4 ag(zy zf 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 wit hu 3gf8nf2x1,3upf8i39 hz4auxfk t vh 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 c0f )h y ,bousiafq2o9z x(ju)(onstructed 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 and becomes fulle fn*ppt,w 9/wy 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 sla*/pw9 nepf,wt b 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 fp,e212 t7u +zxk vyvylully 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 dielectrilk +z y127v2yexvt,up c constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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