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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 aitt numpf / ibv;l(4:4 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 4j/ 2 f5evo+ooxrev:n hw*r.aa

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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 insula , 8uqm2ptjnfl81l,mj jt /x;nted from their surroundings. Object A has a ,jt8jpxjluqnm8 1t f,2 ;/lmnnet charge of excess electrons. Object B is grounded. Which object 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 fieldbbym1; pjeloy 7 e4;q0x js(d*

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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 directd)iqc1*4c3w t zn qgook/ 28r*acifz.ion 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 on a hollow conducting sphere. Theyp0k7h 8 mn1ulm

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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 ;(r ,.2fdqlzohb quk. accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000r q.,do ; 2qzf.lhk(bu 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 po048jb;4n sxkz kcg)t oints 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 dx,vu +0tu+8x1 6hl xofzio9palong an equipotential surfacvox610u8 zd hfx+lt upxo+9i,e.

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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 mc 9 bfgtig;*y09*p ll;ebf9wbe

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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 electr3s-svb8 d/ gaton as a result of moving through a potential bs-gs3adv/ 8tdifference 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 urzquxtgh oqxma 0 ;,7v70 y:p/nit 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/ln0 ( mnc3yjd1,u-fck 9 kfjmg6noa* 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 a positive p4)cx hu8qk 9kb.qugd5 7q g:e.feq gs(oint charge is 100 V. What is the absolut.c euqk(s7) qdgx85fqg.:eq g hu bk49e 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 chaf afisq3hbqm; )tph ga) 6x92ns1x;0p rge is -100 V. What is the absolute potential 4.0 m hsp9mnx)g6q3 2 pax 0fb ;ia)h1tsq;faway 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 oc6o u(v5se ) gjblc*g 7f:a1ja square 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 acv1 7*ejgs o(o:j6ul)5 gcb falso 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 3l 1xynvw94 p/0 pyivnV when a charge of +Q is located at one of the square's corners. What is the yn/w1linp 03 x vp9vy4absolute 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 that t1ms *wx aw *fh2,dqy(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 anuq, 4mgtb4 t2

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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 that one zb tp8ner hb/i 184 guri*ds;5has twice the plate area of the other. If the smaller capsr8bidb irtn4 1gz/ *hp58e; uacitor 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 capacitance of C. If the area of the plates x)m.tjrn:a*pg 6 lnx3d5 n* tjis doubled and the distance between the plate :gmp)nlrx53*n tx j.dt6a* jns 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 full6-dmwf - g (3pyx/eo 6k(buflp/cfi3wy 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 the platel3k-6(w/y( gpb fcd w fo3i/6epxf-u ms 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 sv-ny+mr:hsan7y : n(is weakened, the capacitance of thatrsv: -nnhsn+ym:y(7a 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 voltagzh+2hgczz) j s 9ge:) chton52e by t2)gszzhce5zo)j: 2h9gnc + ha battery as they are pulled 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-j s gbp:7, y1wk3pw*vhga(1jw plate capacitor are maintained with constant voltage byjpj1hwgsw kya ( p*w31b ,g:7v a battery as they are pulled apart. 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 for adding a dielectril +/3tcr2 wxtrc material between the plates of a capaci/xt3 lc2w+ trrtor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material x2y9cdi,t 8 fr6grf.w9v7vgx such as paper is placed between the plates of a capacitor. What happens to the capacitance? .9d rtcfv 872wv 9fgiy,xx6gr

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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 plates of a capav).:w3yznjxpv0 ; n ylcitor hoy0zny) x3 jlwnv p:;v.lding 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 capaci-k y.jofbv25 cliqh42tor is connected to a battery and becomes fully charged. The capacitor is then disconnected, afqy.l b-ivj52ko2 4c hnd the separation between the plates 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 cojqh92 0-gn1- zdlj )dujih 7zhqo2r 2znstant charge causes the energy stored in that capacito-0zlhgd) z7jn22h j9q2zi qodhrj1u- r 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 acros: ic 759nigmdls a given capacitor causes the energy stored in that capaiicg9m7 n5l:dcitor 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 po:63utddnza,x,xgf/ fzwxi w-) 7 66aaogldx)int A to point B. What is the potential difference between points A and B?gatwdax6fi6)zxz nw) g/xfa3, 6,7ud-:lxo d

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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 0 m32xsre6wjil 0f:ccelectron from point A, where the potential is -50 V, to point B, where the potential is +:i0f2 mwejc3c6rs0lx50 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 reshklom m8q7cs0 kymk 9q+,6j 5ht, is accelerated through an electric potential difference of 500 V. What is the kinetic ener , lkk8 mqkmyoch5sq 0hmj796+gy 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 esn t(* pwqu/*/hsrqj+ lectric potential differesqh( *s/ prnt*qw /j+unce of 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 throumw0v8zm * d3cwh rhsmb)0cq9: ow d+s-gh a potential difference of 1200 V. What )sh dq8zh obm: wvr0sw*w+c d90cmm-3 speed 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 kq+ p-wue5;dexg+x 4j x.)tvqmoving $8.5 \times 10^{18} \; electrons$?

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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 5o8 vzltjk47p 300 V. What is the velocity z8olvj3pkt7 4of 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 chargerh/ja6: sx.zx li 0-nd of 20 mC. The object is accelerated from rest through a xzxnr-h.l i0s:/j6 ad potential difference, and afterward the ball is moving 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 e40pdb:j3z 3o zpq q1gklectrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between thez ozq0pg1d4kp3 :jq3b 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 directed parpm9 .v5f*en4 p4dzglcallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.4c9p*ezgv4.pl 5mf dn 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 50pa 9idnn((sq - N/C directed toward the east. If the voltage measured relative to ground at a givd(ip -asq9( nnen 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 a3sad ;ik/:hwbal74 zk8h aim-n electric field of magnitude 3.0 Vdh kklb:a4wm /87iazih ;sa3-/m. What is the 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 12n hq-g2mej- 21 kcxa*w9p s6rd-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 pw6mh pq -a*s1 -rndxgc92e jk2late, 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 batterls a 07(-up5t a+jmv o0pl:ttey. An electron relea-jo a 5mtv0ptl 0upts+:a7l( esed 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 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, separak jxw4o)fe2xv yla5q1;1jr) mted 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 elec lvj)ry)21 5jomeqx1wxf;ka4 tron 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 electric field of 50 N/C directed towtt)tp/3 .*t uwup2ud jard the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the vt.tp p3uujw2 t t*ud)/oltage 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. .nywx z5)ux-p If the voltawnx 5up -)yz.xge 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 through a potential difference of 12 V, it wil1uif :i px2m/tl acquire a kinetic energy (in the absencep iuf1:/2xtm i 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 m1mbpn340,p6 nq vs doit7n.tk m7k /ka 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.(ql + uyn)hgz1c x9zo4 Find the electrical potential for the center ofqxl9 4yo)nu+h gzz( 1c 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 vhq,1ui ffe88nou::c charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4.hvn8ufuq f1ic,8::eo 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 s ,x:mfs3eimy, al-8s (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinsfx:e s38-ymsi,l m ,aity, 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). If the /z f 44ctsp1wjpotential is taken to be zero at infinity, what is the work required to bring a 1.0-n 4s cf4/ztjpw1C 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 rectan1k/yrw *x8)hb )pt.mzlbh m3(ri mr x*gle of sides a and b. What is the mr*1 ki8. ry)/pxh x*tm)l3rwh (bbzm 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 t. :ixxo uiigl:x,9j.ywo diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -g. ::ixloy 9xj,xiiu.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 (cndjpp / r;:lbr rqlikay- g8c55. o.fs8 pm:h1harge +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 coetjc /ce0c-ba5l yc: 0rners of an equilateral triangle of side 2be t/0 cc:ccayj- 0l5e.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 xcefn* l r7l gg4p(.y1we7iz3when it is charged to 100r*g7cn37plelexyf1 ( w4. igz 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 platesey. t)ib aw;;+bcwabv *0fxp0 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 f(p3;e nwl m*sgilled with air, and the plates are separated by 0.050 mm. If the capacitance iswsml*p3n (;ge 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 of +/-.ozp cul jlarea $0.20 \; m^{2}$ 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 6 qx8 tt/sa*emic8ty2 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is 8yts268 tct/eimxa*qthe 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 a 100-V uv d:qq2sm )fo q.x-n;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 ;m-xqv2doq fn: s.)uq 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 154c:p6mxa zix 1 mF capacitor. How much energy is stored in the capacitor?x6ci xz4 a1p:m

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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 enaesbxf /q3aj7-x;i* j7jie 4lergy stored in the capac/ -j;l*bjja ai7e i3 fqe7xs4xitor?

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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 ca-paeo5/iq fm +a .dyrw y(75pbpacitor when it is connected to a 12.0-V battery. How much work was done in charging this capaciq5yrd ea7fapm/i .5( -ob+pywtor?

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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 chargev1n/obvk1d 4w/ki; spt+pk ;e9*l n wnd 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 capa*qgu x y1pc0s4citor 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 capacitoraf.afehb;(nx nau7g,:a-ka g6b *u * n 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 capacitor consists of plates of ar651.ig dy d1bbpl5xsfea $1.5 \times 10^{-4} \; m^{2}$ 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 ofszjo 0ir(7q3y $0.40 \; m^{2}$ 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 construb(8r, x wsvzrh,p6gs; e*ha8dcted 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 fully chargfs*0ri ,oo /5u5yjz1gyz9cjmed. The battery is removed and a slab of dielectric that completely fills the space j1,yusioy /59oz*5zfr 0gjmc 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 bagp8 nr2k+wgz iht, (eu i5;cd5ttery and becomes fully charged. The battery is removed and a slab of dielectric that completely f nk wr+ie,2;(58 dthpiug z5cgills 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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