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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 7fkgcx02)ows 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 sr / cct5xex(+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 ar+b)rkhbsf2 xfclir o/96 q+ryz46i7o e insulated from their surroundings. Object A has a net charge of excess electrf io/9 qy)l+4ikfsrr+hro76 c6bxb 2zons. 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 fik503zggm5 nu9 v;xa fseld

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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 buu ava).1e:ci8 it (*tqo4z zin a 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 on a hollow conducting sphere r6e kzw /5pdjkp+:j5u. 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 podemn9no 37; skm(bz(ttential difference. If the potential difference is changed to 20;btsk mzn( 73(dn9emo 00 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 athmplm -(*x maq:2 h-pq 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 sungy :2wbzfi e e 2/gdw-8tl0n6rface.2/w:ngtdez86ibl ye-gn w20f

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface m6z q+um mv:zjk3:l+me puoy 3)hwf2w6ust 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 carryi/m :v nxogl.8nng a charge equal to that on the electron asn:xgn 8o.l/vm a result 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 ;mjg8naid k71 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 correspond gfpu)eqa tq86t, k+a-s 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+bi m0rh+pk3n 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away f rhmbin k+0+p3rom 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 rj5))wmq cno/6r9h qda distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 5o/qj )wnq6hdmc 9)rr4.0 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 anhnr+0hgcisrf0/ 3j (51paxbeh /z4 r charge of +Q is located at onein0zcgxrh(3 4h e+ fbj10nr5as/hp r/ 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 4. r abrm8vsh9t+4reaw(h fa (charge of +Q is located at one of the square's corners. What is the absolute potential at the square's cs4t fea4m rr+r8 w habv.a((9henter 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 ;axnj dr k6jo4l,dc-iw +a)a5 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 isq6ozx pb./*elt (*9 /6iiyrt ph,cs mx 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 aj r 5,i,omnyb(fn53d uz9mp; kre identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one9 im ,un;5zf3(ydj m5rn,kbop 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 pln3p e3oj xv7t;r sa6v:ates is doubled and the distance between the plates is halved, whatan :7t6xop;vrjv 3e3s 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 capacito w)l5yd oitd7bhm (0;ur 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 diffeb tddh o)57imul;w0(yrence 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 weakened, thjr: ,i;g yw n2qh5a)yhe capac) jahnyih,:5w ; g2qyritance 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 constas.4db/lfm mrrn9s 4i, t(n y2ant voltage by a battery as they are pulled apart. 2r4nsdr/mta( m94. b fsn,iylDuring 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 , o tx8h68ihltconstant voltage by a battery as they are pul ,tt i8o6x8lhhled 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 dielectrg ;pkypr vfq x74muup1,mk677l. s .uric material between the plates of a capacitor.u, 7g;fs mpvr.kmkpq7 1x.7 y64lrpuu
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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 pa:nl (sp; 8wuh8qu(f8nza rcg+per is placed between the plates of a capacitor. What happens to the capacita(shaznrluc8 u p8(;+:qf n w8gnce?

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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 betwefnh, .)6km,mv0cs yog en the plates of a capacitor holding a fixed charge. Whmk.,ghso vf)mcn 0, 6yat 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 ck zzkvfkqd1. ,+p0 c4mq+y 0oponnected to a battery and becomes fully charged. The capacitor is thc10 q+.kp kk+pfz0d4mq,yvo zen disconnected, and 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 capacitan gc(fb(x;3i rece of a capacitor holding a constant charge causes the energy stored in that capacitor 3(; bfc(eir gxto

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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 thep 9t7ucd-hma s 4un-04ctq b1k energy stored in that capa-u ndc4bs4t huqpk m97a0-t1 ccitor 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 move9 .st)h,hqdw4ctk iie45vmi mh00 a/m 10 C of charge from point A to point B. What is the potential difference between points A an)w h5i4amc ieqm4 .s,0d0/t mitvkh9hd 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, where the potn)vnk.l(pb1 qr: hi*l ential is -50 V, to point B, where the potential is +50 V, isn1l)pv*kqh.nl: rib(

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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 through ae0 g *uw(q1grxn electric potential difference of 500 V. What is the ke1 0(uwqrg*x ginetic 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 act zm d;r.( ::o0c,rt3 x, 9 jznd(athy,ptkbozcelerated through an electric potential difference of 500 V. What iso t :hj0p ,:z3o,bxzn(td( ;m k.,yct9trradz 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 potenti3t/yu:ivw hl 5al difference of 1200 V. Whaty/:i 3tu5 hwvl 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 i5 pbm ztuw7t0 8y01ei1fvdcy 8n 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 thro;9z uyuhi 3eb)ugh a potential difference of 500 V. What is the velocity of theu zi)u9yh 3eb; 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 accelerated froczzccz*,8 l 2y lq;e0hm rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the 2z qzl,*8 cc; c0yezhlpotential 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 main: 4qysny7tpgkjb.,u3tains the electrical potential difference between two parallel metal plates separated by 1.0 mm. jb.t3, 4sgn yyqk:7up 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, is dric. h(cay 4lmoannr,z-3 )fxz uh 55*i*1qjdirected parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at xr.5qidyz*fnz( 4om3h r1c,alu-h5nj ca*i)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 toward the east. If the vol n1z-p51,8xd az/alocygi:il:evay-on5p + ptage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directcx+i :-a15/z,-aly 5lnop1ypeazdg 8op :i vnly 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 magnitudqi l2 ,(rtxe6de 3.0 V/m. What is the changq x6tle (ri,2de 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, separa;7f f0hdbe (ijb -erg0ted by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m f0f f- eeb(gb7hr;jdi0rom 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 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 6 dnlj5txy vw;mc1n,70.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10xjcyv7wn lm,6t5; 1nd 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, separatep.(ngf hgye 27d by 0.20 m, are connected to a 12-V battery. An elec(f7eg2 h pn.ygtron 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 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 electriclqacfy5 *s ,0m 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 thy*sl 5mf ,qca0e voltage 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 toward8 cy1b mf )a:hewh.f8 9et8xlb the east. If the voltage measured rel8xcm1h8f :9t ybea we)b8f.lhative 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 g8c 4iffs3wp8 u i+e8solvy0; through a potential difference of 12 V, it will acquire a kiols 3iff4s;ew8v c+p gy i0u88netic energy (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 dista h0t5btjc(o.zf j5x/ c3,ug,jf *iutince 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 uu9)o4 ge kf wl7.a- omdo a81,)fzrsfstick. Find the electrical potential1-s4,umfauz) 7.dgfre o ko9faw 8lo) for the center 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 uej2 cq.+zts)z, ck 4sis at (3.0 m, 0). If the potential is taken to be zero as4z 2.squkect c,j)z +t 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 charge is at (3.0 m,ojl07// k p: wqoq4jflnaj )7s 0). If the potential is taken to be zero at o)w sqjl//pl a7 qfn74:0okjj 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 xkrsz5hjgj882w s010qoyxl / (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potentials0 s y2rxw/g88kqxjo l0z5j1h is taken to be zero at infinity, what 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 rece4xuly yv, znr+35i z6tangle of sides a and b. What is the potenzyez4, x vl 5yiu3r6+ntial 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 aw;20jvamy li 73 o/zn : j;bi7zgmqzi5 side. Charges of +4.0 mC are placed in two diagonally opposite ilywm3/m 2 ijn7a5 bqijg; z;z:0 v7zocorners. 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 +2ey, 4xhoi5- 0gpxys lw(, 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, tkn qy.8z6 (x/x g:ofkat the corners of an equilateral triangle of side g6x qnofy/:kz tk .(x82.0 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 9i(6ccff9 dbga 2.0-mF capacitor when it is charged to 100 Vff6g9dc c 9b(i?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capa6,aekk /2tmk tya/n 6dcitor 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 akoq1rra qa f4s/4 ak50ir, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate 4s/0q1 ao raf aq45rkkarea?

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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 44b)yl8((tt tnt7crpae sbx/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 separatioj *,gyxna +p(pn of 5.0 cm. If the potential difference between the plates is 2000 V, with (+nyxj* ppg,athe top plate at the higher potential, what is 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 a 100-V batter4 g2/ q,ac,pirfec0wqqp1 l4zy. 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 prq /q i,qf4c 10pw, pa4zcrg2elocess?

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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 stor*6jlgjhy fr*.fc1 mq4ed in the fmqc 4* jhgr61*lj. fycapacitor?

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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 i72/p/ a aryfsw5 /suly23pogbs the energy stored in the capacitor?b ssywp/lg a2 /5o7 /y2rap3uf

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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 00f5j.n 0uhf fr ;h*3hptzv rsthe plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in c.rh*utnff05 p0fvr ;j hzs30hharging 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 ch89ii*ikp, ul)* pigcdarged 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 aren;j bukcw-0 :xa $1.5 \times 10^{-4} \; m^{2}$ 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 61mqveoc l:l2)m; 9 mcz,jwqes 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 consi p9pucvdb7:6 qsts 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 wj kk o-pl5+uq,ith 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 constructed withlcd8z,wq b-o1 w3ji8hg:+avq 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 charged. T2u;b m12lynrshe battery is removed and a slab rn2yus lb2;m 1of 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 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. n(i(nci ftk1-09eru).peq xm 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 acroc0x 1p.fu ekr9 nim) qi-t(n(ess the capacitor's plates after the slab is inserted?

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