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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 r xwflp c *o2 jjq2(9cvx9b1g7is 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 is2xtoc2x0bza y. a +x-z 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 fro4)s2y af*;ny 4hq ca7kt9ow v pkueo(*m their surroundings. Object A has a net charge of excess (an pou*wf;yo4*k 47ytcs)e ka 2vq9helectrons. 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 dirk*n30ub7 ui biection 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 directi (e//k weadd9ug qm,9don 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 ayocynq63 ;*n2b. h:*i tjoxuhollow 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 spwig+9eizyfqx3d quy +cod4h d:oj. -3pk44*jeed v by a 500 V potential difference. If the potenti3e*pq.kozhdg dq diy-+ f+ijywcjx4u: 43 4o 9al 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 potential is ak .b*: e7:8mffd8irub gsuo/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 7nti3;h q 1hubd.duh:an equipotential surfaci.u 7hn1db:3 h;t dqhue.

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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 h98 p)h/:crt atw 53as5/zic6 ucbmzibe

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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 5(nd cpxg p jaq9+1k7i uq:/lwon the electron as a result o/x(k q1lp5cuq :igd pj 9anw7+f 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 a unit* q f )czn):((9fusgnkc 1wfbm 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 correspon p-ue ;or t.;dk;ofo7bds to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potentiah9a:*q6yt5p9xstzi c l at a distance of 2.0 m from a positive point charge is 100 V. What tsi59ac q6h9pxyz: *tis 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 dih.d l,-lzvc ,w3ife5vb c,jw; stance of 2.0 m from a negative point charge is -1z-j wle,v;h3cil ,dwcbv.f,500 V. What is the absolute 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 l jl;k.vq8q(a 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's8 lka;l.q vj(q 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 potentip9l ot, *p,rxo5tmbf7al at the center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What *fxp7 r,t5p9btl,oo m 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 that arru ,bx. /yrm2ne

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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 isu rzqdb2 x8 zk8 xg:2( uts5:/nkxv3y;8 uplcz 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 in every respect except thatf d4ej):2j- ygd k+lde one has twice the plate area of the other. If tyd-le4j dg2 +kdf :je)he 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 capacitance oj1 nb c ws)f.,hht3h3)cbg:g)uig1bs f C. If the area of the plates is doubled and the distance between the plates is halved, what is uhb3j f 3gs1 cg) :,sb)whhtgi)1nbc.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 plac8d(q*-2 o*gtim . niu2v5*wzz nuyhstes are immediately pulled apart. (With the battery disconnectmyc *u*i u(vhi w2ns2gqot zd.-*z n58ed, 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 p7t mh2v.9 t(tzvo i79yhtjn6 4,t5cw2 fzend flates of a given capacitor is weakened, the capacitance of(omt5t.t299f6 7 fve hhzv n t42znjwd7c, iyt 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 mag58w n7ybco1rv 5doy +intained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on th +5rogco dn ywy817bv5e 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 constant vku0 h(y 9-rrmvoltage by a battery as they are pulled apart. What happens to the strength of the electric field dur9y(0vk rm-huring 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 addi(k*o( e5sfcj yng a dielectric material between the plates of a capacitor.kfj*es(y(c5 o
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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 pas w*d l; 2i/ac:pav6du* kl)rn8 xiw2zper is placed between the plates of a capacitor. What8vu)wa/ni*iz22:l 6 kw lra ;*scxpdd 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 p ;atkaid,,,d:3 ftgfbetween the plates of a capacitor holding a fixed charge. Wha, ,a ;dtdkf:,tpa3igf t 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 connected to a battery and becomes sl59foi 4r*kgfully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stol i95sof4r*kgred 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(::wsvgrku)jokm/ (. g*klme the energy svmkmgs:(lu. * ) je k/gwr:ok(tored in that 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 stored in bf e c6l v;bys-egpk8x7wh ;+:that capacit xgpb h+ c:fy;vl-6;8ewsk7beor 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 point B xjfxv2s w2.f*q(+clz. What is th c2z+xxf.jv(lsf2 w* qe 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 movin stl.rjg2yf2kg0( 0tcg an electron from point A, where the potential is -50 V, to point B, where gsc220.gk0(fttrljy the 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 rest, is accelerated through anbrifoz6 7(bz.:cwriz:e3g- 4 t m a(kk electric potential difference of 500 V. What is the k 6rbko:.:e -az(f (iirzc t3bmg7wz k4inetic 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, kd owzj *ozx: +. yo*xtfx*/l.is accelerated through an electric potential difference of .x/xzkojo oyx. **wldt+z:f *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 througbemofg i;-r00wcnr i(-x .j7a h a potential difference of 1200 V. What speed does it acquirem rig(rfx-.- aw0;cjnoieb70 ?

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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 9z0 bcy,(nxi6 c.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 difference of 500 V. Wt4 d67xevbu:+41+kd at9o iw7 bink dchat is the velocity of the electbd 177b6tx9iiodk4a4 nevudct +:k+ wron 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.5ku kmi yr8 j:*gi);fgp:9ohe The object is accelerated from rest through a potential difference, and:kyu8i jg pe)hf*9 kor;mgi 5: 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 electrical pote;.i v2cpu8yyrs:rd4 j ntial difference between two parallel metal plates separated by 1.0 mm. What is the elec2jd vpcs;y :4i8r ryu.tric 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, ky3x il(9l(m)j,hvqb with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potent ,yil(k lj39 q)h(xvbmial 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 elect zs5zql7kmqjx r5-*yf 0lu67dric field of 50 N/C directed toward the east. If the voltage measured relative tyr0l6k jz 5zxd57lusq*q - fm7o ground at a given 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 dz eaf/dx5 ei:iwti/.sg tw9/4irection of an electric field of magnitude 3.0 V/m. What is the cha:/xe 5ie dwawf9/itz tg/s4. inge 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, jyy6 fsd.3o.b4hz,39tx cfgo separated 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 ele4j 3g oby,x o9 fsdht.6zc3fy.ctron 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 0.20 m, tz 8a*hi1jx ; r1gpmzw/fqk; a(,a1zcv 4yr5sare 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 doesgvs4a/8 zk 1jh1;wa5a*mtpqx zri z( yfr, ;c1 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 to a 12-V battzau;w33 m7 palc s*/nwfou.s;ery. 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 iswocw /ua7 upm s.laz3f;sn;3* 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 electri/ mvs1zjvy11 eh f9qp-c 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 voltage at y9fves/ph1 1q1z-jv ma 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 xi.z1l 2az hm0field 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 voltage at a point 1.0 m directlz.1lixzam2 h0 y 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 diffe8+kps1r38zlue qs-f d3hn(u qrence of 12 V, it will acquire a kinetic energy (in 1kd8npu (3hluqsz ref38+ - sqthe 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 di)jdoi)pkmf7185* xjz:ci yiu stance 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 the electrical poten,c0 q o43vo7fdt8lpfltial fo dcp7 8to3q0f, lvl4for 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) a + b6fsdi7xpe s;8f;twjd; 9lkev.kl- nd a -2.0-nC charge is at (3.0 m, 0). If the potential ie8;d7 ilp;bk-fkxt9; jw +6e fldsvs.s 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 at (0, 0) and a -2.0-nC zqsv 2dkd,u;k7 36ylt charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.u d3s7kl6,2 tkdyvzq ;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 (yfw 1no1glot).yid oo*2 v*rzo/k 97u3.0 m, 0). If the potential is taken to beu. /n*ovkowt1 y1ri)ooyg9 *7ofl 2zd 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 ch:g.l6c96qpn :i/csuv.ac y v rarge +q are placed at the corners of a rectangle of sides a and b. What is the potentialp vcc/c nsq.i::96vr6 . yuagl 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 two , w,y/o*kha ymdiagonally 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 square's centerowyhk *y ,a/,m?

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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,af/ /s./v3w :k(koeiv qqn dt0 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, atz4)l-m+ e5gid yp p(ik the corners of an equilateral triangle of side 2.0 cm+4ey-l5igk m ip )(zdp?

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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-mF6cv6t9te-bmng a0 el va:i0ajc387h k capacitor when it is charged to 10cvl8tk6 :j7ane- m iv6ataegbc93h 000 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 platjo:36vm 3rlnb es 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 platbq 27x7u*r 5isxd iyl+7g eav+es are separated by 0.050 mm. If the ygla ue x75 *v7id7s+i+bq2x rcapacitance 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 capacitor has plates ofv4-q)o lsfb1o 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.isy;b-ldx8 p ,5vu4l4keo3 t j0 cm. If the potential difference between the plates is 2000 V,y5-lv8pe;lx 4u b3 oj,4sitkd with the 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 battery. After the v8 v/cu nwhrv:+6)wua.8okk ebattery fully charges the capacitor, the capacitor is immersed in transformer oil (dkvr:.8ku)+ v6now/aev h 8wucielectric 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 ly+t:mq h);gac,ivtg3vt( l : capacitor. How much energy is stored in ta:ih:,q gc+( t )tmtyl;g v3lvhe 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. Wha-jprm5(u q/*/mvy;- q jqgd 5jp - l8ju7zkjmyt is the energy stored in the capacitor- /kmm jlj;dgu-(5/m7j-5rqp zv 8qqjjyuy* p ?

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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 capacitor when it is conner6. t 3ncjb*yc;c+ntocr0em 3cted to a 12.0-V battery. How much work was domc ;cro6 .eybnc+n*cjt3t0r 3ne 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 isl. 9;6em8n n,ium gcen charged 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 plate7) yg+jxs( epgs 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 consix14vrc+ws a eg)-m:a vsts 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 capacr( rpyan6fl88 itor 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 withx)y1 ,swy; m jaucby;2 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 construct o:jnh/i1p5jped 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 cedl j 8rjzegbus2ve5 +7in.e+n6 ),uvonnected to a 50-V battery 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 capacitance of the capacitor after the slab uerjs 8vln,5eu+v z e 6gnied+2b.)j7 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.cm9qg meff :f2+9i t3azdwl5*i s;i ,g The batt:f td+w9fgel2micm*i iq f5a93,;s gzery 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 inserted?

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