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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 vew;7c39rq:b w qunyn8vctor?

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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 ismq.4cetulu ev +v h)(, 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. Objee9mfp; ,n.vs g2asz-dg gfcf (z4 ki+*uux6l5ct A has a net charg ggm f2;np .g* (dzsc6suz4 f-5,lvk+eu axi9fe 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 to;zg+ ve5 qh2uhe direction 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 direction opposite toe7fibi6xwjh m 4+/d,z 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 hollos jwf.j*co e(+w 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 50 9jc8o urk0 g98+fsgsr0 V potential difference. If the potential difference is changed to 2000 V, what will the new speed 9 ofg+r0jgs8ucr8 sk9of 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 iw1e 9fk9t*je/ i g/iby)h7hqls 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 ;wjfxpr axip)ubg ka0kr(xv( 3,r9cw,1 0ui :point B along an equipotential surfac93 pg,00rjxxrapa(w:v 1bxc i i frk()uk;,u we.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface o.x/i4,d yfbh. spol4 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 thec;:l(q0ikctlfd g/m ho: nw 03 electron as a result of moving tf qo : cn(lmg0w:lk3dc;0it/hhrough 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 au4-9a2ulykmw md(6lz.o+cr g 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 corresponds tom+-4io8-ajfy zkrf c-

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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 dist gp .),vdxn;ft enu*k6ance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m a,n f.d6g ptkux*; e)nvway 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 s6bb6uty j:g,i2 .xmo 5vie +wpoint charge is -100 Vtvmx:i u j6si5w6eo 2+ yb,.gb. 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 exnl t)1tq.,s a+fns gq1act center of 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's center when each of the other corners is alq1fngtnlst.aqs ), 1+so 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 ce7 iimnmx6 u).ty9,gpfnter of a square is 3.0 V when a charge of +Q is located at one of the square's coy76fp u ,m.nitm9i)gx rners. 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 alwo ,9ddngidw9 2/ fzvz+ays consist of two 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 volt is 68c-d1 *d 4qbbxar )a2d pvky0eggs.da

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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 /tf 0z +tc6fyk jxril.8k18rlrespect except that one has twice the plate area of the other. If the smaller capacifrtxyc8zf 8rl1 j lik./t60k +tor 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 m+gt0bsy - dv3area of the plates is doubled and the distancb0m-gy 3+ sdtve 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 capacitor wiegsyx onl k4..s77) 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 hlow.xy4)s ksn ige.77appens 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 betwee9,q m cot1uis+n the plates of a given capacitor is weakened, the capacitance of that capacit1m + ,iqcou9stor

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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 ar6zaj zk, k,uli++sn(v e maintained with constant voltage by a battery as they are pulled apart. During this process, as+ z +6uz,kvijknl(, 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-pla vok*::0i1qspppk4t rxp: y o3te capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field duripst1 ko: rpp4x3:i opvk:*qy 0ng 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 dielect /w6el*ng6l cd, ;pp car,teh2ric material between the plates of a capacitor./n;*tp, cpehew6dl l26crag,
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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 papikar1 lz2,; ybongeo + ;.,,asc4 jaeeer is placed between the plates of a capacitor. What hapk sbe;,24ylaaa jncg + ,1oi;o ,rez.epens 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 paperke. t 2fkr8-e chpia+7 is placed between the plates of a capacitor holding a fixed charge. What happens to the electrk-c.hp 7ka8t+eeri 2fic 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 connecte(w rx.i3ihmgrl55*wy16jm ktd to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between txlm j 5w35im.iwg1h k*ryt(r6 he 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 lnxk(qz1 g 2+xholding a constant charge causes the energy stored in that capacz xxk+g(qnl21 itor 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 store xxs)ww8b w-ijt+ ndw-. 9y5fxd in that capacitor t 5)f8j-+.ww-9dbix nswyt xxwo

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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 1:w(j,jbz1 xxby7 oaa /0 C of charge from point A to point B. What is the potential difference between bz 7 j,(abxy /a:1ojwxpoints 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, where the potential is -50wfqzbjy 7hmf1f :44f , V, to point B, where the potential is +50 ,f mbhqy7f 4wz:f1 4fjV, 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 an electric 6ae1ln.m9 kvxy ad qt ,i9(gk/potential difference of 500 V. What is the kinet69nmekixy9 a1 t kld/. (q,avgic 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 ely (trpb cnln+:v3 ;,drectric potential difference of 500 V. What idn+l3:yb nrp;rt v,c (s 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 potenzj1(6;-lcwax- vg8:jw e ikow tial difference of 1200 V. What si-j1c-we8z(wl :jwo g6;v x kapeed 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 movrmax;g5wqpf( o0.: uv)spd+w ing $8.5 \times 10^{18} \; electrons$?

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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 sbjgh3 76/ bux;h+tvu of 500 V. What is the velocitybt+;sv jxbu ug h7/63h of 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 charge of 20 mC. bos ,6zty+( /0c.zuy r scz*chThe object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What i*bz oczy ,6ht./s+ c(zucrys0s 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 maintainlh,:nj j j w9p8mos*6ss the electrical potential difference between two parallel metal plates separated by 1.0 mm. Wh6ojw9pjsjhn*m:l8 s, at 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 directed parallela*of/ r 9k/,ly8b2d3wc c-yi0 pdagrv to the +x axi3g wy-/ 8,9k rac2y*dpfdr0vi /bl coas. If the potential 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 electric field of 50 :-b l*/ oiq1(l ayqo74uavy3;rjfjzo N/C directed toward the east. If the voltage measured relative to grouna:ova r lujq4zq o/(ifob7;ly3 yj1*-d 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 alonghn:;i ve xd0vm++.8+apstxaz the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the protonit08 :x+; + ev.dvmxp+aznash?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates,;fj 8: w8jo-bxdc;y0iv z bm6r 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 electron arrives at a distance 1.50 m from the positive plate, what is the potentia-6dv8;fcoxj b:;j0yw8m rzibl 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 toaw ,p(qr 6d.in(i8ehj a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arridp(h.6jwinie (,qa 8r ves 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, separated by 0.20 m, are connected to a 12-V battery. ;a q /jakt:blg1 j5me4/ .bsge An electron released from rest at a location 0.10 m from the negatkjgtg/bla5 jse/.4; eqa1b :m ive 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 electric field of 50 N1c /cuenv x:mn3b et;7zd1g1 ccvy+ 2n/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 directly east of th 1c:xee1+vvnmz n2;bdn31/tccg y cu7e 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 elb 8b6wz z)x*xvknl:,q tmy6 5iectric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in t66tbwzim kn): x*zby,l8qxv5 he 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 1 ph. d 2lz70qqu8oygt,2 V, it will acquire a kinetic energy (in the absence of friction) ofg. 2yl0dt qhu,o8qzp7

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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 b o,v.lpi(j+jw(2 g hsdistance 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. Fin6.+nkpmz 0chpd the electrical potential for the center of the meter hzc6m.k +n pp0stick.

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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 (y0ek*6n 9 yrz*cye:xp0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is yey0 9zy r6cexn*p*:ktaken 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)qe* 1n7yu,kg b p3(5jwa-2xlm d -xekg and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energ 2m1y dxe5nkul e -kp-,b3(jawx q*gg7y 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 ;*4r7.iwsn1qu a cla zis at (3.0 m, 0). If the potential is sanl.1cru*q ;zw7i4 ataken 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 pxy85mnjhl* zd.ca,) e laced at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if5ca. hj8e lmx*nzy, )d 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 plac1fi br(4xr zu.ir8eh 1ed in two diagonally oppbrx1u.4 1h rie8fzri (osite 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 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 +2e, y c,v+mplr, gh n47 fib u/2t2-acrdd9mass $6.64 \times 10^{-27} \; kg$) 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 theq3hr)rmd0p)d2gg 0 f+0a czt a corners of an equilateral triah+)0ra c2 gmd00ad rg3 p)ztfqngle 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 onk j9eh rzd y -n+2ci52ch6*jjr the plates of a 2.0-mF capacitor when it is charged to 10* 2hcc6ji5d er jzhk9nyj+r -20 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 plates of areplszrw w9oq +n1 u;pctg* 6t0n)mtt+*a $0.50 \; m^{2}$ 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 plates are separated by 6c;2 zuh9r yre0.050 mm. If the capacitance is 17.3 pF, what is the plath;c2rze 9u6r ye 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 platrzg c4y 8i00ewes 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 capacitzi73o2g1 t1gmwhn-ug4p z ;ss or has a plate separation of 5.0 cm. If the potential difference between the plates is1suiwg7s hg1g;tompz z3 2-4n 2000 V, 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 battery fu.p. e )j+dexqz .+xj)q.dezpelly 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 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 capacitor. How much energekk dou7wmwddx9 ;982y is stored in the capacitor?k9 7 dw 2wdxdoku8m;9e

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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 in the capar 9b8sz9;;kboay . zfacibz.sb;a9f9 zro;y 8kator?

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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 connected tqgqft1lu6: v a-e l,)to a 12.0-V battery. Hol lt atg1-qf)u6:v,eqw much 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 it ly gh9j kb a);ygl1xb*l/vx i) ut08e-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 se m q-6jtr07hof 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 consis6fzeb8mcbk5g p9asa(l);)o xhl 7 rs/ r-) ecgts 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 arhqej2 s4x,u:d-0b4 x s8tsse rea $1.5 \times 10^{-4} \; m^{2}$ 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 wittr o,;0ih2ihx9yk(q hh 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 consml7hjram*t/q- +/r o ytructed 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 bxp4*q +fp vkcijt- 4+k1sf fr9attery 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 iqk*fr4++ cvtipsx-1 kff4pj9 s 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. 2d9h6wr( n +bmdqnjxd)6ke-kThe battery is removed and a slab of dielectric that completely fills the space between the plates is i9dn6e +-6m wd2 kjk (drqnhb)xnserted. 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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