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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: 游客未登录  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 an6d,m0x;1n1xe:vf e zr szf6s 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 coulomakz/k;xrn9 so5 a cn:(yd68 sob is 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 invy563s6mhy qu sulated from their surroundings. Object A has a net charge of excess electrons. O3 uy6 shy5qvm6bject 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 i2, +gnuclmdkv 9 zzhh,v(g+r ; 8di9adn the 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 to the electric fca ;/9g n ) *;-j qap87kr5yzomuhjgydield

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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 cond.n2qn880.4dxf z l aym 0hujayucting 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 accelx ywm3bbp89m6 pno*o9erated from rest to a speed v by a 500 V potential difference. If the potential difference is cha po*8b wnm69 9bxoy3mpnged 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 pointsp3cgok4)*s hu 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 q;yl-j3zkd 7emoved from point A to point B along an equipotential surfaceql3 yk-zd7j;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 bekkmo6 m +xo /c+o)vtlzclqp d--7n6*b

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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 th)/xr hb yd80dmat on the electron as a result of moving through a 0x)8d/ryh md bpotential 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 okc3 j qa(uspe-l , yc-r6b63bof

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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 t4mf8w( n3 obxjo

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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 (7: yx0 or otpnuez 7,z5+cifzfrom a positive point charge is 100 V. What is the absolute potential 4.0u,oi7fnepy xz:o0 t 5czz7r+( 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 y 4vqxy-lcablak 2xgy5+*d7 1point charge is -100 V. What is the ac74dl+5l*v g ya1xybq-2k axybsolute 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 square is 3.0 V when a charge83t 4ggg(d*r bcut ok* of +Q is located at one ofg(rd u8gbt*gkt*3 o4c 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 ct:u:d*ip):v x m;m puhl)5qlqenter 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 slimt:5hux)) *d mu;q::pv pql quare'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 kn(i7 z/(lm.ha qu)/dv c ikrc7dv4u6that 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 cdi;/kjnpehq.)h08 mis 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 exce62zs-mfi: +wy n yeo,hpt that one has twice the plate area of the other. If the smalle, w- 6y oifm:nshy2+zer 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 of C. If the arkc mtnzs8w y me/f*rw1c9h ;7pi )z3c2ea of the plates is doubled and/etz)9; 2z8m73nc* iwpr1kc cyhsmfw the distance 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 paraav9axn 2 g+;vfllel-plate capacitor fully and then is removed. The plates are immediately pulled na2v +;gvaxf 9apart. (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 given capacito ) .oh p9n;ebr+mfgbd8r is weakened, the capacitandrb;8mb9ofnhg . ) pe+ce 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 constant vokxqe bg:/c3t (ltage by a battery as they are pulled apart. During this process, the amount of charge on the/q:k ctg3x be( 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 co5oktkwb40hpq0i+/x p pn 7 gy1nstant voltage by a battery as they are pulled ak70g/tpw+pxp4ynq b 1h05o ki part. 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 dielectric material between the pl,9 f7twaz n9taates of a capacitorz9 wtt a9,fa7n.
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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 paper is placez . 6qfm,,8)n f2yulfsadi2hed between the plates of a capacitor. What happens to the capacitancfiyhazl8q6nf, )s2. e2udm, fe?

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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 wnordx 4 i4 6kf1( jgtl0kx5r)between the plates of a capacitor holding a fixed charge. What happens to tj5or4 ixl(146 gfw0nk)rd txkhe 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 frx.5wzuu/n - becomes fully 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 stored in this c.u5z wx-r uf/napacitor 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 w5um lvbjo o+u)r+ob6wqtez7hf 9*3:energy stored in that capac+6* 3 +uzofeluor5:t9mww vbo qh7b)jitor 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 capacitorn*9o1 nklm r6xq)cv.h ff/xorgzb3-. causes the energy stored in that capfc6qm1kbol..r39 nxxr*/fv)ho -ng z acitor 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. Whatabp wa9x 6;hn2atj au j5(o:+c is the potential difference between points A and B?wajj b:ahp ; 6 +2catxn(5a9uo

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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 pote7 wn,8ygj0 3jc +8xo/unwf vkential is -50 V, to point B, where the potential is +50 Vv /xfnkjn0u7+3yo8w wj g,ec8 , 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, isq /)qy hba:x:a accelerated through an electric potential difference of 500 qyh :)b/x :qaaV. 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 atq np3wjd1d)2 k6ba2nccelerated through an electric potential difference of 500 V. Whqtbj32 6dd) nkn2 1wpaat 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 throuxp.u+ rway du8x8rw //gh a potential difference of 1200 V. What speed does it acquird/ p+x8w u.yrxua/w r8e?

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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 mo:nn+:c p:lts 1ov ibf5ving $8.5 \times 10^{18} \; electrons$?

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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.08l vb2 9q/o gtmv4hab What is the velocity of the electrv9qb8ab lo/g ht4mv20on 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 ac)vytte)e9f z8:i2jx pcelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/ey)2e t8: 9pvji)ztf xs. 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 electricalzx s2a4:c ij6ygv8kf- potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the plates2-kagfxizcs8y j6 v: 4?

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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 dif gb0v bs9+ddo3, -(e slam+sirected parallel to the +x axis. If the potential at x = 5.0 m is ssl(+be f, sd+vo-9am bgd0i32500 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 fiet*s d0ut3 h1yuljvi-6 ld of 50 N/C directed toward the east. If the voltage measured relative to gr tvh u udy0jst1-i6*3lound 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 direction of an electric field of magnituk2 l:x 01fpsplde 3.0 V/m. f0xp l:k1p2s lWhat 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, areo01l f1ph-tqd 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 tt hdfqp11-lo0 he 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, separazocd 3v.h -v0vted by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 h v.vdv-0cz3om 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, separated by 0.20 m, are connected tft x8 i1nr4+3yw4 jxueo a 12-V battery. An electron released from rest at a location 0.10 m from the negative pwf81 trx+xn4y 3euj4ilate. 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 5ebhg vayfr cgz r4gl-,;+y0;N/C directed toward the east. If the voltage measured relative to g, l;v; y+yf5gg04rher-agbz c round at a given point in the field is 80 V, what is the 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 directt /odf;m)d; s8 2hepxjvzh( ,ned 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 pointp v 2 ;dxzho;e(f dsh8,n/j)mt 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)bb9)xr1jsgja1 nh+pgm s l96 difference of 12 V, it will acquire a kinetic energy (i 9 lb)b gj1)gjh6rnas91sm+p xn 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 2ofyvel ss (,(6r3yafnce 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 pot 7rj31 vgjj/14 qofw7ihxbq 0dential for the center of the met wvg bij 1q7r03odfq4j1/h7xjer 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 (0jdf6c4 6d)4(-gpr/kfq o*9bv4zqr c oai*euy , 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what iyc(6-b/pod*k g9orj zv4 q)f4c4dua eifr q*6 s 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,ix ttu.-n3ij8 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is 8xi3.tu tj-ni taken to be zero at 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 (0, 0) and a -2.0-nC charge yb *ep5 )20dp4mgrpr mis at (3.0 m, 0). If the potential is taken to be zero at infinity, what is th d pmpgy5rm2pr e)4*0be 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 p0gfq8 ew.jxqq+7-o jk laced at the corners of a rectangle of sides a and b. Whkjq-8o +.qxje0wfgq7 at is the 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 arexkd9 a) h: l..cd.dvfqb0 *iih placed in two diagonally opposite xd* qib0vl.)hd 9c:hdfiak.. 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 (ch j5z1,x bup0xtarge +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 1(iaxnkzu8m /6h y+b :zru ;qacharges, each of 2.0 mC, at the corners of an equilateral tm x/1bz+i:(;h naqrk 6a8uzuyriangle 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 twc:bem/2 n/ b/ory1hwvp5 lbpt.2 7r ehe plates of a 2.0-mF capacitor when it is charged to 100tb:/cbem1 b2pnvl/ 2 h 7rr/w5owey p. 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 1vktwe mpwg38:w d.+tplates 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-zs1b+civyogs8kl6i/ g*os (7br .z h the plates are separated by 0.050 mm. If the capacitance is 17.3*gz6koc hyi78rlz ( -sss1.+ob gvi b/ 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 capa* lgi.(s:xy oqcitor 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 separqv3 :fiqm :hog /.(sy-bipk+ bation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is hmf3g /qskyi q+(::b o- pi.vbthe 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 t. xbr:1fjcn)y he battery fully charges the capacitor, the capacitor is immersed in transformer oin rb.c1yfxj: )l (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 7ty, a z9nvs-nplaced on a 15 mF capacitor. How much energy is stored in the capac97aynv,n -st zitor?

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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 gm u:.rf h)k8g)wnn18-y llxvenergy stored in the capacitovy h fxm u-g)8n8)l 1:gr.knwlr?

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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 m7z 4fct(s6c/xjy r6a a capacitor when it is connected to a 12.0-V battrmt z4c67f j/xcs (6yaery. How 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 ts4pu/djs9wa5dc 5 4 1yrj0bos9 u a6bohat 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 capacix8fwa-bp24r q-3p /d mj0imgstor 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 consis .a/ g6kad 9)yjd.ovcyts 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 o sv fk6r(qg-mit6 qm1+n kn9os:l uu+6f 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 with pl /*b+catp5 lsy3mxm + oeox.e5ate 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 wgc7w )rr*c nxr-ws2c8; : qtfed:7s writh 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 chargnct +::ongibdi6g ) 8vt6qg;ped. The battery is removed and a slab +tg)o6bigpg c :86v;dn: int qof 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 con8: zx3h4f us vfnv bl8uy39y1wnected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fn1bu8s v43z 98wl:fuy3x h vfyills 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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