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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 ay8 lup4s)f;3x8dzolo 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 p0i4g,8c9eq t) xkyny 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 arewjs-xp:e.a9(spjd 6 j insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounsj a:9(djx.pwp e-6jsded. 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 gids1,qsj kcs2+ x))idirection 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 tojv sr o5x4gu/* 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 psc0q)hrioy8 1ie kx :og62ga)laced on a hollow 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 rely/ n uk4:rf,cst to a speed v by a 500 V potential difference. If the potential difn,ul yc/k 4rf:ference 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 poinzc.a:ekykx mo e5u*30 ts 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 along an equipotential sukk46c0wa m0 bhh0te-b 6f v7(bs9zvcs rface 0bsva-eh04tfk9 6vbz kcb7m6cs (h w0.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mj6gu n6tjr:n n )vo:7iust 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 l229buy+ts8o gf3qmy particle carrying a charge equal to that on the electron as a result of moving through a potential difference2t983s2qmyf +gby olu 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 unitlm-fw;cb5der5x m)hw 9- qzvdbq6i 6- 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 wihb5l/dj- y+xw c8sw(u..sfto

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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 pos j7./vgtq,7zp dk4i oyitive point charge is 100 V. What is the absolute potential 4.0 m away fromv,dt47 jyigk/p7. z oq 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 frd + b +ky.e1zxgnub1jwk1/j2kom a negative point charge is -10b +bxn .ekw1/zuj2jk1gdy+k10 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 square is 3.0 V when a charge ax1ddvf je9 ;(tm/ v5dof +Q is located at one v tmdv(d x/;fje95d1aof 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 s(, re kkfy6 im96vfk57i9 itijquare is 3.0 V when a charge of +Q is located at one 5y6 i,9 r9(tfiekjikm fvki67of the square's corners. 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 alwaynd d7ipfo+:/0 2qirxg o11r yxs 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 k7h emgq(9fbn. ; /m+rf4:tscw5hej uis 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 invim 7v1zcf k(jwc( (1k every respect except that one has twice(cmc7kf(k1izjw1v( v the plate area of the other. If the 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 of C. 5g0ssfks o :b4 If the area of the plates is doubled and the distansk50gs4 bos f:ce 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-plap1lhlln qsop(snbwf)7r 86 1-t14iz j te capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates r 14s7q (n1w1lo bzfpih)nl6 t8l-pr jsemains 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 b adm1r ,5tgsa*1c)aiwetween the plates of a given capacitor is weakened, the capacitanc1idca5 asm,) wr1*g tae 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 maintainedw2+jhf/lz m em1s* upj k5)nk7 with constant voltage by a battery as they ajln+ke/2hfp7 *zsmu5k w )mj1 re 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-plate capaci/cjd b*7cqgdnve2)0qo :y-;8 atr llo 1.vfk ctor are maintained with constant voltage by a battery as they are pulled apart. What happens -cqc:jld *rtg2v8d)ebo7vo n; qfa lky0/1c. 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 tx2 ipc6k8nehz h8) ;cnhe plates of a capa88chih kn;e)6zc 2pn xcitor.
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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 placed between the plates of a capacvn *zg5msu t09itor. What happens to tm5vn s9gu t*0zhe 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 i3zdp sfg170ua6vq1h zs placed between the plates of a capacitor holding a fixed charge. What happens to the electric field be 61dzsuvz70 1g3a pfhqtween 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 battea d/ 2jvebmea42dbu 30ry and becomes fully charged. The capacitor is then disconnected, and the separation between the uj2 3a0eddevb4 b/ma2 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 constant chargemd/uc-; xk.vm causes the energy stored/kdum. mvc ;x- 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 u4plqin 6 w(5ua given capacitor causes the energy stored in that capaciun5lu p46wq( itor 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 enerf/hz: )j 9i1 iio+dr;x +o1c c5ybwdesgy to move 10 C of charge from point A to point B. What is the potende zc o o1bh:;+wsdfi/91yr+5xi ic)jtial 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-jvx( f7rs n wfshdv:z08 r;a:-3yjwhg an electron from point A, where the potential is -50 V, to d wysr-v:xfhn-w fsv7 ( h 03:r8z;jajpoint B, where 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 accel mcr7xa azpycb-:f4 a n,afp44xb p+9*erated through an electric potential difference of 500 V. amxacf+- :n y ppaz44r4,79b*fpb acxWhat 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 accelerated through an electric potential di5qy t66hp1xbrfference of t6x1 ypbh5 6rq500 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 through a potential difyvni ;a s+mfujz)c(0 ,ference of 1200 V. What spjzufs;ny+ vm,ia(0 c )eed 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 movingfrdb9/5 b caw, $8.5 \times 10^{18} \; electrons$?

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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 throughm74f( wk9yd at a potential difference of 500 V. What is dy amkt f94w7(the velocity 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. The object is accelerated /- t-q*bb:sp 6in yeohfrom rest through a potential difference,y-b *qe/hsni6o-b: tp 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 electrical potential difference between twoj 3 nhifh*(k)o parallel metal plates separated by 1.0 mm. What fkj )n*i(3ohhis 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 ohc kef t198oplp0n7n0 w 8.d hruxt0-bf 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 207tw 1pf90den.0hpc-rb8 ox tnh8 luk500 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 N/C dijt.hr.* h : tns p+2mhlc q9;cvs0ayu.rected toward the east. If the voltagen cmhl .:+s.ha;h *jty. up 92qtcvr0s measured relative to 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 direcfq:j;p ,c e98 t)ugglgtion of an electric field of magnitude 3.0 V/m. What is the chctl;f8u gj eg) qp9g,:ange 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 connectedh+tw*3a,eaq zs (luuqfr gxe nn/0:91 to a 12-V battery. An electr/a3g,u(ensl9ex0 uw:n a frq* zqt h+1on 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 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 t4*k8v6k +ppwvwi pxo6 o a 12-V battery. An electron released from rest at a loca+kpwv*w v6x6p i4pk 8otion 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, separated by 0.20 m, are connected to a 12-V7ow gd4; vhiz ley2(e. 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, whi.4 2d 7le(gwezho;vyat 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 toward the eas)yjbpy: ) ugn.t. If the voltage measurjy:.g)u b)pyn ed 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 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 thed w7t8iwz(1:uu3mk 6vqo (ln b east. If the voltage measured relative to ground at a given point in the field is 80 umd(w z n:b7v6i3q lu(wto81kV, 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, it4.dxj.: ttqogmv 5+do will acquire a kinetic energy (in t .5jv :oxdgqd+m4t.ot he 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 at4( pa,1.lnm8egnq abyy9 tvp) a 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. hvtm r4, -fe1 xsgnmwrjzfydde99i9 *c .(q41Find the electrical potentia m* 9, 1 rqsx9ncy9.gm-1i ftdedvwrz4(j4efhl 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 -2xia4 ;hdl5ed5.0-nC charge is at (3.0 m, 0). If the potential 54e ;lx5a hiddis 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 chargb gd+egv5;utb;1qq b,e is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric utg1ebbvg dq b;5;,+qpotential 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 (3.0cei0q.a;s *y l m, 0). If the potential is taql aey i0;c.s*ken 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 a4 xoc9fi-/ y,am tywt/t the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = t,4oy /xm9t/- fywaci 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 aa afby 0fgc8 a /xqtosso0/-85re placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute paaof/0 5 o0qtx/8g cbysf8-asotential 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 +2tdk5d;xcf28 ae, 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 necess/-/6,eap 9 etekaqux5*sre ot ary to place three charges, each of 2.0 mC, at the corners of an eptqas5ou-9,a r/xeet *e/k6equilateral triangle 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 the plates of a 2.0-mF capacitor whzp4 :kzn4c0vm 9/d x 2pe+xpxeen it is charged to 100 0z/vm npk9xpex dcz:2x4pe +4 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 aretgbz,j:y)2 u-uxi s.ea $0.50 \; m^{2}$ 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 capacafe kf.f6vghty( 2; (gitor is filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate area?ft6egfhk v.f 2gya;((

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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 plajzc uv-3ymdo8w bzce fq/(,n q:x1o /*tes 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 separation o 9s+4/t sf3 kxujxcftekc -*m(f 5.0 cm. If the potential difference between the plf4 fs+ktj-kccx*/u9t3e m sx(ates is 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 odq4b w7mx-5ze3 jf5da 100-V battery. After the battery fully charges the capacitor, the capacitor ixj-7z m55fdq3o4 webds 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 energy is store8:au6 5q zp6k5kt x:vxp7 fzg. zc7gwyd in the capacix7y6qc6: z 8f5t kga 7ppw z5.kugvx:ztor?

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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 acrosst79* j0i* e zt nxahng7je6k1e a 15 mF capacitor. What is the energy stored in the capacito7 gezht7j t0jkn*e *ne69x1air?

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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 o (zhdh9r b)7gn v4wn;rf a capacitor when it is connected to a 12.0-V battery. How much workz9g )h7 wdv;bnr nrh(4 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 stores sv;tuu 1xdc5c:vz 5 o4$2.0 \times 10^{-3} \; J$ 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 capacitor8 jvfwoa-5o697dzgtq 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 consists of pla6 ac s(jr8 isf3/v,ajqtes 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 ozn; oca )yeax nv23 f:xb 6+q+-4uidypf 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 con2ubr ;(x)h -gpkhdp ,89kb aslstructed with 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 capacitos7zrpe jz6e-e7d6e s;o/ hn i7r is constructed 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 tu 0l*;,qdsaj-a uyv 1to 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 i01ay*v -aljd,uus;q ts 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 chn ;etm*k/img/*aaywq9 (r t8jarged. 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 across the capacitom 9mq *(nt r/ye8/;ga *wikatjr's plates after the slab is inserted?

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