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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 veca:5nati /;9edu fxh8 stor?

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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 6ecexmv)6q7 ) xfd7z ta

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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 surroundingt sy,+m psj+-fs. Object A has a net cha,mps +s+-tfyj rge 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 the oqt8j 7 whuck/y0h(l/ 4yxikpk-eo)9direction 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 e 3)7.zp g1 z am(v6wv7ghckjfklectric 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 conduw5fw2dgvj z89u6i *pi cting 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 adq4fn*- c5e. m4s teml 500 V potential difference. If the potential difference is changed to 2000 el4*5ef-n 4mqdst .mcV, 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 *sr:8 g:/o9ht m+3:u2bw.ijrkvan k1 wu ttayat 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 equipotenti cnwm2lh)w2g , h/:dw8 uh(kxtal surfac 2l:mtn(wh8 ,kwd)h2cx /uwghe.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mus(m*yxnm *m* cvch,)ov t 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 the electro*kt9-e lpnb3 i 4:iwkfn as a result of moving through a potential difference of onk4lbe*: kti9w3-ipf ne 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 ungl-8 )s xfbiqtsr*m +1it 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 correspondsdve2(jcj /0pryi:(h n 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 2.0 m from akbwq j 5,/cr8 ma q5 hf0hsatjm3:ge*1 positive point charge is 100 V. What is the absolute potentia8 tm sm :b* 3k5qrhjf/0h e,gq1wjca5al 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 distance of 2.0 m from a negat *;wzcde32x euucla5+ive point charge is -100 V. What is the absolute potential 4.0 m away *c3w ee5udza +c;2uxlfrom 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 wt;pp;b26 + mq-be,dylir4cxyl (h9rqhen a charge of +Q is located at one of the square's corners. What is the absolute potential at the sp+hq xdi elrtly-6rm;b9; ,b pqy(24cquare'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 q 8 wbo04yz .wcvowa9+a charge of +Q is located at one of the square's corners. What is th9q oz8vc4bo .yww 0aw+e 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 charg4cvw tau sg(f4;u*)mves 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 a//ir t0fa hok+

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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 that o5r.8p s5t bcldf9g8*o g( katgg1 ivd7ne has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitancefrsgi7(t 9v.*olp gc b55gda88d tk1 g

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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 8 y8vb7cgs:st0rw*r j8 mn q5fthe plates is doubled and the distancerjvnbwg msy0t85 f8:qsc78*r 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-pla;pa+x e c07d 12dapsxd kg-sf+te capacitor fully and then is removed. The plates are immediately pull0 pg+adpak +2x;7f- sd ec1dsxed apart. (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 thf -g 9ixpi7mp(:lbs,fe plates of a given capacitor is weakened, the capacitance7s,f9i(l - ipx f:pbmg 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 capacit 5qyqs5.+at wa +ody.( )s+wawil yen: t,jp(tor are maintained with constant voltage by a battery as they are pulled apart. During thitsw5 yd,paao qw.t.l5)e(sjwt+yn+i a +:q y (s 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 constant v j3 barfrkd5)x40qo 7yoltage by a battery as they70bjfk x)rr ao45y3dq are pulled 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 dielectric material between the plaf dzpaex dv-9l;s0c94r pg( s-tes of a capapx;vpsa4 c 9(d e-0sdg-zl9frcitor.
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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 platf*y )5joqpf 8d2lx. iaes of a capacitor. What happens to the oly fa)fx*i5pq d.j82capacitance?

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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 1 .ut1bm m9h8umiqqyz4 ae1 w-n0g)azbetween the plates of a capacitor holding a fixed charztu- nwy1zgha4mm8e a0mq9 ibqu)1. 1ge. What 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 co1tewijwrmi a9c,s; k6g 7*ya, 1b+krvz*xq g3nnected to a battery and 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 capacr*g9sm r kb,x+, 1a1iyaq;kc*6ij wvt7zw ge3itor 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 capayda,jr0(g48w4nh gb s9-o jktcitor holding a constant charge causes the energy stj8gayg-wtnhb40 jsor9k,(d4 ored 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 energyy* cvz+fjaybcf 4acd4 (5g w. oqx:r/4 stored in that capa fc*aao gbr c/zyd54+vy4qf.4 :j(c xwcitor 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 lh-01goah 61hlx 2l kpm4yl6lA to point B. What is tlg a2hpxl4lhl 10-kl h6 1oym6he 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 moving an electron from point A,::;w:kvyr mpnk .7yqh where the potential is -50 V, to point B, where the potential is +50 .y:y 7km krq;h:nv:wp 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 thrfmv *yfkb. :i4ough an electric potential difference of 500 V. What ifk:mf y *vb4.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 diffe g(waesf41 lg.rence of 500 V. What is the speed of the proton?lew( ggf4a1s .

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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 f 3m8rgg7jcw/lrumiqpm:9(g3 alls through a potential difference of 1200 V. What speed does it 7qr3g3 miwl /r89m(:pc ugg mjacquire?

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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 moving 3piah9xh2x eg0vyx.3$8.5 \times 10^{18} \; electrons$?

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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 differenj0(,.s h pnovfce of 500 V. What is th .f(,vns0p ojhe 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. Thqg6*7j u+8 y.eye k a 7:pyo9athhvy7fe object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the pote.* yah7+vkgpy:e 7j6yuyheq7tao89 f ntial 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 potentiv 1izno;5 a*hpal difference between two parallel metal plates separated by 1.0 mm. What is i;pn zahv*15othe 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 fieldzgod0t*g,* o03 ipcc v, with a magnitude of 500 V/m, is directed parallel to the +x axi ,c togo0cvz** 03gdips. 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 N/C directed(nix93 9skgeu toward the east. If the voltage measured relat3esg x(9ni 9kuive 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 directh) zm;yjnyh) 6ion of an electric field of magnitude 3.0 V/m. What is 6h z ;ym)hjyn)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, separatedwbt / 04nwju8wm*c+ jx 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. Whtuj/c4xmnw0j+ wb w8*en 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 to a 12-V batt/yqzi 3oxq+;tery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distan/qztq+3 ;yo xice 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 :i3u35 xa1e ksh +qy gep4,vfpkw+q5l 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 0.050 m from the positive plate, what 3 p3l+e,u iqh5pwesgqk:5yx 1vk+4fais 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 Nkx)(ljw ngk )z38qa8ai4h3 nw /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 z4j )3)qhw8iga3x8 k wl(knnaeast 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 electwk-isvss1m5zy/ydkt.9 14h w ric 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 5vdtm4w9z ss/.k1 yyw1ishk -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, it wil;rn5 ixl47m.ulmg+g j,rkf (ll acquire a kinex.u(lg+mll r75,fgk j4 i ;rmntic 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 distance,j x8.zep5nb e 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 electricagacmyvi,;; o vhc 8wtg14- u-hl potential for the center of the meter s -g,o -;cg4i1vywa8mv ;chhtutick.

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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 is at (3.0 m, 0). e4tp*lw/hnw phoy /(7 If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4.0 m)? tl(* pphw/o7/wen4hy

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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, 0). tja r2 7 lf79wcq:8cbe/-ktonIf the poteb w8/:lc- 2n o e7q9tktfrjac7ntial is 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 is at (3.0 m, joa n3yf/y4 bq5u/2um0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from5j// fy bq3nmy4uuo2a 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 rectah8 ;1,gmd biglvffx;+ 74 wtaengle of sides a and b. What is the potential atd81bwt+;fmeag 74xh v ,fg l;i 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 1h res.*/ fhgg*df39k hs*jhb of +4.0 mC are placed in two diagonally opposite corners. In the other two coh1*3e/hbhgs f f .k*r9sh gd*jrners 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 1 /xqb k37kmh4zlp/f4shm8xh +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 pljc3w p9xjkfec )s-fj4s ;m )8race three charges, each of 2.0 mC, at the corners of an equs4few -j)jmj;xr c)98fp kc3s ilateral 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 i 9j-komwx 1 1)*diwnrthe plates of a 2.0-mF capacitor when it is charged to 100 9 1*knmdr-xo jiww)i1V?

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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 plat3hmb. v-gqfva 4z(ib- 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 plates are separate-c 9oqeokj:; td by 0.050 mm. If theoq k;-ctje: o9 capacitance 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 capacitntbo/w(;2p(t3jray6s 2rwt cor 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 separation of 5.0 cm. If th). s.4*ejea6k grk,o5nyqujkx2h4 zr e potential difference between the plates is*k)y6,xe5e2agjz k.ok u.s rqr nh4j4 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 connchbio9h)h2i/ ected across a 100-V battery. 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 b2/)o c9ii hhbhattery, 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 7hqi vlzt5t ( 9d/1itd15 mF capacitor. How much energy is stored in the c vhqdt1dlt5it/ z(9 7iapacitor?

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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 acros n-u953+je cyv(+y klm evlwp7s a 15 mF capacitor. What is the energy stored in the capacit u+enk +yv9ypl3w7v-cje5 (l mor?

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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 g.ir*e w,ayh;plates of a capacitor when it is connected to a 12.0-V battery. Hay wg i*.r;e,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 that it sto g nn/d-,kiy0oj6he1 jp vua5-res $2.0 \times 10^{-3} \; J$ 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 conkz4hqxb4mt+i( wc4fkl:0k p*sists 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 plates of areawbqyx wis5bt z/.rv,wek . -5yyd-( ;p $1.5 \times 10^{-4} \; m^{2}$ 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 plao 0rm3(99 daf sv gnj xd;hy78d1vx,vstes 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 capaab1qh ww* 8nh,x4ty3ucitor is constructed 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 capacitor is constructed with plate area z5vnnz1:os8 j 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 f 4q/j+p nyzqqi-xtspi8 /6f/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 is ins8fz n j-iqq+it/spy/p/x 6f4 qerted?

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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-mjl0n g3 4ycc charged. The battery is removed and c y mlg30n4jc-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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