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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 vect)2 +d5tf-b p:gbqyy;r- n8rdkx xt(x kor?

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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 * fvzts:r4mp 9is 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 sury6+0/urnep s6 :0cgr7u afnw broundings. Object A has a net charge of excess electrons. Object B is grounded. Which object 7:uf+60cap /yrw6ubr g ne0nsis 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 direction of the uysomqa+*/ 2y 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 el3 yd 26dg(lmy hoa*;mo ar9hd0ectric 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 conductih*p-cevli t*)w: fxuc6q*m ;wng 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 kcsnzi /w/w47s;)xmr w- 5vfwby a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speedn-iwkw/svs7zr4 )x fcmww ;/5 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 sq. -)iz(eks 9 3dvqxyuame 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 . lfs)eabf:s+ surfac sbl fs+:.)feae.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface muschc a16gwor; qnt)87( aozs b(6-g ro-ojtu g.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 car3 n rveh6r;tg*rying a charge equal to that on the electron as a result of moving;3 t6he vrgrn* 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 unn ram w:(kyb* q)z s9w0+qszn.it 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 corres8; mc(xm c9zfvr :pd9oponds 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 a positive point13irr9ghag )c charge is 100 V. What is the absolute potential 4.0 m away from the same point cha) ga3rh9cg 1rirge?

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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 lfyr2y.w cq 39*bs 1ysfrom a negative point charge is -100 V. What is the absolutlyy w12 bs93qc.sf yr*e 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 squa7tn reu1x2 :bj8uq .g4qig0nic0 yq9cre 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 also filled with a charge of e y.0 nqnc2 ixc07 u9gi14g:tuj8qq rb+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 shescm 7g.u7+dci4k2b quare is 3.0 V when a charge of +Q is located at one of the square's corners. What is the abs24 mbugck+ce7h .sdi7olute 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 alway0wy,/vr7o qp bc3rtfd z(*6jes 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 egxpqm q)-kzoh v/;.(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 capacitor4xc ,q a+3dgwl ykfmy; 36/mxss are identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the lar3xfg k+ ld3y/;y4cms,6x mq awger 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 hasgy7k2m4xbw11n r*s5 a h( lefg a capacitance of C. If the area of the plates is double n7r(aw*1ly4egxb f1 sgh2m5kd and 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 parallel-plate capacitor fully and then is removed. yj6nn 9 n0r qpqsoszt-5)lu 0 m./ntm( The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remainssz/ul9-mt j0my 0n6rnpns5()qto .q n 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 cg54 ry8o 4 fid-j-cuo fvgy(*+xezs)yapacitor is weakened, the capacitance of that y f x+z)c4f48y-5gyj*d(v ie-orgsoucapacitor

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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 witq6i,aclt- ;tmv1 cmc9h constant voltage by ac m ,1-tltqci9;amcv 6 battery as they are 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 capacitor are maintained with constant voloa 3girz)h+:4 :u wbta3)nieftage by a battery as they are pulled apart. What happens to the strength of the electric fieib:ae i:ztaohnu4gw+r3 ))f3ld 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 dielvxcjc9 f5/w.:kyms 8k ectric material between the plates of a capacitovwc5f s/j9kc:. xm ky8r.
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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 .3:hkimsz h(h)mc oo 3the plates of a capacitor. What happens to tzo()ih hsk:m. 3h3moche 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 kik)h )sxgtp 15fp ldzmat ,sh0e)354 as paper is placed between the plates of a capacitor holtks d ik 5)5 x lhp)g4)0,tmzs1pfa3heding a fixed charge. 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 caparq9;zblf 16m zcitor is connected 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 capacitor ha69brzmql ; 1fzs

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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 vd;1 r8tai c 4hebtbi-1 ud)+mthe eneb41-1eabddt8; vr+ iihm u c)trgy stored 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 giw,a35l ;orellw* wfn* ven capacitor causes the energy stored in that capacitoo;3wlw nw*ler, la5 *fr 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 poir4p3spjn 6h c5j, lipjm jx) 0hi40.mfnt B. What is the potential difference bet.0xjcij564pr 0mppjsim j) nhlf, 34h ween 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,sc th:+ftfw9cnv b-4*mk:aa- where the potential is -50 V -hc9nas4*b-:wf: + afmktvtc, to point 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 rd;g) n0gxd nmhh/j2 dkz)58na est, is accelerated through an electric potential difference ofz5 j8ndnx) mkghad2;ndh g/0) 500 V. 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 accelerated through an elec3 tc(cdin:lhftway (j- r8c9 ;tric potential difference of 500 V. Wha tj: fy9;8ci cd(h-c(tnw3alr t 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 ms ,cvx/0c)tm proton falls through a potential difference of 1200 V. What speed does ims/tx 0c v,m)ct 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 Viieq +: qcnsv f5e;c:1 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 accelervpiz+lv. yph-)o0 o. hated through a potential difference of 500 V. What is the velocity of the electronohh p .z-ip +0y.ovl)v 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 i( mh)d6n 11zccd+vlb-jww o3ms accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential differenczw()c3 m1j dh boc-d1 vwnm6l+e?

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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 betweeq +/w aet 94lzr42yhvll *pa,an two parallel metal plates separated by 1.0 mm. Whawpahzt429 l ye rq+ *4vla/la,t 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, id6(r(/0xv gzeqvpy.; yk,byv s directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential bg.r/ep dvvq y;v0y(zk6 ,(xy 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 ed:7,wk0of2r z tm s yrwu+ ;h7oryk6:tlectric field of 50 N/C directed toward the east. If the voltage measured ,ww+k0;7ym:h:6 7tof uz2tr krsoyrdrelative 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 directfb3a 9aex k8no-l c-u7ion of an electric field of magnitude 3.0 V/m. What is the change i caf9xl7 nk-eu b-o3a8n 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 connected to a 12-V b/4 x50nvo nygsattery. An electron released f4/ygnvs xo 5n0rom 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, n3 d49b.op wqopdjzj26q.:1 a wke -iqseparated 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 .pb. dqwoq 32o4 ijnj96zk1w-ed a q:pplate. 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 /o,o(ax cvbd*n/ / e9+urhzk gconnected 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 dista,hu (c+*ex rno zkg/vo9d//bance 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 N/C.h g 02hihgmwx5o 6xig)c/2ta directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is thew 2hiixg.g6tag5o h0 / )hmc2x 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 )zo)wpx9.rc nzkt30tfield of 50 N/C directed toward the east. If the voltage measured relativ ) wn) xk3.z09ztportce to ground at a given point in the 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 throughv qa*g0vf h9 03nv+ppa a potential difference of 12 V, it will acquire a kinetic ene+pn0gqavv9ph3 f*v 0 argy (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 of wk7 bp3;fqd;9 vi7xyp$5.0 \times 10^{-10} \; m$ 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 e0wt m gllsp6a5ap3gd /l8m6g. nds of a meter stick. Find the electrical potential for the center of the meter 05 a m8/l6gpwam .t3ggl6 psdlstick.

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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 min9bj-.vd32vg ow6cj , 0). If the potential is taken -wn6o v9j2 bgi.3dcjv 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 mf s2 ke8t;l.ca -2.0-nC charge is at (3.0 m, 0). If the potential is taken tk. m8 tscf;el2o 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, 0). If +ml02g/p2hiyb5q vcj the potential is taken to be +v2/0 yhb mgl25qpcijzero 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 at the corners ofy9 h7.wenpk ,h a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b =wenk,hyp7. 9 h 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 diagonaldcof*lm0lx:wf qrx+,k :j/a;qj ac( /:ppx e( ly opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 a:,xm:xq;xp* w0p cfaj rleo:+kcq/(lf(j /d 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 +ikpuong5 (7cag lz/. ux8ez0+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 charg l+jlre-+s-dow18u5kpa,-v( vcnsdbes, each of 2.0 mC, at the corners of an eqsuplrna- db l vowd-ckv5 8+,s+-e( j1uilateral 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 capac.wxdq i,y9, lxj *p4reziz 18yitor when it is charged to 10dpl.* 9 y rqzwi,ejx841,yzxi0 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 ar xuxrn0;w(+th 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 capacitor is filled y)kz kyqhm+5)lb7db01e(kjo(r 5pfo with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, wmo+j)kyobkbzh(5)1dy0 7 rep5 l(kfq hat 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 of are,wkfa p4by7 q88np.2twj -ug qa $0.20 \; m^{2}$ 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 the poten5pa(ykb 3d :7fh omcy0tial difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field betweenk c y :0a(po5dbyfm37h 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 tds*in x cd/df5t4 ..znhe battery fully 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 prizx.c4 5fddd.* ns/tnocess?

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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 ap jjy+67ft.x4xr mce w k43k(j 15 mF capacitor. How much energy is stored in the capaj3yrjke4j+w (4k67 mtcpx.f xcitor?

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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 c;mdz fv*ymz.eyr3 v g :jgy+/.apacy.v+:zzm/efdj mr.v;g y 3*ygitor?

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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 connec:lw r9i4oek a3:jbsaynw8 .hwclz0 8 4ted to a 12.0-V battery. How much workc raz.ewl ljyi :0b:89 okw4s483hwna 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 charge:t.0 v iz mhtmuf) m:y70msk6;sue:agd 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 4 l)nc wbtr+e0plates 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 consi uuzky2;/8rs - yckh(jyzz y6;sts 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 ar ,l/8et a:.-din pgd9s5s;3 zja8tnxytl e(qgea $1.5 \times 10^{-4} \; m^{2}$ 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 p qygsmd,vcdh 4ye1/-8late 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 capacitohfcb6f (67wfa 5ar w-dr 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 to a 50-V battery and becomes fully chargeu+tfm 9f78 4oiej5wd id. 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 capacitj7wdmu f 4+f5ieiot89or 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 cotz/s hv 67auu65vhge2 nnected 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 voltage across the capacitor's plates after vh67e6 s5uuz v/g2th athe slab is inserted?

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