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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 bjsmyd4l ,pb8z8ra8-or?

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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 im 6 (lya8+qf9rdjl( 4q3 * xggqf9yheos 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. Objezm-5v2ohu6 e xct A has a net ch5xuz 6oh-mv2e arge 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 direction of thj 0h 3x9 j:d1l.y xwpk(uufu7*4kjzcre 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 opposi*n,y9a ovmig 9te to 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 hollow conducting sph3 3henru0g uhb 3.l3+ huxnpdh4kj-f(ere. 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 b - o:iydo in*ry7d:.ofy a 500 V potential difference. If the potent7o ndfoyrii-* ::o .ydial difference 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 points are at the stts*w+4rif h62 0s sfuame 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 poin b)bdj:9 5s+jh*f1w 9lo zhg lr/qfgc;t B along an equipotential surfaceg;51ql+ 9jg*sbhdrwfjlb:fhz c9 / )o.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mu c c 80.sr2oob.8pbiptst 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 cl5v):4l1m b m 8lpgpdr8llf -oarrying a charge equal to that on the electron as a resull)gmfp1:dol l8 8bpvm4 l-rl5 t of moving 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 o pgm.m5u ml v(:k1f1ha 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 corresp+92uby- a ilmjkp1,rr4x cly6 onds 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 /np( 2 hiip6twdistance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from tn /6ppti(i2wh he 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.s;) pw8;/ oz tdt,o5 ycaqyh2t0 m from a negative point charge is -100 V. What is the absolutey /z;w 5,atttq8oh py;d2sc)o 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 +;ow6wh rh arz)g* rz9square 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 corner*rw;ghzh) 6a9 rrz+wos 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 avbc74 f0quvc/ t the 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 poteqf 07vcub4 cv/ntial 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 consisr+pbqgqm 2, s-lz 1q* ugnn,9zt 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 voltpqs p,w 7u4ha) is 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 re*dtzv+g: svkz ,5s(agspect except that one has twice the plate area of the other. Iss( g z5zk:,vd a+tgv*f 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. If the area of the plvhdom 7qc9ktb :r4z1 6ates is doubled and the distance between the plathd479:v1z cko m q6rbtes 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-plat t.sab/owo1 73ct2anze capacitor fully and then is removed. The plates are immediately pulled apart/s a.7oabzco tnt12 3w. (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 pu+th ,azzw7*kvxc;q :lates of a given capacitor is weakened, the caz+;hq ckz :x* ,vwtau7pacitance 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 parall8g7+mgdtx8z gel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this proz+td8m xg8g7 gcess, 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 art b kupmr 4(94xqs)qi8e maintained with constant voltage by a bat9 qu(t44pkmxb8ris) qtery as they 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 dielxsho( ,7vu (weectric material between the plates of a capacitu(, s(h xo7vewor.
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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 muzr8 k-je0 jsvp mtc9a/fwu )j*1:s5+i;vovbetween the plates of a capacitor. What happens to the capaci1jm fj/ kszew9s-5vivtamo ;p 8*:vuj+0) ucrtance?

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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 between the plates of a capacitor )uo tud g7o/o-v,v:wy holding a fixed charge. Whato vyvo u,/to)u-:dwg7 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 connecbxpco::gb 8z3:7/t2cc cqdgb ted to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased 8q gbxt7cb2:bdc:/ o: zpg3ccin 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 ald+6mh+wh2k dj .;6 qs6josfo capacitor holding a constant charge causes the energy stored i 6q2+jwhojdkl.6 o mdfss6+h ;n 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 give k (jfxoy;wh.)n capacitor causes the energy stored in that capacito)ko;.hxj f(y wr 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 mou4kvumtw0(l +kp ilj3kz q5;s m7m/ng /a-.osve 10 C of charge from point A to point B. What is the potentialtkvmkl/w ol 7 m s-4 03s;k.p /(qnm5u+giajzu 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, where the potentibqjie k :b6m))al is -50 V, to point B, where the potential is +50 V,m6:qbebi)j ) k 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 electrico;k9du ,q/g)pw j7iki potential difference of 500 V. What is the kinetic energy of the protgjp;kwiiu ,9q /o )7dkon?

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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 dm2m7 l+po 9nbiifference of 500 V. What is thm 729+n milobpe 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 difference of 1200k1f/jpu;9nr/ff. kwi*p ;tg b V. What sp;r;kf9./w ubgkntj1f pi* /fpeed 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 moving 3-4o etugx*je$8.5 \times 10^{18} \; electrons$?

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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 j(npr0q2tf d3* g(: yvjw +ozc500 V. What is the velo03(f 2j ordy+w nz(jp*:tc vqgcity 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 accprt46 gh -j-omelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential differenomgt--p 4h6jr ce?

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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 electrica2mf; wo/gjvdng0 p:c/ l potential difference between two parallel metal plates sepf2v:w;0/ dm ggo jnp/carated by 1.0 mm. What 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, sf*wr*(uatz r51:uh t imt0 w*-o4fep is directed parallel to the +x axis. If the potential at x = 5.0 m is 25 5:u -tw1wptu4 r m**zhre0ofsai*t(f00 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 toward the east. If -5)0v cpep t 9xm5q1t9)z:rradgac dp the voltage measu990r5ta )5 pdvrtm1g :xcpz-qepa )d cred 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 direction syz (hs766ps hh :w46fpg vw+wof an electric field of magnitude 3.0 V/m. What is the change in gp64sszs6pw vhwf+w h h:7(6y 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, q3;0;jgd v3 jnw;c) gqndz* k4c6suqn33sthrare connected to a 12-V battery. An electron released from rest at a*;33s q4d 3cnjuv 3nh 0zj;6;gkc)r stgn qwqd 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 qukjf.jzh,-4t( rn g:u .:5cl a8eim0cjm wf 1by 0.20 m, are connected to a 12-V battery. An electron released from reji -u(t:lc rz.qmw05,jf:a cej ghmn4kf8. u1st at a location 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-V battery. wg1, +x5gtr n ef91jpb+bbv3z*2upnj An electron released from rest at a location 0.10 m from theb5 gr2zn+93 *gnjp 11vbu tje+,wxfpb negative 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 N/C directed toward thyn,- 1jo ypr1pe east. If the voltage measured relative to g ypj,npr-1o 1yround 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 qra* htmf51w 5directed toward the east. If the voltage measuredfqm1at *w 5rh5 relative 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 through a potential difference of 7/pfkwdg x3b :/rc,h4(bi mzf12 V, it will acquire a kinetic energy (in the absence of frictionmpb/kx bfh, gfd47( riw:zc/3) 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 potentia srh97(0qo xxhl at 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 s.5n z6rm 1u8xh7l/ l vtf*epvltick. Find the electrical potential for the center of the meter stick.lve 8phzmf n1*5u67l trl.xv/

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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 i6i*p/ n(6zg q*a xh j-d)hnwl-2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at i h 6i i6*jnlnawx/h(g*-z dp)qnfinity, 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 chzfo9m )h r 5sak6,1zwgtn0t+zarge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is thezat19gm ot6nh5 0zw z+fr,sk) 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.g kyirj ri/qqf( 3f;m:h;rw*8 0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC r ;q( k8i:mihjrgr*;fy/3wfq 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 a31m: 7ow6:ifmwc0qtr nwv q9of a rectangle of sides a and b. What is the potential at the center of the rectangle if q =qwc7r 0wwn f1avom9: t6m3q i: 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 placed in two digf6tr,..o fh hagonally opposite corners. In the ot hgo6,.fhftr. her 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 + 6k58dc-7dlvw5vljt26fqx coko: d0i2e, 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 charges, y -,1oxx1hkm ueach of 2.0 mC, at the corners of an 1x-h1xmuo ,kyequilateral 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 when i k 5ffw* grxhg/ui6z-5t is charged to 100 Vx g5ufr g 5/-zwhk*6fi?

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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 arezd oz4jj5w3/ f*bhf7h1ppdwig *k g2 -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 capacsww2(+rxsyy6 8* 0tp ouf*jycitor is filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate tc0*y pfywr +*uy2sw(x8o6sj 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 offzya 92so 18tv 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 p n 7/zu* ipo,xnwj9c8jlate separation of 5.0 cm. If the potential difference between the pli cuwn7onzj/8,9xj*p 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 connet:,- 0ov w 4rii0lgybvcted 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 battery, which remained connt:wgl4,-oiv 00b yv riected 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 onqmwh1 /aaw*ah5ux( l9 a 15 mF capacitor. How much energy is stored in twaw a*ahm/h(51 uqx9 lhe capacitor?

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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 stog)rrp.f p49mnred in the capacitor4m )nrpp.r9fg ?

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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 wh/p xyboae+s760s++if:e5ff yb u7os gen it is connected to a 12.0-V battery. How much work was done in charging this p5eebao7fssub gx+y6y/i++s 7:o ff0capacitor?

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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((km uvr*yli( 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 plates of areanvek1he3- u7 n $1.5 \times 10^{-4} \; m^{2}$ 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 co u 1);wr djx02ce57sv ha;bh.xdsby9mnsists 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 ofaws): o,k 2rbvu4 q9rmchz5 n* 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 pla)1 -nvdzoah+u 0rgwa8te 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 capacit- 6d,aoq,t3bxrmgc +m or 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 charg ,zsnppm) pe6,lsr9rezw44 i9ed. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserterz ,np sple wps)9 i944re6zm,d. 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 charged. u5a5l g2mpukn (4 7pzk The battery is removed and a slab of dielectric that completely fills the spacm5zu p7kp4l ag (un2k5e 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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