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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 i+8ogeyd *p) l ms,*inps not a 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 is a-7aev v*b 5hbb

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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 insulal* o9dos5 z1x8pe i5sqted from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which 5peso5o 8*ldx iq9 sz1object 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 the electric f itv10.gj kyqmo+ 24jg8ijkf 2ield

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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 oppo zve9d2sxo8kz)te 6+ pii,n1; xit)ob site 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 c6ukmr0koa. z k mqmo4s,r y().onducting 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)qxb6o.(p;pi .n4yrw pkwnz 6 v by a 500 V potential difference. If the potential difference is cxi)zwqn.wpp .4;(n y6kbp6 rohanged 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 so; (ptv7nkdzn6j 4 5nqame 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 point2s2 d 5b)njj1sr2a,rygbnw0x w pc 42t A to point B along an equipotential surfacy,js1n p2 s 2xrngcrbwaw)2b5t 42j0de.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mustux3vt500 pz tc,dq v5z 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 ony3ku oe6km ,e+vk22krg hz5 s( the electron as a result ,ysuv 6erhokk g2kzk(+5m2e3 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 isr/qa4338-coa7q wrlt( h ef+g -3p:imtkkjwa a 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 corresponds a76;e4a tlhx+t +yp jmto

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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 point charge i )l* ejb*s/bwe h.ine .;k/qmis 100 V. What is the absolute potential nikes//)jh.ewi *l mb. *;qbe 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 negative point charg5k*59i(spj)/ai igzw* n8acbaa zp :be is -100 V. What is the absolute potential 4.0 m ag/5( w)5nizai*b bpikzca8j a:p* 9asway 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 squar8vy4 xvwd; a1ee is 3.0 V when a charge of +Q is located at one of the square's cornwv4 1 8;dxaeyvers. 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 potentiagogh;( f/lpp gl(tr ,xi gpio2i5 ,a52l at the center of a square is 3.0 V when a charge of +Q is locatopflhglixg2(tp(,i2o; ,grg 5/ 5ap i ed at one of 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 always consist of two charges that aregd8pp ru q rv)t* n7saz*x(-cf)6 ksn,

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per volte ais(;26gi+ zxg+-h /wsw fo dqh,ul( 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 respect except that nnua,*arao.- one has tw,*r uaa.nn a-oice 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 pyi mktt6 q(js 9u91*ma capacitance of C. If the area of the plates is doubled and the distance betwj 6ktmuy 9ps*mt(1iq 9een 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 fullz)(bw5au* ipu y and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the pot5ua )* zpwi(buential 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 capacitor is weakened, x-0o gj4oy xgzj. (ph:the capacitance of that capacito4jygox (x -0oh .:jpzgr

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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 ia;ef. 4imp(x are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plaeipm.4if a;x (tes 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 capacito sc30i1 ke v1 +;t,nn2exaafc4o g2xyer are maintained with constant voltage by a battery as they are pulled apart. What happens to the strenxae1 ex+0an2 fgyc1 okv,t ic sen;432gth 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 plates of a cknxg)(vmm/. p apacik pmn(gv)./m xtor.
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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 l.2 vv*p97 hwtm iy0zpplaced between the plates of a capacitor. What*vwp 0pytmv.z 97h2il happens to the 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 su he+xajf+n; /ych as paper is placed between the plates of a capacitor holding a fixj +fe+a/hn; yxed 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 capacitor is connectelek uy m1rn-k7o-8m9qd to a battery and becomes fully charged. The 8eqlm7- my9 o -urnk1kcapacitor 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 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 char7b fkt9,om)sd ,;qcyoge causes the energ, ytcd;sf,q ookm79) by 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 given capacitor causes the energy sbem+b .1esy :j9bpta /tored in that capa.1/bysjta+bm b:e9 ep citor 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 hr3urt 8 8zjr810 C of charge from point A to point B. What is the potential difference between points A an 83ujz h8tr8rrd 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 movingrb 1qor)x ;;ani6lw3gz5zj 1l an electron from point A, where the potential is -50 V, 3 azgi ql;rojr);b6 w5 1znl1xto 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 meap)fo) ;z rgmv1 5f0rest, is accelerated through an electric potential difference of 500 V. What is thzfeofm m 1vargp0); 5)e 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 accelerat)nvbp4 u7fc -iiczfw f s+/7o6ed through an electric potential difference of 500 V. What isfcbu n7cosz7f+i p 4v)-/fi 6w 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 otthg 59s+:mj difference of 1200 V. What speed does it acqso tm+9:jgth5uire?

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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 ns/8i tc1vv7i V 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 electronc. j qq*;ngpk+ is accelerated through a potential difference of 500 V. What is the velocity of the electronk qq. +*cpg;jn 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 /g5 svgcj/sz9v p9mbo8 l-ow *a charge of 20 mC. The object is accelerated from rest through a potentiap/9 gjoo5lwv/cb8 s9zs -mvg*l difference, 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 diff 4,spi8d:x ms5 fh8xfuerence between two parallel metal plates separated by 1.0 mm. What, m5dx4sx su8hpf:i8f 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 fieldbl (mj l:gyh 39w8,nay, with a magnitude of 500 V/m, is directed parallel to the +x(h gn9ybm:w jl,yal 38 axis. 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 fiel/s(bnhyw4 e(nd of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point /hbe( (wyns4n1.0 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 m lkm 0iy7 y gaf,6rzwc;l4u+1field of magnitude 3.0 y,;rful 01my4z 7c+ kiwalm6g V/m. What 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, are connected to a 12-V batt;n4f7- ua 6k*dad wescery. An electron released from rest at a location 0.10 m from the negative plate. When the electron d6w;7 uda4a-fseckn* 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, r2unsn wrj 08-c*h)yyseparated 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. When the electron arrives at a distance 0.050 m from the positive plate, how much kinun wyy2hrj0 n-)rcs* 8etic 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 w 2j*j7gawgw.pd) u0mm, x2 sqby 0.20 m, are connected to a 12-V battery. An electron relea ggm.amjwux2*wsd,w7q2j 0p )sed 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 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 di 7rgdd44;eihwa .vgv0 rected toward the east. If the voltage measured relative to ground at a given point in th7d0ig;v 4d.gawrv 4 ehe 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 +46 d(rpjhonx ,/*/vcmci gy o.c,gpo 50 N/C directed toward the east. If the voltage measured r4 mp.n,g(yrj covd,/+ihco / o6*cxgpelative 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 obheo s5iy: z+4f 12 V, it will acquire a kinetic energy (ini e4:ohbs5yz+ 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 atg fk 138p w1b4u 6ykk2c2;(ctymswp ic 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 of5cldnm/ot0 tj)cp+ /n 4 w/gqh a meter stick. Find the electrical potential for the cente tntnpjhowdlc/ 0)/q 5c4mg /+r 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 -2.0-nC chaid17z qgqzsch yk0b:79 a. y3wrge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric phkbs9 azyqz7 :03ic 7w.1gdyqotential 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-nCzt-u0y1nr:w a charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, whatauw- nyzr0: t1 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, 0w(l h7vl g;hhhl: e-v(). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to point (0 :h(hh-g7 el; llwv(vh, 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 orhdu k,x.73o ff a rectangle of sides a and b. What is the potential at the center of the rectangl7.u ro3dfxhk,e 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 sidefogax-x, (l. j. Charges of +4.0 mC are 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 potentialxf,x gajo .-(l 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 +2e, :qi3 tzioae u) 7qzs04mass $6.64 \times 10^{-27} \; kg$) 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, each o pafph 2vg.68gf 2.0 mC, at the corners of an eg .vpp286gaf hquilateral 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 8qu t5;bh73w kzgb xfd2tk1,b it is charged to 1008bgu bh,z125t ;d73ktqx bwkf 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 jf39, gxm.z9 zk :s9xy9 j 9ibhy.jxygplates 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 airg ib;y (lzhgaxloz**u3*2 .lzle3 m6e , and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the ;* ulym3b*l(z2loigza6. ez3gx* elh 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 areac 38rks.fd9aovxr*/ q $0.20 \; m^{2}$ 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. i;pur: rb- er(yh4 df0If the potential difference betwifp4:ur;ehd0r y(rb- een the plates 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 acro t+sgk pmf30mv1c4+uess a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformem pgsck31met 0+u4+fv r 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 pl1 hwyayds2n jw:52b y)aced on a 15 mF capacitor. How much energy is stored in the5yw)a n 1w2 2dybshy:j 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 mo0xxqcj ;f(n c.m0zmn nr4)+rF capacitor. What is the energy stored in the capacimm ; cj00xc.f+qo znx( 4nrnr)tor?

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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 j1s(, gj+xxhwn*jpnqcxo46:when it is connected to a 12.0-V battery. How much work was done in chargnx +j*c qp4 (:wxsn jx6hojg1,ing 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 p40 ju +hqvo 4gam*mu:$2.0 \times 10^{-3} \; J$ 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 consa )jx 7:r;ipqjh5yuy0ists 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) e nczy93sph/ 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 areal;0l v.g6 rmm h53 2hbmoschq6 $1.5 \times 10^{-4} \; m^{2}$ 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 constrhrr+ow:lrm)2 ew38 0h ql:+cnhv )i5gu ;luanucted 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 9ns. uoxp5e258u4nj blzzuv0 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 505 s2n+bn pdzv47)s0f twp*q wo-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 isodzp2 nbw4n s7w*)t+f0p qvs5 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 connecu15ose,(3 hj z3tig*w/bupet ted 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 pl5se z h w(o1,u jb/i3pe*ut3tgates after the slab is inserted?

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