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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 5)pntl.qp5g;aol 4 dx is 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 a6gu .0i;a j(uk i0+u.cfw5d j ij,rfur

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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 theilx9sm3nyioy) y9 n+e;r surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher pote)symnie 9+ony9yl; 3x ntial?

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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 :u9fo;4qw yz rin the direction 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 eleca*mcr5we0ck;5wi-2* x md iob-. nwdgtric 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 placy-k*md90tfiz kl )e3l ed 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 ik xy 0hdtg5p59s accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speexd5 kht p9g5y0d 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 same potential is referred t7fuc;9r4;.q had,c w.ar himso 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 vgh7 s :5r7ihspoint B along an equipotential surface.h7gs5sv hr7i:

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfac lv.l) i nanulnreklbdr*n c) *4*4(a8e must 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 l: 70x-oq.f+t t qi3*a tupzumto that on the electron as a result of moving through a potential difference of o m+.i- q* :3af7upzq0xt totulne 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 uy7-fzmt9 ociyw2v1 f+ nit 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 corresponds2sdho bgi8xp 9g9 n mu)ye3*2g 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 dist2 axh+pg(6q7 giz5houance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away fg+hp 5q6x2gau z(io h7rom 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 j;+tu sqa e6l3r (.ihcdistance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point cs;itcql+h3(ej ru6a.harge?

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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 cs3 q2)cpqcxi*harge 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 chargq i3qcxc*s )p2e 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 i( c a:y,8vkudws 3.0 V when a charge of +Q is located at one of thw ducva( yk:,8e 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 alwa1fnubec a,)(vc nd +g4ys 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 xvnbt8qvn c+8 b)i3v8 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 rj2l i* r* uytltzi6ou l-nj,3,espect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has ca2ri -juz*,uj ,6t* 3lto nylilpacitance

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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 -gq1psndq s ,08 pso,wplates is doubled and the distance betw18qs0qgp, w od,nsps-een 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 pajxg63 uxqe u j:ip,70lfs2;lxrallel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnecte2qu0s6 f xx;x,llj3 ei7up:jgd, 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 plates of a given ca-bll p1sf- o.b k9uu-spacitor is weakened, the cak--plu ubs.o 1b-l9fspacitance 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-pla25yzjzfyg.kdczr/ 1ee.9xvb36i ,jvte capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of i3bdy92 j 65e.zf/kze,1j gxv rvyc .zcharge 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 withaxu qg32( 1 /- ckpx uf+ojnkxx5(-ek4a ok)hi constant voltage by a battery as they are pulled apart. What happens to the strengtu4x+ugknc-ajoak5)e(oq1 /-fpxkix 3 2x hk (h 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 f6e sma ux(7 h94qdqqp4or adding a dielectric material between the plates of a capacitor4q6x4eqp 7d(hsmqua9.
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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 c: f cmk+8ez5gxdz)g l/apacitor. What happens to the)gz zc8m/:gek+fd 5lx 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 :iqniye91xm6ml d 2myp;.*/ e rri nu,such as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between the plat*ylqmiymx,i6:en p219;e . mirnu d/r es?

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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 connectibyzvg o2ytn/-+ z-)ned to a battery and becomes fully charged. The capacitor is then disconnected, and the separation bettnv / 2y-ong)yz-i+zbween 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 constky b 9cn+1zfc)ant charge causes the energy stored in that capab) ycn+kf9cz1citor 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 stb n;vqy6j*a,o r(6mmb8zxsl .h/q( n *,uuwpvored in that capacitor touhnp/ymvv w6u( r bjqaom,ql. 6x n*;zb8*,(s

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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 energ, rd2:f6xqrd wy to move 10 C of charge from point A to point B. What is 2:r, w6xd rqfdthe 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, where the potentialrmz zn*ib: f)3r2gq/z is -50 V, to point B, where the potential is +50 Vzn2z qzr:gr*/) b imf3, 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 accelerate;-t j9jw3ma lfd through an electric potential difference of 500 V. What is the kinetic energy of the proto 3m;j9aljw t-fn?

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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 el:n9wrvaih 8 3oectric potential differena i8v9hwr3o:nce of 500 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 differencjsa3p(ohj 5fxa9 njm8+i+ug* e of 1200 V. What speed does it +*uj+ fj5 pnh9magi3(x8ao jsacquire?

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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 5cm,;to v*l8d jod7bs s *ut/lV 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 accelerated through a potential differgnw( epi )/yj7*b ps-hence of 500 V. What is the velocity ofbp/h7 *gpy-ji s( )enw 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 o d4u+ 4nc6q,3:txt gs5 bwtrgaccelerated from rest through a potential differe3w r,t xgt:d+ouc 6b54n q4sgtnce, 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 betw pfzczh)) obybjfyxug33+1f,r a b7-1een two parallel metal plates separated by 1.0 p)1 b3 +g oyby7r1fcazf-uzh3 x ),bjfmm. 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, is direct( kvg)a8mdjm ra3g( t/ed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the 3gr/mt)agmdj8a (v( kpotential 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 th/ 9u3hvq z+qye- +ynl(xkq1q we voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly west/-nqx9w ye(y+kvz3qql+hu 1 q 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 eofj,qtr ewzm3v678 +plectric field of magnitude 3.0 V/m. What is the 7z+, w6mje povr8qft3 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+xsdvcjhm e7p2m)n l )r1z)fw1 ml9h; 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 1s )1mvj7hh2e)lzw 9;c)fnm+rx mp ld 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, separateqxecy sv,;6e1 d 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 kinetic energy does the 1;xsey6, cve qelectron 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. Ante*e22g i3tfn 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 is the speed of the electron2*in g23t etfe?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform elz 6i;3e)skuhp2 uqsr2ectric field of 50 N/C directed toward the east. If the voltage measured relative to gs6 )k;ip3h s2zq2eu ruround 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/lky ;ssz 1n(1sav(2hb C directed toward the east. If the voltage measured rel( ks1yasbs 2(h z1n;vlative 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 12 V, it will ax54/vj)bg bup cquire a kinetic energbg bpx/jv 4)u5y (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 distan( 1yp y 7;:jlktz-tueoce 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 electricavy v9b *h18kahl potential for the center o1bh 9vvy ahk*8f 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, inc60geq d.e 0 ;v:zbn0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 0cz0edng6: vbn iqe; .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 charge is at (3.0 m, 0). If the potzj -fd,e.k3n;quvp 5j ential is taken to be zero at infinity, what is the electric pofe; ,kq j. nuvdp-z35jtential 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). I0 aw3/almwz w)f the potential is taken to be zero at infinity, what is the work re)amazwwwl0/3 quired 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 of a +za+*rd1j nsib e5p ;l0w3zhsrectangle of sides a and b. What is the potentiae ;sn3pd1+*+zisajh b0lw 5zrl at 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. Chh2i1gx8em1 l-fb sj t9arges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 jgtmh1sle1fx-b98 2i 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 +2e, mab6 m4h v e,2qliy+d,)pexa7 tp9n er7yss $6.64 \times 10^{-27} \; kg$) 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 of 2.0 mk39mw8wed1an dn v68:x egbx6C, at the corners of an equilateral trianglea6dn k xwx: eb1m838g dvw69ne 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-mFkzx;2e7f u(7e k n3ovi capacitor when it is charged to 100 V?7o ne327xe u(vz; ikkf

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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 areafh+4la/+zcor/:m u,c vbt * io $0.50 \; m^{2}$ 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 separated1cf6wjlmj: 0c by 0c jcfw 10:6jml.050 mm. If the 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 capacitor hasf+l 3-y4 qyjvs 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 separaatuss- 4-a)aqjrjj5 x,/p 9j7 z1nnsktion of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what iszkpr-4 n/u j -aqn, s9sjx jta1sa7j)5 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 ac (w 8pip,sg s84pkmpw,ross a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed 4pkp wips ,(8sw,g8mpin 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 capaci h8 /avxg/f+qdtor. How much energy is stored in /+/vxqh a8 dfgthe 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 u8ke6mqqm(by24pcpl8 d 6g enour*6.kl .1ob is the energy stored in the capaci ed1.k*k.ebp p6omll4yu(mq g 6nqo8r2u68 b ctor?

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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 connect5(pg zs4a q uo8(v9rv3id(w so,h p2zued to a 12.0-V battery. How much work was done in charging this capsqa(zps2go9hz(vr ( udp, iv5o34w8uacitor?

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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 charu7-bpgnf y05px*foeu3 y0)2lk oeg x .ged 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 corti(/ /q:5 h*6z nhfq f x-e;(7kt yyzbtoqo)tnsists 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 capv7,vm +8mclia acitor 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 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 cap8bbv )uetsd-00wps -k acitor 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 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 capacfn7x/3knny54 g+uv knitor 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*r .bpklmk sco8p k-0/ 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 becsu( 4 t rwt**zf7bzg/lomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates irgf(z* b47 z*ws/ ttlus 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 andba9 j0 -ra:yzx 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 0zy9a:a bjx-r after the slab is inserted?

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