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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 nmcaf+rijij,p j5v,oy5a 7w*0yh n t35ot 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 coulombsz4m5* 6mn/ sexcmu:j is 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 objectsbv3 woles.ii ,92oqxtd/ :zy2 are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher posbq o ewd2yl2o9/xz t,.3ivi:tential?

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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 fiel2vlb 95jcekx 7d

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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 directih(y/ s)9nb ;yqg.pqnz on opposite 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 spher+z xz14cgk .que. 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 tjv:ai ,y-xge(cx (x0a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the vcixyt:( g( ajxx -,0enew 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 same potential is referred to astj7+e(o)i3pllz*nh zc5hql sz e3( q9

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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 mov1r:erdz nv : a2bmo(f:ed from point A to point B along an equipotential surfacee orv1za:m(:f2 :ndbr .

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfae.a5.z /wuigy atj2e/ce 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 pa2cb p ar5uios r:qbx 2c4.9)znrticle carrying a charge equal to that on the electron as a result of moving through a potentiox b i.5 b:)r2zq2asn9p ccur4al 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 unituo6rz. l2o 5oiqs8jq / 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 corres fwe;v 4)ijdiw1zyv):m3q+dj ponds 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 distancu (:k m *zrilg1rvvx+1e of 2.0 m from a positive point charge is 100 V. What is the absolute po vx1:*ugv l(zrk m+r1itential 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 poq ik e7wm5.k:uint charge is -100 V. What is the absolute potent mke5k7:.iuq wial 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:ftasgjsmk)7h e ku+5b q)8l0 square 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 al l )sh8+)qeu:5b0ag tk7ksfjmso 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 83itscu :wv-/v81 zt1rn hn3toh ti3n 3.0 V when a charge of +Q is located at one of the square's corners. What is the antns/i h3othti- 8 nwu83cz3 1vr1vt: bsolute 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 tzru tbg)-x)(sf fbn r*2:20doo1ziu h hat 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 ij wji+ a.qs;5zufg jth5 e5x750 l0vkvs 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 ekm4 q:e 5,aj9r4pw :ua r2okwixcept that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacio2 pw kwriu4a:4e9 rk:,mq5 ajtance

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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 thequnc l4w-h1. tj ju9cyd2ef67 plates is doubled and the distance between the plates is hal n.2c16je qulc- dut7h9f4 jywved, 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 ft)vd/; s8v6 r5e dydjfully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) Wh6d5s8vr t/ vedydf)j;at 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 capacitwoezwtotf4 edku9b,b x-54/(:l-ap aor is weakened, the capa 5tx4aza(k pf-o w,te9be: w4o/dl ub-citance 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 capacitor are maintained with constj5.oqmief kthp: 6f7 9ant voltage by a battery as they ar:j.k7temp hi5o ff96qe 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 aa. g,frt atm(y3mxs:s iha1y.kiz 6( 8re maintained with constant voltage by a battery as they are pulled apart. What happens to the strength m.hia r(gsfs ,az.kyit:1 tx6(ym3a 8of 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 materex83ihq48u;x0 sni ul ial between the plates of a capacitoux;uxe0nl838iq4i s hr.
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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 capacitor.*21q fd xf/ lab1g0ejo What happens to the capfga/ eof 101* xlj2bqdacitance?

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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 capacito,/ p33yzbkzu a0tsl6b v)3uu pa8 9fuwr holding a f3up3fau/ z 9 l,z0bu)ypa8 wsbuk6tv3ixed 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 connecteb./xzqj2lct, zm 36oxd 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 energm 3j/tbco x2 lqz.,6zxy 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 chara-/w;ba6sr l r:zxl51k6tzdp2 i td6hge causes the energy std 5iz tsa1/dp66lxa2rz;wl rh- 6tb:kored 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 thy,nuawf7y4idsk v *t5n. h,2ne energy stored in that cav*uys5f,., hwkyn4itn a 27ndpacitor 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 poine 5.zk5by hy2pt B. What is the potentzyp55kbe 2.yhial 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 po6; en +mhf0hpotential is -50 V, to point B, +0 hfoep;6 hnmwhere 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 rest, is accelerated through an electric potentisd )p764xf1f 8ioq wzual difference of 500 V. What isi16 fows4uz)pd f 78qx 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 zq: /n st, bo1elb)u;qan electric potential difference of 500 V. What iq/; 1) noq stebl,:buzs 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 difference of 1 ffuyi.o- yg7n)l +q;a200 V. What spe -lu f).n+oiq f7;yagyed 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 9krb s9 ;ut c1jqah,2c2.0 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 electron is accelerated through a pooew6e+d47w 7vj v(;ol uiekv 1tential difference of 500 V. What is the velocity of the e 7(ewweije 1ku6lvdov 7v;4+olectron 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 ob ,dw9l:(cwzjyject is accelerated from rest thrdwwy: j,lc z9(ough a potential 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 difference betwdh0:j(cnkr-2d 9q utdyh,9qceen two parallel metal plates separated by 1.0 mm. What is cd 9h,k hj9r0(nqc2y: ddt-u qthe 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 directetlyu(rgw sa/4 3x: (sjd parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0w (syl/(jr :x43usg at 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 o(+pvramc+j gzep ,e. 4f 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 poiv (+g+pe.re mpzj4 ca,nt 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 of an electric fiwqy t6rx6 5eulk4 g8i9y4me:yeld of magnitude 3.0 V/m. What is the change in kinetic energy of th4w5q4k6t9 :ie mgy6lux8er yye 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 batterqts v mo2h+:n0y. An electron released from rest at a location 0.10 m from the negative plate.st: + h0mv2noq 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 by 0.20 m, are connected to a 12-V battery. An5kjbxrh nx x :)ud+).b electron released from rest at a )j5bx+h xnu:rk)b.xd 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)whw(//i+ cx ih cb+ja 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 is the speed of the electronh/ (c+ijiw c/a hbw+x)?

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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 the ed-;v)erx4no zsqll. k/ c. .jsast. If the voltage measured relative to ground at a given point in the field izkd4; n.v /re-lj q.socl xs.)s 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 directed toward the east. If the orjeuav.;s*3;jek. j voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.* . ;;jav.kseejjro 3u0 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 pop1m0 +i caq 3brf6js9hp, pa.jtential difference of 12 V, it will acquire a kinetic energy (in the absence abr6q fji j13mphp9 0+sa.,cpof 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 7u3ekctgicd88 h d(obun47 0 gof $5.0 \times 10^{-10} \; m$ 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 stic. .zdez6d9m uhk. Find the electrical potential for the center of the meter stimuz6e9d. zh.dck.

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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 (0r2 q.ob5a.vgjz2 xf g0, 0) 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, f2gjovx rg. qz50b2. a4.0 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 ao3ycxy eo2c lx3gl(t5rv/a02b0k s0nt (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at inky acloe0t y2sb00ovn53x(3gx2lr c/finity, 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 (lg j x-villfhlt7/h6*.i+ p( y3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to brix- jpt ylfi(hll+v l/6i *7hg.ng 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 placs1ee0v vy8-wted at the corners of a rectangle of sides a and b. t y1v0see -w8vWhat is the potential 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 c/8pvlhyyv,5vt- e.e side. 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 potent8yh- yep,vl. v5ct/evial 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,/o n/plu8cg8 m7gb08mt/adrk qgp 3i8 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, each of 2.0 mCcm 615 qdabdnrge710e , at the corners of an equilateral triangle of sidee 1 q5rdd6ec0 gmn1a7b 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 capaciq gp/o (hb9,nytor when it is charged to 100 V?y ,g(h9p/onbq

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capa6 f,nb e:g0ktjcitor has plates 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 rf 1vcx+ahz8 3air, and the plates are separated by 0.050 mm. If the capacitance x1raz3v8cf+ his 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 has rfq -)fmy3j o;z,w* dnplates 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 the potentin 4sf59ht:d dv dnr42(s+miikal dif:n5s(vr2d 4+4kfh i dtsim nd9ference between 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 across a 100-V battery. After the battery /d2vq pkt rfn:z)g/-lfully charges the -v knrt//lgq f2):d pzcapacitor, the capacitor is immersed in 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,.gr wghni4 k* placed on a 15 mF capacitor. How much energy is stored in the capacitoh,gg .kw*n4ri r?

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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 2m-q1l bo j)y oc/p(r8wlppe8*/kd bf a 15 mF capacitor. What is the energy stored in the capacitoo2bqop-brp(/*k l)d8j l1f cy8e w/mpr?

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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 conq;-n352knrfm+d bi ojj uj ,*znected to a 12.0-V battery. How much work was done in charging d i;j *3rzjbn, fo 25j-kmnu+qthis 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 s(wrrr4j-n:jy ual 0u -o 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 csjv(c62v0xr qchn6g dw- 1qy32o y 2ouonsists 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 area ccez+ b(u8:qlg6 q)gj $1.5 \times 10^{-4} \; m^{2}$ 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 opwgjnx;s yty05 2ai049 h 6a9vch0shof 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 capac 3zm2 ;v( (pato;bauwof md9*kitor 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 capacitovbor;l9/-s zh1alep u9 3b5z br 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 cha+kfifz7*rk d( rged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserte7fdfk*k+ (ri zd. 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 battem ()/ch7 bp6jr/;klcz3 pgw:ievp9hx ry and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates isme xw9;hpcp b/i/ )hl 7(k3r jpv6zc:g 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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