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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 no;t iv+gr zz3 dz o+sd30+4q,rv7ulaimt 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 z* ukzc*h -vp7ae3ay5 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 w eo9y)7 5rgigfrom their surroundings. Object A has a net charge of excesiw 7ggor)95y es 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 oxq8oik d6d5k dww 80,af 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 movingi 61q.o6naxp yrv2up 0 in a direction 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 conn ujdqg5;s3 52 z -,.ieqw nksfu*opi/ducting 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 by a 500 V potentialu 5zyt41h)hq wc(r,xe difference. If the potential difference is changed to 2000 V, why r)1exhw(z,th5c4qu at 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 pois;pk0u,.+gupn0m 1gdb,fc vv nts are at the same 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 p/va7ubkp cfm ,,v1+xcou (,mfoint B along an equipotential surface.o1 ,c v abm+,/vuu(xmc7kfp,f

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface pa(c 0ebh1tw0 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 tooz- +perp96*6 tvcf go that on the electron as a result of moving through a potential difference of one volt is ref6p6e*fg9o-c+ v r zpoterred 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 a12huf:s9.ha)qhimlm+ e9a x hzm x,6i 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 correspo,b7wgobf g x6 l/ae0(pnds 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 w18ycmrcp )dq*c qh-q5q i6b. of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point qmqp) h1c*q.qdcb-i yr w8 c65charge?

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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 neg:rgepah:jixz6i zx e;3/5t0 bative point charge is -100 V. Whatx6;aptzh : ib /exg3jze 0:5ir is the absolute 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 aqs6sm0n 0ek(bm hvqyj,*6zw,5f nc-e 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 also filled with a charge ofyk(*whbm qmz-j5 ssce6n , 0vnfqe60, +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 thl63vify q*g: a;km sn8e center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What 8ayvi3klm* s;n :g6 qfis 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 th bekz z1l*3o2nat 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 a15d,cvyrf h,)m 8in zd

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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 one oby q a qzuu,.x3ig3fvc1 a./)tf7q h9has twice the plate area of the other. If the smaller capacitor has capacitance C, the lar3 gvc, zat3i 7 q)ouxb q.fa9.q/y1hfuger 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 o7 de)cwbvpl8 *f C. If the area of the plates is doubled and the distancebe7)pc8 dwl *v 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 kgni)cs4f6 g2 capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected,gsf26nkcg 4 i) 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 gio4g1f0z 4 t td (az 1t,yuqrjuj0t76tjven capacitor is weakened, the capacitance of that ca t0r4aj10gfy7ju z4t1ojtz dt q6 ,(utpacitor

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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 constant voltq80 qxcb;p,ccpeef+82y ab0ph,y ox.age by a battery as they are pulled apart. During this process,apy.,2e+ o0xh80cfx ecbq;qbyp 8pc, 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 parall,x;nsf2hu lp2 el-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the elecpnhs;ux2 f2,ltric 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 dielei3q-j 4phq d9xctric material between the plates of a capaci394 hdjp- qixqtor.
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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 placi. sgb5+ gn0d:o p,fiued between the plates of a capacitor. What happen: sgnif. 50pob,di+ gus 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 such as paper is placed between the plates of a capaciipnoe ,2f0e h nw;qk4ovr/+6k pe(7nator holding a fixed charge. Wh7hpwn/ 2ka(vp; f,eo6+ nni er0ek o4qat 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 con7kl( wmp b9) ;fg-aee6q) sw7i-tgys5 v jdzd4nected 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. ;swqs-pg7 ()4gw 7z6 tikafv5 e-jly9)ed dmbThe 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 c miys f,2:(beof a capacitor holding a constant charge causes the energy stored in that csiy2, b(m e:fcapacitor 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 thel,0t 9g)fnpqin,i 8vs energy stored in that capacitor qn) ,0,stg 9ilv pi8nfto

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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 xw(x ie5o11jgC of charge from point A to point B. What is the potential difference betweex1x(ejg5iw o1 n 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 fro d nvgqon71x.h2 3mtz;m point A, where the potential is -50 V, to point B, where thet1qz 2;n.3dv7ngh xom 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 pj;+*v()on f:bpd sgyi otential difference of 500 V. What is the kinetic energy of theygid( )f :n +obs;jv*p 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 electric po-oo:- .ea,os ags kv2).ofrca m(i+ gmtential difference of 500 V. What so2g oacv -)a+ ok (rf,:oi-em.gsm.ais 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 f is4+l 0*f(i t7gm-anjmc itw2alls through a potential difference of 1200 V. What speed does it agt0i(j2ta7ii 4- wml+*cnfsmcquire?

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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 movinxhfn x5l8s,t1g $8.5 \times 10^{18} \; electrons$?

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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 500 v9qby3z6 :km/8 wia axV. What wbk8x vam /:z6y a9qi3is the velocity 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 ag3e 1 wifk92qwa obh-b:/i9:j (momjp charge of 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball isjp(mqiw3: ji1hg /-koebb99w:2ofm a 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 between tkyu6y9 a)+sfdv h 0s0ba3 2gkmwo parallel metal plates separated by 1.0 mm. What is them 9 das2b0vhfyy60+3) s ukagk 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 magnitul /zvd6nvdq vdzp,7w2 4f- ;jkde of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, whawvf/ zqzdv ,v - 4dnj;d76lp2kt 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 50p0-(w, eqov9ywbwt .*: oklq u N/C directed toward the east. If the voltage measured relative to g( .p0wwt:*q o9 qb loyk,-wevuround 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 of an electric field of magnijj f7+asvh6j*ryb*x 37)bkje tude 3.0 V/m. What is the change in kinetic energy of the proton+jb fskjr 37jb*6j) yv7* eaxh?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, s fzl4ez (:)dfyd5rf +weparated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negawfe( d+l:fzrf)5dzy4tive 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 by 0.20 m, are connected to a 12-V battery.zxlqo8x)dy 90o 6x rj6 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 positivexoqyx 86lo06j zx9) dr 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 0.20omubv 2b uw6h096h g 4tz8thp- m, are connected to a 12-V battery. An elbph uttvzo60h9wm gb42u6h - 8ectron 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 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+gbvbcoyqpp.c)5;)v of 50 N/C directed toward the east. If the voltage measured relative to ground cg. p;)qv 5pb+v)cyobat 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 directed toward the east. If th+e: fkt dhua;(e voltage measured relative to ground at a given point in the field is 80 V, what it (fea: dhuk;+s 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 difyy:*0o3 z2oypff8 fk bference of 12 V, it will acquire a kinetic fof2b8z30ofy pky * y:energy (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 dt op0 ii.zw74ib6ic9of $5.0 \times 10^{-10} \; m$ 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 mete47j qqu nnon+ xq1lii03tj)o.r stick. Find the electrical potential for the center of the menjlq+.1o )ntu4 nq3j70qoixiter 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 charge is at (3.0 +n5tp8lzxlf25u ht9 l7r: n him, 0). If the potential is takenh58htr7txi5 fl2lln zn pu:+9 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, 0cita9wd)wit6kgu ( +u*wf z6* ) 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 energy of a 1.0-nC charu g9 tcz wu* ii*at)ww6+f(dk6ge 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 the xd mjeo*0f-mh99i7x spotential is taken to be zero-f09m9m* ij7s xdxohe 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-a noz0c.jjd kjp(+ 0g charge +q are placed at the corners of a rectangle of sides a and b. What is the potential at the cente0-o+jjjd g(z pckna.0 r 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. Charges of +4.0 mC a1f6k7 ds80f qyl6jua 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 absoluted 1f8l 6asu0yfqa6kj7 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 (cha b:8mtz( 0gitorge +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 necn a.*/mtc6 rfzessary to place three charges, each of 2.0 mC, at the corners of an 6 .nczt ra/m*fequilateral 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 plate9ty i ns/q8-p1nh7to bs of a 2.0-mF capacitor when it is charged to 100 p8 tob- s9t1/y hn7qniV?

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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 )*dmrjaynyf)2 / /m/uqt uyg, zxqv 5pyo3n10 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 capacit- o-t 68mpxuvjor is filled with air, and the plates are separated by 0.050 mm. If the capacitance is txvpj8u6om-- 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 plates of are ko 9m-j0quwz9a $0.20 \; m^{2}$ 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 :t;ekagk sfm 163qpy )cm. If the potential difference between the plates ayse)t;3fp6qk kgm:1 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-:en )qom 5mj5lV battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional chajq 5moen m:l)5rge 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 ca y24 c0n4w1gsh:vjineagx)f4pacitor. How much energy is stored in tjgei01 aw n4xnc)42hg4yf sv: he 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 acrossm2i7lvqc4/ rw 4po*5pnbq ny: a 15 mF capacitor. What is the energy stored in the capacimyr4qn :2 i7p* wcln4o5vp/qbtor?

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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 platesm+ p.fnmr9u) w of a capacitor when it is connected to a 12.0-V battery. How much work .rfwp9 mun+m)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 charged so that 3 te).pcyua(z 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 arx .w1bbrso xx/7+tm.mea $1.5 \times 10^{-4} \; m^{2}$ 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 zl/o0fl.cz;vn( * j q7pn/xpkof 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 capacito u1 9-6yyjmkszc;bmv 0pp3:oa r 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 capacitor is constructed with pf(xm8 e50qjpp 9t/ms 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 arebw n6 ojn71,bja 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 tq2scd y3e ara a *dc)o/mlx7 1cfa/4hn0f8 yw2o a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completelya2e0yyqac 3c fh8s*1md2c f w/7x/aa4 lnrod) fills the space between the plates is 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 and becomes full6ci2x)j(ppp 7xk bm e9y charged. The battery is removed and a slab of dielectr7c9p6()xbep2kpm x jiic 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 the slab is inserted?

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