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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 followiz0fkzf/)ft cu1 p*hf, grm.r:ng 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 am:a2uk)y2dgi 4ztiw ro451 qm

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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 d +dt -efifi-ny(/(dmsurroundings. Object A has a y(ef/m din(id -f-t +dnet charge 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 direc o::(yda cg u .nna4dgn:gdo4,tion 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 opposit o5m)7idggi 8te 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 sphere. Thbuufc19gb21t ey

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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 accelerate* +zduw2i .8qok/ylbj d from rest to a speed v by a 500 V potential difference. If the potential difference is changedyl+2*z/k.8wdou b jiq 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 same potentialcpyy1t6qz z0m -b19z b 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 point B along an equipo0 hifew3gp8g g8f(ujc03t+ xiqedz 0- tential surface.tie z+g-3x8fh wgg8 3pcj( iu0dqf0e0

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must b;9fz x u5 +ijhlh5wjt3m 3.cbhe

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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 ofz8hu.y7 a +dy:qu0i tn the electron as a result of moving through a pad8yyu ui.z+h7:q 0t fotential 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 un3tzmr l.jjq:7otb ( w3*r)cdbit 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 coiyf2-mql gg i):6vp9 -t/1j b u7rioxsrresponds 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 of 2.0 m from a positive point cha 5 wt;)wv-xugedb1-q arge is 100 V. What is the absolute potential 4.0 m g)dt1 ux-qvw5wabe ; -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 distan/2fb 7qdaf;;,jwp u ffce of 2.0 m from a negative point charge is -100 V. ,a/w ff2fdpj7qfb u;; What 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 ipv 0(a,1 jccfexact 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 potential at the square's center when each of the other corners is also filled with a charge ofi1 0(cpcjva ,f +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 3.0 V when a chargexy//-mukk p:va.q b+fpp / 6jev;j nb0 of +Q is located at one of the square's corners. What is the absolute potential at the squv/q k;j .ej+f/xppkvb p 0-u6:ab ynm/are'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 thqczf :ts7;x:9-f bjzlat 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 isn;jtzzuo+h4/ 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*m0u kz o8fhv:d 27p,.ukyku b2,tmb z are identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has cappmf2hodk.bu u kvyk, u70z t:m*b,z82acitance 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 ra90yz0, lj3encjz-mdw;b-ji pqp4 zo50*qjof C. If the area of the plates is doubled and the distance between the plates is prm lbc wijp4j q jy03,-eq*jz;- aon50z9zd 0halved, 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 rk)x;m ; 0,op vw; 5ba)silcuqparallel-plate capacitor fully and then is removed. The plates are immediately pulled apart)0qo bp5mi),;cukx v;swla; r . (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 plates of a given capacitxnc.b l4r w -3w1g4 (8t66r rp4zc*crunwovgm or is weakened, the capacitance of that cap 4w urbrcv-8gc xr co.*n(6 lg46mt 1wnwpr4z3acitor

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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-mhbn12 b ;x+9vy1whzpl )c3 aoplate capacitor are maintained with constant voltage by a battery as they are pulled apart y+ 1 bac1m39w;phoxnvbz)l2 h. 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 capacitf jpaa zy( 6u-5k-upa8nv87qfzn/ k-l or are maintained with constant voltage by a battery as they are pulled apart. What ha l/(q z58nup7anva -kzkaypj-f- 86ufppens 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 dielectric material between the pla lpg t1+ jz4 c q,bfc487p+fickwfoa5b7p8 6untes of a capacic4k ++8cb lb c1wifgf,pq77jnaop 84p6z ut 5ftor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric materiacu5scai :h0(rl such as paper is placed between the plates of a capacitor. Wh:i 0 ch5su(carat 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 such as paper is placed between the plates of)6r0f czdu 9 hfp72vufppdf *9 a capacitor holding a fixed charge. What happe pd fzpu r09f2*dffhv)cp679uns 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 connected to a battery and becomes f(7:cqy,4iime ,b drwpg x dj73ully charged. The capacitor is then disconnected, and the separation between the plates is increased in sucp (:d7ijq4mced,biyr,w 73xgh 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 holdp no(8u:nya(w pi-dr4ing a constant charge causes the energy stored in thu -non(pr :8(idwa4ypat 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 rt:d:6v v jkrgc zw+*1causes the energy stored in that capacitc +vjwrtr*:kg1vz d 6:or 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 char b7vbpa7-tgzou f:;n/ge from point A to point B. What is the potential difference between pointspv7z7n -b b/;:uof gat 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 9 :8cdbif d+sbng21t ct-lme6electron from point A, where the potential is -50 V, to point B, where the potential i8bbct+c s6d1gim92 - t:nledfs +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 throug 6auve;ox8xr6 h an electric potential difference of 500 V. What is the kinetic energy of the prvr xx668 ;uoeaoton?

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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 rep), 3s-7 *obnz qldzjfst, is accelerated through an electric potential difference of 500 V. What is the spe-b7qls j*zz 3fo ),npded 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 pqb4dmv hfnjfl/ 49+:hh/s*ea potential difference of 1200 V. What speed does it acqui*h/phjm+l:v 4ndqb4h e fsf/9re?

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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 8xkff 2 j-b 7x;fav7pu$8.5 \times 10^{18} \; electrons$?

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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 throughzp1f3065b)k ahz y:phat (i tu a potential difference of 500 V. W bzup:a5apyh)(1 f th6k3i0zt hat is 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 a charge of 20 mC. The object is accelerated from rest uf24vykyvv2 57p y,spthrough a potential difference, and afte4v5yky 2yuvp,s2 pv 7frward 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 potenti3/5 wdnj /:)e5rw 5hkx lddhhqal difference between two parallel metal plates separated by 1.0 mm. What is the electric field between th xd/5r3nj :d hdh55lwk) /qwehe 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 magnitud5qyi ,a pcrg2(e of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0,cy rap( 2igq5 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 the pin*oj1n uk4 (es b2 yg-o/gd:1;gudtvoltage meu; j-s 2 *kdu/ (b4o:1n1ndgig ygopteasured 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 of an electric field of m (rzk 2z0.xt5 rtqhbyqk52y xfi *i2bw*12dsiagnitude 3.0 V/m. What is the change in kinetic en2rxbrq(2txd1k2hq i55z*0i*wz y2. yb tkis fergy 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 0.2ou2bf a0x/n ncdt. hh m4b.04z0 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 1.50 m from the positive plate, what is the hu42z bochn.x/4n0. 0b d tfmapotential 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 q;5 mvs+ nt3kc0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. Wh3 s;tcknv 5m+qen 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, see zw1zd09sk.eparated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m z0w 1z9eke. sdfrom 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 elr -o u/qmne--zectric field of 50 N/C directed toward the east. If the voltage measured relative to ground 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?-o r/n-e qmuz-

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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. Ir 2wm4a)e,amn :b.a puf the voltage measured 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?m a2.r,a p :u)wanbme4

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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 bixyhg +r 2ihpa1(z ,8acquire a kinetic energy (in the absence of fric b8z2gpii,rhyxa1+h( tion) 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 distaih5x.vw7faz/+ckzg z*- d f) once 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 k::8zalwqq/ot2(qe y a meter stick. Find the electrical potenyz qq8ae:wt2(: lqk/otial for the center 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, 6adk ,4cdjwn74.;4 raxq:6 jvjgccwk0) and a -2.0-nC charge is at (3.0 m, 0). If the potentiwrxjqnk7j 4 6.cakd:avjgcw 64;c d,4al is taken 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, 0) and-6ja:e c lwkmoaosw2yc:2,/ lh/lm.d a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, ylmawmlhw-a/s jl,ook :dc6:c2 . 2/e 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 (3.9b ox;j cs4vi)qzo8b+4oe d3q 0 m, 0). If the potential is taken to be zero at infinity, what is the work reqeq3osbij) ovc98+oq x zd44b ;uired 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 thez f8chk d wr59b2il*j5 corners of a rectangle of sides a a5c* zf8 i95h2kjbrdlwnd b. What 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 sidk 50t/(yhkw nfk+;gzhe. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed chargest( 5whyk+/ k;nkfh0zg 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 *6dh2r q3inl2l bn;ns+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 necessary to place three ch4s9ug tk2 (xjfarges, each of 2.0 mC, at the corners of anu k2 f(tsjgx49 equilateral 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 *;4m zs(5 itxzs5rioxwhen it is charged to 100 itzso5 s5 rxm*x(i;z4 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 haswhz1 +s 2hv)ev-rh/x *xxe-nj 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 wlu0;9 i2z(t;qeeh)nvh4vxa uith air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate a2t n l;i4zh;h)vqauu ve 90xe(rea?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate cap5 ,*fmbyr2n,ql4 uja fdt4chwfx 4p .,acitor has 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 separation of 5.0 cm. If the pote pf 9q :z.wl l+uukr+e5xiio90ntial difference between the plates is 2000 V, with the top plate+09 l: lfwz+ux.q9uki5r ioep 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 acr2s yv)x* yb g/1-qhi;joovgi6oss 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 connected during the ;xgs*/v1)j-yqbohi i gyov6 2 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 capacitor. How much energaou,jiw251 b3,w kyn zy is stored in the cb1k,zn jyiuw523, woaapacitor?

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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 sx 7;px+ng1(j*nv benwtored in the capac1jxv+x; gwpn*n b7en( itor?

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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 t+a-wp5vhm 0c connected to a 12.0-V battery. How much work was done i 5-vwm+c pah0tn 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 it stores tp- m(spf t gpccajmh1:6a1 09$2.0 \times 10^{-3} \; J$ 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 pla5mazz j5k 1kfduls-; 1be6z/ttes 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 capacito*8rc 7ylf2z8;g qsye gr 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 capacitor consists of plates o)60l dz )l3m1fcxfkto f 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 plw-xe3 3b 0v;avrusfd( ate 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 constr3ula2n p zpxr55sp(h;ucted 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 bgm (pg1u)i 8n4+t rofkattery 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 diel8g(f) rup gmki1to+4nectric 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 full5.gmjo51 d/r ;wpx tpry charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If t 1.5opg;xmprwjrd5 t/he 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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