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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 qwu0ap.c /olsyk r1zqe*q7p g+7o7: fnot 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 2lexwon v;pe(. 69r9k4s ,ppxac d:dusgw90his 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 from their surrobbp)eo(uu*-wlmt46sx/ q4s m undings. Object A has a net charge of excess electrons. Object B is groundeum-/ wos (ql6ex4 4sbp tm)b*ud. 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 of the r9o4bi t.p,zcelectric 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 thy7,yo ku5djx y45ph2h e 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 pyd /pfrzqe tkz +8l/,0yf;x2placed 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 is accelerated from raeph* qf8 kh9. n+bx71pzn:2 (srnq gvest to a speed v by a 500 V potential difference. If the potential fpz12(eqa*hrxqs8nn7h kn+b:vpg. 9 difference is changed 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 potentialpd9sq)3b v(jah2+ jwao; t lx, 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 Ayef* /p69e bxnsoe+v4 to point B along an equipotential surface6fbxy*e4s9 o/ vn+e pe.

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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 b3e2xjqx* o3jc l)k.hqe

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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 gi/tm..nvhp oqd+*l u ,ai -8kcharge equal to that on the electron as a resulto+.q 8t nh/d.l ikma-*pgi,uv 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 is a uni97mcpu7 x+b7ronhmp8t 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 correyru wd705ot(g sponds 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 char57tqoh pizme 6d3 p(r0 hlym:nu1m)h1;tc 5pege is 100 V. What is the absolute potential 4.0 m away cq ;hp p(mheo37:le tmzrhtu 1y)15i065 mnpdfrom 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 nek bci11-yxuj 3gative point charge is -100 V. What is the absolute potential 4.0 m away from thu1yik13 j -cxbe 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 m(i3 jus/k7g wa 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 centeswm3 7 ug/j(ikr 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 potential aiu: kol;:tuv5c m c -,3ysmte.t the center of a square is 3.0 V when a charge of +Q is located at one :.3y 5o,c ;stciv:u tummel-k 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 charges7uz jioiu 28m+m/c k7c 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 ikypwcng1au.1 :q5 o ug2*zwb3s 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 exit5 y7r:y a.ajcept that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger 7: tjr. 5ayyaione 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 ca0/pl 4 vx:xqxep:es 1epacitance of C. If the area of the plates is dvqxe41: e p/0e:slxpx oubled and the distance 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-plat;h5 7synugde r5a9-uxe capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery diduanx5;gr5hy- 7esu 9sconnected, 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 pla)o ie1gyjzb l1jrd*26rdc6 *xtes of a given capacitor is weakened, the capardyxld* r6jo j6i*z) 2 gcb1e1citance 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 constant voltag+ku * 06pbes)j fkx n:4 ij7kvkff8v4ve by a battery as they are pulled apart. During this p4fve4 vf7+0 kkibn kvpxf*j8u j6 s:)krocess, 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 o2w2( (en.ortv .tc mmcapacitor are maintained with constant voltage by a battery as they are pute o2(.n.wo(2c mtmrv lled apart. What happens 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 2k/x* p dfsyl u12o(,m1xieak a dielectric material between the plates of a capaciam1k/f*( oix s2 ey2 u,x1pldktor.
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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 betweekqlue/;ofs94ll;b g, 0 t hbh6n the plates of a capacitor. W9ul b04lt qe6f/,ogls;hh; kbhat 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 t+)(mo we 44hp rvnm+lwhe plates of a capacitor holding a fixed charge. What happens to the ele4n4h ol wm+mw)+pre(v ctric 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 uxxx07rv f:ol6 rl9j8p i26wbbecomes fully charged. The capacitor is then disconnected, and thb7 2ixp 8:0l6rwxfjovrx lu96 e 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 consta 3da8*qcetqrp.bm 1( jnt charge causes the energy stored in that capacitor qa*8dqtj(3r . mc1 pebto

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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 (c -vwu xk)l)h19hxxmstored in that capacilhcw x -91x()vh kuxm)tor 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 movg:x3jal 20rixifg *8xe 10 C of charge from point A to point B. What is the x f gi0rxg3:jl2ia 8x*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 2l770 ar/we hplzj;)bgppi 0-au vfw,electron from point A, where the potential is -50 Vf / 07lbga) iluj0wepapw-2vzr;ph ,7, to 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 rest, is accelerated through an electric potential d/xfif+n:s 1pw 7x o2r21mwv nxifference of 500 V. What is the kinetic energy of then x:+rs xmw x7vp/f2nif21o1w 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 reyl3 t7dp n1w1ost, is accelerated through an electric potential difference of 500 V. What is the splto7 113pdn wyeed 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, ai ;du+wcbz33 :*gwdee proton falls through a potential difference of 1200 V. What speed does it acquire?dzi3 + gcw*du3e;e:wb

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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 m-a t. q0o8clmrrob6 )g:)dqgc oving $8.5 \times 10^{18} \; electrons$?

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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 potendz2w1a,t c7row hhvg 8f5 5gs/tial difference of 500 V. What is the g8d5 5wza 21whg , ohf7cv/srtvelocity 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 chargb 9miu 8v0zbi-spc3b 7e of 20 mC. The object is accelerated from rest through a potenti83mcb i -vsbp9uzi0b7al 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 th(:rj ijusnpm7u m,-. se electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between t7 i- s(jmsjrm,np.:uuhe 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 directed parf9kds v*67t, 0mnp d)9yz xhgjallel to the +x axis. If thefdtm 7p9zxj 9vn 0 ,gydskh*)6 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 field of 50 N/C directed toward0nf;8k m 8 v0dq7 e.xovjla.qd the east. If the voltage measured relative to ground at a given point is 80 V,0o0q fv q8ek.dl jm8vnd7a .;x 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 dis-jrz)-x :j5;tso1 t l fr sn.6p/eabdrection of an electric field of magnitude 3.0 V/m. What is olz -jss b/djpr fxt: 51).r;esa6-ntthe 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 hb60 3vz*zg q rc5ae:j dcrq11to 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 potential difference between the initial and 1vzeh qd*1r5a 0r 3c6:gqzbcjfinal 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, qyji(,o2b l;:t peyk3separated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negatb2pj3(yq t;ok:eyi l, ive 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 12-V battery. An esp6bezl154r5rlj gs)lectron released from restbz5rgl1s r6j) ls5 4ep 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 directed towap/x.9ue r zk:rrd 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 poi erpr9u/z.k :xnt?

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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 bbdwtooj51/ :9 x9 dbtthe east. If the voltage measured relative to ground at a given point in the field is 80 Vxo9/b5b wo j9:btd1 dt, 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 acquire ailrod wo-ztc(c.;lqsd9w*te p ,i *(. kinetic energy (in the absenl9*;*w(t-,wdcsictrl dipq ( . z oo.ece 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 atd* .0 gjh b6:yqik:qni 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 of a meterp0w 4nsp ry(-d stick. Find the electrical potenti-yp0(rsp 4ndw al 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, 0) and a -2.0-nC chart (tjgk49;6wqi0 f dbtge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0,bf tki t6wd(jg0q;94t 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 char ur71q. ey+lxkge 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 chr.+ulx eq 1k7yarge 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; lga-02efesj (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge f;- ea2fsgjle0rom 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 cor9o9ihao)d3w 7zw( jpd ners of a rectangle of sides a and j9(a wzow7d9dih3 op) 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 k(djrftksyuf+/ )m+,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 potential in the square's centk/mf t+rku, (d+ )jysfer?

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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, mafa94 a hf.hr)1t)jsmmss $6.64 \times 10^{-27} \; kg$) 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 mC, at the cornja*0 r-unl 25 enpco3fh 84dtqers of an equilaterl 0nafe24on pr 5h-3c8d*uqj tal 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 4-.awdjr j7n 3rqky )qwhen it is charged to 100 Vy4nqrjdq-k3rj )a 7.w?

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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 lt6x gjl(g8h(jp9tr4 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 air, and the plates arezogcab0x gk-m:-a 2*qz0 0 ggu separated by 0.050 mm. - makzz b0g:g0-0ggxu o q2ca* 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 capacitortzne9c,y 3l9m::viy+zn ,pkp it. am, 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 pla0h*:dqc0cjz( qxt.n fte separation of 5.0 cm. If the potential difference between the plates is 2q0 (qc*: fdhzc.0jn xt000 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 +r wk9x5td2e +3halea fully charaelwe2 rk3h++a 5t d9xges 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 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 as4.wt0bt;n w q 15 mF capacitor. How much energy is stored in .;btsw40q twnthe 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 is the energy stored;k6g,jkn 0d2jqjv:zhp 1b 1em in the capacitorzkbj:jen pqv01g;2,1hj d6k m?

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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 o8y7ojpn,v*4 +mouyne nto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capacitor?oeoyy4u7 +8n pnv, mj*

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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 th(,5cc40*ht rhgzmnj eat 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 vl;fdt 2 0pkc.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 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 x 3)aelu,bha8area $1.5 \times 10^{-4} \; m^{2}$ 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 capac s/eu l4:;yu x4r-azauitor 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 plate area gp84vd8y77k vwpduz ls p,t) 2of $0.40 \; m^{2}$ 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 wj;gbe1*fes- ul/pq8 u mq.j m2ith 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 becom/ hcjs., v9yvxes 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 dielectrv y.xvsjh9c /,ic 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 tof cnkcx12,s;o/(s) c8)bwo +aga gnyw a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that complet1fgo)+anx, y) n w(s8boc wc2kcas/g ;ely 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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