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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 followic15xvylza y/-p,x *bwng 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 9e7.hprc 5ip0tbg,7 ss/1mi c*yfafais 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 thr 2 a5vku)o8wu;t7-ohv pogn (n8qch;eir surroundings. Object A has a net charge of excess electrons. Object B is grounde cv(nt ;ph58u8hrnw 2vk-7quoga) oo;d. 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 electric fp6:y e ydcd(o/ield

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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 dirw jbd9ck4j6aj8tya.; ection 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 o4 z* p1vju*nguvl.dg( n 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 rea ; )pbf;q 1c-zn;jieqst to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new aepqz)qn-1 ifjb;;c; 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 sq dt9h z+ s1m1ffbg;/b) roc3b * hpj3zz8cd/points 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 point pey* +uspk- *0gto1jdv9xap l5 +.fmtB along an equipotential surfac9xjt0p*+t-k gf+a5 u p*eyl.vdo m s1pe.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface m4xi9c m,*g v5s.nha tmust 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 carryin+kt 2k,g7ykog(msab 5 oa 5o8vg a charge equal to that on the electron as a result of moving through a potential difference of one volt is 5 (k75b+t gokgoa k,asmv82 yoreferred 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 9 s 7b( a1/k)r:mmkfcp8dnxqxqzf)-pa 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 corresponds0(r+oah fe(87akf cml 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/dsp/0+i yd : ogyskb. a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the +i/:k0dsyb / p ys.dogsame 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 (k y7ctk+akn7rdp 9o: at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute po(pyoakdk+n 7:9 kc7r ttential 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 thl( o96gu)i fyfe exact 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 poteugi 6(l)9yoff ntial at the square's center 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 at the center of a square is 3.0 V when a charge of +Q ij .b 9ze-7izr .v(* trpylf-ovs located at one of the square's corners. What is the absolute potential at the squoet.*vjrf79z-l vi b.r -zp(y 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 oopw/ f1l05bto5/b qzgf 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 sxq+r.n zzc i-u8zg64is 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 except that one hie(asip 8xbg*up d+4 vhz62l:as twice the plate area of the odl:uxgph2ip8aie(6+vz b s*4 ther. If the smaller capacitor has capacitance 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 hh-.c86xph :ys 2 bxaqbas a capacitance of C. If the area of the plates is -csh.26xhqy:p8abx bdoubled 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-plate capacito5zk 67n zp.55v x,bqt btghu3pr fully and then is removed. The plates are im57ugx phv3 z ,znbq55bk. p6ttmediately pulled apart. (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 capacitor is weakened, thxzsu93s 1uie 8e capacitance of e9i xszs8uu13 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 parall9l oj:gl ycp/ dg )*b03uuku5zel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge o0z j3*dy5u)b gpkucg/9uol: ln 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-f p3n 0q6lreux p+v)i-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the ele 0nrif3pp vq-+6)ulex ctric 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 /.j5qz1vpy )+ilx9l jrezz*uthe plates of a capaijze+ v15zx)uyz/ql* j.p9 l rcitor.
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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 pape jrre 26yvf,b* rhwi()r is placed between the plates of a capacitor. Whhe2,r rfv )(b r*wyj6iat 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 pa 8xart qh)24 oyc+(ijiper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric fie qy(ahco4iri+8tx )2 jld 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 cappjbp 5wntyl8 xavff(gus5 2- p),qb/1acitor is connected 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 energy stored in t1snt( yp5 puq8f/ p)5fl xbw- jv,g2abhis 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 m3 hbow y1nuasfq:-og w./d-: holding a constant charge causes the energy stored in that capaciag/1b omhfdyq3.w:no- :u-sw tor 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 capacitms0wzffok :k d)tqrt81me4 ,/or causes the energy stored in that capacif1z /m ekf8:4,wtko0r d)t mqstor 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 point4owqh+q pnd +- B. What is the potential difference between dnwh o4qp +q-+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 poi+5d96 02b)bwyovdl xuomv0 mqnt A, where the potential is -50 V, to point B, wheb+ 0o 9y6x 5vwd)m l2v0bmuqdore 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 ac; -n1 . fa+auo5a3wmagpvo945nbudficelerated through an electric potential difference of 500 V. What is the kinetic energaf 35a4aomdg n;nuow -b ip1af5u+9v.y 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,go)m *m tx1ms-qz vj:0 is accelerated through an electric potential difference of 50vm oj:qz0 xgt m-s*1)m0 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 througg h5nr,kg+ ho4h a potential difference of 1200 V. Whahn5rk4 ,hgo+ gt speed 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 9.0 V do in moving -0v zloax72 ix$8.5 \times 10^{18} \; electrons$?

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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 08.l0x,uy 0yco mmmwa through a potential difference of 500 V. What is the velocity of the elec8 xocam0m0l.m,y 0uyw tron 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 accelerauvz ao0g)f-1g2iy8cx ted from rest through a potential differencoag 8-)iyfvgc20x zu1e, 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 potenro jgx m228 bdgn,l82n3 zads4 jjr1l4tial difference between two parallel metal plates separated by 1.0 mm. W2z482glo ngdnj4ra1j, lsx3 8dm r 2bjhat 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 directed parallel to t;)i4p4 x b,dc3 1ctf0gvrfgac.e s vm3he +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential bx,rae cd1cff gp 33c;0 i4g4vvms.)tat 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. Ix ko;wz+0i:np f the voltage measured relative to gok+wznx:0ip; round 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 a.qz9c6lxx + mpemyc:+n electric field of magnitude 3.0 V/m. What z+ px9qmc :cle.x+m6 yis the 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 to a 12- p2qu2() bpbkmV battery. An electron released from rest at a location 0.10 m froum b( qpkb2p)2m 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 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 lzpy-*xq1c ,d8 7nv( idku eu1connected 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 ee8i1zy * u1kdc(xq p,d7 uvnl-lectron 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 j56xpih6ik-ok -nicp o081n/az r7dlbattery. An electron i1 - 6ozio 7/5x0c6d khp-ijknal8 rnpreleased 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 of 50 N/C directed toward4zj ncm5 0 pu jeh1;07on6bsgmg8 (xp9j +negk the east. If the voltage measured res+hugm1j6j;gm(n 0oe5ep 4g7zpn njb xck 980lative 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?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electricpv/z: .r9a d.wqnu:38etvhb h 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 vd8ur/ e t9:pb.n:qzh.3 vwhaa 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 nev:. c(6*outt srss6 V, it will acquire a kinetic energy (in the absence of frictiot:s6noretsu6. * (scvn) 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 oz6d3 pnbf)b 25 vvcjpq;6e 7rdistance 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 at2v v;g87jpd9czfsh1o upi*8w the ends of a meter stick. Find the electrical potential for the centou89czsv 2 *v;w7p fdgjh 18iper 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 charge is ae2o f 2siws ;h:e.q.jkaws,- ft (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric poten2 h2owekws:f.- qsf j ea.i,;stial 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 a -2.0-nCl7 7e e. d3jigot,t /1no/m.m)vvej7a zyfmc) 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 charge at point (0, 4.0 .notav)7).eme mvltcy,e1fgz /ojj3i d7 m7/ 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). p/3jzd b .bjdun41y)sg,h i .l/bg a;eIf the poteb/.i;gu/1jhz3dsn 4 a)gdb j.bp, e lyntial is taken to be zero 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 charge +q are placed at the corners of a rn:) op ev,cl*c xir,w8ectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a) own:c ,lrxc,*i8e vp = 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 are placed in two diagci olt7k 2-vw0c,y2bi8rfj0 p onally opposite corners. In the other two corners0 r7pl- ibicv80y2 jwcf,kt2o are placed charges 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 +2e, f l+jgcd5k) +xmass $6.64 \times 10^{-27} \; kg$) 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, absmf. (mq1xm 99bw6g gt the corners of an equilateral triangle of side 2..wq6fgs bbgmm (9m1x9 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 when it is chr da u6/ /u,j s(p:b(5fsocn2wbwpvm0arged to 100 V?/ pp( wdvfu0/rbj(2 6ouscb nas,w 5:m

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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 platedu nlfp)d k(ri1, r1s;6d ns3gs 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 aruxjs y ,j)t)c 4 8-xbr09edhpqe separated by 0.050 mm. If the capac)xc4 )q8-,9srp hxjueyj d0t bitance 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 ha-4 oivl;/z r-(yiu t(o;dtxki y6 /rgos 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 ty:ui/w4tj; hje8w ,9caydj-e he potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between the plates?e/uyewjhaj 48: tyjc 9,- id;w

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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 b,r bpp)-reuaa+ /h jlm4l1*qcattery fully charges the capacitor, the capacitor is immersed in transforml b/),u*+1qjp lr- capa4m hreer 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 capacito hhg+q y+)l1nmyz,g 7nr. How much energy is stored in the capacn,h ly g1hq+z7+gm yn)itor?

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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.m1blg04y, fh4 b*rbu+pgsp* j What is the energy stored in the capacitby+ *pfl 4 gg41sup* r,b0bjhmor?

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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 ja l up.f3*dequ- q/-tis connected to a 12.0-V battery. How much work was done in charging this capa/t. f j*q aupu3--leqdcitor?

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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 chaur8 *ap;i gr s/imu-9uwrq +4yrged 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 consists yi9-sbv -j.mg;*ipidof 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 capacitoahfq isi1.9-z 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 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 of3-q/iask rxnx(z54gs 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 ofxzkda (- nx+9l:,kcqia5 .gsq $0.40 \; m^{2}$ 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 constructezwm0a)epv qun dc.i)mo qu*k6/ t9o 5/d 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+f(x2im6rcqk: spsn gq03f0j -V battery 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 dielectric has a dielectric constant of 5.0, what is the capacitance of the capacitor after the slab is ij0 r+m qg6(p ics3sk2nx0ff:q nserted?

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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 fully charo,udy4eat y r.ib93n /do da3vku0*9oged. 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 isd09i ,yb4*ud9o3vodrt auk3 ya/.eon the voltage across the capacitor's plates after the slab is inserted?

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