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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 is3n(h l:p-qp6jncr b6buobcy5o1nl . 3 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 4,9- ,jncptu iixjxmd4*sd5wbi m40a 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 objects are insulated from their surroundiiw2 xb)7xd) u:pf n.ch0xne .ungs. Object A has a net charge of excess electrons. Object Bx: cwpnhxx7 d)e20fbi u.) .un 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 leo pcehz0mk*q03( x8in the direction 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 oppon .p/qtxv ,q7fx.z1tnsite 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. Thexxprjx 2m)vzc .,- o;( kzn1zhy

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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 tofjua *p*yp).c a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the bpup*fjay ) c*.all 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 arexyms r; js1;0v *prfw+ 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 B along an eqdbd na8-w ew0 3ylog8.uipotential surfac - n0w3yl.gwdda8e8o be.

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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 q:yq k-,vm*fsbe

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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 q+ia5:w..z zbxiikckd; 9guy(oi a -+a particle carrying a charge equal to that on the electrob-+cwidzk+.;q9:5 z xuii .oaai (ky gn as a result 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 ko* y-cjcbj+4a 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 corr;w/lr8kaj t(b3v b,**cbdr v wesponds 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 pos*9d0z3nclqhw ii v)-n 1iezl5 itive point charge is 100 V. What is the absolute potential 4.0 m away from the same )qnz 1we 539llndzvii0ic- *h 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 point charge is8y6 kj6 yan .xme;1ajw -100 V. What is the absoljm8e1 ja;. xwk66nya yute 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 a square is 3.0 V when a charge orr0mkf73dkg5 f +Q is located at one of the square's0rf gdr3km5 k7 corners. What is the absolute potential 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 avt8s)ka l*wh 2;,lbvl square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute pote;k2,h8 *lvl sblavtw )ntial 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 consisf1 r*l l /acdstc22x 8tco1ohp1xi9-tt of 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 isus -57uz;t(eto0n .0ge nid bs 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 resptw27hc y/tsbp5d e4q3g jl3 0eect except that one has twice the plate area of the other. If the smaller ca t ch3qjld2b7t4wsy5 e/g3ep0pacitor 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 has a capacigwwjo(7 wm;ouk* :ih(tance of C. If the area of the plates is doubled and the distance bet k:;(uh (mw*iw gooj7wween 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 capacitor fully0 //plu*g no:ny 8oux*qc (rqc and then is removed. The plates are immediately pulled apart. (/yxqu*n/ *qon:pcuo0r ( 8lgc 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, thefn2s kudcn1+ 7szoa+) capacitance of thac7s +a nzf+)kd nuos21t 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 capaci-g j+; zr)nsector are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates mustz+ -;c rs)nejg

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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 a.hr0gh0 oowy* re maintained with constant voltage by a battery as they are pulled apart. h .yohr*o0w0 g 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 a dielectric material - t .5by )3i97 pepq;kikpb9g7taasii4ebs) cbetween the plates of a capa5pc 39 9t4)ypai.; e ibb-g sk7ti7)b qkeaispcitor.
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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 e 8fg.dn2-kw4lf4jcm779m giuv(nv ubetween the plates of a capacitor. Wh79 n lfki28jve. 4gc(gdn7 wmuvum f-4at 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 platg q:*/qr7 huoon hlwr8/8p:ys0ap9fd es of a capacitor holding a fixed charge. What happens tupqh g:hn7/9*orp 0yaqro:s8/d flw8o 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 batter))l6dqhfn )xq2o rjq2sq4)l z y 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 this capacitor hajq6 h))f2zldr4)l2 qxqs onq)s

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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 charge causes trq kzm0x-0xoe m +y0b9he energy stbm0x z0+omxke-r90q y ored 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 ghbbb.nwd(agmqd;7y4 gt7 +3 a given capacitor causes the energy stored in that capacit db gd7(b3a7hb +gqw. ygmt;4nor 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 t0,g zwx46iv7df zvw d8o move 10 C of charge from point A to point B. What is the potential difference between points A a7 wg0dw xf,z8vdvi46z nd 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, wherownhw1y)n :.qyb 5ci 7e the potential is -50 V, to point B, where thiw7.by 1nw)nh5c qy:o e 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 electri+.+6ihripev 3kj (ohe c potential difference of 506k i3e(. he+hrviop +j0 V. What is 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 accelerated1hq*nb tk3 -km:xxwd 7 through an electric potential difference of 500 V. What is tdq7m*:3 nh-xkw kbx1the 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 1200 Vqc9pp r41jcoqhd *:/w . Whatrop: jcdqc q9 4h*p/w1 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 doi7lvr: 02jvlqphas4, sy3g v0 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 potential difference of 500 Vjg 8r5q.em 4 ou.xp.2ls+gqh d. What is the velocity of thgmoqd +h5gqsu.8 jl2r..x ep4e 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 ac+48v ) yzlwohlcelerated from rest through a potential difference, and afterward the ball is moving atzo)hll+ 4vyw 8 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 potee b d*ijdrhb w8.2vu.1ntial difference between two parallel metal plates separatebe j*hr 1vidd2 .8wu.bd by 1.0 mm. What 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, wit fvevr3m 7ebz*-rjl :2h a magnitude of 500 V/m, is directed parallel to the +x axis. If tjvel72zrf-:v b*r3m e he 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 toward the east. Itxn5w3-go .yrf* wah(b.uj2,hu3jwh f the voltage measured relative to ground at a given p(xhuag3 -bw wthjhru* fj .w.n y,235ooint 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/rmj-+.jze x/wq l 8bx:t;s 4y7jijm g the direction of an electric field of magnitude 3.0 V/m. What isxq /we-y it+j /m4slj.8z gbjm;r7jx : 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/wy 5un 4er0fgr/te h/ec +fb6 a 12-V battery. An electron released from rest at a location 0.e0y 65rufh4/ fc+ getnw/b /re10 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 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 conneh1ll, )/9 eqdrxhsm9tcted 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 x1eq9s dmlht)rh,/l 9 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 coda :n, svv3e)laoy k3r fcl,/0nnected 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 prv v ):ac /yndefo,ls3ka3 ,0lositive 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 zn(8+kf9i rxz(cn 8ngzvet ;2+ )ciimN/C directed toward the east. If the voltage measured relative to ground at a given point inn9;+ zcr(izevgkmc8 zxii)2t 8n +f(n 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 h5qtjofbu2 e56b/5rithe 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 pointr2 btfohq5u/ b 5ei65j?

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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 diffeoc1( mpy4jwoxco6 1t5rence of 12 V, it will acquire a kinetic energy (ic6ocm( t15o4 wx jp1yon 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 of fb 3onts6 1b0t$5.0 \times 10^{-10} \; m$ 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 2xuh bsqy 7y r7f)aou:p631yf meter stick. Find the electrical potential for the center 6 p 7 r2) oua7usyx:yq1yhff3bof 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 at (3.0 m, 0). If tw)d lx9 4+an,+8onn)ye byhflhe potential iflyea )x4y+b+hw8 nl,)d9nn os 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 a -2.0-nd h2v1krq zg98C charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the z1hg 8r9vqkd2electric 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 a p+;ja:l ti(eo pg07e(3.0 m, 0). If the potential is ;lp+aep(7g jaei0 to: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 cdp.vr(7 +;o7d x bhzm l-.;yq*yfywi jharge +q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.0wjq; ymixpo -rhv.+*fb7 d(zyy .l7;d 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 l y2 q5bl1*xpelvt,/n 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 potepxl yn/qb *llve12,t5ntial 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, mass.c8v)oh01ztat kj8 lzsyz:6v $6.64 \times 10^{-27} \; kg$) 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 cay87jjx x*o ks(n co6 klw2j6)harges, each of 2.0 mC, at the corners of an equilateral triangle of side 2.0 cm?ljxc)knjox s(27o6w86y *akj

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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 charge;clh +:hqie(;m nby p2d to 100 Vl;q y (mihpb+; 2:cehn?

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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 4vsbw3 1:;:7yc*jdxyzw q daoof 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 capassq o2 l vqnv-hy 7t976a:*elxcitor is filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what islv ohae :qq 6*l2sv9-tn7sx y7 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 mf1y+ zat 4(jzxi/f8is 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. Ifklv umbf ( knu2fu4nu4138 xc/ the potential difference between the plates is 2000 V, with the top plate at the higher /bcm xn413un vuk(l 2fuu8 f4kpotential, 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 acrc,,pgx n w.f:moss a 100-V battery. After the battery fully charges the capagc,:w,. mfxnpcitor, 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 a 15 mF capacitor. Howuf dva 0e :wj,x(obq (5crro*1 much energy is stored in the capaci, oc(oa(*rb :5jqdru0f1xwev tor?

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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 fwp,7qd q;uuco10 ;:hsdw( kxenergy stored in the capacitodh 1w 0kwx;qu(7sp,c:;q ouf dr?

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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 -35 t zb3rgjrrwhen it is connected to a 12.0-V batteg tr j5zr3r3b-ry. How much work 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 chargem2:envp )h3iz d 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 of plates;a,3ta 2bmhve tp(;gh-a2x kc 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 consistsby4u+x b9:/s :ocosap 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 consil n5no;g6rl2ohn0l ,dsts 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 capa64qetqkjaf) , citor 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 capacitor is constructed with plate areag w,qz-4gj 5bi+vw:pm 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 fulledgqh +tf n-59y 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 insg -ed 59qhft+nerted?

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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 xh8r;zuw 2sx )battery and becomes fully charged. The batters8z2)xwhu rx; y 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 voltage across the capacitor's plates after the slab is inserted?

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