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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 n7d -rh(wp9od r r t79oq9ydz3oot 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 xy( 7q 50eab csk4e5mia;b(k sis 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 areuqr0::v)bj rh j*tx0p insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which xtur vp0*: jbr0 qhj):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 t m)n0kkfg, x6lhe 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 ae.o, :gdqce 91w- jnd3kx*aou 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 condpik+pr3; c8y hucting 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 p-;z*cq( mr uehob3q k)otential difference. If the potential difference is changed to 2000 V, what wieo r(mzq u*cqh;-)3bkll 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 tph 58f l edpklj49c k5f+h*,bmhe 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 poib3 mmg(w( 0ow8ca l*ront A to point B along an equipotential surface.*(r b cog o(wla38w0mm

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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 beb78b ojvwqx 70

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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 on the electry hc7i kqxp */;q(/izeon as a result of moving through a potential diff//7 (yec;qi kz*i pqhxerence 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 unieuep(k/, rqd4 t 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 correspon /o4 x1,y smucd, ikh:zwix0q)ds 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 poip/rrlw91nyzxfp q,c0)o+ *ignt charge is 100 V. What is the ai)fr1p0wx9lp ncg,+rozy/q*bsolute potential 4.0 m 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 cb gc*b8lkf (aww9q2,at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away fromwc*(cgbl,af98qk b 2w 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 f bkm r+1v.0.1bd e2wq(o6jgyhzjfy-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 fillejb6f(y gdzj2 0mohqryw+ ..1f1-vbked 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 a315eizub f4qf charge of +Q is l1qi5f3 4zu efbocated at one 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 sl15d15pcie acharges 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 is axo9s 1n72)grp6cmf ni

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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 ppnt3pi*)znj a.9(bh respect except that one has twice the plate area of the ot.z9j ()ihpbp* apnt n3her. 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 has a cap jewj9:+)q u4ee .bmfbacitance of C. If the area of the plates is doubled and the distance b.bj4wqb +me9eej :)ufetween 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-plakarh:(7)7yb7ud ,mgmcn s ;vnte capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of chargumg;7n7 ,ya: dsbkr)h7 m(vcn e 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 capaci; v4egzkm-5d;vf 1/atgd 0 yxjbx/v*q7 v2bf ftor is weakened, the capacitance of that capaa /z;kqfffxjg0 2vx*t mv/vvd;4g1b7 yb d-e5citor

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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 constk2 dg4(i73f. bwj2hgj-w rv lu)4xvtgant voltage by a battery as they are pulh4 2tb.r 7( v wf 4igu)kggjwx2-dlj3vled apart. 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 capacitor are maintained with constant voltage bs5, 2p.k7h(lr )lnr+ ezm j,7vyz ungey a battery as they are pulled apart. What happens to the str7r2e.k v e7)g(lu,rnsy,z+lhpj5z m nength 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 o/:rbak/ah:n 3aux b3the plates of a capahb/aon/3:3 u rbxkaa: citor.
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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 uf) -r jk;*rzabetween the plates of a capacitor. What happens to the cfuj;k-z *ar )rapacitance?

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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 ofav )wo3v hh1y8 a capacitor holding a fixed charge. What happens v 3yhohv8a)1w 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 fully charged.7,:e;of/ qjfspme d 24(uwaos The ca/ (oj,pm;a: 2ssedwue 7fq4fopacitor 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 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 of5p y+tmvtq+s3 a capacitor holding a constant charge causes the energy stored in thaysp+vt + 35tmqt 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 causes the energy strrc nw (5+ 48szm;kgnqored in that capacitor tgr km(n;n 4zcw8 qr+s5o

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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 joot0gyr7b- 6+bp/j+ kiige* a5t c8wA to point B. What is the potential di gibt*pij or/w0a tgeo75bck6y++ -j8fference 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 electron from point A, wh u+* hakj-b4c. l0e(7stvflnhere the potential is -50 V, to poil(+efhlauntj.4 v *kbhc7-s 0nt 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 j d-d +pxn ssmvwg:i1f4,)+qgaccelerated through an electric potential difference of 500 V. What is the kinetic env+-4s 1pgqwx, jf g:+ d)snimdergy 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 acceleratxkibyp47tn (3ed through an electric potential difference of 500 V. What is the speed of the protonby nki7pxt(3 4?

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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 V. Whtn)ho 2u652 2dp htaacyc :7wtat speed dw oh2y6 ap2dt2nut75hc a:)ctoes 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 5nwtgopi j 7 *2srv7tg593zq hv-rxk: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 o7-qcnpf d;ascpo36(qxw d n;7f 500 V. What o(wn p 3-cs7c6;n;q qda7fxpdis 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 accelerateq *fkxzz57 f3kvnn;:ld from rest through a potential difference, and aftf*x kz7f nqv;3k: lz5nerward 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 poten vcmh1skv;23p+ljz uz.u/o+g*2v gqqtial difference between two parallel metal plates separated by 1.0 mm. What ig +2/.osqv3;u *2q p+vljzzcmvu h1gks 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 para1b ,fo2jcprdd8 wx6 0jllel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potentialxfcdjp,0 12jbd86 wro 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 fieldnp4ih 3z52sh y of 50 N/C directed toward the east. If the voltage measured relative to ground a h 2hz4spyni53t 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 ol7f :2htxs* 1gxqsb 2jf an electric field of magnitude 3.0 V/m. What is the change in kinetic energy oh2x l7sqb*2s: f xj1gtf 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 connec/ /top tsrkhji4td*6gj ./vy (ted 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 1.5kd/(iott//4v. ypht6grs jj*0 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, arevb /.;sz e)vfo,8lddcj sn1x( 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 0.050 m from the positive plate, how much kinetic energy does the ed.dbn1o/;xvs(f , lcjs)8ev zlectron 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 con)l, arog;)fspi :i3ocnected to a 12-V battery. An electron released from rest at a ;a g,li)r3c:o)ifos plocation 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/C8c p8uobu6wl(9unr , o directed toward the east. If the voltage measured relative to gr(uru6 lp,cw9n8u8 booound 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 electric field of 50 N*j6f :/mtrwglp k dsx20.toxnhu):k//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 ad/x:tn)f.kpr m6o/h: s 0kjl*2wgxutt 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 m,tpei-7e sh7uar) ,zq-xc0 lof 12 V, it will acquire a kinetic energy (in the absenc)h ri-a q0suc7eze7x -mtl,p,e 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 otgjqm7td)sm,o4 1f 7bf $5.0 \times 10^{-10} \; m$ 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 meter stic s u684r*drsmik. Find the electrical potential for the center of the meter stic sdr64*irm8s uk.

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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 atguml-3upd i 6+ (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential a3uu i-gl+mpd6t 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-nC charge i-xa0qv dfx4p/ ;hgkrn+i, o)v s at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energyaq; i/ ndhxv4 k)gfox,r+-pv0 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 (3.0 m, 0).z i(v 5ikn2e;k If the potential is taken to be zero at ik5eii nk2 z;(vnfinity, 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 chkv 3b9 .(srn 9utq+weoe (4w( ads,bvsarge +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 = 2s3 +((,e.tw wbnde9 q v94rboua vsks(.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 side2xqur -bmft4y ,u( jj3. 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 absolutet4my x( rj, 2fu3buj-q 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 av kzw5 , q6y/jjb:rwj1x p1i(+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 charges, each of 2.0 mC, at the+g.5+t8t9z sego.mxe 8ar(qwhbv nj + corners of an equilaq+jan(zb+gw. xstmr8et +.98evho 5 gteral 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 when it is charged t-sreg o6f1 z, /tc2filo 100 V, rlftoe2s6/1-i fzgc?

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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 ha4:t xp8jyf ;fws 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 pl2yno,8 yv9 lv 6adt(ebates are separated by 0.050 mm. dnl,2a8 y(byev 6vto 9If 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 capacitor has 98dhq (,ngusdf(n: 5a ;roawb 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 ,)q6 1zhus qheof 5.0 cm. If the potential difference between the platehh6) 1qz,s euqs 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 2(jg i3u d4pgnpmkq.*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 tmip gdgj2n( k *u3p.4qhe 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 placec /,cu) zb/ q;n ;r*yaptx,rygd on a 15 mF capacitor. How much energy is stored in the crc*/c xat, ru;qpy)/g;,bynzapacitor?

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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 is3i. v,kln9,siliw *x p the energy stored in the capacixi9l,. lv ,pwknis*i3tor?

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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 core)s2sjp,gi)x 3 l4qi nnected to a 12.0-V battery. How much work was done in charging this capac3i4 ) ls g)i,rjepsx2qitor?

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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 chargejrj. -q 1j.is5 i7zmcpd 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 o1z j0oo-, owp nupz90ff 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 capacicmenzwai/a9f8+o 0. c *)v it* 9guopxtor 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 capaci (hitltk-yor t18d)t 0tor 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 construct3 1jvjkzyzo3/ ed 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 s 9 j(fe y0eh19c67hmy)u lemmconstructed 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 battery and becomes.cin2gh uk.ha (vgc58 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 uah.gkc. nvi2gh( c58 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 fully cha/we; )d+ oqaperged. 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 voltage across the capacitor's plates after the/p +od;ewe aq) slab is inserted?

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