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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 followin dpf6f/hrl5/-b 8hmg l c:z9ong 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 p3v1tjk(dv e;y ut9a i yb ))503lxvsbis 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 objectsdd4.2 2ze9ydfx.+l yf:7lbdq imca s; are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Whi9 +e.fs7y a2;qlbmdclf4i:zd.y ddx2 ch 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 el tv79vr 8avc;c*a gwu p42nxykhh9t* 2ectric 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 oppoq/i (ncj f,8.: sraki .k5ecgnsite 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 c1)(xab jkh rzf d1v/x7k,4 4mxvp tb5uonducting 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 potejf1g*8w ztyl 0ur+j+ft pi:9 intial difference. If the potential difference is changed to 20+zug+ 0ryti 1i lw j:f*t8jf9p00 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 potential is rq1pso: (56kzxia( +m ;yxbfnreferred 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 iss qrq t.p 9 p;,uudb02oan/1 fmxid)x9 moved from point A to point B along an equipotential surfacen.0dias bt/ x9)q1 9 fpux;mo2,rd upq.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface m;trnfpfj57l1o rgeuqk : 3v)3 ust 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 carryingc, +u lr88k wssrhe37k a charge equal to that on the electron as a result of moving through a potential dif u8,+3ses klrr w7hk8cference 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 una wlwk8y7dp9o-kk )*j it 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 correspe4wpp i.4cq3gq -wr0 u4chmp;onds 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 kyp:/ (bi ;nq8gxmb v.k*rsnj*v-wf1 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point *(* nk 8:bmpfyb- ;krgwijvvn/s1.xqcharge?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential a,z /lt ulmq+5at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same poi, lat+qm/u l5znt 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 3q/-yug;z(u.unr r/jkk fr 8z2.0 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 alsyn(ur ;r8 uz-jk//2qg.r kfz uo 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 cenxu /u u9g)mqbwfrb55 *ter of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolutu5uf*5bu)wg r9qbx/ m e 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 chxbv9hdl2 gck;sx .n6 /arges 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 *g ,ghm 5mvg9va

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate cf *7 j rk.byumfm+3dm1 :qsu/fapacitors are identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the l 7mm/usjf* rd1q:+y3k um.ffbarger 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 u0yvj 6n0iv 1p,qrm8elpy n pb(;z,s9capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, w(m0p6;,e l8bvz i9yqupjn0vsr n,yp1hat 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 capac rib;* 2znmit-itor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of char;zmii2b -nr t*ge 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 fswp6l 4f z/(ha given capacitor is weakened, the capacitance of that capacitor/hpf64fl( zws

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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 mrjs rbnc*v5o y28vj 80aintained with constant voltage by a battery as they are pull2r05corv8 ynjb *s8jved 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-pla8 68tk 8tug up dfg: ibapxy3dj53al75te capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of th:p5la 3888ktbd iyfa7x d6guugp5 t3je 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 m0.r 2b:ke 9hkx(f)iy9;qaloeipv e :aaterial between the plates of a capak2qh9l )oaxei;y9:p.r 0e a k:ifbv( ecitor.
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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 p:mt 01o6d):lb)ri vlslz: p sqlaced between the plates of a capacitor.)s1 zlb:) slvq::6om0rdit pl What 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 plate6fdn,3imiaf u1xeq ;3 s of a capacitor holding a fixed charge. What happens to;f u33xifnd16 ,amqei 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;m 1iy/5djpzl o,x2k w fully charged. The capacitor is then discl p,k/zj5 mo;ixw1y2donnected, 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 of a capacitor hoihsjp0fq.y,14ksp 0 6 yo ++ fnx-.jil2ysrnylding a constant charge causes the energy stored in that capacit4.-y++jyssl qp0 y .ny0j xrkf2 is,pohnf16ior 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 stored * t/ef- behzriu.s u8sia74f+ in that capacito7.ui-use+thff* zbais8 re/4r 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 ;2 5b0gndy()j6 1zpuwuk q rmaof charge from point A to point B. What is the potential differencg5;u(y mj)pa dr2 1kz6wn b0que 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 evm,x) r 5y/:eqwhm yz3lectron from point A, where the potential is -50 V, to point B, wh5:y/zmwqehr)x ym3 v, ere 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 electn7+kc6amietvt+l 8/b ric potential difference of 500 V. What is the kinetic energy 8vm/ in+tc67bklae t+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 /blzu(*e i8 ;;nrelcw9 tbc;urest, is accelerated through an electric potential difference of 500 V. What is utebl*c8ln; cwube 9; ;(zri/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 through a potential difference of 1200 V. is)9q r 757nthzo.llp .3ed9puwvkv( What speed dt9 q wdiunlkph3e7l 5 .79ov(sp.z)rvoes 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 2thkdrl 72m o2g.el4hdo 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 electro o ct oa2/h+9+y.hddkjn is accelerated through a potential difference of 500 V. What is the velocity of the electron afterwo+ d 2y d.hk9+t/aocjhard?

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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 accelera*8rkii*ag3 asp(0w n gted from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What i*i sp*a3igkn(0ar 8wg s 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 potential difference between two p r ik;bx/b2tr.arallel metal plates separated by 1.b b 2xrr;itk/.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, with a magnitude of 500pyx4typrx +h6girn3 8 8+ x4xl V/m, is directed parallel to the +x axis. If the pote gxxxxr6irny+8 yl p3p8+t4h 4ntial 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 elec*bzbl 1euupz+9 fdryy5 aq;8(tric field of 50 N/C directed toward the east. If the voltage measuredr8bblqzy+ef * ua9d5(yz1u; p 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 magnitudefnf 8) vzv0 1/yqzjk*z 3.0 V/m. What is the change in 10v jzyf/* q8nfv)z zkkinetic 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 qx u(nbbqb/ 7c3 xzxf 9x04q-fm ix,t*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 3zx07tf-q/(b9ux 4fqx,c qib nbx xm*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 connected to a 12-Vo w8rfa b-o o+vw+ia7zvus1i:qb, b .9 battery. An electron released from rest at a location 0.10 m from the negi wbrb+ +z: wva8u booqos.a7- 9ivf1,ative 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. Anynzj6m ;;2loe1 .qb o+ rnaoy3 electron released from rest at a location 0.10 m from the nonybayr qm.o36e2+zo ;1n ; ljegative 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 etkg, *q611uhjxh )ywk 7 bf,ajlectric 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 po7q1a k61hb* ) hjw ,xyfktg,ujint?

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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 ouph7;i9wfkk/5*d)o(m5 n2b yx v nimeast. If the voltage measured relative to ground at a given poo5p;kw /75 hi)do(vnk xy if*n 2bmm9uint in the field is 80 V, 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 pot 8fkubl-flv7,wjb ,awd0 f80v ential difference of 12 V, it will acquire a kinetic energy wk7 fbvaw, 0ufl8l80d, bfj-v(in 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 distilaf,orytra.7 arto .2 *2;pe ance 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 meter stick. Find the electrical pote1n. hoquxh6 3antial for the center of the mun h1oah36.qx eter 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). mw3dhrh/f:d(:o20lz rd 1 wffq*n5q q If the potential ifofdr5qrlw 2mf 0(3hzh *q: n/:w1 dqds 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-nC esst 0oa 5(. a6ewfcs1charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electstes 0fa .w65o(sac e1ric 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 -2.5 bkyluc.uy sxhl *1190-nC charge is at (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 from infinity to point (0, 4.0 m* u1hl19c5 yxlks.byu)?

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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 ch n7d;yor (bo7karge +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 = 3.0oo7r7nd y;( bk 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 p8+zojy kx /c, 3uigmtwa /8pjqp5)gp yan 5*t1laced in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC andipat,g/m /qw 5 ja3tp*zju p+k85oyxg ycn1 )8 -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, mazxx c: nz7b/2d,uq4q hss $6.64 \times 10^{-27} \; kg$) 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 cow-ye2d0v/ pph rners of an equilateral triangle of side 2.0 cm?02 y ppe/vw-dh

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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 tvz*q hed7(yom(s 2y9i o 100(z9qy7iyhdm (vo2 s e* 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 has plates of 6 gf6eer sy)vj3b 9lpdh2g9g- 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 plates9/ b;d 8gzcyvk are separated by 0.050 mm. If the capacitance is 17.3 pF, what 8c/;y v9zgdkb 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 capacig5 z2pcv.vq219q hcuie: 4zzl tor 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 separati31b,t5n muhuton of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric f15,hn umu 3bttield 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 fu30(q9icq)dg m xp8peaez6es :lly charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows frq3ciax(gz9qeee0sm dp)6:p8 om 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 ok5 b0m.6 is hbiv:s;sin a 15 mF capacitor. How much energy is stored in the csvh;b0i 5ii .6s:sbm kapacitor?

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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 t,g;-v podf sb:vl s+yud,;ts 5he energy stored in the capacito ;u: -f5s,lsovvgdt b+,;dpysr?

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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 wamb8i1ls/q9i ;4da4q rw)wk z3jc9 lflows onto the plates of a capacitor when it is connected to a 12.0-V batter wkql)4imsbai c;w4 z3rqw/dj 19a98ly. 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 ise+22:zjv7fn0 llptsk n -c bv6 charged 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 consic/n/ mm0m3wr mv 4bvh;u c ipv1l,,+lists 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 od(w8r5bzy9 a 8 co0ir2 bv.hdlf 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 capa5w tin8f;8p3qkj.o agcitor 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 fdo 7bvkg9biqj 7 4 p*mqr 0e21y-mj,rof $0.40 \; m^{2}$ 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 area of-a66bbnm 4to,,eh j ca $0.40 \; m^{2}$ 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 a2psa4wv d 99f gt85aoto a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space betwee9p94a 58votfwa2g asd n 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 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 506k9 nvt0 oa7eeub*aq 6-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills kqnao7b*6 tu e v6ae09the 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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