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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 not a vectv6zctu-2diy16 iys8q do ,mg/or?

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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 imjl2y jtq+d)a*-vc:2eul*n wu mp 7y ;s 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 t/a)o*t ,spyda8 gmv6r3uq+ zn heir surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object so rd ut8+6 p/*z3va,mnaq)gy 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 thh9s +ak *eo,qge 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 opposite to the mjdhs.i0-r00ud q e-t 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 spher ibmllz-y, j:1e. 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 .e9m9y6i-t9omduo +hyi sl7nvww+ 4 da 500 V potential difference. If the potential difference is chanmv6w+yto .u4o nm9d9+-dish7 l wyi9eged 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 potential ifsnh:u fv */j,k fwm+-s 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 to9wysmgkx,l-/8o8;(i yf gv/a gugg t) point B along an equipotential surface.8ug aos8mw;yl/,9yv/ gg)-(kt ig xgf

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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 b t y:hg*o6 *b 4jgyy-dw,ey9sze

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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 carryi bli41zk)rv2wqk -93h5lr xa2-gtpzxng a charge equal to that on the electron as a )lxi3r-tbwv1g-29z2 p5 kq4 x zhlrka 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 a unit odslg;i9n * vem-v8)yfdfo 77 uf

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresponds f5z:omz* cmx,;qkcf nn+s1- nto

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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 c6nt6dx )shs v9harge is 100 V. What is the absolute potential 4.0 m away from the sas9t66nv dsh )xme 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 frol sj iiw(6 213kczkan/m a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point cha6kc/3a21sw j (zl kniirge?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potentia+fj hl6lg/ )mil at the 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 potential at the square's center when each of the other corners is also fm l ijl+f/)g6hilled 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 +Qo/n*5f 6ndkw4snhhz8 c;* tb j is located at bnh* w4/8scn;z6 *o fkjnh d5tone 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 9q1ge3ivj; lknia: 05qy* cu dtwo 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 x n4 rfg:gr/z1wes a 3(6qd1gfis 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 exceptme:;g9-gwt4ktq (hl a that one has twice the plate area oftm(hg: t eglqa9wk4-; the other. 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 capacitance of C. If the area of the platem5i xt ):ypf(ss is doubled and the distance between the plates is halved, what is the new ci(x sf:m)pty5apacitance?

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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-plj b/uge 0tf ,zxo*/qp(ate capacitor fully and then is removed. The plates are immediately 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 tz ug(e jx,b/ptq*/of0hey 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 weakeneqw -.vglhzv6k h5u 2g-d, the capacitance of that ca huhg-5q l2v 6.wvzg-kpacitor

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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 voltage by +r9 *ab7azzyhml-dt4a *t4b+7al zmz dhyr-9 a battery as they are pulled 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 constanyy e.-y6w f6uk6h w5/t mfk7bdt voltage by a battery as tke6h ymy5 kb-7y uft6wdf.w /6hey are pulled 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 a dielectric material between the plates oh/*b vphgd2 :;jnwoow,p:m /p f a capacito/vp;o/b: nw p:ph *jgm2hdow ,r.
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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 placea+ul /pvhe( g*hdlhr3l2x l2yk +g)o(d between the plates of a capacitor./ hlgoe lgr( p2xkh*(yh+)lavl +d2 u3 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 plates of a cauf3t1 z)1feqc v-2w;u 9oav kvpacitor holding a fixed cha93uqvvcw;2fa1 )ve k-o ut1z frge. What happens 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 igm x 0za+,bru0s connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation z +ux0 rb0mg,abetween 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 capacito-n4 dq4t/r nbv*kzml :.e .x nra5p,yqr holding a constant charge causes the energy storednm qtevx nz4n.p/5y a,4 r-:dkr .*lqb 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 a given capacitor cau(8*6sym5bm ucd a/q9et: fbxt ses the energy stored in that capacitor t6fa(bmyd/c8 q*bt m59x :se uto

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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 chargqb. sph5 -0d,yg)oi k5xkeerm 9 v:kx:e from point A to point B. What is the potential diryxs dh kvx-m0ebpe)k og iq.:k5 :95,fference 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, where t evd5b)isf c;.hfe)u0f 2 9bgrhe potential is -50 V, to point B, where erbf)sei)9 c2g.5fh v 0d;bfuthe 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 r,y6bh)q /.zli sb5 glsest, is accelerated through an electric potential difference of 500 V. What is the kinetic enez,s/bh.5 ys) qbg ill6rgy 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 q z3n1()j6 8xg5jkbvwdiu4alat rest, is accelerated through an electric potential differe 1gzqu53lxbi)6(vka wj4j d8nnce of 500 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 fallskrizb qc+2/ b/5tfzb8 through a potential difference of 1200 V. What spek z +5/r zq/itc2bfb8bed 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 dv7 fe2pjj;bg)o 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 differencepo-tz(-k-o c-+ ywcc (zqoq6w of 500 V. What is the velocity of the elzcqz q((c6 - o+o-w-opwcy -ktectron 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 acceleratd 954 fyavtb n1ps.(sxed from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the poted a. (4y1 9pfnvb5xtssntial 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 1(dholl, d,)dw(tj zapx9; va difference between two parallel metal plates separated by 1.0 mm. Whadl(hd jta,l,z pv)1o ;x9 awd(t 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 fieldo 3i-bv m ;3ajyx/dqa,, with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at m;/yxd3i qv ,jb3aoa- 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 eleca -lnu ;t(5n *bcou6s,nnuw x,tric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what w*nul b ou5utx nan6 ,n,(cs;-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 r; dwe :cy98fmof magnitude 3.0 V/m. What is the cy98 ed; cf:rwmhange 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 /p85qx sep:g-a6r febconnected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrive/ -6rf e58gxepapb:qs s 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 xy)lidf z1+2e, are 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 muc)1d i+zex ly2fh 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 con:duu qm61u)lg rqh,h3nected to a 12-V battery. An electron released from rest at a locatiom1q)l:u du,rgqu3 h 6hn 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 electr51pu. gs zdg+t1erzo 8ic 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 isd+g8zgtsz 5r1pe .1u o 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 diry2.sub6fw(oc xtfsxsw 8hjnh b-)+34ected toward the east. If the voltage measured relative to ground a8w4 .tjs+ob x)hb2 6-xf3 ssfy(hw ucnt a given point 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 potential difference of 12 V, it will acquire h dy(l6mrepj m-fk42 jtu*4j /a kinetic energy (in the absen(-f 6/ry t*lj mh4udk4me2j jpce 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 distmqp:+ m9 b bb0g26h dbupbm;9kance 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 +tsnj,7* pe ) az 6a e6vxfs+dzjt7b0npoten6 nfs*zb6 vjdts+p,)+x7e ne0jt 7aaztial 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 charge is at (3.0 m, 0naip1 sfxl,dr :)r .w7). If the potential is taken to be zero at infinity, what is t1nda wfp slrirx,. )7:he 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)0bq 1 gfm+u ms79;-q(ekm ivnc and a -2.0-nC 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 vmgk9c7 m 1(n-ibs+;meq qf u0charge 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-,bb e4pxkbc27 sy u*1knC charge is at (3.0 m, 0). If the potential is taken to be zero at in7y4p*1ub ske kbcx b2,finity, 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 recta7 k)n2jf i 01jk7engkrngle of side7nk0 n jf1k)72irekjgs a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.0 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 diagony() 1r:jsv*jt y:e oeob +eugo),h j;ually opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potenti*e bvhy:,1o()ty g u);rjj u+ooj:see al 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 +2en8/t6hb z6ewb 5eiav +, 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 s6j,lfuq/ gd8 three charges, each of 2.0 mC, at the corners of an equiljs6/ dg lf8q,uateral 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 rt 12tv8xek 4kof a 2.0-mF capacitor when it is charged to 100 V?2v8rk 4t1 texk

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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 (o ,*v z0nr vvtmu-zz)r0faccy k 01,jhas 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 are separated b/j.50 6gu9 ogtf(kjys ecoi9ey 0.050 mm. If the capacitance is 17.3 pF, whs 5eyug.(jgo etk/cjif69o0 9at 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 plates of b )4y ,iepur b33fdj/zarea $0.20 \; m^{2}$ 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.t9qo;9;x gnio 0nhh o a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate 0ioq;ng;ho ox .9 n9that 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 acros*io:a+,z e cht.uc f:ps a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much ad: +i c:.e zpacf,ouht*ditional 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. How much energy is stored / bsdjpw 9a3s92/nkoxin the capacdxw/2/ob3ps jksn9 9aitor?

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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 the00*;gwj7-*r j wge mgwpco7 pr energy stored in the capaci-g gjw owr*rjw0 0p*c7em;7pgtor?

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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 th+b9ojvxxv cvv::i j6ugg9gsm ,/r1 ;s e plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in chav:j6o ug,srj/v 9;xvi9 c1 xgm g+:svbrging 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.yimv;j w+ls54n :*c:wgyfsp 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 consists ofqjir htj970 4j 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 capaciikn-5y z 26ouctor 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 capfxkw5k0 9 yx bb iu0 f5a0x96.y: ninboajf8p6acitor 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 is8 /cg zrmk:9v/*ge nyb6f3fe ka)mgr0 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 cap z(c*2;b o dvx)kfr0ggacitor is constructed 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 50t+/ k7k :5lbfd jjrvv+cr , 1;txxob0d-V battery and becomes fully charged. The batvx;/xjtk+dbrjrf ld,ct0:5b7 kv+ o1tery 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 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 beco: *+1nn sd ru+ 7m-ppd9ioretvmes fully charged. The battery is removed and a slnn9t im rer7 -ds po1*+:uvd+pab 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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