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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 vector?qpp6wcz +t ccmul1kowxn ( :. f.hy;,+

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomc4g)2 -rpw7z7o a/zabe hp a.vb 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 surroundings. Objg2np uqclzc:;6stmt37.mh j2 ect A has a net charge of excess electrons. Objej72 tzs.32;hq l ptcm6:mcgnuct B 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 in the av0lylfg)c;/ 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 diq*q /3s2xq9b sc /ubjdrection 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 h25y8.6 *byqanl ;vq: akevzabollow 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 0r,qak iz +ll8u-,c ufis accelerated from rest to a speed v by a 500 V potential difference. If the potenticlaiuu k+0 z-,8f,qrlal difference is changed 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 th/v7u8 x9 m xanb4g q2vhgx4xc5e 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 poinemv 6+h p t 3+oyz38ya vym-jnlczy7;5t A to point B along an equipotential surface.hjymoz++ ynye ;5- av7cz3y68tvlm p3

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface musti; f+xzak (odb;hx-b2 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 carrying a charge equal to thxdrb pk4 1.4mtat on the electron as a result of moving through a potential d1kptrxm4b .4difference 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 ourr+ qk,8;kzsjvk vi*i+z7k ;f

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspox4;z lqw77,81tyzl; jza dmc unds 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 ofywru ,tlof5 :9 2.0 m from a positive point charge is 100 V fylr:,ou95tw . What is the absolute 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 potenti)qe vbiyva(l5l+7sqs )i34 o ral at a distance of 2.0 m from a negative point charge is -100s(iol+qi)rvl3q5a)4 es7 vy b V. What is the absolute 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 3.0p:6-esc nvttmuu7i ),eyfqg od *) w4/ V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square)i:tfm ,v)w/-674 oectquunspey* g d'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 fua3 y*d5 z9;+2dftay*b/ p et ystn*othe center of a square is 3.0 V when a charge of +Q is located at one of the square's co5od/y+u;f btza* d snpay9**ytte3f2 rners. 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 ej8ovw( ,mby6of 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 is y1e6vi,qw ef,jv8 bg*b5s*9wcaame ; 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 zsvl6fj8 exd n1 mx4c/pv66.lhas twice the plate area of the other. If the smaller capacitor has cap/ xvnfe6 mpl 6jsvd.16 c84lzxacitance 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 Cxdp20p9q zw 3a. If the area of the plates is doubled pdwp x29 0a3qzand 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-pljctth5 s kh:3)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 ajk)s c3h5ht :ts 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 -e;5zw. j0jy za3aidtplates of a given capacitor is weakened, the capacitance of that cap-j.30dt iz5eaz jy ;awacitor

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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 w w 3)ahixqldf*l44fv+y rz 9a 1hep.yeigu6 97ith constant voltage by a battery as they are pulled apaq dflz3ix9 f6.)74ep94alair*v+y e1uwhhgy rt. 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 main lbh8ve rl1g :-ogy): lf.ex8vd)vj *otained with constant voltage by a battery as they are pull*j1vd -fe:)loe b8.hvlog) r8 :vgxlyed 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 fo 0xkphsz,1k(c r adding a dielectric material between the plates of a capaci,z xp1ch0k(sk tor.
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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 placp ;q1a0tw--d(uxqe gx,d,esied between the plates of a capacitor. What happeep1a ;d0tuxqw -dx sg e,,-qi(ns 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:r6y .pzy /xe: -lctavogka4; such as paper is placed between the plates of a capacitor holding a fixed charge. What happexyt ;z a:l.p4 v:-/6corayg kens 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 b3:it 9(jyf/yc1 drj baecomes fully charged. The capacitor is then disconnecycy1(d9r:/j a jtbif3 ted, 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 holding a constant charge cau, 5ceubmtdpi.239tj eses the energ5t2p. cumt d 9ei,3bejy stored 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 iysl18 *o ou63yrr5qiacross a given capacitor causes the energy stored in that c8y5o y3s6l1u*riroiqapacitor 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 poinqsi/ jvi)-vc h-9 kij3t B. What is the potential difference between points A andjv- kc-sh/j qi9v )3ii 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 the po.f *vdi(+wco stential is -50 V c(+dif ovs.*w, to point 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 accelerated throu ob6-2yf* jlao1v(lv j0zul8m gh an electric potential difference of 500 Vvm81*zlo-vj 2u0(fb y6lloa j. 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, w64f:e e,l0 jynsyj ;/4 no hi-h,nejfis accelerated through an electric potential difference of 500 V. What is the speed of thes :,y/o h0e,enjyi 4 jnf6-h4 ewln;fj 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 differenpt2574w nr ccvce of 1200 V. What speed does it acquir 7 tvnc54cp2rwe?

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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 v9ghl)q5 h.f;-k zbbx do 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 ktqfw/t45 7bvp l,un(V. What is the velocity of the electron afterwawvu b5,k4 l7fn/p tq(trd?

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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 77d)a bcm w ofuu60rh+0+y li wt2sv6maccelerated from rest through a potential difference, and a wtvl achd bi7)6yofr+mu26s+m 7 00uwfterward 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 mainta9,s/gm:f;* lmyly* mt dyq1yains the electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the df* y9/:m tm; gl,syy *ay1qmlelectric 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 nhm3wom/;g d r25se5 jmagnitude of 500 V/m, is directed parallel to the +x axis. If the pote/oh;g325wns5edmm r jntial 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 d 4+tsy-msstok -02cfa m0 z5qiirected toward the east. If the voltage measured relative to groundi- yf+tqz-mss50koamt02 c4s 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 direcb k8u v4gx)pdg1l;e:ytion of an electric field of magnitude 3.0 V/m. What is t4 p1e8ub ; :xdgy)kvglhe 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 av) xv .dfczf2pf*tb+3 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 vx.f+z2 3v ptf*)fcdb1.50 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 i;/7 jbi)jpeiz*jf 3nconnected to a 12-V battery. An electron released from rest at a location 0.10 m from the nega f/jj)zn3*ip; ji7ie btive 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.q* +ci8.y9m a3u9vuq9vhaxx +, tpvkt20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m froau. mp9iq 8,a3+v+9cxky*tqhv9 vtxum 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 50h:eja4c7k6 pf8arp ywblhqfc9v 0706 N/C directed toward the east. If the voc w89aqbp 46f :7kjh0e76capfy0 h lrvltage 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 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 the vojfy -z:wm*j/6we. l beltage measured relative to ground at a given point in twb l /j eyzw*:j6f-.emhe 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 pot2a:eh - c;gxrw*p dqd7ential difference of 12 V, it will acquire a kinetic energyw*p2r qhd-: xecg;da7 (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 disn te(gz9i2-4:oawvy jrle3o0tance 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 ele-n9s5, 2o o4z spkj,axjugru 2ctrical potential for the center of the mes a2k2rj, n49gosu,p-xjzo u 5ter 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 -2yd, x2ffgb50 x.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, wx2gx0b,yf f d5hat 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 charge is at (3.0 m, 0wv :0 08ckhv2refun7g ). If the potential is taken to be zero at infinity, what is the :fv0kue82 v 0gwrc7 nhelectric 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 iscp ,s(dr,:laj at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bd:l(cja ,p ,rsring 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 char03n umt;gk-i sa9f y0gge +q are placed at the corners of a rectangle of sides a and b. What is the potea 00m -tsgfgiyku3n9; ntial 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 ari okw xk8 7le2bu+p4bk;n;;;3w tvzibe 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 potenkekw;i ;nop;b72+8vi;k3 l bxwz b4uttial 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 (chtgtb7lk2;h9;rzzj uai x(5v;arge +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 thymay /a+x hh/p(f* b-/x39 sgxpssi.sree charges, each of 2.0 mC, at the corners of an equilateral triangle of sid+ia/ xxyxps(9a3pm gf yss/-h.bs*/ he 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 whenszbnar*:g0un:g w qy 50bcc:; it is charged to 100 V?bc ug:srqa nc0::y;b5w*g0 zn

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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 area dx.8w +j sba;u4ohtc1 $0.50 \; m^{2}$ 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 separ+vj //xjowg50l ds(x nated by 0.050 mm. If the capacitance is svw j 50j/noxd+glx (/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 plates of ar7 d.jghz 3d.gtea $0.20 \; m^{2}$ 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 the potentialxx0d8g v)upc- difference betc uxpv0d )g-8xween the plates 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 ij w2bgpc+i- j1pn7+f6+ygid is connected across a 100-V battery. After the battery fully charges the capacitor, 7j+iw j+p- 1ciygb d2n i+pfg6the 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 plv smlz6t.r)2o;,t*lby* oazgaced on a 15 mF capacitor. How much energy is stored in t*6bs z.,tv*g r; ml2y)o ztaolhe capacitor?

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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 hejm uh)w;z8vi 6/*v ya 15 mF capacitor. What is the energy stored in the capacitor?e*uvy)hv 8mwzj;h 6 /i

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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 ofi gc5bk9du ut4..)gwaj8 ubuinc r 2,2 a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capacito24kd r .) b u2j 9uu,wtccu.58gbaiingr?

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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 charged so that it n b2s,dqvswaw fif wwpg :/o w8nf8.na17-;(vstores $2.0 \times 10^{-3} \; J$ 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 of arevv4ry,w+wocevxc39zl niqma 31(r ;.a $1.5 \times 10^{-4} \; m^{2}$ 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 capacl efkp.cy9h3/itor 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 of ar5(2tjb-p4s q 1t o6,y ps3bn0si wgvxnea $1.5 \times 10^{-4} \; m^{2}$ 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 constrat 2 m5 q 7ewhy1aa0uzm(i.hbv -z;q0ructed 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 capacito)dwpws f9dd:4ay.(/o73fa gixn fi/tr 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 50-V battery ln5bhn b0 ;arm.ki..k 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 an.i.rh .bkblmak50n; 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 ms*j)hoz1 f6j to a 50-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, wha1*fz o6 mjjh)st is the voltage across the capacitor's plates after the slab is inserted?

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