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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 followind o e-*a oo2mydt)6n6xg 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 coulomuso ,0;sj(rfv b 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 surroundi8pzel 8hsa;k 7ngs. Object A has a net chh 88;ek7 aplszarge of excess electrons. Object 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 direction of the electric fiel7oc7i7tv; e x+dq.wb7mc uc2wd

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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 t 0-y:7qh o gho2hgdvs/o 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 pl,gz/ 8l4z gibpaced on a hollow 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 is(cs zw1 okw6 mt ljo3.7ab5y9z accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is chang57o 6 z9ka(jmzl wyo1c3swb.ted 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 potenw; fs,0g2x+wizz jse t8e9m.8muya* ztial 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 poiof*lxbjt21 - nnt A to point B along an equipotential surface2-* n1bxofljt.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mustv +; p z5ecy3el-zht+q 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 that on the electvd1 r4d6 cghe5ron as a result of moving through a potential difference of one volt is referred ved654hrc1d gto 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 isnf3ypq9 b,s1 j a 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 coxt2tpuooalfn5 1wi-4t( qa77g: o r6uazt h.3rresponds 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 -;-vdg zo-7mp3mdigvm from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point chargev-mg- pmog-;v 3dz7di?

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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 pointl,.o7pmdz ,cpw24p ky charge is -100 V. wl,pz p4d72ypm o,k.cWhat 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 sque c0ux*j,0is zbpujmnlx6; (;9di;yt j:m 2rv are 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 etbmjzv9(xunicyi *:,6;jrd m0;ex02 s j;lpuach 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 cenn35eh5)sjm 4t(bov gze6f mp2kp l7(c ter of a square is 3.0 V when a charge of +Q is located at one of the square's cornerkctpvjp eof5 lshng2((7z6b4)m 3me5 s. 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 charges f1y2v1u7 xjbf 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 islvw1/fi5, fo a 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 kk 2bmr3g6s* oidentical in every respect except that one has twice the plate area of the other. If tsbo3g*2km r6k he 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 capa)/ 9snx gyek7hcitance of C. If the area of the plates is doubled and the distance between t )7segn/kyhx9 he 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 fully and then is removed. Thxq-ki24ili 3k h8.laipfx 19 ee plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens lkfi9ixl-124p kae 8hqi x.3i 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 weakeneghered 09sn98*h: lt cd, the capacitance of t998egt lrhsh: 0n*ced hat 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 capacitor are maintained with 0nxi18w /p)funszs .tconstant voltage by a battery as they are pulled apart. )1 n zxts8uis./wf 0np 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+w:ckts- nb k( maintained with constant voltage by a battery as thw-+nkt sc( :kbey 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 materiy1i dwr.mr/k6al between the plates of a capacr 1iy 6/kwr.dmitor.
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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 betwe d+*:kfg.e8 ,awv skl7ac,a w3t4nigsen the plates of a capacitor. 4vdgka,w3ea,* s w:kagcsnf8+t.il7What 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 c/6e )dxc:i uy*3r(vos ju1z.h:ivjqs apacitor holding a fixed charge. What happens to the electric field between the pr (e:1zi h 6.vcy*iu/oqu3: jd) vxjsslates?

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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 connectedn3n z enissl31;j6b*ls faeti :;7:lj to a battery and becomes fully charged. The :llilts3sn :b;;nj6na 3*z fse 7jei1capacitor 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 of a capacitor holding a conspoekd,a)*iluf(j 9jlu *bd 9 6tant charge causes the energ k(eaoul9u *d) jfibdpj,*l96y 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 across a givebf fz 10 4(bwaw35hydmn capacitor causes the energy stored in that capy0zmfdfhwwb5a (31b 4acitor 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 k.g9;nap2evyzmh:gr9.t y- f charge from point A to point B. What is the potentialygk at-g 9p.fmevhz9 r y.;2n: difference 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 e6kg l2:oak vv cxlx1r;8iae/ 4lectron from point A, where the potential is -50 V, to point B, where the potentialkav4g:86;io 1/axcl xke2vrl 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 electi )9 rs)coe: x+(vclonric potential difference of 500 V. What is the kinetic energy of the proto) v9l rsec (nc:o)+ioxn?

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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 accelergc*6.p.o6j3 z v*; jffh0xvqokzca ,k ated through an electric potential difference of 500 V. What is the speed of the h,jj* c6 qk;cfgzz* .k ao.vxp3o06 fvproton?

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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. Wh8 ec7v0q+gtgy at speed does it acquirec+7te vg0qg8y ?

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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 9.0xwu+d nnlx7/ ) cy2-nl V 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 thr,2e5cyoknsmps( lr 8 k :siy,+ .rt7heough a potential difference of 500 V. What is the velocity of the electron mrnp k+ s7:i,y (o82 lyek5rss .,etchafterward?

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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 )ht:cv jp19pv20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the p v)v9pt:1 cjphotential 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(:kvkqq pu:iiv/3 a x st+8g*j the electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the plaxi+q :iq3su:vgpk8 ak*(/ jvttes?

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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, withoxm(whq7x0p me c7t /0 a magnitude of 500 V/m, is directed parallel to thmhoex0 70p /xmtq7c(we +x axis. If the 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 q*rs: 9jais(k the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1sk:jr *i(qsa9.0 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 t2qgled- muvwl2emz17)ie; i 9he direction of an electric field of magnitude 3.0 i97ll ue-;qe mgz d)ew2im21vV/m. What is 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, s6+i3 v c vz6n6.qbosnseparated by 0.20 m, 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 1.50 m from the positive plate, what is the potential difference bb z63vnc oiqn6s 6+sv.etween 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 conna-*sh3by ovh8ected to a 12-V battery. An electron released from rest at a location 0.10 m from yho*h v s83-bathe negative 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 xf)cmy-e d z-0pxqx9j5g*, e ja 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 posit0*x yf-5zqjjxm 9g,x-e) e dcpive 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 o0::itmlr56pa; ynwuuf 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 d;pawti:6yu l05 rmnu :irectly 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 7bfg7:8q khtfvoltage measured relative to ground at a given point in the field is 80 V, what is the voltagefgtb k f78q:7h 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 wtu)i qmg/a hg0+q1h5g j8c0 bwill acquire a kinetic energy (in the abs+5hqgqg j cit)0/ 0gubhwa1m8 ence 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 vl+-e4bha;3k spof8p nte m*.*jg;qaa distance 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 h* o mwv (drz/2asq -7ffhu;w8potential for the center of the qwr-s 7vzoafh*2hm8w(f u/;d 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,kgul*5e)+ 2mwzwn5 ,;porlr)2y dy k k 0). If the potential is t+r,w)lk wgd525o u2zkn r kp;*l y)eymaken 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 charge is at (3.0 m,jdt2 ide4-clqe. k k3: 0). If the potential is taken to be zero at infinity, what is the electric potentq -2t.j el4k:dk ei3cdial 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, 425pfxu7 fe5wxpbo0f0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taepp 5wu2 5bxx f0off74ken 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 charge +q are placed at the corners(,08pgz vcz7d g5pj dq of a rectangle of sides a and b. Wh8qpp gv (z70, c5gddzjat 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 f)maya tyji07vnhg,m6l2,s9 are placed in two diagonally opposite corners. In tlfn0 9ym)vay ,gm2t6ajih, s7he other two corners are placed charges of +3.0 mC and -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, ma nt:i)j4x 8txpss $6.64 \times 10^{-27} \; kg$) 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 7+ ny0e n.b6kn wm,cpato place three charges, each of 2.0 mC, at the corners of w. nn7by6+nk cm0pae,an equilateral 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 2iu+c ci83hh4jekn- (yd f. l-n.0-mF capacitor when it is charged to 100 Vk.ln(+ i-h c ufinhd4 -ecj38y?

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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 area4)mk: cai x xz7j 6drc(z:zt8a $0.50 \; m^{2}$ 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 separas;y8-x 4zluso sc)*n 37uh jzfted by 0.050 mm. If 7x-f4j yc l83zh) ouz n*sssu;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 plates of c.11; qzk iob92itad4qp-g uczi8g+s 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 gjle i6f. rmhq3ijs//d1nzr),b+ )f hs)qb .ucm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential,3rqe gijq)sd /hflhr6z, b ).1ufm+ ni/j)b.s 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 co2a2.qctv xzf; elb( *uc)ie ;fnnected across a 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 th)a2cu vl q c;.ff2(*z;iebt exe 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. Ho+zsl;qr5dm9 kb 16ax uw much energy is stored in thedl91z +bk5aq;sm xur6 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 j-/qo38g9md xc/j uw27uvxrv a 15 mF capacitor. What is the energy stored in the capacitor2vu9 xuq7jcw-x /vmdog3/jr8 ?

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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 zcan rbw0 0j+;onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done 0jnb0z;wa rc +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 charged so tm,e(ybo-o(x d hat 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 of,fqrn0wq-ga 3 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 of plates o f0wwky18 ex6z/. ipfsf 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 areaih3t:dq,i r u5 $1.5 \times 10^{-4} \; m^{2}$ 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 constructe+wljy :g:v4zi d 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 area n wu+f2g+,v-1swebng 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 c 5(9ql. zwrv a+v/qpgaonnected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely wzv9q+gq la5a( . /rvpfills 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 bec tiz7hm5ix1rg 6) qa,* ctvz6xomes fully charged. The battery is removed avh5zc6r t1, 6i*qg i7mxxa)ztnd 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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