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习题练习:Physics Unit17: Electric Potential



 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 isjwj;sh* ;pd) a 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 iszb(+)kto:8 5xepaq )hd2fb bt*h mp3r 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 insuaz0:n* qizihj zz,* h:lated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Whi0jhzqnia:h* z: ,zi *zch 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 iu0 o+dj 9 4gzyklr69ybehj7 :zn the 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 pu*y.4teh2yf hg.0c dn,g :yc 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 spx5 dm.tnkv0dh 7546 mnhizj/np t,lb2here. 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 potenymfje8.b sct9 x:;-g-j del .vtial difference. If the pomgjefs v;ycx8- t.:9bl j.e -dtential 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 tf7z 18s g4nwkqhe 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 fn68 cetlseo: 1rom point A to point B along an equipotential surface.cn8: ostle 16e

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surf7 ubij0-mjvp 4zcipi ;aa-x;8ace must 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:y qv0mq svf(wxl+)9c on the electron as a result of moving through a potential diffeqc (vyf+ mwl9:)sqxv0rence 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 issd 1an4y fg1i4 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 corresp(l x ;.ezq-xfaonds 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 point charka (5jjmgej)38 g mkp7 6arx;zge is 100 8 ;z)e57kxa gj3p m gja(jr6mkV. 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 potential at a distance of 2.0 m fr+ r0benc+ kp7m,o uc3com a negative point charge is -100 V. What is the absolute potential 4.0 m away from t,kouc0 c3 r+c7bnm pe+he 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 3.0 V when a. /w3ga;64fu6j 7n(aiexgh+iqk yo rz 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/ iggxe iu(yo6z a+74wnkfq.ha;3rj6 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 center of a square is 3.0 V when a charge of +Q 9t qv698vegzl/x .u6d1dvqu vi fxwd8d,z1o/ is located at one of the square's corners. What is the absolute potential at the square's couv8 dwu9q,./ izg1q l1xde9t fdz 6xv6vd8/v enter 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 c,us+ b sm: *bolj9eo9qharges 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 8,tvb95xrxl: jk qv7e is 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 res 89mn0rhbv4zt+a-f*sc e+qegpect except that one has twice the plate area of the other. If the smaller capacitor has cqn 80*s emrbeg c zht-+4fa+v9apacitance 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 plaql0: enek/i xe(dd(n)tes isqe(d( nn i0/)e de:klx doubled and 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-plate capacitor fully and then is 7sclpix ;u iugdkx4), 0key36removed. The plates are immediately pulled apkplkg;c3 0u )u7exyii 4xs,d 6art. (With the battery disconnected, the amount of charge 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 platebt66nzlmkbd 2 yyw . d4f4zx,* fl (:y+tzony8s of a given capacitor is weakened, the capacitadynbozy .l,y8wxm:z*nft26z+t 4k6f b 4d(ylnce of that 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 parall- 2d npba/o1wdel-plate capacitor are maintained with constant voltage by a bat- a2d b/pnodw1tery 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 ezsf; h/jz .e(constant voltage by a battery as they are pulled apart. What f;ej(. /zhes zhappens 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 dijfg,i 9h66x 8eacpd+ selectric material between the plates of a capacitor.d69hi6 ej+, fgpaxc8 s
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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 between the tfn,,s77 9yzo/ wmkha plates of a capacitor. Wha97k7, zwafn ,ht smo/yt 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 materialce 4 lyl. u7k65mwm)dh such as paper is placed between the plates of a capacitor holding a fixec5u4 h)wkm.7le6md lyd charge. 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 is connected to a battery and becomes fupn s (fp 5jk 52pz7q2bajzhej8- o4g0fkg- x;glly charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way t2- gp7g(8k jq2e;pjpa gs- jxn50 hfo fzb45kzhat 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 hdxzk . r6m.-/e ti/mrkolding a constant charge causes the energy stored in that capa rk-iz.k /6x. m/mredtcitor 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 ary9 p76h+qni3,ppox -,srd -wivzct. given capacitor causes the energy stored in that capacitor toii 7rwr,zqdyp s +v ncx,o3h 9.6-ppt-

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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 f 5g4xtkbt*:o o(-ns mxe- zt3crom point A to point B. What is the potegtt oc4 keno-t 5-:x(*sbz3x mntial 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 electron from point A, where tt.cyb(n f2zoc4p*/2q,w y k lghe potential is -50 V, to o bnc2,*( zkypg fw2clt4/y.q 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 *jlthp( ,pcts)x3dr/ through an electric potential difference of 50jxlspch)/p t ,3rtd(*0 V. 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, is accelerad+;*w w / qyhy+;beoxated through an electric potential difference of 500 V. What is the speed of the +*;w+bqd xo yahw;/eyproton?

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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 1u1dc*6vcz7 24os fh oi200 V. What speed does i s *ohicf761dc4u2zvot 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 do1,d9sigkfg1)p i 2pjmav90 nmcg9(xo 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 differenf 6 lnue8l2,osce of 500 V. What is theu l6s,eo2fl8 n 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 ofvk3h2d8i) g iu 20 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 mag2gkd i)v3iuh 8nitude 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 potentiac apq 2u g87qmy :6uixy pzx*)p/xak79l difference between two parallelp8p2cx9k7 : qx*/z)m6i qga7a uypxuy metal plates separated by 1.0 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 500 V/m, is directed3ejh+mg p w+6s parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potesg 6+ehp3m +jwntial 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 f0:byldz y0vk *kz ha 3o3).zxgield of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly west of thaz0kzdvo:g*y l3xb0z. 3h ky)at 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 m8 6otwp a;4a9;gvpi30:t h unjlokru)agnitude 3.0 V/m. What is the change in kinetlov tu)38a;ajrw: p ko4p;uht0g 96inic 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 connectedt84(at:vtr e y68rjy m0sh5vz 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 pos m540r( hztras8tv vj 6yy:8etitive 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-V battery.mtlcq917d e9j0ti hqy3sxnt oj361k/ An electro c3 y/ 9lx1nhsjt7 3qoqj6dmk9i1t0etn 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 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 1mm a(1:dkt;e-uy hk p6b jdg47wy,ou)2-V battery. An electron released from rest at a location 0.10 m from the negativ hm 4ut (j6p-mkd1a)k;,bwdu7yyg o :ee 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/C directed toward the east. If the v :vx))v;*hmo5fc gp sluy,uk7 oltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.0 m directlyg*)ly :;v)xcupu,k7 hsmv 5f o 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 direct.rk k-) k mh**cpmt -4i4ymzufed toward the east. If the voltage measured relative to ground at a given point in the field is 8c*.rm4pmf ) m*-kkz-4yktiu h0 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 differe9f1 / eoyw0gfxnce of 12 V, it will acquire a kinetic energy (in the /f19x0wy fg oeabsence 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 ofm( xs/drdzx)a8qi qz.h1t. 7i $5.0 \times 10^{-10} \; m$ 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. 9t0k zai1h6qcFind the electrical potential for the centakt 6hcqzi190er 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 5u7foxsc (x,uu*y hj (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 at poix,xyoc(u5 7*hjus( fu nt (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, 0). If the p:j/lmmi+mkh r qtg8x k9vf (,-bu.v;uotential is taken to be zero at infinity, what is the electric potential energybu,( h.jgk:imlfkvmvm/;x - 89rt+uq 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 re :;63dsss ou(0, 0) 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 work required to bring a 1.0-nC cusss ;3r:d6e oharge 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 rectangle of siy xz cgf8et9 c2p zk/j/;yf+c1des a and b. What is the potential at the center of the rectangle ik1czg2/y yfj/ xp 8;9+tfcczef 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 0b8w 4iiau0gxch1 gt y/pd9b9of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges g1 b 9ug x4 hbdi8tyi09ca0/wpof +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, massbyuu .w kz5+1x4qjvq; $6.64 \times 10^{-27} \; kg$) 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 m;x-z8 jdkka /oC, at the corners of anzkk8a-; xodj/ 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 o(z dowg8. ymj5;ci3 u d4udeg+n the plates of a 2.0-mF capacitor when it is charged to 100 uig u yczm3je g(;4d5o8+.ddw 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 capactnx 5o-m u;qc8g 4mjt *8neg8sitor has 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 rw*zd+2blm4 8t qup9oyive5:air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, ou85*:eq wpy2m 9+zi trdblv 4what 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 hjctc5jx5hn6 *as 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 of 5.0 cm. If the po-3tsyq ivb1 5-z9 p t3emp7vqztential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between thqt v z3mbt93ve-71syziq5 pp- e 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 battm9y 6wskr(c0qe0h ,djbuoq.+ery. 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 batter6(jy90k.c+bqu0o r,mw e h sdqy, 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 storedxd8 wr5dcc brgdxnsg0)38 v;; in the cadvn3 xcc ;r xb)s8r;8wg d0gd5pacitor?

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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 capad4eoi6o0fgfdj s- 8fz)q: uy:citor. What is the energy stored in the capacitofyg)4fjsf:d-z8 d i:q6 uo 0eor?

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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 connec)pmi g8n2x/9cq-8a8ghcrs k fted to a 12.0-V battery. How much work was done in charging this x maf8c qc 2rg-p8g/)ni 9h8kscapacitor?

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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 ch uo -vb0iy9kj-xo20guarged 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 of platt ei);btf b,9 q as(owhso;+2ees 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 consis8e9i ub41)iptzi h a5its 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 g a 1q8v1zclu7emx /nvi8-7 lyarea $1.5 \times 10^{-4} \; m^{2}$ 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 capacito fjsn t/; .7nxiquw75jr is 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 capacitor is constructed withelmrkzpr 806wm )m4 ibc 8).ey 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 connecb17t.mc:vtn6 a) t5lefja+bm ted to a 50-V battery and becomes fully charged. The battery is removed and a smn.5 fca71t6tm:ale)b+j bvt lab 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 oazn dw*t87*j 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, what is the voltage across thnzw t7jod*a8*e capacitor's plates after the slab is inserted?

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