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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 cat s61)ucgo 7(froaz)6yqa5?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombmb ,nm3qudjl 3:3kec) 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 h9 mzb, vn ewelr(b+*2surroundings. Object A has a net charge of excess el2b ( r,n9+w*zvhmbele ectrons. 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 )/ jewdj,)hxk:9f chxe mz.r)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 dwb( q+72uhz hc7m(lztirection 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 hollow conducting sphere. ay(oq;+xiw e +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 acceleratedxr cks *le/w71 from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the neesk17xw/ *cl rw 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 referreb5 :ju: jpf7kkd 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 to point B along an equipotential nj wx564 7gjeasurface. nxe6 a57wjgj4

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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 bn,gkm; wp)3p5gfm c 2ye

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy acquired byg 2acmj7c p:/bkk/ jo, a particle carrying a charge equal to that on the electron as a result of moving through a potential differen :jmc7apc jg/k,k/b2o ce 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*anwn jkv 1 35 qkuuj2i*eqd*1nas, 7h 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 cor, wtr56r4fqb2abt8jpi n *z0jresponds 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 distan / ykj nqg4f+vgs;i5-9axgt ,fmlgbi +g b(4h8ce of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point charg8y si(t -l 4f5i/qf4g9g h+j,kx;a ggbn vb+mge?

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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 powo 1(rapj9(noint charge is -100 V. What is the absolute potential 4.no a1(o(wp9jr0 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 t 4qhh y z:-mng)(o/n3, mxlj,zfng7qn he 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 n/g:,nm(jz-7 l fg3y4omn)hnx qq,hzis 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 squq50 utf pwxw+x)u-:h sare is 3.0 V when a charge of +Q is located at one of the square's corners. t)0:+ uwfx hsu5wxq- p 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 t;l*mm*wh(a(a ls 9l jh mbd06d w+kpf4wo 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 o gjxyq:w:.6 .7l/ap 8ylv3hm*b nduja

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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 are6gr(fox, f26 3 yowaoq identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacoqf2g r6x oy6a3o(wf,itance

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate caplm4ptc5m;j (w3 bpg411bzg dfacitor has a capacitance of C. If the area of the plates is doubled and the distance between the plates ispbf34 ;w4jg1t dgcm1 z5m(pbl 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-plabuq;pr euqbu(;f x 4:j, lip08te capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of chargeb;u(f8, p4 j:uqe;lbxupiqr0 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 a giq )qd(7:tsdvw7 jptp 0x (lw4sven capacitor is weakened, the capacitance of that capacitor:()4w7ptqvw j (ptsdl xs7d0q

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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-0iu)r )kgrt b8 -ord;bplate capacitor are maintained with constant voltage by a battery r bbdirt )o k)0r;8g-uas 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 constant vo.aid5hca0 tj +ltage by a battery as they are pulled apart. What happens t .c5iath0a+ djo 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 f-y kabs4ewxo ;0a4,uyor adding a dielectric material between the plates of a capacea 4ykxsyao ; 4u,w0b-itor.
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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 bp oe5uywvpfs,j1t; 1 1etween the plates of a capacitor. What happens to the capacitatue 1,j51of1wp ;pvy snce?

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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 a/nky 1 surq4l) jlx10as paper is placed between the plates of a capacitor holding a fixe1n r4yka)0 1qlxlu/jsd 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 bnh7l)cxhuizgw2s0r2): g o( recomes fully charged. The capacitor is then disconnected, and the separation between the plates is incrhh:rxigc7s l )(2ozgr0)2u w neased 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 .bzip96mdqfc a xn3*,capacitor holding a constant charge causes the energy stored in9*qcdimba.fx, zp36 n 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 acrf /b)b)n9gw cqoss a given capacitor causes the energy stored in that capaci/c wn) bfg9bq)tor 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 pn )+(bzbvkqo 2oint B. What is the potential difference between poinqb2)vb k(ozn+ ts 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 poinvb - q,f-j;*kkr:jrj tt A, where the potential is -50 V, to point B, where the potential is +50 V, *jkvt,jqk ;-b: -frrjis

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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 electric pot8lm-xc -y3 z9snxmz)t ential difference of 500 Vxt-cmzyx 8 )9sn m-zl3. 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 accelerated through an elec3 oo ypr7rw-6jyyz:8btric potential difference of 500 V. What is th -3r7oy:jyowp6ybr 8z e 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 prkei1w e28gd8 voton falls through a potential difference of 1200 V. What speed does 1e d8e8w2gkiv 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 do in l1txo:nyi 7 ph4/xzegnsj10 .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 electroc93sid0wgcp-v 0 hxo 0*jbl5cn is accelerated through a potential difference of 500 V. What is the velocitywc 3v 9 jio0hcp0s*5cdb0g-x l 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 of 20 mC. The object is accelerated from re309s/6i.a5zb qeus0 fwn5m kcuo4ck gst through a potential difference, a m4ab 5 ws6co.s05f/uk qkc3gie0z9u nnd afterward 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 mainm3jba) ed) zs6b57yxib+vih ;tains the electrical potential difference between two parallel metal plat 6s vyb)5 m3)e;hb+7zbadxi ijes 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 fieldgpoz8olwxbj rh s(6 292m;q9o vl.6hv, 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 6ooz(8v9h9hgrlvm2 pbql .xw6o; sj2, 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 to o6s:aknr.q *eward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point*6.o qns:kaer 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 alrt /+gyop(v :kong the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetp :k+ytg ro/v(ic 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, seb/rj+ +*x ez+n5 qpyjtparated 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 arrivr j+z/b +eyx+j *n5qptes 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, separalj8wm 6.ibh +l)dok va l.xo66ted 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 0.050 .lxl m) h+8wb6 vdj.kl 6aoio6m 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,1n 1 ry whdtrjk02/z2f;ur yw16++p:kdb h yaz 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 from11 kp 2n;whr2y 6kt dydrrf b1z/h+0:a jyzu+w 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 thetdvyje , d9*g, voltage measured relative to ground at a given point in the fie,* d 9dg,tvejyld 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. Id; 3z rw2ko va0v;;wgyf the voltage mz; wkva3g;wyvd 20;o reasured relative to ground at 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 differencefw;z: )te(jx 6 k-dlco;lcx9 s of 12 V, it will acquire a kineti);( 6wxld9 cfz: lje;to-ckxs c energy (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 3jc c9g q 2qw97 ps)7o8issooqat a 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 stic9 nywq; id9)jxk. Find the electrical potential for the center of the meter sti9j)yn wdqx;i 9ck.

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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-nr(wj/ ;hmbcul5fc - t5C charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potentia/h l 5(fbjw cm-ru;c5tl 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;lm+h uw0(ufv0fbt ;k m, 0). If the potential is taken tolf+k t;w 0;hfum(b0 uv be zero at infinity, what is the electric 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 is at (3.0 m, 0). If the pot9 -i4 cnzgo) pf1fyoy6ential is taken to be zero at yznigf1c9y )o p6 fo4-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 of a rectangle of sideh:wm vr5)+d yx/rd a;ps a and b.dyvxwarp/: ; m+d5hr) 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 qm 898uwh :5y3xgr0q ns1pcza 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 potential in the square's center?1pcqaqns890 :5 8wr zuhgx3ym

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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, mass w, 4c3vrtph d/$6.64 \times 10^{-27} \; kg$) 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 corng5v) 8lm49iu 0jz(sko/s m glver5m/ )k vsgz 9 su0jigvm(84llos of 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 2, b/,tf zsxr7+1 j;xbu6jotx s.0-mF capacitor when it is charged to 100 7 /u,1z6osb, t;rb xsx+ftjjxV?

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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 o . 8g0fq a.a /*o*rw0qxrgwxuxf 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*fufb a; haf* (8sbf6f+u 3vff is filled with air, and the plates are separated by 0.050 mm. If the capacitf*3u; usafff8*f vhbf 6f(a+b ance 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 k to)v7) -ik:j z:cbvxx.is :tarea $0.20 \; m^{2}$ 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 pocfams fe.m p 2o/ ht2i4kd9qzk3bd:)9tential difference between the plates is 2 zpsf:o22 )k4fet m/d i.qca9m39hkdb 000 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 is connected across a 100-V battery. After thqsg) 1 9b4gu. vq/j6f p0aci:ffy5oxre battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery,s/:06x )jyv.qg9fu fgrabi f co15pq4 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 in p55jasne 6fhh005yuu theahu5yfsup je 0n6505h 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 a 15 mF capacitor. What is the energ2aha3:f1fz 6 zz )ltglxm+ b(vy stored in the capacitor?hbag63t z+( flxf2) lm1a:z zv

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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(3cj.-nfhfsr v f ,/iz the plates of a capacitor when it is connected to a 12.0-V battery. How -, v fi/hzs .jnr3(fcfmuch 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 is charged so that it st ovm92flahp ,(ores $2.0 \times 10^{-3} \; J$ 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 consisnbvpwj26t9(d u-j g 5jts 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 of f g(g gv;gxjgz,b)8/g tw6+ klplates 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 n-x3li7mk e h3v6xwzbq2/h)rmq3g2u p b br1+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 w *gm3sp-t6 5uc3 wdwogc0.dbiith 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 constrxwkq u6lul9-;ucted 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*zkxy- acak( ( 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 ( c*(-zak yxkaa 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 andp 4lzib 818cf kp8;(;ingtkf z 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 5.0cz; i(pl8fk;b8 1p fi4t kz8gn, what is the voltage across the capacitor's plates after the slab is inserted?

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