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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?fqtt-ez8k740r t, pris:d2 k.tl)qct

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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 is aq./,gc jvt/l r.ujj,. fbx s2r

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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. Object ixi4h,s 7v ,)i m /u6qj3htv5e*zgudaA has a net charge of excess eleu/7 q,v iz56t3sai)ejig u v*h4 ,mxdhctrons. 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 elec2i si 0/j psg8ted;ri:tric 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 bjv 70yap:, iuelectric 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 cot(gjz27u*g/t7 j:x -9zn zqxngipgp fyb. 3)inducting 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 accelerated from rest to a speed v by a 500 V potential /ymndm2 (xn k3l 3q1otdifference. If the potential difference is changed to 2000 V, what will the new speed of the balnxk3qo2y(n /m13 tldm l 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 po*1l 0hqz3c xg)l3a+x8d ei fgpints are at the 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 point A to point Bu i/(x xvsb6g: along an equipotential surfac6svu/:ibx g (xe.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mqvx4x3o;s+h d ust 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 tta,.h i*b g5cphat on the electron as a resul.p a5t gcbh,i*t 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 oq2 6 qsgzd-1on76htd1az si.ff

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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-v rmy+j;. yft2wjrc:onds 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 fkznkk sb5y4vd:b) 72d; ky5s point charge is 100 V. ysd;bb5:)7ny k zkv4k5f2 skdWhat 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 3-.jmb l(zagbm from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point zb3m lb(.g ja-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 a rop 50vl)app*xt6rxao) 4jf,t 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 p0,tpjrovl* xp f654aap)o) r xotential at the square'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 the center of a squaredpknoyud .jw*ilh b9 69o7yj q2*5u1 j is 3.0 V when a charge of +Q is locat*uud*jj5 d6. k jbo y19w2ohq pln9y7ied at one 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 two charges thatxlkr6.whna .u;bsa8-b + 7jzk 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 iofxa ;34 r1gvus 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 identic:i0i9 .di7zlijwuh22 rwxydc 7emh6;al in every respect except that one has twice the j 7wy2.c:rh dxli ihd9um76ew0 2i;izplate area of 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 capa (qpp w(e,l ca9yz8+cocitor has a capacitance of C. If the area of the plates is doubled pa q(9o8l w+,cczepy( 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 fler/jn*9ju5 l)j9gq e ully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on)rjl9en*j/5ug9el jq 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 given capacits7c/ h3;.rxzf3fbc eqor is weakened, the capacitae3c;zhfc 7 .rx/3qs bfnce 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 parallel-plate capazbo-8s fwgsp8 b:b6-a citor are maintained with constant voltage by a battery a b8 bgf6os -bw8spz-a:s 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-plavu b,lg7 df.w8te capacitor are maintained with constant voltage by 7. 8fw,vl bgdua battery as they 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 dielectrh7493h02gjk 7j kboy v nukqa-ic material between the plates of a capacitor.uhk j-vay 4okq 97bj2gh k703n
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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 between0b r q h+kv2hg41lg9nv the plates of a capacitor. What happens to the capqv9rvkghh24l0g b1n+acitance?

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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 capaci6(ulqnf5 :h hdtor holding a fixed (h 5nduhl6fq :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 battewv7 hc, h6m:tery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The eneht e7,m wh:cv6rgy 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 a0x0 bcde,o qv/ constant charge causes the energy storeexcbo q0/,0vdd 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 cauzcgs* 1hz8p v 7 mr(/h*qmb)dtses the energy stored in that capav*htmr bzc p71 mhsdz)8qg/(* citor 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 point B. W,ih8/:hqaf;m 9i4i5g joa u jchat is the potentialg/,jaho5:iji4 9; ciahqfm 8u 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 :hm i2teu2j;kcz6yp, from point A, where the potential is -50 V, to point B, where the potential is mj2h :ty6pzce;,2u ik+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 electtfx,nk) s7 s5pvs+ o6uric potential difference of 500 V. What, vnfskp6xso)t + s75u 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 electric potential di1g9h2gdw;:;c du g/zounh cs; fference ;z:;sc/hc;9d gougu2n h 1 dwgof 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 falls through a potential difference zz4o8a9)yymkz-3cs-/ iivymb 3b m1yof 1200 V. What speed doesc3 viza-8ms -y/3zb) zy imyo9yb4m1k 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 m:imnh11 mf1ck 32btxaoving $8.5 \times 10^{18} \; electrons$?

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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 oxze d,+ki- w 9lxcnl48f 500 V. What is the velocity of tcx9,lex-8 +zdi lk4 wnhe 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 obov +v5 y*8nefo( vf0dwject is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. Whod* fvon8v5 e +v(0wfyat 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 maintains the electrical potw.a saad6630spjmd y -ential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between apysdj0s3 66wdama.-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 directed parallel c8t 3udh1v*rlto the +x axis. If the potenlvdtr 8hc1 *3utial 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 audf;4n8 jy v,the east. If the voltage measured relative to ground at a given point is 80 V, what is tay u,d;jnf 4v8he 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 fieldr+g+xga+ql le9 ,3/hq zv dm6cez6 v6p of magnitude 3.0 V/m. What is the xc+dga3+ qgp9z 6/6hevvr,+lzq6 e lmchange 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 a 12-Vpe0 o8rdvvf+agn- 2n( 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 pos2(r+pfv-g8 nona v0d eitive 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 battery4rr/t ww2qry z1xe3m 5. An elxw2 mwtqr r1y43re5z/ectron 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 12-V battedetrk 3j0 q+5ury. An electron released from rest at a location 0.10 m +5tek uj 03rqdfrom 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 50 N/C directed toward thh7j 2 cvbc2 s2vp y-.a hoj*wuxvc83p)e 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 directly east of the po) 3 xp8v2h c-jc2.2bw ypjusvcav*o7h int?

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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 bv o6y)7mp ,ejdirected toward the east. If the voltage measured relative to ground at a given point in the field is y v7)bj,oep6m80 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 potentiax8j -za 5 )jubvjgz8h9h)3 k0nhhnk)vl difference of 12 V, it will acquire a kinetic energy (in the absa0hvvkn358 )h9hj8 zkug hz)j)b-jnx 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 7gs 9 vre:jjifr 89wxpg,n-l kvoc ,f8gd*+(vat 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 stick. pxt13b+ms4n l Find the electrical potentialn1lt3 +pmxsb4 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, 0os6 6re:x 3of ,qin3gu). If the potential ixrs3:g6euqfnoi o6 3 ,s taken 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 (3nj y-1bzt-6t1bce a o8.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at poe-b6tny 11o 8zjbc-taint (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). dm)+9i8i2i du)e6 ojegzdb (o If the potential is taken to be zero at infinity, whatd( )d+8o2oe iium d)z69 bijeg 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 rectangg:36lojdhx3(89.wcvfxpx mg le of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mcfhmxvw:xo.j 9 83pd3g(6 lgxC, 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. C1j29.m h-dgcj syy cr5harges of +4.0 mC are 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 cjr dmc. -yysg92hc1 5jenter?

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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-we: jvdu y1)rdr/o xdk 8gt3tg9 -ld/ +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 three charges, each of 2.0 mC, at thiq* ;hsdb.a 9- dz+el9a tmfl4*if,cee corners of an equilateral a- zcfef4+t9diilqm d*ahle,b.s*9; 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 2.0-mF capat73 zn s9adq/kcitor when it is charged to 100 V7kz tq9 dasn3/?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capa;dc8tbjgs 45(gv-. qdi k0ntv citor 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 capaci/kb3l6n 4chy6hwd, yztor is filled with air, and the plates are separated by 0.050 mm. If the capacitanc c k/46nd bz63hywh,lye 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 platth 1e.)/s q /pxvh v/33occckpes 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 potentab/2sa3p f /hag;p ok6ial difference between the plates is 2000 V, with the top plate at the higher af2/o3a bg/s 6hpa kp;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-owkgz, z b0od/qr /-i a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additionaz- gbr ik/,zod-o0/qwl 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 ,6ic55io x,eu-9lv ilmzp*plmuch energy is stored in the capacitor? i6plvol9ux5- 5 lz ,ii*mep,c

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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 capaciamo -e3(/lxb weyg2 t53zrbs8mw 8xp9tor. What is the energy stored in the capacit omxz3e9 -g/mtxwbb8(r5awp ys23 8 leor?

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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 caz9ih:bhi mo :a; oqm::pacitor when it is connected to a 12.0-V battery. How much work was done in chargingqoaz9;:hhm:bm:: oi i 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 s3rza*:rngr-xh 4k:y n+:zg+1duf qh uo 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 cons/p +grgd n+4mf+hw fv)ists 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 plates orr.u( d) /8tgjcxhvb 5f 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 plat/*c,uekdvuol p 1w:*9kttk0d es 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 construcjj: bt14v vh1cted 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 c+yb,jg z75 g.l nuox+wonstructed 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 and becomes5xe f9ew;(r-eod aef knyw+ 1/ 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 capacitanr9e - efa5;1wk +w( ee/ndxfyoce 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 andz+pknnq ux- vu61y(v, 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 haqyvpxv un+k z6-u1,(ns a dielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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