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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 vectk;iatl +idnm3m-f 7:zor?

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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 i80z)k6 bcarxkh goq9o4s)e2k s 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 areeo5a5+n9kw+ :wquoy)ykw ui+ insulated from their surroundings. Object A has a net charge of excess electy+ue 5uy wik)o :w ++wqo9nak5rons. 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 dires5)/cx0mcfg* mrwyd3n/y kz9 wu *pu5ction 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 dir+lp7)fa9rj4 lopz2 jurv kz99ection 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. Toosu 64+ 7sw;xghu 2snhey

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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 speedf*(gj 9xzb2t .tmn2rdqy, f ce ,ze9.xifx *0k v by a 500 V potential difference. If the potential .g*tnrexf 2q,xc2z9, yf9kfz(e xm.*d 0 btjidifference 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 pointyn 48yf;y92pd 0wvu ox7j kzr2s 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 B along an equipotentlkpp;r2o69u,pa6 ; f:vcyxs jial surfac ,pcr:kj;axp y;suf6 26 9lopve.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surgh fp *(ugp o)uv8ww9:face 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 nj0/ w2pjbw7icarrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is referrewbin 2wj p70j/d 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 c ) 3rn;1jtjcnj, b6yqm u1o/ha 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 correspog3k f)iu55r4e8v yjcii )6ug i cwzj(-nds 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 frr+ j/tykr ag5s 9xe5vi5tid +/om a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point cht e9gid sri/55+5 kvjtr/y+ axarge?

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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 point cmqkq) j*jw+r1w /khf ;harge is -100 V. What is the absolute potentiaqj;kjh r+ fm1w )q/kw*l 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 cen c6qfw/nzr8w exn 85s4ter 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 atqcn8 ww56zrxs/4 en8f 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 square is 3.0 V when o-yf 4vjfzl qb/7iq/:1pi pp0a charge of +Q is located at one of the square's corners. What is the absolute potentialq40i py oqf/fzp :/-7vj1ilpb 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 th49r6ft a4rz v -,gjkmvat 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 isz9oo,py2g 6ggxkqk kupb1 liuo0m)/i .66n8x 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 thaad09z r* d*xe2vk3uajt one has 9jexa 32*u dad0rv*kztwice the plate 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 capacitor has a capacitance of C. If the area of the plaf5pm5dqv;:v.yf cwi9a zb( k( tes is doubled and the distance between the pd fbmyk(vz 5acq(:5fi9 w; p.vlates 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 paralle :l7io+utk0qvxk+bm )yn m2p l.n1p)wl-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amountv.b21:i w0)p kqklpml)+nm7 n+uoxy t 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 plates of a given capacitor is weakened, w4z.q z9un3l3mx,0mf xu jajcv4 +j2hthe capacitance of that capacituj9 czxna.ml33 m0 jw4+hf ,uxjvq24 zor

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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 maa33)fd.d 8i 9lqsgae qintained with constant voltage by a battery as they are pulled apart. During this process, the amount of char9i8 )d3dqga 3qlsafe. ge 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 volquu* m/n h5a:jtage by a battery as they are pulled apart. :umaq*/5ujn h 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 dielec9. d1wfbxp,o ktric material between the plates of a capacit1k,dpo.b wx 9for.
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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 plates ta, lk,6otsaik78 9 ghof a capacitor. What happens to the capacitanckt h a,8ks oi,9t6lag7e?

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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 i0xiero6 f /z:of a capacitor holding a fixed charge. What happens to th/0:fr ii6o zexe 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 fuk(cm7 knez.;9dvd2 hmlly charged. The capacitor is then disconnected, and the separzc2v.7n;h e9( mkmd dkation 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 causes the ezy-24 cv ym 7wm j9pai2w13arvnermw2493 1y 7mi2rpvjz -wyacavgy 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 given capacitor causes thkaa za53kdp y b,3zvfa6v7 yv: -p-hh;e energy stored in that capacitor t6 7bzkavky-53yfazv p h:h3,p;ad v-a o

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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. What iss5 6p-t5u3-q;wdq fhblag r+ s the potential difference bql+5fa-u;t-bw 65ghqp sr 3dsetween 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 the potentia )/vi-p z1g f 7;fnz.9ns1 o9vpkmuysxl is -50 V, to point B, where v f yizkof9. 9s)p m- 7/11nsgpvnuxz;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 accgi):i3v iaepmvvj1-w2lpee 55id )p, elerated through an electric potential difference of 500 V. What is the kinetic energy of the proton?ipa )-e p 5imiv1le)vwjpdv:, 3ge 5i2

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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 throug,+jv1va5j6 amql n x-yh an electric potential difference xa n6y- a+5vq1lmj vj,of 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 thrxu+b)5nv5q z aosvgq;w8(nm8ough a potential difference of 1200 V. What speed does it g5onamzw;+) vxqnbs8(8uq 5v 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)7r30jbz :jpq wa4sr a.0 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 through a potential1,b.+ 6a bgg0 l:uepxb dvqkb;s(1uxk difference of 500 V. What is the vel6bugbg ku. (;x 0eq adv+p 1x:b1,lksbocity 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 a2lc15pmpfqt3 es0.91lb ev cq charge of 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 magnitcpp5. c t 0lel q211vfqb9e3msude 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 potential difference between two;n. )e 0q3s,q nqg/mv ce6whgm parallel metal plates separmcq3sqqv m). /6,0n egnew h;gated 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 )pq/fsoeg4n f 3 wnk-i:/h1(qk tuwp*500 V/m, is directed parallel to the +x axis. If ts kn/(/poww-q3tk*:f n 1 ui)he4 pqgfhe 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 the east.4ty1f.xsxl. c1: *zgyunrpr x qd20o.o ;r8en If the vol z2 x 0.t:1 xropg.rq84oln;r1 xcnyue.f*ydstage measured relative to ground 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 direction of an electric field of magnitude 3.s5 -wlxj eypm*opg 1)90 V/m. What is 1pj9 mgs x)y5pw-lo e*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, separated by 0.20 m, are connected to a 12e udk 82(py1f*x:sq2ecptu7 w-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 plfes(wqpt:ed7*x8u 1 kupy22cate, 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 batterv+.qw dql 7h 2-(mamn9x*yw mhy. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0+m9-h y wm.a hqvx 7qw(2lnd*m.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 batte6j-pu.8e2f.cspw e6a lt5paty 77az lry. An electron released from rest at a locattuy .fa-jp2 8etaae.pcw7l 7zp s l566ion 0.10 m from 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 djy, bc0t1+j fjhy7,atirected toward the east. If the voltage measured relative to ground a, t hct0 jy+fby1,7jjat 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 th v4my w15(n/eav1u rale east. If the voltage measured relative to ground at a given point in the field is 80 V, wha415 n/1ayre(v vlam uwt 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 difference of 12 V, ip*mh el ti/9g7t will acquire a kinetic energy (in the abse9/* etg mpi7lhnce 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 b/+p/df l.eoc 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 an;sshhmdw z(hb -34q 3k57.-e vmbaxnre at the ends of a meter stick. Find the electrical potential for the ce3;s(k -b am4 swb53n z7qdnvh- .hxhmenter 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 atl. b5f:uyb9 i5oimk.u (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken toui 5 l:.by9 kmb5.iufo 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 cha f1htg ld85yzk4fx6 ,jzqw,c:o.ie g+ rge is at (3.0 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 point (0, w1g :8ti5 gfz +fx6klz,ho4dec qj,y. 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 ar q/o6if qn4r t;q,q4ot (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 charge fn4o/r o 6itqr4qqfq;, rom 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 d:.:is flcn*rkdb 09da rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.0bc0f* :9 nrdis.kld d: 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 placed in two d8d k.odbt4payaj rv.j,wc5z:)8i b t7 iagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute poten:..bv4,8okt8p) t 5 acjj adyr 7bidzwtial 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 (chargw*e) o)w8tcypwg+r i *e +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 the coror 4e3 hlgb9(sners of an equilateral triangle of side 2.0ghbeos 4 rl39( 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 +j+a b2olfjqyzg 4b7out0/m .a 2.0-mF capacitor when it is charged to 10. bz tj/olg42 mb7a+0fo+j quy0 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 capachi be7,ffl.a9itor 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 air, and the plates af+jr *ei3zvf( wn x36hre separated by 0.050 mm. If 6z j ffnie+h3rw3(xv* 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 capacitdqycim ,s g sv,9 vr:cys+7 qfp)+6kr.or has 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 a)w14g p x1anb5.0 cm. If the potential difxwbp 411)aganference between 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;o*c bd6zh3duk g/ .u pijl3o: is connected 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 chaj.:; d*zp uld 63 3hk/goobucirge 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 ao zdo/dt.nc8xh:2 k4on a 15 mF capacitor. How much energy is stored in the capacitorn z8.h/o4:ka 2ocdtxd?

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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 energy stored idt l*98ke td3wn the capaci* 93lw 8ettkddtor?

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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 itk9y9egl.z7 l+t-q hua is connected to a 12.0-V battery. How much work was don-eql7gt. +uz hy lk99ae 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(y z7yr18 f dj.8okq1y+ hdokiores $2.0 \times 10^{-3} \; J$ 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 5uzb r-gib wbo0w1 +yf( :zne: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 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 of area 2v6px: k;sfqndz-s c4 ,ql0 uw,v v0ux$1.5 \times 10^{-4} \; m^{2}$ 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 area:d2 d ofl4yp9y*9 sp9 n4zqspc $1.5 \times 10^{-4} \; m^{2}$ 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 wi+hs k9w xt 5zz*:y4vukjyo25ith 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 my 36 qf 9 etzvp/,.rn8q,iovfbms 42xconstructed 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 tod, 9y rwg upzs+-:qb0y5cde2g 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. Ify ,g sqw :zp+g dr9u-b02eycd5 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 pbz d0t)3d *dje/f)opa 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 the capacitor's pla3 ftb/ppzd)odde* 0) jtes after the slab is inserted?

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