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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 vecfnv t9iyww4qh3+fk; ,tor?

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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 xnxb bu-0q;go+ 1f+sris 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,y6g mp -aiw+v surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which objec+ v-ip,mw 6gyat 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 ele wp2/5 wdxso k((2ekgectric 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 movi)paxg .ej+ot(h)sy23 a5 k24t gxdecbng in a direction 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 conductifk3szo8isn,ub e -i5- ng 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 accetlw d q2usm4qz:: ktgyce9 053lerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speedegs 0y2dcm:qw:q ku z5tl4 t39 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 poins(;9y x/ o5elpw/htcf1 nm/cyts 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 p f37xq ,gtf o*mkrtw,mk-0wn8oint A to point B along an equipotential surface.- 7m,qrmowgn xkkwtf*tf 03 ,8

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfacen7bi6 -x2 whpf 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 on tdz4yhd .i7; cr(bf.s bhe electron as a result of moving through a potential difference of one volt is referred 74ds d(.ybrc. ;hzib fto 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 tr8)3 y:ufg4-8o hcmeaw3koy 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 correcv+;pullr z6xgn7. 3mo-q g9msponds 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 dista9usrat.w i i9)nce of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away fiu arw9.s9t )irom 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 from a negative point.b,vzz cymy1/ charge is -100 V. What is the absolute potential 4.0 m away from the same pointv.m cbzy1z ,/y 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 isfj/;jaa m)/rm 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 othermrfa;)ma jj/ / 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 whv8jigb+z) 3y i9hwro( en a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when iy3 b9 rwhgi8)jo (zv+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 that v:2jyto-n kz4 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 voltv()c;anb/ h gi 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 respect except that one hasv) fjj-gz b7t+ twice the plate area o7)fjg -ztb+jvf 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 ofw,ithf )tp rp 2y:q27i the plates is dot y,p7rfh:2iqi)2 tp wubled 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 capacn;2e3 ri 5yb; ug9qqyqzgr7j( itor fully and then is removed. The plates are immediately pulled apart. (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 q 72qzqggy5b u9r e;iy; rjn(3being 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 betwe89n 8jv,tnpw oen the plates of a given capacitor is weakened, the capacitancew8 n98,nvpjot 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 capacitor are maintained with constantzpd5i4c 1gnw(:e(f ap voltage by a battery as they a1egnfi p45( (z:cpdaw re 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 cape(bz(r y1 1uvs7rg;oyacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to(r ysvuz1( 7;g 1beryo 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 material between the plates of a . solen*-fse*capa*e-n *.lessfo citor.
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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 d-fv(pa *b/pottx -f ;t95it zthe plates of a capacitor. What happens to tpvo9 i*-t;-a5f /ttxbdfz(pthe 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 iswnmbk7w vo* m oij+t.o)si1r7)2k+zov*m b0k placed between the plates of a capacitor hol)z71kv.)0v+ 2 mboimsi m bw+*nkok jo*ow7rtding a fixed 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 fully c58l7ci 4r)rcfurg( 3n,uzcv l harged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The enn5rfli7u( zvr3 l)8cc,ruc 4gergy 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 chargf ehd3j+md6yuih.bdeb-8sh 8/-/abs e causes the energy storembhd 3 /e/ fh68+ash -s.byjue -dbi8dd 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 givetvr,lm :4e2vo+5sh jn;mm ar;n capacitor causes the energy stored in that capacitor tomovar;; +me lt4r,5jh nm:2sv

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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 mj906 ihuf6e b( g8wqbwed c2z+ove 10 C of charge from point A to point B. What is the potential difference between point 0+eqb gbzcf(h6uiedw9j28w 6 s 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 potentddqrk)vab;yxvb**;5wt3 vz 7 ial is -50 dy wz5ra*q; v k*;b t3)vd7bxvV, to 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 accel kmbp gnvhrii399519 oerated through an electric potential difference of 500 V. What 9rkiminp9b 3 h5 91gvois 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 potentwy4z(j7)m wsk7 k3 w1zqo;h nbial difference of 500 V. What is the speed y) m hws;zkq7wjbw7 3okzn 14(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 mhssx o)l bq(q)t0kj( q+,v)hthrough a potential difference of 1200 V. What speed does it acqkstoqm)sh (j0l h,v+x(q) bq)uire?

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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 moving j1o -:yrylt 0koy-tf7 $8.5 \times 10^{18} \; electrons$?

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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 of 500 V. 2ns+-npo o,gl wy; 2zuWhat is the velocity of thw;22z,u ny - olgpn+ose 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 e muzlc ;3z**ymC. The object is accelerated from rest through a potential difference, and afterward the ball is mo*e uzyc*lm3 z;ving 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 maintains the electrical potential difference between two pana oz z1i q)/g +oy.i6jesa+b7rallel metal plates separated by 1.0 mm. What is /+n7zjgeio1 b6zay q).+ao si 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 dirdam t-h:32, p acjw*dnlhr68e5mr6c qected parallel to the +x axis. dlc* mh5t8h :-r 3drq,em6w jpan26ca 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 tphjt;)h4(3+ x vsphz 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)p4pxt;htz v+j (3hhs 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 directio1-*qqr8; c9gb f cn. 8nuhwyvy;lcty)n of an electric field of magnitude 3.0 V/m. What is the chan .hrfw cyql-v nug;8cy 81yb9c; tq*)nge 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 12nd4s 1 gx ;8ny6mjdsbno(2c n--V battery. An electron released from rest at a lons-dxnscb; yn6(j8m o 214 dgncation 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 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. Aan+sb x xzetm,m8 v3949dr1znn electron released from rest at a 94n +,ad1ztvxznmxr98bes m 3location 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 *oi7zdbh tx u: 5 4kvj6lp:b;am, are connected to a 12-V battery. An electrona*kl6b ;b:iuth 45jvpx7zd:o 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, 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. 8,.ifw u5vrc0hrszh 3If the voltage measured relative tu. rc 38,hrvw0fshi5 zo 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 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 fielpv. j9u2pcqye m 2-+ mzcs(whrg,qt*7d of 50 N/C directed toward the east. If the voltage measured relative to ground at a given p j 7y2h-*mp92c.+ gwqvpe,stczmr q (uoint 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 potentiayx/ 7b bb7f5uzh m8e-al difference of 12 V, it will acquire a kinetic energy (in x bz785u7fh/e y-abmbthe 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 at aequs,ow3m55y.6c .)ovx vep ioi-u z dn 4t,.c 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 thf- /aq/v0vm kse ends of a meter stick. Find the electrical potential for the censv0//qv-a mkf ter 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, 0). If the p2k tvinc q43.q 6 .6-patcdjiuotential is taken to be zero at infinity, what is the electric potential at point (0,6i tdcc jq43-.v u i.pt26qkan 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 -2r 9cw k(7em1pq.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potenti9w7qmp1 reck(al 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 k cn4jl7lt0ms81rytxgr0e6 :(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 charge from infinity to point (40mlrxj 8lt 6gc10ne:skyt 7r0, 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 sicupe487blzc-9 cq3bn des a and b. What is the potentibe37cq pc lc8b9u4- nzal 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 bvqyg cg;:sx6j*e 05e placed in two diagonally op5e:jcv6;bqg ge*xy s0 posite 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?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An alpha particle (c3 .grvfysf; t6cu5d3 v6t eok wv5(4yrharge +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, atenfn-kwg *(7 zrh )1 bxyjwq9- the corners of an equilateral triangle of*f) b9j1-eq-nhwxgzrn7 y(kw 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 cjg7a*vuc(fu 9apacitor when it is charged to 100 V?7uug v9(fac *j

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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 are/w bmyev)+qwjyoa 8+f, zw 8v;a $0.50 \; m^{2}$ 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 isn s0 jdd8dtj r, zv2)q7sg)n9s filled with air, and the plates are separated by 0.050 mm. If the capacitrsnj sd)v7 9ndjg2,st8 )0zd qance 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 capags9e0vizn:( acitor 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 5.dpk1)i xj 2 c)zh*1qzy0 cm. If the potential difference between the plates is 2000 V, with the top plate at c1h)1j *)dkyix2pzzq 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 conne0bqdcf:( v*q bcted across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectrbvqcf *d b:q(0ic constant = 4.5). How much additional 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 much energy is s)a5j-i u0bypg:-a frt tored in the capacig)-f0 y5a t- bi:rapujtor?

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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 store;14 jz,yrfdwj0 /* fs.qfvn krd in the capacrk1rnv wy.s0z f4,fqf/j*d ;jitor?

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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 o( k(i q)fy lzo4)l7v i;i*mfecf a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capacitor?ol qii f li;cme4y7(kz)vf(*)

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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 chjoic* n(sor kig +6+x/arged 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 plates 0gzp se.y; (:qs os,yn5. bvxbof 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 i(3 d-/uxbk,nh- l6opzw s)awof 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 platescwzzlr *op 4i/s3pkefgdzd:n : -2-(xt m7l1k 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 with plate areak 59qiso manm2 w)0.;h7kdggr 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 construct t;1 hb/qcmw r9uk3gy-ed 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 become 6ych22ga 8l6 f02lugaybugr 5s 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 5.0,62l bgyyfr5u0ah6cg2l a2 u8g 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 oq f9x* xqcnx5-2bf .nqb7wv650-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the bf2fnxx9q *wo 6vq.5q-7xn c bplates 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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