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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 followino0)mxnz nwx,zy.xfse 2l 9qmt 26 3mp+g is 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 is aqj sxv8c847xmjvup/6 d kfl;+

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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. Obpw,zesi ee d88sv)m;2ject A has a net charge of excess electrons. Object B is ve;sdi,2e)8zsmew p8 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 electric fi4p /,qy2 bydubeld

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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 t ugw0p)-3og-bxq -g9 )z jikzpo 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. Th le+g;cegw4 8yey

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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 pot sq/pg26 s0zotential difference. If the potential difference is changed to 2000 V, what will the new speed pz2t /g6 ossq0of 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 refeqr77pf08e7 no lx ivk+rred 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 fn2fd12lq 1-qg,y t 4- d51orprzw uznmrom point A to point B along an equipotential surfac2w 1yu ft-4-d grz,pz2r1mnon 5qd1q le.

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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 be64 g ijq4smex;

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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 33 jo4pkc-o wtthat on the electron as a result of moving through aw3ctoo3k4j p - 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 7 f0.ssl sj4 w1yg7ejdof

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspon(0lr/r s liqva.;e z1nds 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 charge 0y nnl6t/ yac9fb ac+7dly3b 3zi02 6k aow/mcis 100 V. What is the absolu 9lt c0adbc6c/ 07abnyy+ 3/kylowi namz263fte 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 distance8casbbrn x 2zgm ./wfpn0+1)8 qrzk 0h of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point charm0rsr8n1aw bc 2 nkb80/z.z q+ p)hfgxge?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential ata3w4w2z9+k 6gc nabhb 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 potential at the square's center when each of thez293a bwnagk6+4h wcb 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 atu;y 9q o)y9 r57tpvutt swz-e8 the center of a square is 3.0 V when a charge of +Q is located at one of the square's;8 )wu-qr 5zps9uyo7ytev9t t 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 consiacu,fp5k/*oj st of two 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 npzpavfs*,q 557m1xe bvecpvz0 f76* 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 identicalp5-hkgii a );z, ,oujz in every respect except that one has twice the plate area of the other. If the smaller capacitor hz o)ki 5u;ihg,a-, zpjas 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 plates ia:ua g,z09ty ls doubled and the distance between the p0a ytlzgu, :9alates 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 xaarh5m .(s(5 34okr.tdx1cnkzr (ns capacitor 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 happensr1n(5ksr (t.5ar3x ak.ns chx(md 4zo 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 r fddk5 *xreeil8az/a(6-h;su)9n kdof a given capacitor is weakened, the capacitance of that capaci9-deksx6)fin rd*rd8/e(k uz; lah5 ator

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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 3b cv wa3(isk:with constant voltage by a battery as they are pulled apart. During th3(cs a vik:wb3is 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-plate3: vf*+ohl 1a:zu: ja;joxkaf capacitor are maintained with constant voltage by a battery as thel1uaj 3fhkfa+::j;v*o:x za oy 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 dielectric material between the plates of a capv(s 16w4 n eqze6g4:le -qhgeva8hive :;e)bxacxqeabsele z4 6:h1e-hg;vei6:vw8vqeg( 4 n)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 between the plates aoyc)*jd i1p.of a capacitor. What ho 1dy.piac*j)appens 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 material such as papeuspi5+ q5bh gwr3m6 s0r is placed between the plates of a capacitor holding a fixeih50rgs qb w5u 3sp+m6d 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 full/k30en ftlh .hy charged. The capacitor is then disconnected, and the separation between the platesh.nt/3hk el0f 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 cop3,* aj6b(;cnlilc v bnstant charge causes the energy stored in t6;,bilv c alnbj*3cp (hat 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 ca uh;k-m ma))cre)yd9vuses the energy stored in that capacit)h ryku-ac) vm ;9m)deor 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. W4 hxgohket.1,f s ahg;)v8.mchat is the poten.hhgsf 8),4tkhma1.g e xovc;tial 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 mov-b4*1ihw5 ; qp 9ervx rinux5zr,b y9ding an electron from point A, where the potential is -50 V, to point B, where the potenx,* 5d ;xh pzrneybribw91rqv59i -4utial 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 acc) l( dq,u57e,oa ib 6hsh:yolzgn1, gcwi5o+ qelerated through an electric potential difference of 500 V. Wh ,qqihu :g,1wo, 57 nysl)zb gohliacdeo+56 (at 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 anso tmtug 76p.ll8 d0*m electric potential difference of 500 V. What is tpm8gld6l 7 .0tuo t*mshe 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 differen(f. i*8bxbd 1 xpqs 0fksb0,qice of 1200 V. What speeskb8s*pb i q .(d1,iq 0x0fxfbd does 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 moving cj 7 9umgo3 c8fit-tg3$8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electron i h0)r7naq ux8yk. rj)es accelerated through a potential difference of 500 V. What is the velocity of the electron afterwar7rkue q). xj8 n)rha0yd?

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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 d)7zgr-ju+,jehl -brzl0d+ h rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the pot0jh -d-rd7e,bzlz )+ rguj+ hlential 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 beqta whk15/r:y tween two parallel metal plates separated by 1.0 mm. What is the electric field between the/qa y:thwr 51k 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 t8hv5dz: 67fzplqa5dparallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x =zdq5:al5d 786vfp hzt 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 et3xbt )m bn 0o/im4z,uast. If the voltage measured relative to ground at a given point is 80 V, what is t3m40bo tbni zum,)/txhe 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 dir a:izw(/w3nkuection of an electric field of magnitude 3.0 V/m. What is the change in kinetic energywa( wnui/:3 kz 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 12vw gvq0f0-tel.91vu u-V battery. An electron released from rest at a location 0.10 m from the negative plate. When 0wvqv0 fg u91 ev-lu.tthe 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. An epjk a;sq;+94ir 3abtgd2a e:abx2r. m lectron released from rest at a location 0.10 m from the negative plate. When t:eb r4r.ad 2m ta+g 92ks;;xaqp jbi3ahe 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 battery. 7aoy pv;g/v 8;vuvp8a An electron released from rest at a location 0.10 m from the negative ;pvvav/p7g8;8o va yu 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.2h lw*x/xv rwcv/(m.,/tf x ba 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 ox h,rvtxlx(/cwv *w2 a//f bm.f 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 e by 06ydcdtdnz1.c+ k5lectric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what isdy0k y b5ddtnz 1.cc+6 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 potentl h(il d7 8)p:vap2fujial difference of 12 V, it will acquire a kinetic energy (in the absence of friction)h pldi7vuj( p2f)l8:a 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 of 2 a,dj0tc7dfp$5.0 \times 10^{-10} \; m$ 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 o+/l: ul1z 48j9ns9skf7unmqjgxzvo5 f a meter stick. Find the electrical potential for thgls7k9/j mjnuq f:x ol9s 4z+z15un8 ve 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)8s .(nw0o+8uzl3cpew.f*j flo)r qqa and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero a.e)ulzfpl rjn08 c qfa* +3(8owo.w qst 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 aqx 57c;t,j s)smrpgd: t (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 electric potential :,;cm5qjgx p )sd t7rsenergy 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 -2.1q/6 1norpj ud0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the workq6p/ 1j1unod r 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 rectangle2l2p gkc59n 1u2obhac 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 = 4a2 k5cuh1nc bg9o2lp2.0 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 placed in two diagonalld-0prao5/:dr mhx: kits3oo 4o cf3t(y opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is ti0ctrm(rtos /5 ako:x3o :d op -hdf34he 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 +q,;. cny;v rei2e, 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 uvnoulx to 4/hf. 85,*bf jar1f/jdp2corners of an equilateral triangle of sidelr4pt/jfvobdxo 2 8 fj5.fu 1ahu*/n, 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 capacitor when aesf cmh* viz3;+ qun :a* op1.tpwfpz,g )8n:it is charged to 100 V +nf;*,*ahsve qo izf8mgc3ap1:.tpnw :)upz?

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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 p3 nrde38x uww0e-vp4jlates 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 are separated by 0t* y7ukp*ah 9k.050 mm. If the capacitance is 17.3tup 7*kk*9hya 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 af,r )n2o68zrohm2yl 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 po8hlp,v 19d5vk)hg0 uhln;m zl gjh/i-/p /a kvtential difference between the plates is 2000 V, with th 01h9 /h, -iv 5hzvnpaud;/km v)/ll8glgk hjpe 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 thekglheb)dm775f: l ,puf q*7v m battery fully mlpmu b7*l fkg5qf )77h:e,vdcharges the capacitor, the capacitor is immersed in transformer oil (dielectric 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 o l( iz;kqf5 ip0bl1*jz:f )lvmuch energy is stored in the capacit:0;)ii(5v*jll 1kfzqzol f pbor?

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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. g51uwr 9tv3guWhat is the energy stored in the capacitor? t1ggw ru39u5v

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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 flow4-bc9dc x b;fh p+ub. ndo69aus onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in+ucb od-axd 9f49u pcn6;h.b b 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 sz sc:x7q*a +gfy;+u l*cf2utq tores $2.0 \times 10^{-3} \; J$ 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 consistpbgh.8r j3:uj3 0gxjws 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 gjq w +ka-wn;q-t -3)t-aafgw 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 capaci0yei89tj f(q jtor 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 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 zlh -qjv((+t3o b :og(wca6bkarea 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 witqn (s(qms vlnf48; mx7h 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 conne gdofczs,m+6ap66w 2d cted to 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. If the dielectric has a dielectric constant of 5.0, what is the capacitance of the capac+ 2g6aoc,ddzw p6ms6 fitor 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 a jj*4j*r7vl )khwehaz v 8b(n.nd becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space b**vz jk4 nvahbejh7w(8 l.) jretween the plates 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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