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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 7gi6 lgsojug tymz6,, 55q7tcvector?

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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 ismrx fs -njtt7r-9 f6i2 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 objecu slf6kukq x9p6:v.)6a0 -m9sn e qujuts are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a highupl6xqq9fs:)ka j90u6k u6.-svmuen er 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 electuwcvjj8 7 jxt6 -(j2dcls/)r/v zww:e ric 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 electr3jo1.g qi+tr0,j j gakic 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 hollog 8aj6w+vvnk d6/ nn8 4o j0xh6mq9bavw conducting 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 i)0b j75lq5/ua.it xoknyjsg *m8p n-as accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the neqsia*.jm njtly)xg -87 p 5a/no0b5kuw 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 thdhsav w./8lom k4(7pt e 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 Bgqhaqm5:(3w 5q+/jj h ,grid t along an equipotential surfacgqmr+,5(td/5ghiwj3 qjqha: e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface m;qqpeo /6o0s sm)1r wv/yp k1must 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 part8pfq2p)m ivw2 5ft2a ticle carrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is rpawt5 t m8 2fi2p)qvf2eferred 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 r(za(0c33,c2 ea flrbh8ilm bunit 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 correspq3.mukq-nww-f zwgf)cq 3t+0onds 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 pt d,z ;tcqllb7;5t;/+us buey xi3x3cositive point charge is 100 V. What is the absolutey5;u t;xeq,7ibbc/d z 3xt3s l;+ctul 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 m from a negative point chargz,t5)92 ia+1fg2lacdpu 8iu. i pg puwe is -100 V. What is the absolute potential 4.0 m away from th2taiiu25w ,fg 9pcagp+. uduipl 81z)e 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 center of a square is 3.0 V when a charge ofab2iz 5z fu1)*wdqs ex5m (1wc +Q is located at one of the square's corners. What is the absolute potential at the szu z)q 51bcw1 m idfe*25aw(xsquare'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 a chjd3u khi.p-pz4z -;(te s iep;arge of +Q is located at one of the squarppp-; .zt(ui sihkd-3; e4j eze'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 tworw ,s,(q xb) dypnygup a;7d9i/sx +b. 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 iatg4h dr) -mw;2k(s ahs 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 isvo 0ayq8(q:n0y6ccevery respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capac c(qs6ncqyo 0 ya08vi: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 capaftum25z 1wpf3 lszb+6rhz3 0 mcitor has a capacitance of C. If the area of the plates is doubled and the distance betwe z5su3hmbwt 602z1+3 fzflrp men 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-platk 0x)+f gekz98 y.fi)zuh4cejji3 p*xe 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 happens to the potential difference between the plates as they are being sexcz4x9ui) pjk.e+y hfzig0)*kefj38parated?

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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 +4a i-; y.ltpukr.j;.cjqcos the plates of a given capacitor is weakened, the capacitance of that capacis .uyc.ljarik+-qjc; t ;o.p 4tor

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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-plv+z-9 xm +uawzmj3g5 aate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this proceg9wm5 ux3+zav -mzaj+ss, 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 constana:yv vyd1qdryhoy2j+ gtm +) 3q7h67k t voltage by a battery as they are pulled apart. What happens to the strength of the electric fie7+qy2)t 3k mvyr+hgd oqyv hj:d 6ya71ld 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 pla:vnu ; t+i5h1krgfk3dtes of a capacitor5;rgvu3i1 ktndf:+ kh .
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material ,ohw8m 57 ujz 0wsc/ezcaw(t3such as paper is placed between the plates of a capacitor. What happens to c sm,a( ewjt0wc3z7h/ 5w8zuothe 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 pa/rs jp8 a6kyg6per is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between thg6srk/ a68yjpe 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 rmh jp ,o(vflxeq.*3 :charged. The capacitor is then dipm3 lhxv, *eoq.(jf r:sconnected, and the separation 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 capacu-. 3pryr xa8zitor holding a constant charge causes the energy stored inpzuyr 8 ar.3x- 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 acrossc9hb-d3nd -gs a given capacitor causes the energy stored in that capacitord- s9g-n3hbcd 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 s9az10m2rm3njj 1(5 *pi2imz- b gwfrfqupj) point B. What is the potential difference between5q*u0rwf3im1ja-i m j2 jz9sp z)(mpn21frb g 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 ag(gq/gmmdbh8* a cx- ei9 yy 398 -ni(qlmch-the potential is -50 V, to point B, where the potenti-yaac xg-mnegq*hcq -h(gi/by9 mmil3d88 ( 9 al 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 accelerated through an electric poten2i h3:g db+fhk zo/9rntial differend2 nkrgf+o/ 9hbh:3izce of 500 V. 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 n (9 ella),o0j*ee8gek:zl cmthrough an electric potential difference kc o(e8gn) a *ej,0ezmell:9 lof 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 dq.h qc4bwy6u2-1w ab of 1200 V. What speed does it acq4qwdbb w.1- q2y6auch 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 movingvodr1n8/6jz5 1vi/4g/nn. obw xi sgq $8.5 \times 10^{18} \; electrons$?

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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 )d3 fiykqhayi zj7n8,6ow)a2 of 500 V. What is the velocity of the electron after,2y hqi d8za6 n37f) wojik)ayward?

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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 rest tx;d imx 1bo47jhrough a potential difference, and afterward the ball is moj4o7x bxm;i1 dving 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 th zb us6ia9edt/-b +-die electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the platdui- - d/ 9a+zbebit6ses?

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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 ts4p0nii(q5p ebq/h k onw;d/7o the +x axis. If the potential at x = 5.0 m is 2500 p4(qpb /s0enknoi/;5di qwh7V, 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. If the volop )*hvka1x3x9da 4ut tage meauxt) pao 3vah4kd19 *xsured 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 t,l 4*k1 vkt4nw e0mnhhhe direction of an electric field of magnitude 3.0 V/m. What ikhek t0ln 14vh*mwn,4s 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 12-V battery. Avf9-, 0..aou+jcd eh0 juj h n)zhqo4sn electron released from rest at a location 0.10 .a dzje)qv sh-u9joh c4n,f.uh 0oj+0 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, 3gu: 8zuxua1 qseparated 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 m from the positive plauz1 uax8:gq u3te, 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 byrja.-bv zxjh 2.k 1-ep *gc 1mddzlk93 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 m from the positive plate, what is the speed of the1-xrbl3a9vjeck2k.g - pd hz.jm1 *zd 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 electrilt;.6v5 g9 bt *nwupmoc field of 50 N/C directed toward the east. If the voltage measured relative tb gto5* 9vm6.wup ln;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 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.28g hcttdw 7,g If the voltage measured relative to ground at a given point in the field is 80 V, wha7tw,gtg cd h82t 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, it will acquire ji 8gcy5s o)nwuer8+2a kinetic energy (in the absence of frictiro58e)8w sj 2g+ nuycion) 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 distan,9s*cwuum1wi hh5pjury05 p ,ce 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 a+/ un qpp-hj1hre at the ends of a meter stick. Find the electrical potential for -h/u + qj1pnhpthe 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, 0). nj0jee s*h0)u If the potential is taken to be zero at infinity, whj s u)0enh*je0at 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- -w6zoz)z7qg gjfuy0+nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the eleczo gyf-w+q zu7)g0zj6tric 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 xxjxb 7*, m(* n*xw b1aah4hxcrak 35sis at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1,sb xa45 cx* 71m*3jnxaxbrh*(hwxka.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 rectan 1yo. (v:rg(4 vwjkvtcgle of sides a and b. What g.w: (v c1v4 or(tkvyjis 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 placed in tr;euzxo / gzq3k7p4u. q+h*o xwo diagonally opposite corners. In the other two corners are placed charges of +3.0 mCuxh/;po4 kg3qzx o*+e r7z.uq 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 (charge + 8p5wof92heiv .by6ye2e, 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 of87 hrn 3hsau u g:6s*4wblo+cg 2.0 mC, at the corners of an equilateral tri7ra 3s:sug *c6g8hl4hw u obn+angle 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 am ocn yf,r;7- )mhy,rlpr +qm: 2.0-mF capacitor when it is charged to 100 V,r+oqymr)ml c: ymf-hr7 n;p,?

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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 ha3n2weewopv /p;d 06 vjs 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 are separated byle9c-mq z ;jh,8m ,vyy 0.050 mm. If the capacitance is 17.3 pF, what is tqcmlv 8j9 ;y y,m,h-zehe 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 habv fobm.v55e,ac*+ops 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.l8y6jr4dx ay ,xuy73;96da;cbohtsd )f z+dj0 cm. If the potential difference between the 7yujrcd+ ;9sxld ya6, 6 4)ozx ftbddja3;hy 8plates 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 is connected achi) a ;q*gnnd)z1mjq/ross 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 charge flows from t qgn;jn1)/ az*imq)hdhe 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 pl-mw3xbik3/ (dhfa;hvn h d5g3aced on a 15 mF capacitor. How much energy is stored in mdd3gh5wh3ix kanfh -/ ;b3v(the 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 energy stored )s 4ofoc5 xsuyi-z6f(in the capacitorso yzs( 65fu4xi)fco-?

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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 flowsv :x8p3mm;5b *afd ktm onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capacitor?m* m pfamdb8:tk35;vx

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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 char1exadg4r. g8kged 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 e .7d* ncxlies,ya5wnmv;9 q 7plates 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 capacitor9bs0- zhreait1v5(k 6 otq0k n 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 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 plates9op9n 1pjc 8z10nkt/cn co6u j4xqec; -mml9q 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 are).aejwst+0suhc y ::v a 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 with/y6bkv 6lvgxyf 8vct6z q8u12 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 becyr n71p9 kdbj(6en2;di:t otm f fp59somes fully charged. Then7:mrfoie59ddp j(y1k;f9 t2n6 pbst 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 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 connectkx xbnoe3p-+6f7 gi v+ed to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between n-ogiv6 k fx+b+73xep 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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