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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 followingt+3zfqhgc)wf,wd u/: 0xn--bph )oxi 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 coulomzya owf(v jfwbqi23k 5ef1+ *(b is 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 insularki9zbza;s:5b7p s :t()xmy aw9lne9ted from their surroundings. Object A has a net charge of excess electrons. Object B is groln9 bar:)tbkyz w;s a79 9z:px se(i5munded. 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 dn1)hw yj*4cagvt 5e2electric 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 d7 k5pkfr mafa3wz+*;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 onv5nl4xsl2,q d a hollow 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 is accelerated from rest to a speed v by a 500 V pot/lk p 9+ rt(.do59r; ynzl:pptk*awagential difference. If the potk +5t/o.rn d*tygp: p r9z ;lwalkap9(ential difference 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 points arv.t x ;/4jtsbze 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 poins8ngg-.dy vvpcgo /.bd)* *lrin-*+ pydxb:rt A to point B along an equipotential surfacg g8- i+)lx*bdr-opg*dv.. cpys/:r*yn bvdn 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 hi, r/:qr*zl6suuo; qmust 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 ce l)sny5oikq9w l,3 o98r)wqparticle carrying a charge equal to that on the electron as a result of moving through a potential difference of one vollc9iwls,k5 3qoe)w9 8 )qorynt 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 w9vz ;g ,cqx7a*y/7yrnmf;ecunit 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 corrqf- i-l7h5z0.bd ns.t+ owmjq-6eb ox esponds 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 char:i-unib7a h3dyq;m p/zue7q 1ge is 100 V. What is the absolute potential 1eim q/n -hzy; qup7bua73:di4.0 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 dd.av w 6k,t+hyqt38q2.0 m from a negative point charge is -100 t8d ,6q 3k+yvthdqwa. V. What is the absolute potential 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 center of a square is 3.0 V -6; -vjjrcvqa abz .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 other- qajvaj6cv-vr.b,z; 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 vmzbb ec1t9 t9i48q6l charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when a sz86 bvel tc41b9mqti9 econd
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 tlwm)q - ,za3k-dlt ,dcharges 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 is a g13mn 8f2zxap

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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 o)lgy*2h(ncms m* om:6t84r t fqsyn s.m)j.p qne has twice the plate area of the other. 8pnh*.t( tmy6. n2qmlcys g mrqof4:j*)s )smIf 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 hw)lhg(fjzm55c/jx z;as a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new capj;jg(x f5m zc)l5zwh/ acitance?

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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 fully and then is cv1w47qdgvka7 a6h4/9c wit xw 9bvk 0removed. The plates are immediately pulled apart. (With the battery dwvw 746kqtd bv/7vc kha4c9igwx019a isconnected, the amount 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 wead gyar1 f5,+h.; wjvnokened, the capacitance of r;+5wn ag1 .vfdy,o hjthat 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 parallel2fceqisz ;(e /qjh.+wq-)vh r -plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates musq) .j2eh-/ +sqeqc wizrfh; (vt

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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 capacitoywzwk7, k+cr q,j /j2/iw:qid)uui k0 r are maintained with constant voltage by a battery as they are pulled apart. What happe, u0duqww:i)ck+r 2iwj y /q7/ik, zjkns 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 ofye:)/ka ntchl,ag 2x : a capaltgn ,ayx2ha::k) /cecitor.
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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,iwpm3+b;rq:99zg dysm 1 w ykiqe7a ndus8-7 placed between the plates of a capacitor. What happens to the capacitance;bzyrmwa dk9 :mys ,31 u e97q7+wnqipd-si8g?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material sj2 ure4k+ ,soofrt-twth e896uch as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the96fue, ort- oekjt42+s rth8w 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 chaz5ct5i,3r+ otagw; nkclk7 g7 rged. The capacitor is then disconnected, and the separation betwe 3c+5oinl c5k7w,k7rat ;ggzten 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 capacitanc ;x5xhvrnvxfa. hsx:96j 4p2de of a capacitor holding a constant charge causes the energy stored in xx x6v d;snjf5x p2ha4 v.9:hrthat 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 give 7( n vlv+d6+lpelkwe lw(i-*en capacitor causes the energy stored in that capalp(*e(6wn l+d -l7+iel ekwvv 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 m ,4v z4zovawhih mw3 gg4upo9(dq;l**ove 10 C of charge from point A to point B. What is the potential difference betweeo4l*vag(zhvw*o3 4z4 mud q9 ;,gpiwhn 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 v d o0v :x9+t f9j.ikf4yp;0k+wpksvkpoint A, where the potential is -50 V, to point B, where the potential is +50 kvy 94o.vd0jk;wpk90+i xk: s tvf +pfV, 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 poten ; d85dq pese/8kujf0hx (qb,ttial difference of 500 V. What is the kinetic ebp ejk5qqef8d 0, (thdx8us;/nergy 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 electrio dsrb; pb4,y*c potential difference of 500 V., byo;sd rbp4* 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 potentialf4 t.d vcqax(h .ifa1s-/vrp6 difference of 1200 V. What speedv . (6.-td1ph fxsaacfvi/r q4 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 itc s;jg)mkld* )w;,o rn 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 potential difference of m j4;+fo1g z awhdhu.-500 V. What is the velocity of the eleh.dh4-zg m f;1w+jauo ctron 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 objes/ kc o9kf730p;j erobct is accelerated from rest through a potential dif 3rk/;j7of ok09b secpference, and afterward the ball is moving 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 differenc1 9 dn.6nv8bdbm0qvn ue between two parallel metal pud.9 6bvn1ndn 08bvqmlates separated 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 500 V/m, is diresmbtp)c 2exc z u n, ,/wuc 2+vbpldet.6-3o;qcted parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the pote3 -;nuc2,xq/els t2b p t,z)cdpc v6+bm.woeuntial 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 direc;qrwy 4qy(o:f ted toward the east. If the voltage measured relative to ground at a given point is 80r fq4:;w(yq yo 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 osma2 9.hh3p xmf magnitude 3.0 V/m. Wha93hp x. sm2mhat is 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, xmww4i wv:2n)8e izn(separated 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 em) ew 8nx4w:vni z(wi2lectron 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. .nzt.mxyq y/tkk+bzsv 49( 3udqy w4, An electron released from rest at a location 0.10 m from theb+t,44ut x(nd /.mwyyv.9zkqqz 3sky 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,r;kfrxes9sz0rm58-b nd+s ck5 z3 k +w 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 positivew+5nkx8-s3 z r5sr d9b+mkkz0 sc;r ef 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 fie1yrm:2j uk mr-pvmg-y y7b99gld 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 is the voltage at a poin91v:my -krbrjpmyg9y2 -7g umt 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 direc,rt8b t0zfc*m ; wii,wted toward the east. If the voltage measured relative to ground at a gii0f ,tt8b,z;r*wim w cven point 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 potential difference of 12 V, it will ac+cg c50f -q2edqau1,lxx:ig7m a(adn --n wp vquire a kinetic energlna:c(wd i5u72-dg-1v+qnp, a xqx -0 meagfcy (in the 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 a distiyuyac/ ; 4rmo g7(4(d 7ciweoance 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 tls9 d,b3swpl 6x,4,udv ,e ae.tdwd4are at the ends of a meter stick. Find the electrical potential for the center of the mw advtw ,d4d l,x43bse,t upl9 ,.se6deter 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 ; u3yw3a;k cswis at (3.0 m, 0). If the potential is taken to be zero kc33;w;auys w 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 t6nk dz+s 7nd2p8 rw2lis 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, 4.0 mplkwd2d2t86+7 s znrn)?

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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 atbc2-i+ iwh/; u.la 0 wy5-s9l(d+ cptfjoumwq (3.0 m, 0). If the potential is taken to be zero at infinity, what u/iwp.c s+- j2w (+a5d ;ulc0ho- i9qlfwbymtis 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 8n7rvn e-,ducare placed at the corners of a rectangle of sides a and b. What is78nd unc ,-vre 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 pvn s7s:mhqy9; 6f ;emxlaced in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0f;;my6hs ve7mn sq :9x 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 +a6eu;8nv 5 yi 3t-tnaf2e, 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 nu.* q)ocncn* h(i z7scharges, each of 2.0 mC, at the corners of an eqs *h* 7qcnzn.(n)icuouilateral 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 capacitor when it ) 8qpp w3tjs)sis charged to 100 V)sp 8 jtq)w3ps?

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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 area v+dy q: a6eri0mxg 9(q$0.50 \; m^{2}$ 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 separat2mt ctqenhz 5gnmktil n ;0wb)-71 ;:ied by 0.050 mm. If the capacitance is 17.3 pF, what is the plate area?t 0);ni 25:qkwztb7 lmgt-nhn; iem1c

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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 ojndsi 1 u45:b p8rd1euyb3hj 1f 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 thei;h f4w1mj4;kohq3 fxx x1tp6 potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field xp431hh4q ifj xm;f k6oxtw1; 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 conny7ry5obdg*h0 i5da q 1ected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immd0y5ya751qhdri ogb * ersed 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 much energy isjtbaoyoe l-a srx6t :+x)4 83b stored in the ca+t:l6a jaye r t- 3xsb84o)obxpacitor?

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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 tf1ulj9fxg n k.5qk* 2stored in the capacitor*51j2u.kkq 9gtnfl fx ?

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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 capac7v8qz n.pci ,i rr+*kwitor when it is connected to a 12.0-V battery. How much work was n 8r+ vk*wr c,ip7i.qzdone 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 stores qv+g+nq ci)hm:7wys 5*: tfh2mfm lq,$2.0 \times 10^{-3} \; J$ 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 placl5ja+ f +z:tg :eks2ites 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 plate5 x/ 9if8zxtews 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 g r5sc.6hwr.ct 1 w1ueplates 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 is0c06a9g mf b2hzx nmj0 constructed 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 cons )f6m.kx4rt)/ tmjbvsi .kz z,tructed 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 bobpve +()u tv1r *5vetecomes fully charged. The battery is removed and a slab of dielectric that completely bo5t(ept1vu + v*)rev 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 connected to a 50-V ba r 4wi4;iwj(jvttery and becomes fully charged. The battery is removed and a slab of dielectric that c4ijij; (w4vrwompletely 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 plates after the slab is inserted?

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