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习题练习:Physics Unit17: Electric Potential



 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 i 7 s2nohygul.:s 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 is2jh0l r 80*nl;lp-om(aa l9z lz,re hd 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 surroundings. Objeov 6jtgx 8rarq yr(*/3 qpm8y4nenb4 ,ct A has a net charge of excess electronv3, /8or8(xyemnjy gnqrqb ar 4p6t4* s. 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 direction ogld:bbwsv8yj ,5cj8 .f 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 movi5s (x14ux9 vo3vctmihng 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 conducting 2)6 in j5mhvj q8r(fwesphere. 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 poagl80 a+ z 4txk59ykex -mwf.itential difference. If the potential d.59a-l8xe+ ik tmwxza4gk f0yifference 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 are at th*unm7g(i8p rv.mb7d sv/b qt- wn:b:fe 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 equipotential surfa ia(.qu5zsv 077xexfoeh h6w2ce.zea 62xqfh(o70isx7wu veh 5.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfa 9c(g6ldb9xik ce 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 chae1z*2z prb17.wv-a s b8r0 rm,qkj hyarge equal to that on the electron as arvszre.prby0 *wh -1a12zq,ajkmb87 result of moving through a 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 by, d .:pys: 8totfa*p6 ,qmyra 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 correclo 0dv* ;na k4vfme5k*+;i5igy 9rajsponds 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.g1xvole t8; gewx:6+ u0 m from a positive point charge is 100 V. +gl8;e61exugvwx o:tWhat is the absolute 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 fr81 y 5izhteu,wom a negative point charge is -108yuhzei5 ,1w t0 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 o*n5+xommdyo/pi f*i-. mz, 6uad8frcf 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 cenm+u / y8p, ai*ffm -m5n*zo ddr.co6ixter 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 wc(res:+: zs8p4 +bkn yud 0peahen a charge of +Q is located at one of the square's corners. What is the absolute potential at the squknyecu8 ea:+zs:s4+( pdb r0 pare'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 csthj( rl,o fuh7dt m46 o/+rk:onsist 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 z)kgzoyln53 l i:e; )lis 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 identical66ph2n -b4c+jpeve mw ,e:uni in every respect except that one has twice vji6 n+ e:p4e bn e6,w2chmu-pthe 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 capacitasx df:cds rf.nd1;.g )ej z11xnce of C. If the area of the plates is doubled and the di;f.: 1 ncsgf)j. 1ed1drdxx zsstance 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 p9n4 -xkij*efq1 ,o zjtarallel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the pl9 q1koznje*4 tj,ix- fates 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 xscypbobqn+ p,;8v h7e0-g i/plates of a given capacitor is weakened, the capacitgs0ohb+v n8y cpbqp i-x; e,/7ance 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 )- tp1zuqu1op are maintained with constant voltage by 1uz uot )pqp-1a battery as they are 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 capacitor are maintainets vs/4,yl69 amvfb 1qd with constant voltage by a battery as they are pu mv4s qbyf,v sa69/l1tlled 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 fortr .ld-v4ip 0wy1ow6 5;kjv4y9thxec adding a dielectric material between the plates of a capacityh91y5-i 4 0jdc v6 4wklet.vp;owx rtor.
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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 of a cap;s55pd)f sof 0kk wwe0acitor. What happen0w fkw0k)fd5o5 ;sp ses 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 paper is pl ,jqdt ytmt8i7 5tjh/ip5u00aaced between the plates of a capacitor holding a fixed charge. What happens to the electric tpj5 ,t00tj8 qath7di5my /iufield 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 char6;(qeb-rlb.* c wk zov wyko40ged. The capacitor is ww6*4vye;qk obb-l0z o .c(r kthen disconnected, 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 capa04y* ox ldf .)qk3ynnucitor holding a constant charge causes the energy stored in that capacitor nk 3*qxo.4lu n)ydfy0to

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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 the energy stored ind1*j*a6qt9o jwcnjl :k pf (;j that capac1lj6*jcj* :f kwdn(;pqa9 otjitor 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 vre f:clseza6r .f5 +*0b2nsj to move 10 C of charge from point A to point B. What is the potential difference between points l s6*+2 :rcjevf5fns. rbzae0A 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 movinei p2s ,ahfz23g an electron from point A, where the potential is -50 V, to point B, where the potential is +50 3,z2 fha eis2pV, 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 throughob+cr9t 8 5l5c2jbvue an electric potential difference of 500 V. What is the kinetic energy o rjbl2v9 t55oce +cb8uf 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 aculvcu ;8 (g.nocelerated through an electric potential difference o ou(c8vl ug.;nf 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 potentia j7hklfwz0d0 :l difference of 1200 V. What spekw:7jl 0f0 hdzed 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 9bz*l/5jpsrmqg n+/t 4.0 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 potential dioqc.ce7 q5cy7u vo57.rhfca/ fference of 500 V. What is the velocity of the electron af. qc75f ca y7o.uo/v7cqre h5cterward?

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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 k78c mc5hcgd1 rest through a potential difference, and afterward the ball is moving at 2.0 m/s. Whadk8h 1mcc7c5gt 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 paralls7h0,fno t 5sjel nsf, so h0j75tmetal plates 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 magnaj3j2cw)2n3i vfsr of-v0*mzfz:-ru itude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V,-vs0v3f: rzc2a3fuzo )j* -2jrni fmw 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 dir6k sje1 e;ca14az+6r dqu+ .6xlqjhuvected toward the east. If the voltage measured relative to ground at a gaeu6q1c+sd kqx.h4u l+16z ;a rejjv6iven 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 fiel2;iq w9 vijn, qazf.f+4rykhn*3:efbd of magnitude 3.0 V/m. What is the change in kinetic energy of n*f ,wr:;+z2v h. jfn4qiqk93fbye i athe 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 b2jt*v4spzs u5attery. An electron released from rest at a location 0.10 m from the negative plat42sju* pvs5tz e. 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,mu.gsi9xr cq 4dc 74rbw*.c vt85wbg, 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 electron arrives at a distance 0.050 m from the posi.w,8vsgc4xr b cq*rigc5uw4.9tb7mdtive 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, sepa 3xwxl / -s24gv3pyvwkd9zxm.rated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negativ2syvm 4xk.3dx9/v 3l x-gpww ze 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 tr8 .10;t*hxz dwnqmhd -v1ayj he east. 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 hyn;dhr1az-m. dx1j t q*8wv0east 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 e 4xa( ,ua5l4sd9olvwhkf (f r4hcbc3 :lectric field of 50 N/C directed toward the east. If the voltage measured relative to groun94 4 hru (5sdxkl4v c wlcfo:afa(3b,hd at a given 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 *sr-q(es a:qire uhz7me (xf4 9/7 ivjwill acquire a kinevqu r *(9-7eaim:f z/qh7reessji x(4tic energy (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 potential7n eblk -l9jvwne,,aub fci,-*e k5c , at a 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 the ends of a meter stick. Findewxgp v/-25ve j qjj80 the electrical potential for the centex q -geep2w85v0jv jj/r 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 att4xg5op .fm0esd.d (b (3.0 m, 0). If the potential is taken to . f d.m5e( t0gpx4odsbbe 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.q8-gau gydr4dhl 65d20-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy ldg-u5 6qaygd8dh2 4rof 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 is at (3., g:dwo ikk:f(0 m, 0). If the potential is taken:i,kf kow:gd( to be zero at infinity, what is 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 hjhn85 guy74tx;d uig hq4y6 s.o x:.mare placed at the corners of a rectangle of sides a and b. What is the potential at theyod:ni;t4uhh qx4m .gg8h5 sy j.u 7x6 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 two diagonally oqf*830axn:ncbr n+q6ew ah a)pposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is cwahq*nr) fn3 e 86bqxa0n :a+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 (charzfo7 + v aydnwn0xy53;ge +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 toya.i)dsb 5kpu7olt 9 7 place three charges, each of 2.0 mC, at the corners of an equilateral tria.sy okla 7d iu5p9tb7)ngle 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 j6bo;j 8 pib 8(;7qmkhz6sjqmcapacitor when it is charged to 100 qsjpimqj;b7koz6h ; 88m(6 bjV?

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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 k :(g0eevd(oyarea $0.50 \; m^{2}$ 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 fi iou;z) 77uhpilled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plateui7)hp; 7ozui 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 cgb( / j8* 8eaqa+oyrmof 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 poz4goj6ef bxpm :5bk72tential difference between the plates is 2000 V, with the top plate at the higher o mxkjgb7546 2e:zbpfpotential, 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 battehkll 12p:nrcuq1 e sp4c; j,n/ry. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = pcn;, jhqr esp/421l: 1n uklc4.5). 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 a3qscaw q1v2 g3qy* qk8 15 mF capacitor. How much energy is stored in t*gcswqav2q8y 1qkq 33he 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 in amkhl v 2y*09vthe capacitor?l a*vvmh9 2k0y

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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 platbh474vk 0g/a8p gdg(vb7jo8gb u-muq ma7zf+ es of a capacitor when it is connected to a 12.0-V battery. How much work was dou778m4bh+o g -7ambuvvg4/gj gpak( b0dq fz8ne 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 thacz: *hl h +z7j:mszf/39q8(wevm bry lt 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 platcb t1 ez2/-:+rgimu e v60rig .1iqyhjes 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 consisb*)jxkc,7bsbdrq vg 5g8.4t , 8cvypcts 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 plates of area 3uzunt+: dk3a$1.5 \times 10^{-4} \; m^{2}$ 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 areo5o)p*ir2vldvbn5; nyo(5 to 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 plateg vm sga:-3xoi3:5s tp 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 cot 60pzst5o- :5yiryqennected 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 it-pz55 yt6ois 0y:reqs 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 pw /pku mvu0wx8j:* 5ab k,z7vconnected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fu58wu* jakm b/:,7vpw0 kxvzpills 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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