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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 vector?xn *swof k7f/l ;: tqq65g bpis-sv;v:

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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 ziu9ie gwv j3vm)-t94is a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminumfb p)rxac:dl 01ys26 sf:xtz8 objects are insulated from their surroundings. Object A has a net charge of excess elexbsp fa 6yzr2ltf:s c01)d: 8xctrons. 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 mw:ue 1 idn: pvk4,d t*z1b7zjktx-9f direction of 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 moving in a direction opposite to the electric z2/u7gjrx) dnp;u(fffield

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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 hollo6yi.oh (x2 a5sajh1hfw 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 potentif802q is0kgar al difference. If the potential difference r82g0 qsia0kf 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 the same potential x,+p/8+inenjh o :u)4ffl khv(nmut1 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 alonp27tv)(ah d0cm ak -rw.5wpt lg an equipotential surface. mdpk0-5lac p.2rv(ahtw7 w)t

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface musl(8k) 8n)p8t uaa ti-vdnme2zt 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 th a v,xr.hs2s,we electron as a result of moving through a poten rvx,,2sa.swh tial 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 ll7dugz117ls4n f)txr:cul0 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 corresponds 9x: 8s y)+golbvtg 3dlto

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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 frome sc e;j6rq bta(ap).*u+kgf q4b.1hu a positive point charge is 100 V. What is the absolak6u;ufq).(ct s pg re4bea*.b+h1 qjute 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 poin-w:h oqc5:g cqt charge is -100 V. What is the absolute potential 4.0 m away from the same point char:5 hog-c:qcq wge?

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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 chargepp(-2d7nu iqnnnrz7. 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 corners is also filled with a chargrz7-nnq un2 id7p.n(pe 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 chargewczv(bzfpl9)bfof3t: jk+xw 6 (3fx3 of +Q is located at one of the square's corners. What is the abs6z)tf(b3:w +3kzx jfcx9ff v bo3w(l polute 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 two chargmu qi xyeu+h. 62/tui4es 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 aa b/tg)j u80lq7n(k ym

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate caqd,-6wk1 xf u 2glgu)(h h5sndc9we 9tpacitors are identical in every respect except that one has twice the plate area of the od g2h9nxwhu6gcs5k 1 uf)lqd te9,w-(ther. 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 9p bayifb/y8my, : f9:ii6 idlarzl98has a capacitance of C. If the area of the plates is doubled and the distance betw/98fly yl6b89 fa:arp y9m dibz,ii :ieen 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 capacitor fully and then is removed. hx,enm+gvi7 gi-p 51 n The plates are immediately pulled apart. (With the batt7- nnp1+v5i imhg,e xgery disconnected, 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 betw; u k1n9tj, *fpjo+gqlx-e 2vneen the plates of a given capacitor is weakened, the cp, n*n-9 2gto+e;vf1u xjjlkqapacitance 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 constant volk2p bcv( 2.fbq ceba.x,-:)u7wg hr vgtage by a battery as they are rk e2ug - ,vc7bwg)afc(p .b.b:qvhx2 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,n r/ fja1dj:nxz)5go r gg6,f capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this pro og5gn:a1) /ffx jr 6dr,jz,gncess?

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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 materia;)d1jlk qk0 ffowb x/6l between the plates of a capaco f;/wlfk1xjb)6dqk0 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 betw,kanf lxd1*tgp;o8f4 een the plates of a capacitor. What happens to the cap4;o8x 1afkg*dl,p tfnacitance?

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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 placed between the plates of a u v2eo9e )0k8kqn7bkg*5 glnl capacitor holding a fixed charge. What happens to the electric field between the platvk qnleu gn*k2lg9k 8oeb705)es?

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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 s(xgj1hag*h9h 0w5jd to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increasxgdj(whs 5 h1a j*h09ged 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 holdin.;c+ i 6feg1ljwm.itfg a constant charge causes the energy stored in that c; clg.tiw1fe .jm+6if apacitor 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 causes the )0 szhi4 z+bwkt)t 2zw au76cyenergy stored in that capacitor +z yu 4t)6a2zibhkwt7 wsz)c0 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. Whatp+3ztet3 c9iwmn 9;b e is theb9+ep9 z3n mte; itcw3 potential 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 moving an electron from point jywy b0gh pe. .;sq.y)A, where the potential is -50 V, to point B, wh egy.s wqjhy)y;0.p.bere 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 accelerated through an electric p 6abu ,4tecot.u)u z7d/ xtq9notential difference of 500 V. What is the kinetic energy of th ) 7ua 6n9xb,tczuutot/ q.d4ee 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, ig9 x14l biy8kps accelerated through an electric potential difference of 500 V. What is the speed of the protonp4bkl xigy 198?

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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 fa,b l+6 g2gsqp*wn3slb lls through a potential difference of 1200 V. Whq,*ssl6g wnb 32bl+gpat speed 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 movingvp;7ginu .-g2eau3l t $8.5 \times 10^{18} \; electrons$?

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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 as0 xm,e(f nky5ccelerated through a potential difference of 500 V. What is the fxsk,nym 0(e5velocity of the 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 mC. The object is acc 71 r17hbr/q2q kmnxbeelerated from rest through a potentqmrbr21qbe kn 7xh/71ial difference, 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 ti0ij*:vx:kr;v n)rs3 gushdh 0 x rd/8he electrical potential difference between two parallel metal plates separated bvv /sx 8;di )u*:ihjgxrnsr0k0 3r:dhy 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 directed parccbvw1c3c+ .zallel to the +x axis. If the potential at x = 5.0 m icwc cb13+c vz.s 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 of 50 N/C directed towaeedwm; 2urk: :rd the east. If the voltage measured relative t 2r ekdm:ewu:;o 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 the direction of an electric field of , ynnpu2+oz+ nmagnitude 3.0 V/m. What i+nz2p, uonyn +s 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 connectex xcck2-,gzq7 tfws4 6d to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electrow 67ksx,t2-c4fcq gx zn 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. jf9k1a -g8mg2 ygi d (iju5cq( An electron released from rest at a location 0.10 m from the negative plate. When the elec(ygggi fm5 u8-192 ikca jdjq(tron 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. Aqstqm1t-9 v.9 lpy 2pcn electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.050 m -9 q ttl1vmy q92cpps.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. I-2uv.+u5ekmh jp m6acf 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 meuj.2vka 6h+-5mcpu 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 tatb5 km2 xa d68i4 3aoo6hre*ghe east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltagk2mob8 iaxraa36o heg*5t64de 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 diff j8bwa )jfw t(h1jgq-0erence of 12 V, it will acquire a kinetic energy (in the absence of frictioq gbjha8(j ftw j-10)wn) 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 vmd8 cl:j:y,d 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 85nx:y7l( uz p 3vkuopare at the ends of a meter stick. Find the electrical potential for the center of the meter sokyn pl5(u8v x3upz:7tick.

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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 atu(,r qc7p pmo au,6, m/cg(jrv (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zuov6/cum7,q rag,( p( p,rcmjero 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 artt35d )vmz, lbm7 nz1alf1t9t (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 energy of a 1.0-nC charge at point (0, 4.fa1)1lnm9t3 b5 t ldvr,ztz7m0 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 chhm l2z.pq+2 bxarge is at (3.0 m, 0). If the potential is taken mbx2zq2lp.h + 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 are placed at the corners of a rectangle ogb,/ph) k1svqiy wu:1jc 1/enf 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 = 4.0 cm :v1b/e,uqhn1)yiwpc kj /1s g?

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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.) 1i5k btwqqy(-lk xub p.(it(0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolutetiw((- b (b5pxtl.i ykq)1kqu 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 (cys *8w7zokf) aharge +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 tc7o ih/6i8v kehree charges, each of 2.0 mC, at the corners of an equilateral triai eo/ 7chivk86ngle 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 ismw8 k 3w7icb1v charged to 100 mic7wwv3b81 kV?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate cap(/ ssrp:qs4b 8j5fwygnz3 lf1acitor has 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, a -flv-:mme48 av-fwy xkw043nn dzhs)nd the plates are separated by 0.050 mm. If the capacitance is 17.34- -w flvm30 -4ymf )n kwehvxad8zs:n 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 capacitot vrr;v*9jo w :0v:nf5c tvl/o6,poi xr 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 5.0 cm. If the potentiabl 8.g cuq; yb:)xid/gl difference between the plates is 2000 V, with the top plate at the higher potent.gl)d y;ibq/gcx8: ubial, 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 thb.z,:b* p f dktx53hjee battery fully charges the capacitor, the capacitor is immersed in transftjzf.bkhp3:x * 5,debormer 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 5 mx23lgk oj470nid eam46rwhtg h (6splaced on a 15 mF capacitor. How much energy is stored in the can g7aej5ihdm2s rhm6g xl(6tk 034o4wpacitor?

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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. Wubx1(/y rq e4ghat is the energy stored in the capacitx/byeg 1u(qr4 or?

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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 capacitor wheuz.5m zpl :li ,d(ihv*hry7;jn it is connected to a 12.0-V vd m:hl.i7i uzz y r*p,(;jhl5battery. How much work was done 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 rsji k mppqi2w92k2i+4;u gi4 $2.0 \times 10^{-3} \; J$ 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 capacitde*ih9q : 6c 2sn)vwchor 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 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 capn .ho ff7qw*d)acitor 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 con4kigq,9 1985x hz gkdnh sy)zrsists 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 mvvg/0:p:) /ffot 85huwcugz+ v(g oz 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 cond-d;4.e n ruowstructed 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 connecd 3qxc) b4mvt:r*l; zited 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 q:i bzx3cd*vtr; )m l4plates 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 battery and becomes fully 0 ubi32x(hpoecharged. The battery is removed and a slab of dielectric that completele(xo u03pih2b y 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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