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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 v3)zw*unvj*mb ector?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomx i2+uyb 7rdxoec,8(iwp* uk2 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 vs2uzdvxzw v/+a.0 zbwo)6 q8objects are insulated from their surroundings. Object A has a net charge of ex0zabq sz 6) vd/v z+.owv8xwu2cess electrons. 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 ofl5tltss7nrjk 1 3uq uxbuv7*). 5.7utt /ubvc 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 zmfz14we+ p t xhc9 +6nen)l6oelectric 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 / nq3 +/4 q:1charuxz-gk-tpuj rmea9 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+b h)lt0:x9 gmtnpv2f ik; v0o 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 new speed of fvlt;xn)mt+ 0p2 hv:oik0g9b 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 atq-4/7 8kdfs-vgezfv f 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 point A ttor)3dqz7/k8 amh z;8) khbhbo point B along an equipotential surfaceabok;rd mztz8/kh )qh3h8)7b.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface oq1:0lpvp7 xcm5ja9 ,vimbq/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 charge equal to that on )z8 qt )cgljoi .6ngt8f.qa 7q,v/gx wthe electron as a resulto,gtl6tz)ijwq7. q8afg .cx v/) qg8n 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 a unit oco3 um(;7+hi9 8 cikmkrv)bhbf

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corhwc5/:,2d w87lemezcb4 uq 9lvr m3tsresponds 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 2.4xydy .u z0xnub:(py4 0 m from a positive point charge is 100 V. What is the absolute y4b x0(:ud yznupyx .4potential 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 mdcc71 ne *yf6n from a negative point charge is -100 V. What is the absod71 *en6fycnclute 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 5zwcuvv 7lkp d g ;xy8(ssi((63.0 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 the other corners is also filled with a charg86pzvx vslucdks; (yi5 (g7(we 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 centa /+qxkrvtn/1 cx, (fxer of a square is 3.0 V when a charge of +Q is located at one of xr+x/av 1 t/qxfkc(, nthe square'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 two charges that arm(:bzntlx.-es is7 ,ee

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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 ad7h-y 2f qt jtx(n i,fxpw/-yh5+;p nis 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 every respect except that one la- xfuz*p j55psli5jha4(9r has twice the plate area of the ot fz jru *x(p5ash-4lp9 5j5ilaher. 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 capacitance of C. If the area of the platehuwki,o(/0l c s is doubled and the distance between theo(/cl ,i0wuk h 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 remo mc(mnuiub*97 ved. 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 bcm (uui 7*9nmseparated?

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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 weakenedp,awj8 *ns,zen fc,y4m pnqi3-og *z(, the capacitance of that capacito igo -npcy*m4nj* zqezs8(pa, ,3 n,fwr

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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 wit 47(jl (yytqlkgq lm.m53 k;a bhf98suh constant voltage by a batte.b879 qlyuj ksgfh (t m 3;qlymak45(lry 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 maintained with constant voltagahx89(vuhg efy (/c c fn)au3-e by a battery as they are pulled apart. What happens to the strength of the electric field duri9 c/h8h v((3yec fu)aaxnu-fgng 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 lsq zh;)/ap( tp ;e*tothe plates of a capacia/t (s*p zp)q;;e lhtotor.
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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 betwefo+(7m miayf8en the plates of a capacitor. What happens to the capacitanm(o8im7yf+f ace?

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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 thefdmaa5csv r4s;2k , yo/8fv3d plates of a capacitor holding a fixed charge. What happens to the electric fielokryd af 4ss25va 8d/;f,3cmvd 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 full9 9 o(o7do q5jykfg:pwy charged. The capacitor is tkp9ow:7fq g y (95doojhen 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 capacitor hold*z;m)+ok(3uu)dg ss z1nx v qwos6 d6cing a constant charge causes the energy stored in that cap*o 6ousdx(g kdznm 3s 1+ vwu6s;c)qz)acitor 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 caus)6a s b)uix6uaes the energy stored in that cua )sb6u )ixa6apacitor 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 froa4jnemr / 25w0ehi7pem point A to point B. What is the pe0epm52wj/ nr h7e4aiotential 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 A, where the pot pd 2kmz8xqq.9ential is -50 V, to xd z89q.mq2pk point B, where 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 atvpha(5ds gr :q(*un4)fnj2f n electric potential difference of 500 V. What is the kinetic energy of the proton?hvu f(*:nr5as t) dpf(qg 4jn2

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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 accelerateh2bk/:o bo(g gd through an electric potential difference of 500 V. What is the speed hg:o2obk( g/bof 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 diffey1kre + )8uwherence of 1200 V. What speed does it acquire?uk18hw)er + ey

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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 d ey,hu.zb6u8z: vttf45a4p nko 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 potengf+x l r(-df,btial difference of 500 V. What is the velocity of the electron afterward?,bgr+l-xfd(f

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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 ar pw7g edrc 2wc3j(88g charge of 20 mC. The object is accelerated from rest through a potential diff8c wjdg 872regpw(c3rerence, 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 (+ 4ff*0brwleg-dbg rthe electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field -d0e gg b+rwb(*flfr4 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 parallel to t dei33vhb04fjhe +x axis. If theeidfjb0 3h 43v potential at x = 5.0 m is 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 directedz1ig1 z( 9g jq;s9vmhc toward the east. If the voltage measured relative to ground at a given poin99v1qmz1g(sjzi gh c ;t 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 fie*syx aawlg9wbrj4 6(,ld of magnitude 3.0 V/m. What is the change in kblras9x ,(y w6*wag 4jinetic 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 br064 q 1wagzdl )ru9e/8q jecv:plj .battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives p 0cq w1)e/rbj :eljvqd9ga.r8zu4l6at 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, separat70wwxt8g onc+hhi n p5b*d3i. ed 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 plate, how nwhwdi b*o.7gihtx+np5 83c0 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 tou 7e g pa1u,xpz8tjaazv;,t,f7no6b9 a 12-V battery. An electron released from rest at a location 0.10 m from the negativ1 7,abf,tzp9 x;a unao6u gzp,tje78ve 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 d((t3bn cy2 ak a(m4ebdirected toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the vo2k(e bad4(mb 3ny(tc altage 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. 0u+m1ns nq.huhaj5yy8 9n(giIf the voltage measured relative to ground at a given point in the field is 80 u yai hn n+ns58.j1g09 ymhuq(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 w4ebpvro 5 q*,w ao.y7yill acquire a kinetic energy (in the absence ofqebwvyo475ory . ,a p* 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 2kr7vuch6vfqct-+mic i5/j6 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. Find the electricall6x h c,co(-p3t wlp;j potential for the center of the meter-wt px,l3c (c;hlp 6jo 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 (3.0mb1ypc iqs2tc,yo/0r; ,8cgu m, 0). If the potential is taken to be zero at infinity, what is the electric po bum8gqcc c,;ryt120/i,y postential 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 aq91,/i-,ywobfj f2a imh3ey r -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 poinf fq - h2 io,b31,ymryj/ai9ewt (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 (3.0 m, 0). Izw)na;zb g,d,e0 mjj1f the potential is taken to be zero at infinit n,zzj0web1ja;)dmg ,y, 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 wruuxmox*x8k( gy 7b+ 1wx*9ncharge +q are placed at the corners of a rectangle of sides a and b. What is txxw (u b+gxron8m*k9 w7u* x1yhe 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 mCld 6.ubbf- hbshi1 3j7 are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC a 3h7ibfbjld ub.-6h1s nd -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 (cha p9c pdp+ a*:j;3exsdb/f(pwg rge +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 thvbh0eemc ,8ni yg a(45ree charges, each of 2.0 mC, at the cornev4eg0an cby, i85hem (rs of an equilateral 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 is charge;bom- zd6(n) cyh*r27gytrc md to 10dh(6yy z -m;m)cc gt2bo7nrr *0 V?

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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*e.2pff vhx ps-s 3u4b 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, an t:eyuj8rz wklm yf0l42bj+v6/rk)f - d the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the f-lzle +vb4y 0ry:)j2fr/u86kwjk tm 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 (vvitgl74 dqsxnt3 zpu16 d--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 pot7d/u l1,pauy f4,jhdnential difference between the plates is f/udh,,pjuya4ln 1d 72000 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 coguth2 / q6pq 7kdcfelqp*(n64nnected across a 100-V battery. After the battery fully charges the cap6 * 4lg7dp/2qck6qnute(qhpfacitor, 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. Howueceu0ev;os7mp .1pr 5el 41q much energy is stored in t1meo4cee u1l q; pu57verps .0he 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 :z2hj :agil 1fwf9a0v15 mF capacitor. What is the energy stored in the capacitfvfziw2hlg:a0: 9 a1 jor?

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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 when it s3yinb1j)qg4 is connected to a 12.0-V battery. How much work was done in charging this capacitgb3jyi 1sq 4n)or?

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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 nc 1mru//y8axis charged 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 co2sbr;,cwd o) 6vem,owp;f-nv nsists 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 capacio 0(u/ymj1 *worm8qsqu 0hbl 0tor 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 consistm/vi)zxa9g b4;pmjt ; s 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 ae+6kn 47vca a nwamy28rea 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 ; kodc1nx/ xhw7the .9plate 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 csy(0 -qx,,7lfcbmgo nonnected 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 capacitor after the slab is inserte nxy0,sc, -ol7gbqm (fd?

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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 q krz:,q6ipr2 :uaud67 q g(yvbattery 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 is6prgz:r q (i:v2,6qqu kadu7 y the voltage across the capacitor's plates after the slab is inserted?

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