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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 now7xq yphm94 x:t 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 is a n/wn7y ,xe3bu)q1 dyc

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum obj do;dq l,08*,lc xge* mij:ytxects are insulated from their surroundings. Object A has a net charge of excess e;i ,0 l:tmq d,8xo *gly*jedxclectrons. 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 of the electricf -7zh6 rxg9frr(pi1q 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 fie+ap( w qvn+,smld

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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 sphere. Thq1m*p f0i58q hv+serk ey

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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 tog2j 4fr 2onmiqr)c )cd84v 9ed a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed m fn ce)d4c4jri dq8o2) vrg29of 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 poin9c5vy q gdcdj08;j36y9xm4nh-k o hntts are 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 point A to point B alq-cfh,si 9o70snc-t fong an equipotential surface csif0--tn9, s c7hofq.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface 3ygj2dtq8 h6 3bjm4a amust 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 pnbh gr )kd2.-sarticle carrying a charge equal to that on the electron as a result of mobr nsh2k) g-.dving 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 unitlb)eb9;a e bfp1 4wt (f-bz+ql 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 corre21qipsttn ub0*)2z/ y 4uct+( riyhzupyj0 z* sponds 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 i-wvk7erkra. on009p a distance of 2.0 m from a positive point charge is 100 V. What is the absol .k9e 7nowk0r- avrip0ute 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 charge is -1ug dkn:hi y- ko*+gknz/7/z4x 00 V. What is the absolute+ ny-k/:4o7nxk*z ik u hdg/zg 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 t;o7ge0ac: ,st gk3 otche exact center of 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 sgt,:c;c7egt koas30 oquare'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 charge of +k3x *q rorji*ey3n8 7qy72pmiQ is located at one of the square's corners. What *n rx3j7 p *i7ykeqr3iq2ym8ois 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 co**tho+lny9b ibh 5fu(htp1s *nsist 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 i-/+zt:lp/.z3 hdde-t tmzu iis 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 capacitor rx ,wtmvaoy,/ 8x-a8bs are identical in every respect except that one has twice the plate area of the otheowr 8/-axbax ,v ,8tymr. 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. 5mvs8i.4 wfsbg7kqn0 If the area of the plates is doubled anw4gb.q8fn5skmis 70v d the distance 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 parallel-plate capacitor fultq;fcc8e ws.:2vqu h;ly and then is removed. The plates are immediately pulled apart. (With the batte:tvwuc;8f.cq 2 q e;shry 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 between the plates of a given capacitor is weya)n yme:rs,ym;cvrmyva6o y/c473 ,akened, the capacitance of that capacmrv7yn,y6 o, 3yv cc yasmm;:/e 4r)yaitor

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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 artd.i3qf 2v exb0o+eo g1f q89te maintained with constant voltage by a battery as they are.829 q 1+be3dg if0vqfxot toe 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 :w+1*/qawaujnw skeq.)(ktp with constant voltage by a battery as they are pulled apart. What happens to the strength ofu:)ak 1ea w*w/+jn.(qqkwp st 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 fori: vpybi)6 xsyya1a :(o+s2wt adding a dielectric material between the plates of a capacitor.2 6iyy 1t :sps:a+b waxo)i(yv
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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 v 5fa(c.w- bcvplaced between the plates of a capacitor. What happens to the capacitc.v(5 acv -fwbance?

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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 plates58p,j y1 kzm qgn*5j:r0 rypcc of a capacitor holding a fixedyrcrpj 0yk:*z,gnc m8j5qp 51 charge. What happens to the 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 jfdle ;(mg8:q 0 3wivtbattery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no c;g3lmt(w q vj0i :f8deharge 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 holding a constant g9f) *g;ri5l i(+txzrxgip 7ucharge causes the energy stored in that capaci(5p gg; +x)zxr lfg*it7ir 9uitor 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 7vhw npqx63q8causes the energy stored in that capacitor twq3 pq v6h8xn7o

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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 energjxa r jq8/r1-yy to move 10 C of charge from point A to point B. What is the potential difference between points A andr8j -/q axjr1y 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 y+./.mf yrom ipl,yu/point A, where the potential is -50 V, tof, mm/plo/+ yyy .ir.u 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 ay5hg3)ae b5n2ffz 1g :s(z loat rest, is accelerated through an electric potential difference of 500 V. What is the kinetic energy of the prot5sl) egyfnazg a: (5 3hf2obz1on?

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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 electricas mzlm5tjq,9v- .oi.)q1 sui potential difference of 500 V. What is the spejs qos9m v-..i )taqm,u z1i5led 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 g v5af43)0un(jstu me proton falls through a potential difference of 1200 V. What speed does it acquirenm3eu 0 s)gau 5t4vf(j?

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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 m2)x2ao; 5cm cer-f stxoving $8.5 \times 10^{18} \; electrons$?

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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 acsfac 6s217dgc celerated through a potential difference of 500 V. What is fs1 2cc7s6g dathe velocity 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 charg4gq 8cx wv km6) ,exn*lsk-u+xe of 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of thekkxgc)wu ,x6- n+8l* sqxvm4 e 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 ta/e m8 m771qwda6fh1 sdpzq)vwo parallel metal plates separated by 1.0 mm. What is the electric fie6swd /a77f8 p 1qqevh)1d zammld 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 magnitudph-0n p:fxwpn 9ps*1xyf ri5 2-ie)tt e of 500 V/m, is directed parallel to the1r 2 -yh0wpni*:i t59n-e fsxp)xtpfp +x axis. If the 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 ofb;nv)ke f,( vn 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m kve; b)nfnv, (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 m;t/ain7 tn g5bagnitude 3.0 V/m. What is the change in kinetic energy of the prot7i 5ga/nbttn ;on?

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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 connek8t5an 3)rjb6wp/zyqcted 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 1.50 m from the positive plate, what is the potential difference between the initial and )q83 rky ajt p5bz/n6wfinal 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, seifat8d 1l2fl.parated 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 pda. 1iltf8fl2late. 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 0.20v i.rfkq(c*c 2eyt p6xvjn-*. 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 aifx.t*. rn*k cp2yve(cv6j q- 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 fieaqr; x9zcqffkmr4 551v, yxb,ld 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 volt q5vfq;mb,zr 1cx,afkr59 x4 yage 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 direct7:se, v0gejsg 3ng.nhed toward the east. If the voltage measured relative to ground at a given point in the fie,03sg.jgh7vgnes: n eld 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 ogsom / 1(65gcvdo(n. mb8bsb potential difference of 12 V, it will acquire a kinetgngs.o1c8md(6 s5m/vob (obbic 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 potential at a distancg3 rgwj:ay)vy ce8 j :yu,(;hbe 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 ele am 1-elw 3hx7mhe+cr5z,s:u ;ey)ld yctrical potential for the ahs1 wec mhy5z ;m7)3dre +-lu ly,e:xcenter 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 atr cjcpi-85vr16f)tvk (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is takkc)6 c 1j-ivr5pvt r8fen to be 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 ah1py3 373e ye7jvq,5a/bnb)xwue hs z -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 3731/v7 e esqy3)puhhjzwn5bb e ayx, 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) andnj*t l6*4 aw1gdzj- kh a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to point (0,dg6-l w*kjzatj4*1 n h 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 of side(hajfogmw*/z 8. g vog 6, sqof:xp03ts a and b. What is the potential at 0:oogothv6f,.3 mga/8pxf*q gzsjw( 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 two diht lo0c xn,t uy,/m9d;nb2y4u agonally opposite corners. In the other two corners are placed cha9 04hubod yux,ncy, tm/;ltn2rges of +3.0 mC 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 +2e+t,t7f bor2ns, 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 necessarqkyr/zy1 hhlwu:g2;y2 1t07 ickw 4zky to place three charges, each of 2.0 mC, at the corners o4y70: zcyg 2wk1 izl; ruy 2htk/khq1wf 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 charged to 10bz w8 po b;he.*ighv580h bh zp8.b5*;igw8 veo 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 mjjk2b.is;bcc u-dh3k88*mmhas 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 separatcj3dwmp2uoy:8vn 9m.vk. 6 cgmx 6. brc-x+rqed by 0.050 mm. If the c2ycdrvx m:+jugm6..3rnb6 8kwc9mcp -ovqx .apacitance is 17.3 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 capacitor has plates offo4umy x15 zdf6m3b6.qdvs / g 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. I*mbimcb5(w 3y0 urek2f the potential difference between the plates is 2000 V, with the t2ecib*(5mw k3 mruy0bop 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 ispim zfab2noc7v 2-u17 connected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much addz2i vc1f m27aou7-bn pitional 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 muc17v5oo lyl5b mtsn*z qc4kp-+h energy is stored in cvo4q-o*51b p+l7 msk5nyz tlthe 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 energy0 h5;exxdamr+-ye9/txj 8mlv9 ot k)b stored in the capacitor?-+ krxxbj98;ht )avoeet/lx95y0m dm

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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 is h5 p4 a gm*zo- 5f;g9enpe)*hgkmmgh9connected to a 12.0-V battery. How much work wzmnmo54)af -p ph*59hge;*m9ggg he k as 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 capacitorxx(f/bg+f 2 jc is 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 consists of plates of areae+mxv 3n4g-4y3anyjs5pb b p 2 $1.5 \times 10^{-4} \; m^{2}$ 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 platmj +q9ikqy*eelf9s,: z )fkv(es 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 co1vw26 yp nev5hnsists 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 (bv+ rp7g;1 ph-pvvlv 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 constructed with pla ;4qyzltl 5/yete 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 b9 l,c;ali1ci50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the spac,ll c;1 ii9acbe 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 battery and becomes fully chargedlm,p)sf x1a- 9qs gf6 +-yt,.ozqwcxr . 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 volta6,x qftym-+wsfr cao -g. sp,z1lq)x9ge across the capacitor's plates after the slab is inserted?

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