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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 is hwf :qw1yuu9k9en+tp2de; ( 1d3o yie 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 i,p 2rf :jca+kzs 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 insul8snjj ps0)m;gn8d i8dsr6d j f(7)c5v f biu+rated from their surroundings. Object A has a net charge of excess elecd ui5 ndr0cr 8s87gj;)()fv6j8f+ p idjs mbnstrons. 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 dxef (4jd uf*rmh:+w -birection 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 movib;8 ,bnv/a4t7njsduhz s +w7nng 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 sdcc52rkx lwn) ;rs:(nq 8z;xv phere. 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 re 15eo0xa7 as 4sjqed ijhkq -e,on:08xst to a speed v by a 500 V potential oxose:kj4 ha 7 0ne1q0 de8j qx,-a5isdifference. If the potential 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 are at the same po ,o fh02stn.untential 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 fs5t0,..nvyrxc vebd(rom point A to point B along an equipotential surface.yv xn,t (rv.5dscb.e0

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must bn8r:uy5ynb7uh j-h +/q3tbty e

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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 the electaqu/p r)suxxl3. 4+ykron as a result of moving through a potential difference of one volt is referred to asup4yq3a+ rxx /lsk.)u

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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 lh,ulp/;f5z funit 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 corresponwx: vv3nylch 23jr28 rds 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 distancf0t 1: zjlorwll k5,l 7.:eomop4m4kne of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.5zorj pl l,mk4kown7 :4.0 melo 1t:lf0 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 fra4h0k+ zauf*j.qr 9 tdom a negative point charge is -100 V. What is the absolute pote rqaatj9*h4kz+0 f. udntial 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 izaf 6*x35yy jexact center of a square is 3.0 V when a charge of +Q is located at one of the square's3i5* yjzyf x6a corners. What is the absolute potential at the square'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 jhv :6q3qm*xobp .,bois 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolutqp vo*b,3b:h 6.qoxj me 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 jcvqb10* p 7rpcharges 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 aph f+5 y(kvk:nf c97yk

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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 respf9,81rmkov7 ilz tu*ject except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger m vulf8zk 1tr,i79*ojone 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 thesevp .iqg jn55t, u2l- plates is doubled and the distancqjs5np. 52gl,u -v teie 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 fully and then is 9illw* /v sim eaa901lremoved. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potentias90ml a*wi1ivl9 /elal 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 weu 2l+j;z 1g2 vpwh p-klvivq-,akened, the capacitance of that p1qkp+- h zvljl22;ui gv-,vwcapacitor

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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 voltage n/lb*t9 5-p3 8 iylar(: k h.ivffsivrby a battery as they are pulled apart. During this process, the amount of charge on i t5v 9 b*-8rlrl./hfnivkf( is y3ap: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 cons 7ezp)i bz(-zsh j(icr*zqc+ /tant voltage by a battery as they are pulled apart. What happens to the strength of the electric field d -chq j(ziz ()z b7z+ic*rsep/uring 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 x 4zqs27vyu3;z5k umg dielectric material between the plates of a capacitog m3257 4;kzsvzquyuxr.
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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 m(tb 6zr q)v:dcapacitor. What happens to the d)v rm b(tz:6qcapacitance?

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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 ( b-7 moj0.nzbkz7umhpaper is placed between the plates of a capacitor holding a fixed charge. What happens to the electriub. (7zznokb jm0h- m7c 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 connect6:7fsyig, w-v m cmil xu,7a0ced to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is i,m,-7m fa 07vgc lsc6u wyx:iincreased 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 holding a constant charge causes thepfui(;b y1rk+14abki energy stored in that capacito;+bk(4 y ufi1abipr1 kr 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 causeej l*2 .m* : tx2*7im:dlhxkz-d qbokus the energy stored in that capacitor*dik. tzmb :dx2 ox:l- qkhuj*2l*e 7m 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 .hc, deiv)6nm1b0usx59on ng of charge from point A to point B. What is the potential difference bdneb 1niu9omvs g50.ch6x) ,netween 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 pdr4i 7/gety745wo 0edqaw k+boint A, where the potential is -50 V, to point B, be+a/4d 4rdkow77 0qgi eyt5wwhere 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 potenes-kww- z *f:mtial difference of 500 V. What is the kinetic enekzww f-:e-*ms rgy 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 electric potwww3lbz6 nbr+z9a1;dw( h6-uard yp : ential difference of 500 V. What is the speed of thbw19lw;+w yd(a3az:dw z hn66r- prub e 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* r3xm, /dqhdz through a potential difference of 1200 V. What speed do ,qzm3rdhx /d*es 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 843khyofe jsjd.5o:3:ky --tb bgfz gV 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 acc6s dxc9mly ju0:ixnnd+: 8 y3eelerated through a potential difference of 500 V. What is tn+yx3edsj0 d8: c uxi9:6 ymlnhe 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 charge of 20 mC. The object is accelerated from f 1m bh j.-fc/zslk02yrest through a potential difference, and afterward the ball is moving at 2.0 .j-zkh2l csy0/fb mf1m/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 diffpa .;p8rdch;e88-mc qcuu 3urerence between two parallel metal plates see; acrcq883rup u;.cp- dmu8hparated 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 directed p ygd b(.v4a3awarallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the abwa3gy d4 (v.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 towaruic8it, )xj m5o/tk+/)kjwzod the east. If the voltage measured relative to gro)+ojtmiuc)/ ij/5k kztxow,8und 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 ekvw64w0wte: of magnitude 3.0 V/m. What is the change i60wwke4:t w ven 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, ar a7jet).qavg-kh80r idh3le(e 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 1.50 m from the positive plate, wg7.-ev3jr hl ktda (8h e)0qiahat 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 conneci q-;rzw4 fu*i:3 ulexted to a 12-V battery. An electron released from rest at a location 0.10 m from the n;i zx :4wquur-if3l*eegative 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, szqu;uv9 3xv55*w xmware connected to a 12-V battery. An ev5xuq ;m 3s9* v5wuzxwlectron 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, 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 direcb (oi k4mpex3,ted toward the east. If the voltage measured relative to ground at a gi(o4e , kxm3bipven point in the field is 80 V, what is the voltage 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 5027 )x t*4*onrbeeoz va N/C directed toward the east. If the voltage measured relative tonxeo etor)*4zbv2* a7 ground 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 througm pg(adgf 6b0z3 ivf;1h a potential difference of 12 V, it will acquire a kinetic energy (in the absence of frictma;6 0fg vfz1d3bi(pgion) 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 diso)m, k.ngeppr- l;3w vtance 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. Ffb,wc9 :c(q kmw*l s(hind the electrical potenlhc:m( s(w w9,ck*b fqtial for the center 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 at (3.0 m, 0). If the pot 3oko oqq4ix79ential is taken to be zero at infinity, what is the electri oo34q7oi9kxqc 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 is at (3.0 m, 0). If the pot1ev668fky,upb+elvpk. sva+0 km9c w ential is taken to be zero at infinity, what is the electric potential.6uk pecvb8e0+s6kv9m y+l k, a fv1wp energy of 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 (3.0 m, 0). If the peow7wco clh69 b / 8v2:,nz jmeu0;lqhotential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to point (0,6c;z7c,ehobw vnu:he l /j q2o809wlm 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 plac/7(b0k 2zx7 q unrmqh xqmuhn))f9;zg ed at the corners of a rectangle of sides a and b. What is the potential at the center of th)huu7 g/qfn2mrbmz)0xx q9qnh z ;k(7e 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 plorn6ljir 05edl a 9,r;aced in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolune r,rld a;6l9jo50ir te 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 (char p gw20ak q9fk20p.cxrge +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 necessartw)mx0:onez 7y to place three charges, each of 2.0 mC, at the corners of an:emtz xno7w0 ) 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 toz h1ts j:hwwt y5:i .gqq7.;hg 10gwzi;tw sht:y:h7 jq .1 .qhg50 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 has plates of area+ev7 icm6-s,bkshft) $0.50 \; m^{2}$ 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, :brxx8nm* 0ib and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate :8mxni0*rb bx 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 cap8* mf 1mo;jcbhwv0,x,. xecd wk 6zj/qacitor 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 offfr klucbuk1p + 2:.h* 5.0 cm. If the potential difference between the plates is 2000 Vb1 hpr.:u2lk+ucff* k, 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 connected acron8 6vgvz: pyp*ss a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformv gp: v8p*nzy6er 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 is sto5 b3zni l4v.he5)c j vvl0lp1pk8ppz9red in thv ljlbel8z5pk5p9hvpc vp z314i0).ne 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 i8d.o76,qy avu-lshzmy q7khrt4 l)/ mF capacitor. What is the energy stored in the capacitot)dz mh-hi sy.,8a/7r q6y qklo74vlur?

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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 whefnlyftu w 9++ ,:hefz,-rjqg( n it is connected to a 12.0-V battery. Howfyj9 ,+t-+re u: hfzwnf(lqg , 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 thaf i .0/o/o;+g ude/zar xkv5l4qbfmx.t 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 plateltsz2a8zp 5 p*.,4wvap cv no d6d(.fhs 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 pl*,q;jcczonx 6df2 aq a/ ;dw*lates 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 ofnvqx).pd t-a - 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 capacitor3ea yqaf 88ti0 is 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 constructed with plate area oe2b q/twf73omf $0.40 \; m^{2}$ 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 batt1e5 u8 ti.cuxzdc81 mfery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the platesediumxfc . 81tc8zu15 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 batt;dvmibk)n*9 z b 7qm6fery 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 voltage acd;*n)v79z6b im mqb kfross the capacitor's plates after the slab is inserted?

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