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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: 游客未登录  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 nqj d2k h.zj;gt4:zy(is 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 coulombslviz+s rv 0 ;6x,rh)v 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 objects are insufpj0ff;+ :yrvoc,d;x lated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is ; ,+vpfdc ;rfoxf:0j yat 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 o157 ndhonv 3yk+kty *dl: dsf9+(qi gjf 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 l wfn1bh1-i) fri e8 n0 y6wi;zpjoc2(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 sphere. Th4lf yj6+ r clqn:g.t(ney

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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 frok8 mfn)d0e (dfhxl uyx4e86e-m rest to a speed v by a 500 V potential difference. If the potential difference is changed8u)f486nlxfk-e m (xe0dyhe d 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 p.j 2k rnlny7g 1gy,ajn/ 0i7d .eax4lis 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 pocpcjmiwpke( tl7mq0:aix 4/80 m) 3gnint B along an equipotential surface.m8x/iigtlm:4 p w n(c jkcp)m003qa7e

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface ge1ec;bn hv6 3must 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 paulhsos - +n3f gb8guxru0:76 jrticle carrying a charge equal to that on the electron as a result of moving through a potential difference of on8 6gfl0 uu-sh+7j nogxu3:srbe 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 uni7oxi5sm :vr/:pjz 1tst 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 correspon1jb s be e0m346jyzu/eds 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 2.0 m from a positive point charge is 10f)yqchsd)zn3 vg9r.q5uo ,d ed sef+-5 o3n/e0 V. What is the absolute potentize5n 5., s/+)fedg fn9eq d-couqvd3 o)hsy3ral 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(/yi.-gm wzxs -100 V. What is the absolute potenti-misyw g(x. z/al 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 cenbu33alk0 nk84 ag 2ewmter 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 square's center when each of the other corners is also filled with a charge of +Q?w glka0 4a82nk3m3eu b

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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 ,joddp3o kl4 ijh-;5sof +Q is located at one of the square's corners. What is the absolute potential at the square's center whehdjo54pj3,;i- ol skd n 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 t nfkd zud/68h+x y+/sdwo 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 is ac o::ej ,szcw2

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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 onlg2;6yorg8m : )byoyr4n(knle has twice the plate area of the other. If the smallerglry ( mo;y4)6k2l no8nyr: gb 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 ofa6xv2e /.2 fsvq 1f u8lmp1zir the plates is doubled and the distance between the plates is halved, whvx m /ifu.evpa2r21 f1slz86q at 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 removex9c 7ba-i 1svwd. 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 bein -ibs7w c1xv9ag 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 betlh8 kktph0+o )ween the plates of a given capacitor is weakened, the capacitance op8th0o+) hl kkf 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 consta8;c) +aqe4s k fy2zhinnt voltage by a battery as they are pulled apart. During this procaz+ifhk4eq c;)sy8n 2 ess, 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 wsv+wp *cuwa ;4ith constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this4* +pv;awcsuw 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 9 :: (b3fmeeqytxp: 8mxqr*/xu tvc*ymaterial between the plates of a capacitoymfp :xt e:3*9v r*xt ubq:c/m8qyx(er.
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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 plk*qdr. j2an6u 84idnt n/rl)d aced between the plates of a capacitor.r. n8*q6j )nlktra2dndu4d/ i What happens 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 placed betwee 6lk; c2x u1jxyc6+1 xppzxlw.n the plates of a capacitor holding a fixed charge. What p6 x +x6cxu 1xk c2pzyw;.l1jlhappens 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(yt j wybe)a*vnej)6p,w:;lo a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The ene*le: wytvy(n,j paw )ebj)6 ;orgy 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 dnj k v0hv.s80k h;d0 bms3.izarzk5/ of a capacitor holding a constant charge causes the energy s nz0i /d3.z5bvs s8hjkr0 v0dh.m;k aktored in that capacitor 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 energy:b-- giw y9yzy stored in that ca9-wzyb: y-yigpacitor 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 x.1g y , m3nf(labfo5xpoint B. What is thxf a,f gb 5x3.(ymlon1e 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 poin mgfff f/8mzz. 3u5fv-t A, where the potential is -50 V, to point fuz .f5mf/3 vfm8gf-zB, 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 an electric potential d + *bkr;u.fp vmvi gp+ar/e4ja3c7c 2qiffere2kf pcuvbag 3a4j ;+ 7.*ermvcr +ip/qnce of 500 V. What is the kinetic energy 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 throwh7 3s srxy1*kugh an electric potential difference of 500 V. What is thes3h7sw1 *k xyr 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 4akp7,ybb kh5a potential difference of 1200 V. Whaby 4b5 h7pakk,t 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 9.04 r 0zshnwl,mkdt80i*:qgz0i 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 diffee;6m aj(u;p7wuomdh :qf3 20ezokk b:rence of 500 V. What is the velocity of the electron aftmk3 2opmzf a(;:j :k0oqwu 7;6ubh eederward?

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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 rest;8j1 fmu8u4 .qa(pzzcmi xgjtp 9f) 7n through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the pot98j j n ;)4fgz pt1c7mpz8.xfa( umquiential 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 bett-1dk-rfj 0osq-( fnb ween two parallel metal plates separated by 1.0 mm. What is the electric fiet-(-s r n1odfkbjq- 0fld 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 fih..xg-nx b(rw d:1sxweld, with a magnitude of 500 V/m, is directed parallel to the +x anr.b xh x1w d:sw(gx.-xis. 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 of 50 N/C directedw qdj9c g+9td7kfclnqdh(gu4:p d3vm+x ; -5e 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 directly west of that cugd;nf4d k79 tp:5(+ql-dvch 3+gxj9e mwdqpoint?

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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 alodjh+7 dae:1 86k.rwqphir l oup)4x)qng the direction of an electric field of magnitude 3.0 V/m. What dxldpw 4ioa8j ))+q 7 ekrqphh6:u. 1ris 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 connected to a 12-jfb 9lou0y,z1V battery. An electron released from rest at a location 0.10 m from the negabu,1 0jyol9zf tive plate. 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, seppmz p ):j47rt*j8lntk8,xmybarated by 0.20 m, are connected to a 12-V battery. An electm)kpjjy *,l rpnt8zm:x 8 t4b7ron 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 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 colm8 v) r(86:raqwzn ysnnected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. 8vn(y m68:l rwq)rsza 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 ; nb 0jj8 0chojdl/cd5the east. If the voltage m5 ;0c08jo lhjdn/jbc deasured relative to ground at a given 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 50 N/C directed toward tz 66/cj2gaxx3i5ga*wjkq z7 ehe east. If the voltage measured re 2jx3 z67x5awejck*z/i gq6galative to 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 through,bk bv6 psvr:0gy xa81 a potential difference of 12 V, it will acquire a kinetic energy (i0vx6, gkpasb:b 81vryn 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 di-rwobj8u8h18rn;g px zk 6 zy+stance 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 electrica 77px gf:xoi crw4)w2el potential for the center of the meter stick:7ow2e4wgf pr xi7xc) .

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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 cjxol9q9ig ;s*/tksy+ ihq9 6 eharge is at (3.0 m, 0). If the potential is taken to be zero at infinitiqtg;/x6+lyikh9*s 9j o9s qey, 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.di3i).si td t +t/ho3a0-nC charge is at (3.0 m, 0). If the potentidtti /+d33siat). oihal is taken to be zero at infinity, what is the electric potential 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)+basm+x yia,rw122wwm:dj- i-b7mi ; imj ,u q. If the potential is taken to be zero at infinity, what is the work required to bri;+mi 1+ r,s-aj2m-ji xmbq,aiy mwui dw:wb72ng 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 r 5gik0cwj/ fglxpv071ectangle of sides a and b. What is the potential at the center of the g pkxc150gwv7if l 0/jrectangle 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 +qa-*ve9 vc m6ubc cynv9:xx ke03 zm+a side. Charges of +4.0 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 absolute potential in the z *3xeqnm+096ya-9x cvub cvev:+ckm 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, masj1ulk we /xnxd5+4mnt1a6iek z.wag 7ao53- i s $6.64 \times 10^{-27} \; kg$) 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 three charges, each of 2.0 mC, at t*b62 em 2 tle1xts8byi+mevx8d5zj7(gzm-hp he corne im8b2 8d5 (1 vb e7pzgtzyex6s*mt- 2xehl+mjrs 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 pls(2 ima;jds l wp:w9+zates of a 2.0-mF capacitor when it is charged to 100 Vs m+(9wjidp; w :azl2s?

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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 arjb siffu;,6s12roc n/ea $0.50 \; m^{2}$ 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 separagg8 :ypo c yx1b4mr /-/c/6zd ogzmop+ted by 0.050 mm. Io-+/gzg1mg8bxc6p4ormy : /y/ ocdpzf the capacitance 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 of areayu8su klw6ex.l )39 ahuw;x -6 g.mzem $0.20 \; m^{2}$ 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 potentiaym ,cxtzzqcw8 ,.m5r 1ut ,oi6l dif ,,c8wqxoim 15ucy .zt,6rmtzference between the plates is 2000 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 connected acd;jpty8 *,cl 2ii*vehross a 100-V battery. After the battery fully charges the capacitor, the capacitordie ;82*ythpjcli ,v* 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. Ho)ii 23qi9hcglf-hvf4o 4(dmzw much energy is stored in thf)h2hl3fcv4qg z- ii m( 4i9doe 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 energ8tu/82tomts* zhng3 din+6q ay stored in the capacitor?nsdz*8t6g2o 8/nmhqa ui3 tt+

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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 c5 *phg-f e46ikb5o xgiapacitor when it is connected to a 12.0-V battery. How much work was done in charging thif-hxgk5bi e6 *go4i5 ps 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 i.z:+8vzxk:+-rdi2g axp k q f4bkb )oft 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 c-/ss4 o lyzx)f9z2q3;j vooqof 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 capacitor consists of plates o1qsfym: k.kif h a 5z6eqb xg681v)i)gf 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 cou tk3-w1+ dnq :8cynmcnsists 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 widkfcs1 6 cavc() 2e2vyth 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 constro:e j)/eqd+m(/ km upcq 8grr--cuyt9 ucted 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 connected to a 50-V battery anpru 2egk7y)a 8d 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 ap)r2 ueg8y ka7 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 fuj0v6+ n hsyav5lly charged. The battery is removed and a slab of vj0v+ ay6s5 hndielectric that completely 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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