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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 notzh3pvi 08tt z9g /zcwdyy 4wwp 3)rp,- 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 i81gydw tpta)(7 w9ef lw,3 xfhs a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminu),qupe zwz) j.m objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a zpq) zj uw,e.)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 dir6wo 8x j.havi k59wsn1ection 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 electrixt dl1t 1:mf rt/da./0:;fujljvk7 tgc 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 holee b1 7yt7xnu)low 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 ac/70im:oear7 s +hqzykcelerated 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 speeq/isreo+ y7m7h a 0:kzd 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 poim )ev5 v+riqq7nts 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 along an eqh35.pys+xv( jdasm l ,uipotential surface.3,yj( ds+mhxv 5a.p sl

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfay mjjxhv t )m:h5,fr83qw8 nq;ce 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 kf i) e;d)rlx4particle carrying a charge equal to that on the electron as a result of movi fxk) drle)4i;ng 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 uni- iwqbxtd-8;x sago9 /t 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 corjhqln 9yk.5. y7 jf2zlhhms:*responds 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 cewag3sy )wg-4harge is 100 V. What is the absolute potential 4.0 m away from ts- g )ew4ayw3ghe 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 dista3prqnzrs54km x. f)f7 nce of 2.0 m from a negative point charge is -100 V. What is the absolute f 5xrrm ps7.z k)q3f4npotential 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 3.0 d7,u-ou4 bu)iqa- onuu)gbz1V when a charge of +Q is located at one of the square's corners. What is the absoluzd-g b),1 obqiuo)u-u nau4 7ute 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 potentiale q w5 (,- zloqv0dh6om3i5fym at the center of a square is 3.0 V when a charge of +Q is located at one of the s(mfio q6ye3lv zmh50w -,dqo5quare'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 ld1qm hu i70o2are

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per voltho0/ f,tmxehcq c:x* 8 is 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 al+ 3htmsj 09h9ksxat 3re identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitaja0htmx9lt9 3s3hs+ knce

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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 capacitanc) 7+ /5f -(hyo:ivbrhxnj+al drbhh;ne of C. If the area of the plates is doubled and the distance between thlh -brhxn o7y) fnbha:5iv/jh;+ +(dre 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 parallh 1a h+ u6 x-o-dxeukm4 21zbd8c2kgtyel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potentib1 1k2d h4+e ga8ku6u mzxd--y2chx toal 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 of8u) n alae3ryst.oy71 a given capacitor is weakened, the capacitance of that capacitor)tu .7y aryn 8aeosl31

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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-plawv4 ao/fl*20y ufor /v6l5moup de .v;te capacitor are maintained with constant voltage by a battery as they are pullwm4/l/ fo*y05eupf 2vad;l6 orv .ouved 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 voltajrc. r2. :mfi8k0ym: q tymyj6ge by a battery as they are pulled apart. What happens to the strength of the electric fieldc6 : qy r:ijf.0mmrk2yjym8t. 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 for adding a dielectric m-+lu zfv7:lz a4dwva(aterial between the plates of a capacitor.7(a uv ad:+4 w-fvllzz
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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 beg3m5k;e rsn(vy40 be utween the plates of a capacitor. What happe( vkb nsy0eg3 ;um54rens 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 between then0- c;yna7usu plates of a capacitor holding a fixed charge. What h;ncu-uy0 a sn7appens 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 i,) -j.yu bqe stor;4gss connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the pl s jg.t- r4;boqyesu),ates 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 holding a constant charge causes the en .5yckj 82xyw /4/ttkcfvp /lpergy stored in that ctvcl /pxjyfwt y./2k k5p 48/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 causes7 kx)0 qiai8ti the energy stored in that capacitor toa)t0ki7 8ii qx

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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 energpk2h 6u.vp jmo7* 4efgy to move 10 C of charge from point A to point B. What is the potential difference*6p jvpg.h72fo kme4u 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 potemcnhm /e4ph7de d) hz 7+1tconhr1w 2:ntial is -50 V, to point B, where the potem ce2hwnnpt 1 h1r)47cd/mdzhh: e+o 7ntial 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 eler0di :u-./ eozj6ggjyctric potential difference of 500 V. What is the kinetic energy 0ir./- o dyjgugj:ez6of 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 thro0 yma/r9w w/pough an electric potential difference of 500 V. What iap/r9wom 0 w/ys the 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 a potential differenceea x91xy(ei47b a nq0z 7ov)ci of 1200 V. What speed does it acquiqe)y74izv1 ex ob ain9 a(c70xre?

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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 9l vh;k(+ **mmlqsol5em d ea/(.0 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 ain78v57;a8ozm vt -ikk, tbiz potential difference of 500 V. What is the velocity of the electr;t8mbani o77tkkzz-ivi5 v,8on 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 iqmy 8f;mn+wij8) r9mjs accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. W+w 8 mrj89yq j)i;mnfmhat 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 differe z5t-qy clb7(ynce between two parallel ltyyqzcb-5 7( metal plates separated 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 direct9ld o* uk2v6am0kjno 5ed parallel to the +x axis. 5kodmjlo n u0k2*a9v6If 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 vhcac6 w6t v54N/C directed toward the east. If the voltage measured w6v4hcvtac56 relative to 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 magnist9058kr9d l voeht bvq(g)-wtude 3.0 V/m. What ibd9oe v8rgs t)t9w(0h-klq 5 vs 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 by3kzl i5q4qxf gns(:ti q74uy8 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 1.50 m from the positive plate, what is the potential differenf4n8g5uqltq (7is qi kz y4:3xce 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 mtvt-hlp,5ibt n0(z z6, 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 platebtln,v(i thzz -065pt , 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 r4lx8vwd)aq9wb e96 o m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When th o9l4e9v 8wd)axb6wr qe 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/89lyt) i rbhspaz9 +596ye 3usihlit,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 voltage at a point 1. la9i3tsyi98tph h+r, z)sy6ub5li e90 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 direom5b1u uxmv/ ) ha;mls,jp3d 7cted toward the east. If the voltage measured relative to ground at a given point inb/,u5l)xs;v h7 udp m3amjo m1 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 a potential difference of 12 V, it will acqud:p-q ln:/00zalx e) i0mv x+j-xungu 4y/suoire a kinetic energy (in the absence of frict)xz-:xdniaqe/ l/pu +g -uj4xnylvs0m0u : 0oion) 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 dd-n88hse239z*o e 2df pzk bluistance 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 uzh98v5eoxoiv , ( c)fthe electrical potential for the center oi9oc ,zovu(vh8xf)5 ef 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 a y4bz;q/v; jhjt (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potentiaz;by /4 j;qjhvl 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 +u+xx4if(qj.vv4g7 t, uccc23bpv vwm, 0). If the potential is taken to be zero at infinity, what is the electriv v ut.(+fc +,pcqxjv4wxu4 cgv372bic 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 cz gqn5ljux1f8nu3 1zmj z0h71harge is at (3.0 m, 0). If the potential is taken to be zero at infinity, whuu1n xg7h8fm3z zj15 nj1q0lzat 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 rectry)x3vy r1ju *angle of 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 c)31xruv* yy jrm?

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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 diagonally op)k.6to8 mhk6jl9d+.i doajvsf4n8f eposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potent+jk df. oh 4 aj6ive.o9s)m nd6lt8fk8ial 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 vng8zf.+ g/nurge +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 three charge1 9,pthm);qbelc/aa cs, each of 2.0 mC, at the corners of an equilateral triangle of side 2qa;9c1a),bml/ hcte p.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 plateslm+mnwz i;7g;chbz)1 3-,s u xnsqyk8 of a 2.0-mF capacitor when it is charged to 100 V mih+z z-;3skns7n;w 8q ,1ug yc)mblx?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitoruyoiqz.,s .vo;)8nh7y4jn ym e9j/ui 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 wit/hf6jo6 to5idn* z2nih air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pj66f5io*2otih znd/n F, 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 udnoivl q wsc09 6ay(/a5q16fq1c,pdhas 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 platepd0cdn),8 r3kjw 6hz m separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potentdchd) 38 r6k0,wjmpzn ial, 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 batter ampgr s.:7- nzq2c9yey. After the battery fully charges the capacitor, the capacitor r:cns2 azey9.qg pm-7is 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 s3rz pkg zl(g.onn:z-c12 ,btmF capacitor. How much energy is stored in tc(.zz-zngo2lt sbr:k, np 3g1 he 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 energy stored in the n+6nv ,87n t)lpwjyvxcapacitorv+nj6n ytp8)ln 7x v,w?

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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 capacit42zq- ku)9qj di*f3ibuit j4bor when it is connected to a 12.0-V battery. How much work was done ini )ijb9f 2j44i uqqz*kbud3-t 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 thayb*mw9 zz,wv1 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 capacit5dww/.bhw m ss wwh-irj( qm/t+eu*)4or 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 capacrk/1lvz yz1t:7eta-mhwmlx ( c ua4 b589flj+itor 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 capaciton8 d t-otvi1(cr 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 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 plateom:x x sw h24u35r:ofy6zsnv9 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 consm;41p qgwcyw e,zqy18 rcb 69gtructed 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 aub.0q4colzl e.-3t tconnected 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 insertede l -.c0tzqbu3l 4a.ot?

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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 baxnd+ a.d ty9ic39j, h(x*r xkrttery and becomes fully charged. The battery is removed and a slab of dielectric that+xckd hr ,yrja.xx t 93d9(ni* 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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