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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 followinucdx3uy1vi a/ 3n,nk. g 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 coulomb is a ytr8 6s;b,hcoz7mxb8

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum objer6y2w;tsy l a,cts are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which obj6l ywy ,art;2sect 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 electz+vu .7qjnu0*vz wm,kric 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 iwl4(x0p,o.e(y y hitfn 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 conuqu;-*idgh/4e 2 va kcr8hg; nducting 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 accelerated from rest to agv ri1( +im(zv speed v by a 500 V potential difference. If the potential difference is changedm+vgriv (i1(z 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 theac/.+h/ hem; yksvb8k 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 poin 3p-ymo- nme,it B along an equipotential surface.mpe- ym3io-n,

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfagq(, +d8 4 jpsem(9twys8hvuhce 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 30:l5qgf0alpx f zd- qcarrying a charge equal to that on the electron as a result of moving through :d 0x30aff5z-p qlgqla 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 of 1sxh/rf:fbv60h l5 xn

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspon fgaon8/kp1gngx58wp *0/spldz + ntqy*y82wds 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 from5c l.qh 3 .,dkv0dctve a positive point charge is 100 V. What is the absolute potential 4.0 m away frk5qtdhc.0edl, v cv.3om 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 eotw6;. vk4uz point charge is -100 V. What is tu tek4 ;zwov6.he absolute 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 3.0 V when1crm9:habej9noe.ud : .maf 1 a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when . mr ao: 99.u1n ahjde1efb:mceach 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 o9mqf g4s5b*tbqx, g6 /hnnai3f a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potentiab3hgg5i ,fxn*/tqns 69 4qbmal 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 twu b .jjus3v4yh 3jb)k)u+g2uao 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 is6( 3 7i2h,vxhdory- zmwljrp6 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 cho4 /g.vl3lu: *gde coapacitors are identical in every respect except that one has twice the plate area of the 4d ol gho.:/cv* ugel3other. 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 hasq / on1lb5z r-mjde;0l a capacitance of C. If the area of the plates is dou1olm d 0/ql-5 ;bjerznbled and 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 fully and then is removed. The pb:t.qq+ fn6c qlates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates.qqb qfn+c :t6 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 *v;p .j- zb 1-xf dhkzsup,lg*the plates of a given capacitor is weakened, the c-u.*;xdlz,k -jzh vps* 1gbfpapacitance of 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-d)sqhl l g7i )qba4/a8qzb 8b constant voltage by a battery s qq7a8bqib8lz alh4 -/ b)d)gas 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 m4g;gtax bb cp;h ;e2je0s cb35aintained with constant voltage by a battery as they are pulled apart. What happe2 beehac t;s 3g450b;jg; bxpcns to the strength of 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 for adding a dielectric tsg*9zxo1 / lgmaterial between the plates of a capacito/x zl tg9*og1sr.
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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 td-owh -kx5wn:3 8 h:kvr 7u e60hfcf*gkm-cgh he plates of a capacitor. Whaekm*cgcf :65hfuk-vnxw7ohh-0 8 gw r-:k 3dht 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 betwev;i q 4;yx*2d bju8ycsen the plates of a capacitor holding a fixed charge. What happens to the elecy2y*ud8 v4 ;iq sjbxc;tric 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 battery a (7u: .(1 u9/ta qxm7seb7qtojyzqg nrnd becomes fully charged. The capacitor is then disconnected, and the separation between the plates9 uqjx 7or q.n7s1/:mzygae(ut7t bq( 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 pu1kyjf w00r4 constant charge causes the energy storupw4y 01jfr0 ked 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 a1 kw5 om 9 9ulc kuzlhk7mk3ewh1/8(gg given capacitor causes the energy stored in that capaciw hk9h53 l1/8z7gkomcm gu1k 9lkw(uetor 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 Cmsbp q0 w:3w 4,p:tzzp of charge from point A to point B. What is the potential difference between points A pmw3: zt4zb,:pw0 sqpand 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 f,0ig6fijv iz2b/tt2z c2:j s from point A, where the potential is -50 V, to point B, wh0 zjfg22sc6f/ti: v2ij zibt,ere 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 potentialjd02nq:5 ou;mf71o pbx e0-um pr kly2 difference of kux q5:u0j ;odbo -nr 0l2m 7py1m2fep500 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 through an electratoerz18x/p0ek 6oxuvd s 2(;)cdc e:ic potential difference of 500 V. What is the speed of thkrcsua pdx6e02;o :dc ) (/oe 8zxv1tee 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 ng c+*djvg2. 2f ;rf;cp oxotdn n063hg52zw dpotential difference of 1200 V. What speed does it acqu g22d gdopfd6gcj 5n r;x 2.3+c0fwovn;nh*ztire?

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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 movinh (mtp8 ir4xr;g $8.5 \times 10^{18} \; electrons$?

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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 difference of 500qrixaqfc8* 1*v;, eo v V. What is the velocity of the electron afterwai aoq**1 evv;8fqc r,xrd?

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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 ok-60j f(qmp uyuh cv+8bject is accelerated from rest through a potential difference, and afterward the ball is moving at 2fh( q-80 +mvp juukc6y.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 tgzmg+. - ucau8gtpwe+d d;n 50he electrical potential difference between two parallel metal platesgm+a0d .tuu-e8zdgc+5 ;gn p w 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 1c5(daew twf5.fq7 s idirected parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potenw5ai7 1cdt. fsw qe5f(tial 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 toward th1gn/l etdz/ ewix(4zw //ry w.e east. If the vol wz i/dx/rln/1w .ze4eg(wyt/tage 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 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 fieldr enfqpb2 f1(5 of magnitude 3.0 V/m. rqp 5bnff21e( What is 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, arebn u*/dbd-mc9 connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arubd md-n9*/b crives 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, separated bf2 x 6zraqvi-ha4j,m1f -9biy y 0.20 m, are connected to a 12-V battery. An electron released fzj4ifh2bq fri- x-9va1 ,6ymarom 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 connected to a 12-V-pxr;ru scfje.lk:u/ mqqwn18 -w88m battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.05wfmpe wcru.-1s 8-lqnu r xk8;: m8j/q0 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 towarj /mnoeu)t;1b z8f(dh d 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 1.0 m directly ea/ 8n(;bh1utod f )mzejst 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. I02d wcnf: xxo:jjd;bhs *:x1 jf the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a poiwxfd hdj0: cbj12:*o;jn sxx:nt 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 onm((z) yn i)sqf 12 V, it will acquire a kinetic energy (in the absence of friction) ) ymi)snzqn(( 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 distaod vxa vya 5a6:j,+:jgnce 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 th8g ((c ierl1hue ends of a meter stick. Find the electrical potential for 1u(8h(i cglrethe 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 (9/ x8/tl12 y+mk yhqi*pg3 gjaxbh/gt0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken toly /gx91i /hkh m+8t/a3qbxt2yp*ggj 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)yz1h re 940co*; nlb0nvolf6l and a -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 cfly0eo;lnnbc 104ro*h zvl9 6 harge 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) + ad(6vqvt r ,e rm :;5dvpm -oxe1eszev(dl,9and 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 6q e z 5,t,rmoe v+re9;l av-v(p1mvexdds(d: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 ax0ksr c :3,gkzt the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.: sz3gk r0cx,k0 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 diagonalllj)c zi 34xkd qkd)(3t9ma io4y opposite corners. In the other two corners are placed cl za93 m43 kjt (i)oxickdqd)4harges 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 g+*;02hz2(a-syi ngsev7r5hgke vkm +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 : unydq62qv)fz70zggs/ ikk5 place three charges, each of 2.0 mC, at the corners of an equilateral triangq: k07gzu5y6v nis/gzkd)2 q fle 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 t.qh/ )4kicie go 10cig.q /e)4 kih0 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 y* kc5w r hdw bv6,k::(yld-kuhas 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 9iomwo+op )s;filled with air, and the plates are separated by 0.050 mm. If the capacitan)so9 im; wop+oce 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 platea my.9u9l+i2dd/m(mx ldrk 5*h krwx* s 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 of 5.0 cm. If the potential gs:2qh wh xy s3mw ,1td:qu/l*difference between the plates is 2000 V, with the top plate at the higher potenti1:d s/ 3hg,*hq:qytlux m2 wwsal, 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 batswkoz.,;,3. 3if)fjhwq vsx gtery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remained connectedfi,q3;fxvjz. 3k.,) og wss hw 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 en4b*,g l q s)6e;klgqzxergy is stored in the capabqx),q kslgg*z;6 l4e citor?

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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. Whs/:(0gv,og arfc :orvo(m7gi at is the energy stored in the capacog/(:s(io ,f vgcv0:goa7r m ritor?

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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 platzyf8vx )xls .r3tqi,) es of a capacitor when it is connected to a 12.0-V battery. How mucr, s8txzqx3. )) lifvyh 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 that it sto,y-hvb)kbc / flfko bh,f-1 8wres $2.0 \times 10^{-3} \; J$ 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 capacidi6x4my3,s *o j hzp*xtzz9q:tor 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 capz8zqy3 z5d /kcacitor 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 consists of plates of idb,19wzie9u 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 construcgs0z-ka 2b7pw ted 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 conlsagh,7-z 75 r3; bm,w,ckt( gxmw/ney. zkylstructed 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 a3h 3rq7(m ;fkztr, smt 50-V battery and becomes fully charged. The battery is removed and a slab of 3( zmmhstqf,;3k7rr tdielectric 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 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 bati gd xmru( h(ka,/97iwtery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space gw rah7 ux(i9,i(/ dmkbetween 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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