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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 novf, c7vdr ddi419b )omt 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 afevrl.jwh6xa z8 4ynp 4s.0; 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 insulated from their surug ( tryqf j/c4ly-1a/roundings. Object A has a net charge of ex/ 1qcg talr/4 (yf-yujcess electrons. 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 o 8/-rnjj pcc*r rup9o+x f6iw-f 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 inkgz 7 zwt5)5x,tckm* v 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 coea :kc/0,b tkjnducting 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 rf(w; k 7how0pxy6 ynx *3qm8asest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, 3yh6;koxn*y0aq 8p sfw (mxw7 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 po h-e1h.zn; ,p)4y sf vtsk;zhdints 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:y 4awg,o7w qod8fs *z equipotential surfacq wgz7ooy8 fs4a*:w ,de.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfaq; w68im.ila;pa pk1vce 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 carrying a charge equal to that on the elpmp1c9h ljwqkr .u7 0:;le dj poqd;(8ectron as a result of movipph;qd7wmkj.1; dq l (:8lc 9orje p0ung 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 cy;crq+:jvvh4 q5wq 0a unit 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 corresponds t1f-10ib gj wuwja ruq+)uw+u3 o

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential xo:tm q( z1:ns5l4nu bn*0gq7fd s3rjat a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.ufrj1m s:nto7 30nn5(qbl4dz* gs:x q 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 dis6 hs br()yipg9tance of 2.0 m from a negative point charge is -100 V. What ih p sb6)rgy(9is the 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 when a charge oh19a4 k rwrdg*2z-adwo e4, dhf +Q is located at one of the square's corners. What is the absolute potenti4 4w,w h-d9*krr2gh1adaeozd al 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 potentin. r0-5lu8g0iqdbkjz al at the 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 absoludr.0i n5 q u8l0kz-gbjte 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 1z7./lmh f +1vhnekhtare

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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 i7dw( xcef2u .xs 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 are identical in every resp2.kyd07zd-mus m(vg (r hvb /lect except that one has twice the plate area of the other. If(rmzh(7vd/l0g sdvu -bk2. ym 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 prl*.iu,-jgfu i6w pscrd0y:f ; +k h4capacitance of C. If the area of the plates is doubled and the distance between th4dhg*rpy s:iurf fw+uj,.kic ;0l 6-p e 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 removeds wa 09w1jmq/q. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the p qj9a/wsqmw0 1lates 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 plaxam*eam ) .l+h(ewr:6 pa2fpgtes of a given capacitor is weakened, the cap.fehpma*w2:)6arl( g apxme +acitance 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-plate1;;gf wdevyca y 2e6n9 capacitor are maintained with constant voltage by a battery as they are pulled apart. During tne; ;dy1fea6cg 9 y2vwhis 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 m-r w hsst5)e/vp(r5 fconstant voltage by a battery as they are pulled apart. What happens to t( 5-phr)/ fsve m5rwsthe 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 material between the plates ol5f,8q/ 5wzpj gvz1dvf a capacitoz qv,p8 z1g5fjvwl5/dr.
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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 capacitor tcvbgi jji-4dmoi2 y(;)i 6y4. What happens to tyiiv6tim(c)ijo 4-g 4j y;d2bhe 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 -)ysmvwep 27g. s /-brkhf;njplaced between the plates of a capacitor holding a fixed charge. What happens to the w7fy pb/vmh jsns-k g)r;2-.eelectric 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 and becomes fully charq2f47e) x+gs4sxqgk a5 b;iby1dcje* /, ifmo ged. The capacitor is then disconnec12 ,k a;fx*qsb y 5m4i id+jebfqxg7oes)g4/ cted, and the separation between the plates 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 c,by 6i3:riex xnr9to+auses the energy stored in that ca39yxrrxinei+, : b6 topacitor 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 fqpy2kf.-g.7j mlcf +given capacitor causes the energy stored in that capacitop mj7lf .k+fcqg-. fy2r 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 point B. Whatv+nwbqn6wshiy i9rk 3 n;wm+),uo -)a is the potential diffq +wmvoryw-sbin ,an9hu+)); n6 k3iwerence 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 jd+x6-od *gwoelectron from point A, where the potential is -50 V, to point B, where the potential ig*6+xj dowo-d s +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 elect5atd* yex4ad ;ric potential difference of 500 V. Wd5ta*4edyx ;a hat 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 electgrs 4 bkww:):i4vga1fric potential difference of 500 V. What is thbr :1 igsawg :v4f4kw)e 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 differef )jlhe21* mwrnce of 1200 V. What speed does it el ) f*jm1rw2hacquire?

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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 dox70iy occbd9 a/9abn ) 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 difference of 50 xny6mp55ahbl- n)k ;l xhf8w52p ,hfp0 V. What is the velocity of the )5ph 2-p;b,lx8fpm65 h lx nhk wyfn5aelectron 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 otnrcq83 b ot)k0v9e+xo( dkc8f 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 the potentialdo cbt8r+e 8ctxno() qkk9v3 0 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 elect e3 e)1ez 2a x0t-wzs;te6r2vyqiu(j hrical potential difference between two parallel metal plate 20a3(uws;xt)yze-i62vj h er1ze qt es 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 fiel p8 p: ;fplib gz ts+-40mvi3jsmu7tu8d, with a magnitude of 500 V/m, is directed parallel to the +x axis. If the : pz i8jm t-gf4p38 mbsps7;0v+ultiupotential 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/Cd p xo5w9t,,fz 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 directly west of that pxf ,zwdpo 5t,9oint?

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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 th 3mruwaw:. wzr1zj b6hg 1(7woe direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic en1b ra 6: uw 3m1oghrw7.wzj(zwergy 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 connecte r( gblm/c9(hhd to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the elecmhghlc 9(b/r( tron 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, separated by 0.20 m, are connected to a 12-V battexxj qge0gd.p2*v;b md9oce 6)ry. An electron released from rest at a locationq0 dgcxb9;*e m6egjop2.xd )v 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 batterad:i3at)m8tp *d /vw ey. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives ai8dtw3*emad/)a:p t v t 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 dai7yh- 5gy 9swirected toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltahg yw5is a9y7-ge 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 the east. wz7b04g *t)yjs 8xt uyguc4l2 If the voltage measured relative to grounds7tjc4b glu82tw4)* u 0zxyyg 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 a potential differ(xniwc i+noe qzey)ij-6 ,p (3ence of 12 V, it will acquire a kinetic en ijee(c q,i wz+ )np(y6-xin3oergy (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 :tqu he-z+3 xeat a distance 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 meteruathq 0d9s 72uj8 akrsx +7m1g*:gmaf stick. Find the electrical potential for them d agu1kamj2+*xt0:f7q 7a8grs9us h 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) a-o ug( iyi(bed:)yn7jnd 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 at gb-i7i je)y: nou(y( dpoint (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,;gst3 se gm75x 0) 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 at 5gssg;3ex 7m 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/f2r a/+rnc paidis-2ismw8 8 -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero i dw2/i+r/ipa2sac 8fnrm s 8-at infinity, what 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 p l 8im18 y.fm7fl6zixthe corners of a rectangle of sides a and b. Wi8786 flfyz1mi.lmp xhat is the potential at 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 di6te8 wo..v+vvunk:elaz,zqa-o 5ld 8 agonally 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 square's c w:qvl.okva5z n -z8ev8uea ot,l+.6 denter?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An alpha particle (char42umfywi*1 rt ge +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 place2gd ,f-bp5zmpf*/mbx(b; kc * zdv 0ym three charges, each of 2.0 mC, at the corners of an f(2y b zmxdbf;m pbkc,v-md/0g5*p*z 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 yn-gf-0 j,t us)0vakx100 gvx)yf-stn, - 0uk0 jaV?

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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 oo r+4a*gcg 9lqf 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 tht)h(plz6y/p .imt n :xak(-c(,srzxre plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is thec,(pan sktxlr-xzp/) mi.6h(z yt: (r 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 arefzrv5bioxa,* q7 m3. z0agy1qfht-r0a $0.20 \; m^{2}$ 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 capacit:b*qtd 35;6k wsotl6bg)8edyxh9xr s1 x)hyf or has a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, wi 8et3 1s* x hwy9dxt s;byl5ogbfkq)6h:d6x)rth 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 acroh04 8)fc5brbtsv+ 94ikt q nygss a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). H5fkbb 94 rnsytth04q8i)g+cvow 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 capdv wmq9bn *.2bacitor. How much energy is stored in thev. bdb wq2*9mn 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 enwa1 r(nmkc6eg m0 c(,qergy stored in the capac((r 1mkace n,qmcw0g 6itor?

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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 m slu1l-3ge3iy(r tejo-6g( uonto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this cs (euely1 r-3mlu(joi6-3g tgapacitor?

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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 ith92 vr.gp1qggq )my4g 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 area jj -w0s+)v+h fk )vyc):ylxed$1.5 \times 10^{-4} \; m^{2}$ 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 capa ,- + 6 e z+xoqyj,zyfdn,a/5xbajrx2scitor 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 con.2 35efvpkrkhq ym-i ad -pu(+sists 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 pxjyl. ohrs4r(v a.tj77r8e5 e / un8gklate 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 plat ;p3:0yjkrh wle 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 and becomes fully charged. iko18cs9/ hcyn6//yjt gkn 0h; *gb rl The battery is removed and a slab of dielectric that completely fills the space betweeih1k9k0ghn///6jotc;yl y r8s b*cngn 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 anj 3y+-; x9g( jua2 xozw yr n:4u,smxq6vuhnc3d 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 across the capacitor's plates after the svx x-c,g(nsar x3u j:z32wy4om6 nq9h;+uyj ulab is inserted?

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