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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 bbgn,b .vm 9jitdi,57 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 isdl c1j18v7v5 jyhga g. 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 fffo:j.wka5 ;surroundings. Object A has a net charge of excess electrons. Object B is grounded. Whi wfk.fo5jf :a;ch 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 dirn q+5c v8uudptum . n-4sds,6wection 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 oppositeunzs,+oi77hjlikji5 1 ht5 .h 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 condy m-)zk5 lf k3u dagqyc/)4hq.ucting 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 a speed v by a 5 jzc)k+xoun h14h *+yi00 V potential difference. If the potential difference is changed to 2000 V, whyn4+h huzk)x o i1c*+jat 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 potentij hunet2qpm9xdo 0+k+ .os /9gjqfy+ *al 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 movelu/1;zpdzqk 8u5x6l zd from point A to point B along an equipotential surface.x k z/u8z;ql1 dlpu56z

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfacea 6b:/ji dsvs4 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 eque6og4ns pyi-s/1 thfh-x1n)2 ng3eh n al to that on the electron as a result of moving through a potential difference of one volt is referredn4sx -3in)p h sgeg1toe62h/nh-1 nyf 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 x2b/xranmv ;+2 oir *axjop9jtiq1: 6 a 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 corb feli rkv i;2f(5v9k0responds 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 ut5juxa+yi1ogmbbc v7 391*i a positive point charge is 100 V. What is the absoluteyc 9b5gi+ati vuo 7*m11 jx3ub potential 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 potentiaxd:fn,4 1e1aq l2wi 82cwtlitl at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point chargwta:ilt1x8c21 q, en id2w4lfe?

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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 oj*u(yajxg3h6cn*o :gl9 zv1 nf 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 chaxno*(nj9ag3y6hgcvu: 1 z j*lrge 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 is 3mtu r m5bz.8vmm-zf52.0 V when a charge of +Q is located at one of the square'sm r-mmfuvz.8m 25 5tbz 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 (r yqxln.41kg 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 i pkfhhfqcv6o8 qk 1cy6m07/+js 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 respect exeb5kfe9q 1tj( cept that one has twice the plate area of the other. If the smaller capacitor has capacq1j(9tf 5e bkeitance 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 of the plat 7gvmw*hh6 eh4es is doubled and the distance between the plates is halv7hvwm *4eg6 hhed, 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 pa*z )tzpmaz2*/1t zgj jrallel-plate capacitor fully and then is removed. The plates m/pgjtza*tz jz2z*)1 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 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 betw 0* )we)itlkgreen the plates of a given capacitor is weakened, the capacitance *g) e)r kl0iwtof 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 wio(kt3 wf3k+n-oz/rrbjov) t- th constant voltage by a battery as they are pul/btrj3 tf ok nr )(o-+wo-3kzvled 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 maw*vrlg1a m(5axmv q7 ;.z -cldintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this pro(wv 7m ava-1*.c ;zm5dqlxl rgcess?

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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 z9xvwu4b 0ds) dielectric material between the plates of a capacit0bvw)sz9 x du4or.
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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 pai;sf(s e4z. lm,ym4;vbs g2pxper is placed between the plates of a capacitor. What happens to the capacitancxgbi;m4m2 s(f ; s4yvp,lz.e se?

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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 the plates of a capacitor)ebq9zb .mo( a holding z(ae .)m9bq boa fixed charge. What happens 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 a battery and becomes fully chargza-6:om g rcw -bu-s 7p-v7ztsed. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The-g :m6-wc tpruz- 7 bso-zas7v 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 causesjxe,x*25 pe2 e:no lxc the energy stored in tha5e n2ojlpe excx2 :,x*t 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 amv j/.npr+ zn9 given capacitor causes the energy stored in that capacitor trm n9z.npv/ j+o

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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 chw4k7 :dx 3a dr4g1icqtarge from point A to point B. What is the po1 d:ag4cixt4 q7 3wdrktential 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 mo q9v/r+y o 2shcd/+gpnving an electron from point A, where the potential is -50 V, to point B c2qhn/ o+9sr+/vd gyp, 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 vti jo08j-6e4ecqbw8accelerated through an electric potential difference of 500 V. What is the kinetic energy0w8ec q ji-b8e46to vj 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 th9g9zke x/: ohgrough an electric potential difference of 500g/h9 o9:kzxeg V. What is 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 fa0zvq-mxm6 u :flls through a potential difference of 1200 V. What speed does i0m -mvf6 uqx:zt 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 V do in movin gjxbq v9(8qt*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 *f 2u jd.-wmjuaccelerated through a potential difference of 500 V. What is the velocity of the electron aftjdf ujw*-.m u2erward?

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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 charg,.k;idmm qt :d20zvyxtln4cff7 6a+ge of 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 mt;x:zfq.imfc,6v kt4+dg n 7 lmd 2ya0agnitude 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 difference between two par-vp 3)fy/e zksallel metal plates separated b3pk/)fz y -sevy 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 ma t7up0m 6-+81,c;t dhzi: zustwcjy vh2wlg +mgnitude of 500 V/m, is directed parallel to the +x cv0+h , -+;zjhtz 27m:ytlw8tw u1sdcu6gmipaxis. 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 directed t5bx6;x vlpx 8 e,y46 qzcyrc0howard the east. If the voltage measured relative to ground at a gi c4,rbx vhl6 ;z epc56qxyy0x8ven 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 o c3v.ba 4y2pem7ejj:d6 b: 0rzh5qz gif magnitude 3.0 V/m. What is the change in kinetic en 7mec43rdb:bz h0yag zj5v2:e.ip 6qjergy 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 01l sgrx:yu6jnk:e 0 0f.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plateeg0sf rkjx1uy0:ln: 6 . 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, ief (jc49ct1/ zi/aev separated by 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 0.050 m from the positive plate, how much kinetic energy does the electron gain/ eajizvcc (9f1et4i/ ?

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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 battery. An riyz(uu75h 7s/z) x fy(0j/a eaacbts0v3o.ielectron 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 electro.yavt zcz y3 o rxa7 he//s5 7ba)u(i0(ui0sjfn?

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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 Ncw-a 7z4 6cofh/C directed toward the east. If the voltage measured relative to ground at a givcw647 aozfc h-en 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 the east. I)(u)s8g q4ulib flw7hf the voltage measured relative to ground at a given point in the fiesl7q gf iwb)uluh(8)4ld 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 wil me;uqea0l,t 9l acquire a kinetic energy (in the,a;qet ue09l m 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 distance of 2 wcmutkkdy,k hbl,q;+36fe; $5.0 \times 10^{-10} \; m$ 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 thep u fos,6c(cy2 ends of a meter stick. Find the electrical potential for the center of tpu o2fc(s,6 yche 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 (3.04csab*v2ku/jo 3v* -auix/ gp m, 0). If the potential is taken to be zero v2 * 3/s/ujao4x kcgubap-v*i 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) and a -2.0-nC charge is a0x 5 /txbclf3et (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potentialx0bt/ c53f lex 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 cha8,c8;cj d in;*zou wsz/pbqx-rge is at (3.0 m, 0). If the potential is taken to be zero at infiniu;o;jc8 c* b8zd i-zxq,nw/s pty, 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 the corneql,zx-o+.snu *t r8eqo6q)rh rs of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = u)h+qrq8ton,-o*z.q lex s r6 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 di q 4*rrqfifu.yi ,qw)ty5 0p3aj -ow+cagonally opposite corners. In the othy utrw3oij )qcaf *y+04ip,.r-qw5fqer two corners are placed charges 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 +7j d*-tvceey5 osowwj1s2 (g92e, 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 thrpb imj8fc ,*.0aii2 dxee charges, each of 2.0 mC, at the corners of an equi b80dxp iim*a.,ci2jflateral 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 cape* ,a4hvuup(y acitor when it is charged to 100 Vy 4*vuahu ,p(e?

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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+) k . )gkoq 0p)(bryv*.phxuuddw0xz 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 wit7bnk mrt1,0q0vwr2 h lh air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is10,r mvbq7 0 lnrk2htw 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 capacitl m73t2yl m lh,(0htwwor 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 of 5.0 cm. If vw :*xho(vc c,the potential difference between the plates is 2000 V, with v v,(woch:*cxthe 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 ciqag d5 rll0lzl)eg7, zr3,ze uy3,j- onnected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge,rz 0- u3), leq37,5arlgegzl jyidzl 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 storet)xyi- ixzn *+s8n3 grd in the capacitor 8gii nznx-srtxy3*)+?

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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 ozx646k fmy( hmF capacitor. What is the energy stored in the capacitor?(ymzf4k 6h6ox

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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 when()m98 idpm3tgxnztb2n(i ayru f-z( 5 it is connected to a 12.0-V battery5(idm(yg3 a8 m(tf tu-nr)n9zxpzbi2. How 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 that it k7.rzy fj/f4vvx*od: 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 platngi1i9q wic21es 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 of 6qzp bhb8io-7 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 p.wuq8si n m x)kiq;k,-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 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 platet+jpu/ 8jh;6 ,ay6xuvoj-w.z 4 ayas y 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 awa/ /q:rbnh9trea 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 bgd2 -ml0o4amk5eckf fr,3( o lattery 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,(o2 40 klr-cfomge dml35akf 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 batteoett/2(r9u,- y pfr wzry and becomes fully charged. The battery is rem,(yufzt 2rewo9/p tr-oved 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 slab is inserted?

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