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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 followinzh qj6n2cvkep+1a:kbn) x9 s- 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.5 qy:hqe/nw rdp(k; w 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 objefn 7,khrup(1d cts are insulated from their surroundings. Object A has a net charge of excess electrons. Objed rp 7uh(,f1nkct 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 thefr 1 )s7ekg2l io(*3lwlsikl* direction 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 sen20+05 w zre2ho ii95zpxdm 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 jtvna1)hx9*1gu) k shconducting 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 500 V n)1-p2 fnoc 6n6cwhhz potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ballfn -2hz6cc6nw1n o p)h 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 avy9) bifg4o0zkhj ,0rt 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 poin/(hc 2albsfc.t B along an equipotential surface.c 2hsa /(fclb.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface v :w-*to;wu(indv 4)j s/l df/;nskdrmust 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 particffqh+ x6eyd8+ -m f5jj+3hblble carrying a charge equal to that on the electron as a result of movibe fj6 yf q+3f8h+mb-xhldj+5ng 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+ yganwx3rp) ; 6zu)xd 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 corre0*v/g( vqp:)e dxizj1cyv8g hsponds 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;mug 3+/nxp lz from a positive point charge is 100 V. What is the absolutxg+/;ul3pmnz e 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 potential at a distance of 2.0 m from a nx.*c xaf)hai1 egative point charge is -100 f*x. a)1hc ixaV. What is 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 3.0z(uq+0mlp mmx w07p/ e 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 ch7ewmq+ m pzlu/0xp (0marge 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 3.0 V when a charge of +Q 36nz +ufp9 h ak-iuv:ceo 2m8qis located at one of the square's corners. What is the absolute potential at the square's center w:8uoa3n+ iv p u6-kcmzhqef 29hen 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 consistv0b(gku )v-jf of two 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 issw,1 wbgmrn , j.gnj,. 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 except that one hc2ysj 8-k0cytggiz 97 ohnta)4/ ug7has twice the plate area of the other. If the smaller capacitor has capacitance Cy0 jg)-zui hyg7 cshao94cgk t28n 7/t, 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 fj/sl 3 -cybb/ah: hz*hqu *c.5gvop(. If the area of the plates is doubled and the distance between the plates is halved, what isqbz h/lp-ya.fu*ho (c:jb*5s gcv3h/ 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. T ud.qga (j ujz8rwa4.fe2 ji34y* :rcphe plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) Whd3 riw*u4.4( feayj jq .j8urzgacp 2:at 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 berkb zd8i,3(guy lu94 qtween the plates of a given capacitor is weakened, the capagr8yk uudl9biz( q34,citance 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 maintaiwg k0vrq it oehodu1(p5f4/ :(ned with constant voltage by a battery as they are pulled apart. During this profkh0:pq1 (i4wro/ e u(g5ovd tcess, 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 maintain6zvc u3kzrh 3,w9* vcked with constant voltage by wv3kucz63,h9cr*kvz a battery as they are pulled apart. What happens 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 dievx+awk k0k v,ap y+woyx+nyr pkal /q5;22*4slectric material between the plates of a capl2k4,yn 5yk+wv*pyxkvax s+a/wqpkao + r02; acitor.
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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 isqb;gzj20- yv:;n lox k placed between the plates of a capacitor. What happens tok2j0;:zyol;- gv nxbq 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 suk+oa-jmme4z30xsw h9 ch as paper is placed between the plates of a capacitor holding a fixed charge. Whj4aw 9 ke- o0xz+3hmmsat 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 full, 7dhnm8djc n7bt+u +ey charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge +h8e j+ d,nbnc dt77umleaks 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 const8hbt/ or d hb-1txi:9gant charge causes the eneribo-gtd xrh9b: h8/ t1gy stored 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 causesim *no9fc6 8 /whdyxc. the energy stored in that capacfcm dc .9/yix h6*ow8nitor 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 poiv50q lusiqi9/ nt A to point B. What is the potential difference between points A and5 iqusvl i9q/0 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 schpb5rsay23 4x(yb 4 A, where the potential is -50 V, to po24 bpsysa35hyx4r(bc int B, 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 diffe*dt vfi66;bq/ocpnca 0.gd1xrence of 500 V. What is the kinetic energf 6ca n*gc o;x0d/ tdibqv.p16y 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, isxlko5m 2-g1 i+xx-hl w accelerated through an electric potential difference of 500 V. What is th ik1xog lx+lh-2w- x5me 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 throu uggl/:uqt 6*ngh a potential difference of 1200 V. What speed does:ung t6 l/uq*g 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)j )z- e+spi;69 zu hb3imghpl.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 throu3jjhub r ,ue;8dg-3x/ r.8 my zo2zxowgh a potential difference of 500 V. What is the velocity of the el jrz 2.;o3 -8mx,dwruh3xe/uojz8yg bectron 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.ocvgmzs.f1 snso r i0e((.f ;: The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s os ffer.zg1((:0svn ;os.i cm. 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 the elecz2g5:h. zuln mtrical potential difference between two parallel metal plates separated by 1.0 mm. What igz5z uml2nh .:s 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, withcoqn7m(6lm9c tdqa npb -5k88 a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is t 8mpd(976c-alqq8 n5bocnm tkhe 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 toward the eas 4zi 1u6jv(ehf8t:vj ss h0+cgt. If the voltage measureshfs u:(hz1c+jg6it e v 80v4jd 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 e( mi(.hfhshh u o5),8j uur8aan electric field of magnitude 3.0 V/m. What is .uu5h)omfhr(,s iu 8he 8a(hj 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, zcatl,t- +eow,o2ao :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 1.50 m from the positive plate, what is the potential difference between c-ta :wolz,+,2ea oot 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 0.2ik4jxze9z3 z )0 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. W9j xz ek3z)i4zhen 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:a1ln dhcx p91 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, what is pd:n1 lc1ha x9the 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 the east. oa7s 0 r95bzyr If the voltage9azy7 5b0srro 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 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/g(9ebbn:/i, c f+y qkwC directed toward the east. If the voltage measured relative q,in cy9b:bge f(w+/k 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 a potential difference of 12 t2)p.t ebf( tcbt:7ug V, it will acquire a kinetipb(f.bt c g e7tt)u2:tc energy (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 at a distance offo9enk4d 0go* $5.0 \times 10^{-10} \; m$ 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.sh0pj:sv6so 2b6p;g: iti-v i Find the electrical potential for thb h s ;jv-6pi0ss t2o::iivpg6e 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) anxxxsqt 9f8 zyc4.e, ,ad a -2.0-nC charge is at (3.0 m, 0). If the potential is tak ca.tq 8xzxyf4 xs,,9een to 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) and a -2.0-nC charge is at (3.0 ;2mi e3icjx t(m, 0). If the potential is taken to be zero at infinity, what is the elec je(it;i 2m3cxtric 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) an t5ooo)vvt r*.c5zd s7d 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 to point (0, 4.0 m)ot5.sdv* zor7 5cvto)?

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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 xcmr2 c4ol o6,+q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectan 24x,6 olcocrmgle 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 s0 oyfvi(o;5mt 7i6 .wndaitb,ide. 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. Whai ya0;(5i6t,nito vob.7 w fdmt 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 +2e, m.mljtm(axbz.p6 0 cx 6ass $6.64 \times 10^{-27} \; kg$) 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 vu1au- +s41kxgwu/mw iqvp1 2of 2.0 mC, at the corners of an equilateral auv xuiv4 ws21/mup+q g-1w1ktriangle 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 2qofl 3 t(m h,yqy880vf.0-mF capacitor when it is charged to 1000ffhtyom y388ql(vq , 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 has vu3tw* lx )hl8etei x9 v+hwa-vyf*11plates 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 fifg3/ 7ox0tvsad00 4j qpgct;hlled with air, and the plates are separated by 0.00/t a;0fs3tvdog7gjcqp4 x h 050 mm. If 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 plm 0b l394tobtau5)j pcates 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 kxh*-rojpu, 6 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the hip -kj,xorhu6 *gher 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 v*d 3ju ,c(zkaw tc6e:is connected 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 flows from the battery, which remained connected during the prwz3,j 6(eck*a vuc d:tocess?

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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 plaoj:*k,6bzhz b- j5y w+9yuwd zced on a 15 mF capacitor. How much energy is stored in the h*kz b:59y+u-w6z o ,zydjj wbcapacitor?

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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 thn l rda3ga-62(yrt7 s.iu vht.e capacitd2tn 7(ra.ya.tg6v3lushri- or?

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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 cap ozc )g:sk:no1l 1l/uzacitor when it is connected to a 12.0-V battery. How much work was done in charging this capag1s)cu/ lnl1z:o kz:ocitor?

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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 storj9grs/tk dbtt)/cga (8 r,k -zes $2.0 \times 10^{-3} \; J$ 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 coni pv8 lpuw3r xl26)(dcsists 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 capacitor consists of plates of 0jw-xvs7p5dw al yw2 /b 8k;vxarea $1.5 \times 10^{-4} \; m^{2}$ 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 conspk4q8ft8 d yn*k4/ x za.ie2rx8yh.tq ists 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 plate area.w*5 h yw nzo1uprex+3 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 capacitoyzc;l9ek(s h :r is constructed 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 isat *x(r);kc*j2hrv li connected to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the spakaxh2l)rti(rc*;*v j ce 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 z6 3zgx5)j,grk05lgbv b ge 3gbattery and becomes fully charged. The battery is removed and a slab55 6eggvbz)3gjgl xb,r z3gk0 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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