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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 not a vectqao3dw vc48rejoa+ ;0 (eztj l,j, 2tdwa -,gzor?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulom h0wzry w4;rd 15d:bgub 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 objects are insulated from their surroundings. Object pz u8dya8m hcr q;9.w7A has a net charge of excess electrons. Objeau;hr97z cy.qdmpw88ct 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 of the electric fielf5 gtgzo*dty ,er1.7 dh6y2qyd

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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 electric 1pid(2v lq iae-q. atljb(x1.f; 9qf ifield

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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 ho 0dqt+3 6 9mgq0czeufdllow 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 accelerated 3i4vr )yfl;kk0uqze )from rest to a speed v by a 500 V potential difference. If the potential rl))ui v0 q4 3;fkekzydifference is changed 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 po)s)a *q tv21 t xu8pbkv uu-t 6ey0lbkiig3.i/ints 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 equipotenuaehtspbr 2t5, .y2nnefp 6-3 tial surface,pen ha2ts .62tybpu35-rfen.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfamn2 hpkw f*ae(.0 ;una;jfb 7zce 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 2i5pn2taz0ao carrying a charge equal to that on the electron as a restipaoaz 5022n ult of moving 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 unitu7yja*bu/a l g) haseig -)d:/ 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 correspbv*ky6 *(y3pyt nr aq w43ngu xe4k89gonds 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 c;mfe+z)a:z- o w1 mhn ;a/0efbo2 znazharge is 100 V. What is the absolute potential 4za- f:mz;n ena0a f;z/)2 hzbo+woem1.0 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 dibdr3:+wsa,q) z dtgu+stance of 2.0 m from a negative point charge is -100 V. What is the absolute potential +aqg,szd3w+ tb u)r :d4.0 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 3jg5jvdgx7n *9 l.g ci:n dk62s.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 g56s.gnv c dj2 xlj7n :*9ikgdother 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 of a square is 3.0 V when a charge of +Q is,w7f fft:sh0-l-b bws located at one of the square's corners. What is the absolute poh -sf0 7b:sfflb, -wwttential 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 thz9qbb cly*u u:,- bog8at 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 is p.jst0.cr2wf 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 excss:c b l40ay2nwv .2sfept that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the lasvnb:syl 42w 2sac.f 0rger 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)n( (zez uqw5f C. If the area of the plates is doublenu(e )z fwq5(zd 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 **ei2v.* ts/9qgedqj m zjk.cfully and then is removed. The plates are immediately pulled apart. (With e/s*t9eiqj kq v *d .g*m.jc2zthe 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 between the plates85 a5of1, zfjtj1ikyfmvm.,s of a given capacitor is weakened, the c j s,mf,ati8fym1.fzkj v155oapacitance 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 9 wc u-;cgz:-lh dpge9aljuy43 ht1,tmaintained with constant voltage by a batte 91w--dla3utc ,h;g4 zlpu9ecjg: tyhry as 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 areyk9sgwg9s 4 r7 maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the el s7g9 sg9w4kyrectric 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 thv82o0k/ye dlze plates of a capac20d8vz e/kyolitor.
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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 pv.g )hd, ej002ece xiiaper is placed between the plates of a capacitor. Whate .)x2 hv0ii,0edec jg 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 between the plates of4to(muwu 7 1lvkpr 0 zcos0w-1 a capacitor holding a fixed1oltu c74(0 uw1ozm- rp v0wks 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 fully16kt7demv7zm charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored in this capacitor1kd7e zmt7v6 m 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 a9a) (jf(qseh v constant charge causes the energy stored in that capac f(vsaj) hqe9(itor 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 ca q, /gb6l;/ta4vnja9j6s. egbtakbkf5) gn9g uses the energy stored in that capacbgn6bjeqsk5tg tj abvglk a/ 9 f6, ;g9na.4/)itor 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 pnw dxbkhg( c, 23gdb3, has1e1oint A to point B. What is the potential difference between points A an 1s,ag2e,1nhb(c dwhgdxbk33 d 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 bty*tyd;0,u shu(-u 8x zu1h(o ofif6from point A, where the potential is -50 V, to point B, where the potenti-*;b(ht1 (,6uuy d t syxfiozh8ouf0u al 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 electrs*iee 3mrt41)qrlpj+qnb 7l*ic potential difference of 500 V. What is the krm q)*s +34lete7l 1*pnr qjbiinetic 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 af8s p esip*y1y(awd0 /ccelerated through an electric potential difference ofi0( ydesys8a *w1fp/ p 500 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 falls through a potential difference of 1200 V. vj2ze uv7r1h. What speed does e71zhv. ju2vrit 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 Vp7rcz,6(*zim2 tl0sq nxzcl s si);6g 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 a potential difference bw86z2lfb( f (ot o:f(sphtr8of 500 V. What is the velocity of(fbp z(tw:2 r8 bfths (ool6f8 the electron 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 chargefpfg,:madrt unpjw 5.6m; 0a/ of 20 mC. The object is accelerated from rest through a potential difference, andmw,pagpn0:mujrf6 t5.a/f ;d afterward the ball is moving at 2.0 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 t4 t*mg9m*0lmc fr ncka9 o+2klhe electrical potential difference between two parallel metal plates kl* frk4m n20c*9 og +tacm9mlseparated 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, wiv wdvki h;(g3xuz+1hb8e5h 0a th 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 the potential at x = 2.08zhid1hv;wev+ 3 5ugkx(ha0b 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 e08tt lx sim0tr2zs+w:ast. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at 02 xw :t stilsmzt08r+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 dire9,a isgpept05ction of an electric field of magnitude 3.0 V/m. What ise09 ,app5igt s 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, are connecwu j of /oc:p.scga-71 xazx6-ted to a 12-V battery. An electron released from.fj6p1/7 x w-oocas gzac:x-u 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 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, sepagl:gst/ 1: :c m2zc/stemb*hurated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.:ucz:bcse:1mht/m ls* tgg/ 210 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 battery. Anz t3l8(e 98xx7bocp0cc nz x4j electron released from rest at a location 0.10 m from the negative plate. When the electron zl93n c0(xox8betz 8xjc p47carrives 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 electf g5vq stp*f(+az0/ o :wj(oy7zfp,rqric field of 50 N/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 1.0 m direc :gqos,((7q fy+o5f p 0vrzpt*j /fwaztly 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 dim hu:g9utbpy g19mw. 1rected toward the east. If the voltage measured relative to ground at a given point in the field is :1u9 tw1bmhy.g9 pumg 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 fv-(y3vvkn/ 6osfw4ircuc 8-potential difference of 12 V, it will acquire a kinetic energy (in the absence of fr- sfrcou86vwkv n4v3cif- /y( iction) 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 dis4ev2hm-3g+zx ojbx7i tance 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. Finzwd(7ij1 bth cd l(5)roa6i1g d the electrical potential for the center of the mb)gzdtcoirwldj( ( i7 h516 1aeter 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-qheca)s 2e-9o95 atpao:l eg.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential q s9laeto)2-poa5gcae9h e- :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 -lza) iykd0r(07u)-z5:kyuj cb -fw yk2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric :70ir5cwyu )z -d 0-bu() jl yzkkkayfpotential 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 charge is at (3p3 bwb81c gz1v.0 m, 0). If the potential is taken to1b3c gw b8vp1z be zero 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 the cor(uyo n f1qwwrf+t1-9oners of a rectangle of sides a and b. What is the potential at thqfryon1u 9ot -w w(1+fe 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 diagonally ofo(1(dt/a op1t6w65gdb- muj25wtb2y kaqff pposite corners. In the other two corners are placed cha/ (dwbg1t t(doj6qfumpy a f ok1a6b52-w5ft2rges 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 (chaar)69r xj,y ksy5xh )brge +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 charges, each of 2.0 mC, aa(0bv os x5auz ,uv4;ut the corners of an equilateral triangle of side 2.0 cmu z5vba (x ,oa;sv4u0u?

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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 + qw .dw6t:rrdj3x0hy charged to 100jt.hyd6 w: 0w3xr+rqd 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 capacito1sv; 1j trgf3eq.kj,e r 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 with air, and the plates are separated by w( e3l*nuo(yc0.050 mm. If the capacitance is 17*o(3 en w(cylu.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 6x8+, jyux8 brnf,wma 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.er) ;ar c)tpfz*kkve68) qgnge .t *i30 cm. If the potential difgnk )3kep t*6))egc v*8ze ri;r ftaq.ference between the plates is 2000 V, with 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 cok f,*xjy12 xt3yb ijuzg0: c4cnnected 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 batte4y 0jx*xiu cbc:yf23g,kj z1try, 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 xo4 v+r6n mxpoe scli8e51 y)5capacitor. How much energy is stored in the ca1 5scy)mx6nx ev+p o85 4oleripacitor?

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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 acros-c+x+caz- ,k9zyvq j is a 15 mF capacitor. What is the energy stored in the capacitoc -xk,-az qzjyv 9c++ir?

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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 capacit1*e2-ybwffa4+f obyhm ky+6i)abh ) tor when it is connected to a 12.0-V battery. How much work was done in charging this cab)e b+fkw*fy-m 1 yyi4t)6ba+oahf2h pacitor?

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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 storeslhl f0crq 7,9k-cqoy6 $2.0 \times 10^{-3} \; J$ 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 punr5in6 6wr;cmg7q 6r,b mqz(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 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 consist qmfg/s4 9ycqg ow(bzgpa w/-mk;a0 *9s 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 consiskoqx9c j-:t x l wp.1,af*1dtmts 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 const m86 ew+ku ayei 22nl)rmmb)7fructed 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 codezyr1,vs)jpljqytd ;b670r 05wo -lnstructed 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 a 50-V tb/s nlt+oo1c+pcigyy 518z- 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 i 8t/b+ c g-1io5yt syc+nz1plos 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-V156jrq eeige x 18p;tu,x8qjb 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,q8 tq1 ; uexbrp685g j,e1xjei what is the voltage across the capacitor's plates after the slab is inserted?

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