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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: 游客未登录  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 he9* vg2 ;,ui wtyml09 q0ahjrnot 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 vh oi5mx2e-8q m9 vh)zd (cix/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 su9l, ujgwq/r 9mrroundings. Object A has a net charge of excess electrons. Object u9m,wg9rljq/ 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 s r.fqy3rq n8/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 to the electemjcd(w*-u .v d,(ddkric 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 conductiwdh,7v kd s0t*j7b,e,evv u* tng 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 speedvybx-t5vga8l mtl*e ti95t8 . v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the nbi9 lvt8lgm .et*y8a-ttv x55ew 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 pq64 1cjd n6qv .wzvha sv/is23oints 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 al; lp o,rlaczlr9,f10gong an equipotential surface.fc,lo9zr10l ,;ra gpl

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface m4 jj6rg*yx8.r0mr*5:,o.y gdlvy1kdlt fwbhust 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 (*jrb suj8a;o carrying a charge equal to that on the electroja8; o(*rbj usn as a result 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 unit 2duby .f3vq4d r 6zbo2of

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspondsj;saltyh( dw+ mmc:uz*xbe:.s*44 k6oh( ezf 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 +h q;e,,m vwsl8q)r7jgf 5:ljzb eig5from a positive point charge is 100 V. What is the absolut7r5q ghlg:5qm;,s ,8)wzfvj l+ iejeb 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 j/0;vdprb d f07schro1:1;-nkanmxv from a negative point charge is -100 V. What is the absolute potential 4.0 m away from th da dx0 vn 7k:n0p1cfjhm;bs1r o-/vr;e 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 b7-mts8ecd -cat the exact 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 absolute potential -bstc mde c78-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 potential at the center of a square is 3.0 V when a charge o4um pa, +-o1k7i.pgdi+ t/bhac/lmlrf +Q is located at one of the /db ucoh/-4i 7p+ i al t+l,1ar.gkpmmsquare's 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 tweao.dgy/37 mmo 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 is5)e-oul eh3glrj3m5 kff + 3sf 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 ika nf 34m as-us)gi9w,dentical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one hasmgf s-a9,4ni awk)us 3 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. Ifjw-wns -ej12 e the area of the plates is dw-ns jwee12- joubled 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 calbjp/iz5+ht.q0 5 i ln2noi7cpacitor fully and then is removed. The plates 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 sepajnot.i07ph+b5 z5/ l2 qnili crated?

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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 plates of a givenbx,obq*kqxg:4p 0 . og capacitor is weakened, the cap,0k4gpxx.: qbq *ogbo 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-plate capacitor are maintained with constant voltw - -2wqxzp4+uw u4yl rbjx2+sage by a battery a4yuwxwps 2-2 4-rujbz q +wx+ls 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 maintained withi5( c5n cap4pl constant voltage by a battery as they are pulled apart. What h5i( na5c lpcp4appens 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 dielectrici,tu9e/a 7rag material between the plates of a capacitor i9/7gae arut,.
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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 betwena:my4 w:o+deen the plates of a capacitor. What h:ae:4 y+w ondmappens 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 of a capaci 4zeivodt;.-s tor holding a fixeves4;d t-.oz id 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 battek, luly gb9 3ku,.i3xdu4sv -cry and becomes fully 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 capacitor l,x sdckk ,ly9 uivuu 3.-34bghas

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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 capacitb d1jyvu 92sk7or holding a constant charge causes the energy stored in that7 b ud1kjy9vs2 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 acr;ynbghk 5/ 0fwoss a given capacitor causes the energy stored in that capacitor ton g/0 fhb;wyk5

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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 mawg 7c s,.;lxv x901thzwm.)w qixg 2to move 10 C of charge from point A to point B. What is the potential difference between poin2qs xwxh9w. i .vw),mg1 mzc07x gl;tats 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 electrjadm3(jo wb s d64t3b1 5l*acfon from point A, where the potential is -50 V, to po (t ja3da4d3c 5sbjl16b*m ofwint 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 potentiayu7lym/-k:xr+j c6np knef3jj vp 2)l4eqd,+l difference of 500 V. What is the kinetic energy of the protonpryf-mjejx)n 6+7vln+43l2j/u ec kqyk,d :p?

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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 ae t: 2)eolnlt/xmq,-x n electric potential difference of 500 V. What is the speed of the eem) qolxx /,ttn2l:- 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 p0 ke0xn)e flu9chy6;d roton falls through a potential difference of 1200 V. Whd) 6uen y9 eflc00khx;at speed does 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.wuwl:f 2b:a 29:tw eajpa6 ;lt0 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 through a potential differengmty7u x1h/p 6ce of 500 V. What is the velocity of the electron aftmx g th6p7u/1yerward?

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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 carri3ih* yry)ilhp )z6tteo h 6+(ves a charge of 20 mC. The object is accelerated from rest through a potenti6y *)tt3z+oe( yiphh6 ri lhv)al difference, and 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 the electrical potential dio0xhm ix h3b42 x*ppx-fference between two parallel metal plates separated by 1.0 moxxx0-p p 2b*h mxi4h3m. 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+4kk1:l qfe ho.tv9b p, is directed parallel to the +x axis. If the potential at x = 5.0 m94.k lvbo f1tk:h qpe+ 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 h3o* rcnh2uf5t(a,kmN/C directed toward the east. If the voltage measured renfatkc3urho2,( hm5* lative 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 directi383j w(no cv430;q clr4 y3jvwyrds seon of an electric field of magnitude 3.0 V/m. What is the change in k8wr4q css3;0y 3yc jr3w v4jvod 3nl(einetic 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 connected to a 12-V battery /grmm(gioco.p rbk04f x4 ;z4. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at pf4m/4 iomzocr;.bkg(g xr04 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, seo (ere wblz 3/ys*6x-wparated 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 kinew*6wxz3so(e-l brye /tic 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.f,rj3oly +0 iy20 m, are connected to a 12-V battery. An electron released from rest ofr0 3y+il, yjat 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 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 dw7 y w;a 3gshvs*mc0-jirected toward the east. If the voltage measured relative to ground at a gi 7 m w*g-ssh0wj3va;cyven 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 direc)xgg fhq 7gk1px5acxxn+3oh hs 4*00r ted toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the v15rgh g+opxa00 x)4hfh n*xsqx3c g7 koltage 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, iq dajw j*./saxr1)/iecqtc-b9ik 7o ,t will acquire a kinetic energy (in the absence of friction)1a9c/i.*-a)tciqjq/rs7db kj,oxw e 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 distvr; 7w9lhk n+zance 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. Find the electrical poay9j) oe;t)ewtential for the center of the meter set;ae 9))wjyotick.

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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, :9t)/txy uv ax0) 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 elect vtx xtu9)a:/yric 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 ak *. tuojou8 syxr* i+pg2;5bs -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric pot+r5tg*youp k;j28bsxsu *io. ential 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 (3.0 m, 0). If the pom7wmw5w 85f xmih4 i a/6j9ci 2dchs(ttential5aihm tmw(m5f d84h62cw/i j iw7cxs9 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)?

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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 corners of a rectangle of sx/8 yrkmalc;m9mj1 q2 ides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, 1jmk2 m/al;xq89r m cyand 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. Chxb . 16wiu)lhlarges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed c.hx) il bwl16uharges 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 +*kyb3rx 0 )s e06bvran2e, 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, eahla d7*fcc,gkh w7c bp3z99m1ch of 2.0 mC, at the corners of an equilate1hz, a7cwfc9 7 mlgh9d pc3*bkral 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 charge-f5b (o05zypors-vu5imms0 k d to 10o-zoyb5-vs0rpk0 us( 5 if5mm0 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 plates of b 1lmh 00 8ly+/ wzhz t0,9dvmkx5*rq4jxuwgvarea $0.50 \; m^{2}$ 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 by0ho.vq5 1ywf oo 98z4vxcr)y l 0.050 mm. If the capacitancor)x81 ly9q04v.h5woyv zcof e 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 cap g :c;;;tww:9,eq-x cnc qtnrqacitor 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 sepz*1jhja4c 7im(cgc +qaration of 5.0 cm. If the potential difference between the plates is 2000 V, withm ji 1ja(*+ 7zq4cgcch 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 across a 100-V battqf t6w oslr446ery. After the battery fully cht sl66 o4wfr4qarges 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 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 ca8jsdpw ,: zng o3+zmn.pacitor. How much energy is stored in thezo+:,d nsn3w8m pzg.j 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 ener .:dgzk 6r 0tua/nk4ipgy stored in the capacitor?kugp ni6t :0k .za/dr4

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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 it is connuarvs,9 r/ vb:jn9h/sected to a 12.0-V battery. How much wor 9/rha vsv/rbus, j9n:k 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 chwchl: n 7,bd8j3( 0xp 4fsvjl+n tnus6arged so that it 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 pzpiu1i )/j8go n - v1njmjx6a,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 con wfcz54 r/2(kne mlf,mzugi,.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 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 consispnyp0a u, 0vx(p2c/ku ts 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 uhb5go2z760 d lx3bee( du b2;hu,n vvwith 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 construc oc3pnj:n7vu 4;cir/lted 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 t 6u4y9zw7b7+nh,ib bln. v)fta iy 1rdo a 50-V battery and becomes fully charged. The battery is removed and a slab of diei7hfd wu+7.nb6 iyrb9b)zn4yt , la1vlectric 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 battery and becomes fully charged. Th;;b9tohe t 5x:wx uit-e 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 ace5w;bx9 u;ott- ti:x hross the capacitor's plates after the slab is inserted?

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