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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 vg(g k6pp0 4ns23aytwlector?

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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 q488glw 3f(ye-mk:, tv i / vabkgis4ha

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum objacy(;dy 36h st ijj0,wects are insulated from their surroundings. Object A has a net charge of excess electrons. Objeyjhi( ;6ys ,0c d3ajtwct 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 t . lw) mnxpart*6fn.nudls8e.0hr8 -rhe 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 to the electric fieyuh4fp2h oj5jdt:, a *ld

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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 conducting spherejul:-*o gyre1 . 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 potential lmly-pcy( dvx3,bk;(difference. If the potential difference is changed to 2000 V, what will tll3yb(cy d-, mx;vpk(he 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 po,lfo8:gcbr ,b tential 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 equipo5 i wkg-tu t s73kv:m5tf:wv1c3d x+vjtential surfacei-f sk1v5c v37:+uxktw3t:vwd t5gmj.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface m 1 d(5hci4yp j,dvgdmip*ph4(:ge 1 fuust 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 thalcss1r) h-8n xby7mp3d53tvm t on the electron as a result of morvmmyxsc )71b h8l3 dptn53s-ving 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 unixmpita2ireg 786,9hifb +z(9 r,gavs t 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 corrdr: nu;p;8qn6y4 gw8anygsh5esponds 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 charge s no /;p75x upqry*r4bis 100 V. What is 7n*y/xu4prrs5bo qp;the absolute 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 s*s0bmt ck c9iwed(f1v(x-k. from a negative point charge is -100 V. What i- kevxds.s 1b(0 *wkm(f9ctic s 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 ch.lpbjf: kv9j z;x94 fbarge 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 ax ; 9pjjb :4lfb.zvf9k 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 thfy6nqdj1cg3 si 6ce y:sr. y;-e center of a square is 3.0 V when a charge of +Q is located at one of the square's cornerd36i.s6:;c j- yn1rscy e fygqs. 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 charg 5n6zmo-s1(r ekwbv7xes 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 is a0lrfsba+1bm2)r ju0p

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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 iden 30u*df4zktwmuis (h2tical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacit*fus2mt u3( h4 zdw0ikance

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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 3vjsxg .n j3,djpfz9 c x/.p:pof the plates is doubled and the distance between the plates is halvep.s/dz3npv ,j3p x:.xjfcg9 j d, 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-7+pl lznx uha -q7*p.aplate capacitor fully and then is removed. The plates are immedia7*.nlz+ palxp -hu aq7tely 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 betcuz+mf; 0hh 2pwj9nw2 ween the plates of a given capacitor is weakened, the capahw2pm0 uf2j+wzh c;n9citance 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 ma5 .t (5n o).ee.:q6u.hm dj gqjrz/hq4edir ciintained with constant voltage by a battery as they are pulled apart. Du hj5gi.ndr ze:qqe.)mje .id6q5o/ .cur(4t hring 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 mainth9iav rb( m 48*9kiaj08gpv-czh)synained with constant voltage by a battery as they are pullenv i9iz a98)(kp mhb0rcvhjy- sg48*ad 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 fid-)uv u4vl 1lor adding a dielectric material between the plates of a capacitorui)vulv4dl 1 -.
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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 place26hql 3/2zk: mm w4o*t8aarss o*pkay d between the plates of a capacitor. What happens to s/o:hayt4rk az*lwm *8pas6 322mqk o 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 r.as.ge( ma758 p jvpvof a capacitor holding a fixed charge. Whap e8avs(.7rp 5agvj m.t 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 charged8 ; 3idjl3 tcob3w0x5pi )hxgo. The capacitor is then di;3o obt)5i dxxcw3ijlp g0h3 8sconnected, 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 constapvn qm-qph.jw v4 +20jtc,x 5bnt charge causes the energy stored in that capacitojm4p2q-xwqp5v0hvb. c+ tnj,r 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 causes;4yoxj2jj7 u 24b(fb7amwoc g the energy stored in that cjoja;yw2m (b x7cju4bg47 o f2apacitor 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. What iwi,myl2 )k98q xhxg0 ps the potential difference between points xl ywq2mk,)89pi 0xhgA 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 n gm4pw+a ,)5xyrvon4ving an electron from point A, where the potential is -50 V, to point B, where the potential is +50 V, i n),y 54gvpxrm4woa+ns

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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 potentialnsse)yak:(w2,cl qbo1o )y,q difference of 500 V. What is the kinet2qa)y,oc ,ey) ks:qwonbl 1(sic 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 tm+xh v ;rquy4apn0.gmop63y :hrough an electric potential difference of 500 V. What is the speed of the py3g ;.apr y:v4mm6pnx0ouqh+roton?

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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 V08gqihwb) ck zc68 utm6(euhxa27h d ;. What spee878 u;zq whiedc h0ck6 (xh6gu ta2mb)d 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 9.0 V do in moving f /q3lzho o of41dk2y/$8.5 \times 10^{18} \; electrons$?

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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 accelera8*1j j noefg+rp,0:o(v m:gospxanu(ted through a potential difference of 500 V. What is thgan8xvn oo1 0,*e: ((+pmsfjrg jopu:e velocity of 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 charge of 20 mC. The object is accelstjqid 2cn1o+4p)n e3l*oyji1 bb 0k 9erated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential differ10 dpclojj1ts4n2 )bkqb y+ io*e3i9nence?

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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 differ9hr5(uikmwm ru xx4/1mm 1w9bence between two parallel metal plates separated by 1.4/kmxb5imx wr1uur9 w9 (1 mmh0 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 magnitude of 500 V/m,3-7ea lo:cq0 lpthl-k is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the aol 7pk3el:- 0hlct-q 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 dsi77m,sj* ey 18yfn i )h3c rdaphz1(hirected 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 dpy ieyhn311r,ji hsf8 a)hmc 7*d(zs 7irectly 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 direcyzh5a wk0wol03 dk 0 j/4fjwl+tion of an electric field of magnitude 3.0 V/m. What is the change in kinetic ene0wa0k5k w jfyh0 3djol/+wl z4rgy 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, a8k 1-jx;3es;qkio oio6k.zmb re connected to a 12-V battery. An electron released from rest b k.o3e 6ik8oom-izqsx ;k;1j 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, separated by 0.20 m, are connected to a 12(kz+ n t, 0ksmqd3ds)u-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the elec, 0ukqm(k3zsd)+ sdtn tron 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 09dak9 -t cbir:v5q:kk;jy z ,o.20 m, are connected to a 12-V battery. An elk : -,cb5k ya9korjz;i v9tqd:ectron 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 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 tow te7m)n(yz5-xnisqw qo yd0n0f)q6u .ard the east. If the voltage measured relative towsqzm .y)ntx)q0n yi0nd7 of-5(u6 eq 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 p2o; t)i su*8)85jc cwkfpbwe 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the fielkto*;fecw25)8icw sb 8 p pj)ud 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 will acqvkw36p3t8fnoe:/ i 3,t(tzyc t4fcynuire a kinetic energy (in tkttv6n y : o33tecw4/f,yt 3znpf(ci 8he 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 dirmtn.m+b dj(zsy . 2j*stance 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 ,e wcg n5b -jo,l 5ca).ebqc88zqb.hgelectrical potential for the center of t-g5b h, 8g)qnqwe b.c zb, ecjca.85lohe 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 (3.0 m, 0). If thatrbcc ( 2ydxt0 o ,6n*blc3e(e potential is taken to be zero at infinic*n 3e x,0bd 6(bot2layc( ctrty, 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 wr:vnp1tgz5w (k jpjef*+xr )*: yk.vcharge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electp*vz vf1 rj .w+rxp5jt(nw)k:yg * e:kric 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) and a -2m cr-9eq f2s5:av 7wly.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 fromc7vmqr:w2yl s9 f-e a5 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 equalr07/mvqt p 125iuzhnw g5z 9xx charge +q are placed at the corners of a rectangle of sides a and b. What is the potentq v wz/p ghz21rixn5u5m97 0xtial 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 plh j7abng )le0 m:8943hzy7yn ddl3xhe aced in two diagonally opposite corners. In the other two corners are placed charges of94)lg08yn jxhl da:n7b3 3ey edh hz7m +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 +2e, masd)expu5t+h,ke c2gyr(nx7 , es $6.64 \times 10^{-27} \; kg$) 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, eachkt1+/t (gxi pjxgr6 4;7fiagu of 2.0 mC, at the corners of g 7tu6ij 4/ax(rt pf+kgx1ig; an 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 pc ) g:8mwgebqo +y sg1bjj8;w)lates of a 2.0-mF capacitor when it is charged to 100 +sw)qgb:jg8oy ;j1mebc)8 wg 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;xxp4l0 4p5yeq.w gxi 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 thpx.tu mn/ 2 e*obrjr:1e plates are separated by 0.0/rb*trp m: .e2x1juon50 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 capacit u :sps7 h/6if. sfvj1q5gc.pyor 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 capaca :svvvh-+ fch;wno6v b*9,k es,d(kxitor has a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field betwenh;(xod9 k,k,s bv-+ vec*v6swva:hf en 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 battery. After the bat: p7, 0c/+c .tdtver xlysq:kp)ngb 2xtery fully charges the capacitor, the capacb/pd:cv7gpt+s,x0: x 2lknyrt.qe c )itor 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 is3oak6 sw8c 7 1 klfnmdhztu,:/ placed on a 15 mF capacitor. How much energy is stored in the capacit3t h8kso/7 caf:1m6u,wzldkn or?

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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 eb8--bzena wz3 nergy stored in the capacitor?n3wb-zb z-ea8

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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+57db ikfyzb+acitor when it is connected to a 12.0-V battery. How much work wb5f7kz ib++dyas 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 i)k9air,h 7 ),jwqdb umt 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 capqa5gl:)eregdobp* y*7 gi. l;acitor 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 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 capaixxj2g +j90iv h/e3pwcitor 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 consists of plate .*na gt zg.ni*nc;w(nl36anas 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 capay9 6qzcqqzc33) ,vmvecitor is constructed 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 constd+v:,clbga 9/1a 5+lyj lwj fwructed 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 battery an0,b5va ar -l9fmia-uv( ea.epd becomes fully charged. The battery is removed and a slab of dielectric that completely fills the spaumva.bfe (pl0i5,- a- er9aa vce 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 beq9cb ggtas /7fqrp; dnn0x.05comes fully charged. The batteryqns7q0dc;p.r5xbf 9tg g0/ an 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 slab is inserted?

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