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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 isj ud3z vj;u7(mip sv00 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 isgy 5m,)2incov 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 th) wqkuv:ov8 37fisyxs83kw*n yq-o b1 eir surroundings. Object A has a net charge of excess electrons. Object B is gru o7 iqykb wq3 8-swvn*1yso3x8:k)vfounded. 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 tu ,i6ajhtb pbf/fy2hy15 yc.5he 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 electricv9 qzv v ,wn)h wkp j g)uxd:t6(*d)cz*ej37pi 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 holwf/3e3 o /hbetlow 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 from rest to a speed v by a 500 V potentiaqp(ac91.m 3oiyxehj) l difference. If the potential difference is changed to 2000 V, what will the new spee 3(o1i)cey9hjxp.amq d 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 potential is refer-dq da x.o5ydu9vlb;7red 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 rwdd n89i z9qy+ -q(1wmzv;lrA to point B along an equipotential surface(w+viz1d99m n8zqq y-wr;ldr .

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface muscdh;: fgm/qgsc/q0qj(u,us ; t 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 tov.x 3i 8ni2;of7;l d) xluesrc that on the electron as a result of moving through a potential differld 3l87iexx isv )r f;cuno;2.ence 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 a3rs s6xo21sn x 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 correspon3 p89bxvi (tycds 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 distancey/r2j/6; 1zpciv b ;lphoff9e of 2.0 m from a positive point charge is 100 V. What is the z/r1;yl cibe 6jp2 ;h f9/ofpvabsolute 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 potentiajeh)4 8ee6-u,,fgxz vkc zj7 ll at a distance of 2.0 m from a negative point charge is -100 V.6xcf ,,v)gkez748zj e -jhlue 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 3.0 V when a i+c-yh t0wbw+q3a5gr+j6 m bxcharge of +Q is located axhty qj-m+ w0bbw +6g3i+rc5at 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 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 +a nm8fb(uo6dn92 xn7 6uoywb.y iu. jis 3.0 V when a charge of +Q is locatedmo+n(o9 inbu26.xd uya8.b yw6 fnuj 7 at one of the square'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 two charges tha7b6 3.haofy+n- ws:y z1 mtsyzt 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 5)f/wgk: )3scrfsz omis 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 rettde c5i: c*6espect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the lar:ttd 5ie c*ec6ger 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 oftn 5 6x*ot 3p,dniei,o the plates is doubled and the distance between the plates is halved, what is the nee56*inp,t ood,it3 nx w 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 capo jwf;xjgg)z y/:g1 (dlf(6hzacitor fully and then is removed. The plates are immediately pulled apart. (With (yz1g;xjgfj)ow6 / g :(dfzl hthe 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 d2wx,wz9 a:sd between the plates of a given capacitor is weakened, the capacitance of that cawa9w s:xd,d z2pacitor

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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 ca18 u7w8d e,57k xmwhc:rdzw8:gdreexpacitor are maintained with constant voltage by a battery as they are pue7e8dzwr5gu 87:w,wck 1mxh8 : xrdedlled 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 with constant -o(dh vd8ef*(yml v/ nvoltage by a battery as they d*(yvfm(-d8 le/h onvare 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 dielectric material between the plo-jo x/ x51 ijso0k:yx1ng a+bates of a capac+j ai15okyxs/1ono-0bx xj :g itor.
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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 between the pc+vbk -snj is0ga/ 9a5p)c qt)lates of a capacitor. What happens to the capacitances5g 9) qvtb-j)paac i /c0s+kn?

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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 pl(89:8nv)z*7 dstgpjd bjinj sates of a capacitor holding a fixed charge. What happens to the electric fiel7p 8j)dds:8nzvj b*istg jn9(d 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 ijsd8/e bgr+v*bf sxz7.( rc q u8ax00os connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way uo rj7b+afq.sz s 0c/* gx8( 08dvrbxethat 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 cnhi (;dvl3 y:c*xci*,u igz1 uy57xgfapacitor holding a constant charge causes the energy stored in thaycivi:yxg3f;nl* 5u,* 17(gdh czi uxt 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 cause 5p5dn //kgdf.zm-xgw nj*3lx s the energy stored in that capgm* -g/d j35knd wx./np5fxz lacitor 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 1eu q cc si,(.fd55n5fi0 C of charge from point A to point B. What is the potential difference between poine5ii ,55 fqdc.f( ncsuts 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 electron from point A, where the p +x tj;z 1 gaf.j05xjwh3n8nliotential is -50 V, to point B, where the potential is +50xaj+0j3fwhj;gi x5 n8.n lzt 1 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 .dqonm/d1iww(l+sc 0differe1nidwq/o cw+dl m0(s.nce of 500 V. What is the kinetic 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, ph ty04 qvqz ;ac7+occ;gno -:is accelerated through an electric potential difference of 500 V. What is the speed of the proto0qc q+ ztcg -co ;4hayvn7op:;n?

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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 dd)/e.e d:vwlw ifference of 1200 V. What spldw wd.:ee)v/eed 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 in4/ctdndjegzw3b) g 9xi41ct vi5/gn 6 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 dx08d y8arot ;b 2xl)kthrough a potential difference of 500 V. What is the velocity of t)xd8 ady 0 trlox2kb8;he 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 ofa )9;fuft8o bf 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 maf8 foabt;f 9)ugnitude 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 mainm)j(t1llqz2 qtains the electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric f2tlzlq jq(1) mield 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, is directeda5vdh (a( 0zzz+l +qjk parallel to the +x axis. If t+(z 0kzq(ahaz vl +dj5he 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 toward the eastnensl7w:d:4 h . If the voltage lwnds:7 :he4 nmeasured 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 a ;f.1m(lyv*d ksoq, .5i lkc.ytngk7along the direction of an electric field of magnitude 3.0 V/m. What i ;t.1m g.ovllkan5s yc.q,k7ydk f( *is 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 connected to a 12-Vber0d1r 4zbl b wgzz3l,) -h1/ivsn9s 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 the initial and final points?4s/ 0),ir1 el- sg9 vlzbzhnb1dz3br w

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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 p9thmfw(8hu x 5 v:j5mab fb-: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 positiv-j a(wv85hm:pf5m xb fth:ub9e 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 vgr5 4 bfp xvvrwvlu(+8zso9 (fc1, g)12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the ele8x(wco(v+v5,)rfpz f 4rglv sbvu 9g1ctron 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 toward the east. xfq:.mmi;) . bs/bexdIf 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 di.eqdxfixs/ b;b m)m .:rectly 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 ,yn. 6zeqmwv89 qct)ob+lf 5vfield of 50 N/C directed toward the east. If the voltage measured relative to ground e y+bznv5c6ot, wlf)9qm8qv.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 d1,t,reg8vvo + tapk9difference of 12 V, it will acquire a kinetic enep,d 9ra +v,e8tvogk 1trgy (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 aot0 .wsaaot+a-h d;,bu*i n 0t distance 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.fxrw 6mn81wbfh1 7lp0 Find the electrical potential for the1fp71 wf6ml8bwx rhn0 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) and a -2.0-nC charge is at (3.0 m, 0). Iff,yry0p)rfz )b a)ti 3 ov)9jf the potential is taken to be zero at infinity, whajrbt )a9o v3y) 0zrpyi f)f,f)t 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) anhrp ;*bg :mjh6d a -2.0-nC charge is at (3.0 m, 0). If the potential is ta g p:hb*jhmr;6ken to be zero at infinity, what is the electric 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 -2.0-nC charge is at (3.o (x.puw;t ac b1*, qmn;:jwyl0 m, 0). If the potential is taken to be zero at infinity, what (w .c;ltoxyqp*,1num jb;: a wis 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 s 9 t :y2.swc9stlyumq,ides a and b. What is the potential at the center of the rectangle y .t9wsuy9 c,2s:tqlm 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 diagon mz y0o6a236o kaxhjwpd6:36doiqg. ually opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential in the squagxz6i: 3 uadwoo60md 26j h.y3oqpa6 kre'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 (cha u6tytlu 89qc,jy*p, *mr.zb crge +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 .2 tmqmaogu*n xug.72three charges, each of 2.0 mC, at the corners of an equilateral og.22tnqg m x*u7uma. 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 charged to 1n-64nr gfkht xp:yb1fpk kou5 ;s)4.a0gt kfkhp6fuy-po4n:kxs5 ;4 .n )br1a0 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 area9y9lm4tvd hl3 $0.50 \; m^{2}$ 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 sdtcd 2 80j,:j7z/altutfevia6 ul7zne); o)j eparated by 0.050 mm. If the capacitance is 17.3 tn 7oaj0tz7at 2ed/ z8uuc6i;,df:) vj)llj epF, 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 platef9yjs xh*l0(jn4r axa4-znr ;s 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.i -4i(y qmd0tz1a,.;kj yxp wu If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between the plate.ix tiq0-jyz(u,m 4ya1 wkdp; s?

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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. Af/voy:/bxp(9 jd)t:*nthnc 5 joum)vg+hh t0jter the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric op0dujhnghcntmbo/ t v9( j)y*:5x:v/t)+hj 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 capacitor. How much ene;gwsv0rz 89x juh7/nurgy is stored in the capajw 78v ;hsxg/0ruu zn9citor?

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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. vski+zj 42io 1What is the energy stored in the capac2 i4ioszj1k+vitor?

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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 c90k(a.)b3c dv/(ey b vxmvyuponnected to a 12.0-V battery. How much wory)(3yckpu/e ( vxb9dm v0.ab vk 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 i 7zo7t4 iqle/es charged 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 plates of ar+x*u axrlcq9tx - /:9wabnrp8ea $1.5 \times 10^{-4} \; m^{2}$ 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 consizbc r4ih0a;kj968wi 7sirdn; sts 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 plates oeweis6+h(/p l f 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 capacitogmb2h9m5antj c9d-*f r 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 constructvi3 fic5d)2x: m9c,ls +qnxkped 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 batterygy .+b4 r4wsayq 5i5yy 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 5.05y44 sg yyq5.ywar+ bi, 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) q)l7 qs6fxyiw--qs*ybp)k r 3 l/zcm becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the diele7)s*c)k pyi/br y xq6fqsqlw-l-) zm3ctric 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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