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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 ayti-)il;(ogrun.3 tqa cj0 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 ita*kt-fnxv g9g c,s0+ s 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 objec9,zlt06xn h zxab;efkk) yz41 ts are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potentih)n9kzzfb1k 0e;t xxlay6,4 zal?

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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 y9g( x*35/yyd ebwr wpthe 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 movik/stlmu(d.0kigevg9 z d n; .e c:-/ying in a direction opposite 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 ac 5k9mk-ted zfy97y,;nq1pnq-)pji* h rq ,yo hollow 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 re74 g j3i8dqkwdst to a speed v by a 500 V potential differ8gk w7q3dijd4 ence. If the potential difference 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 points y*54 gh szm.fs(r54cepf kt.qare 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 poic1cw(n 5ts2i fnde20mnt B along an equipotential surfacet2(fd1wnn25c ms e ci0.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfamm m(nb runf-.n/tk ,gx2t z.6ce 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 carrying a chaht 21dk1/n d vovsh) g.1bnr5arge equal to that on the electron as 2kvgthovn5a.n1sh b / )1dr1da 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 a3h5q(bs2o-sk3tz m.9zvl 0dhc gsbr+ 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 correspond1jaay7a8o /wm s 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 posi l.*dyk++3su ,)w:jb jz uzzyktive point charge is 100 V. What is the absolute potential 4.0 m away from the same point chark +ydu )by j:kus*z .z,+3lwzjge?

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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 duct2kg n6 x1,- qdx/vpistance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m xn,gvt-/1 kc6d 2upqxaway 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 squarzn7e4n7 de3 t)t upi.ue is 3.0 V when a charge of +Q is locz u d37n.t4 tpie)uen7ated 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 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-dofz o mlpx8/m,:p-d V when a charge of +Q is located at one of the square's corners. What is the absolute potentiappmdd m-8o x,fo -l:/zl 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 tkf /t/ d0z-gyjwo 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 is am qvn08bng2 k. mdd;c5y.vsu +

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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 on41 r7s pf tpg-m:shp2 p3o0nnqe has twice the plate area of the other. If the smaller capacitor has caphns1po4 p -7grsqtfmp32p n 0:acitance C, 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. If the area of the pla:jt9 hg 5)z wew8dz(gdnxng;*tes is doubled and the distance between the plates is halved, wdgx ght(z8n)j zn we9dg* ;:5what 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 fully and then is q ph af2rr3da5:v9q5i removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge o3q v5qf2rpi:dr 5aa9 hn 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 plates of a giv+pdyv5s;c ,zj en capacitor is weakened, the capacitance of that capaccyv+ d,pj5 zs;itor

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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 capacitoww mrz*hl.a3u+ ,q0n ur are maintained with constant voltage by a battery as they are pulled apart. Duriqr,mhu.3+0l ww*a n zung 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 maintain siik,+yjlv1v fl9f+7g u t3f:ed with constant voltage by a battery as thvf+1l7yjt9i+s 3g lf, kf iu:vey 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 fo6z8 ghrs y3n2sr adding a dielectric material between the plates of a capacityz s8gs 623rnhor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material2; oc/cwy/piwpe5fz . such as paper is placed between the plates of a capacitor. What happens to the capacepow;yizfpw/ /.2c5 c itance?

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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 p*2kx;f ei nx8taper is placed between the plates of a capacitor holding ;x8e2 tfx*kina fixed 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 eh9()ug km,cr 9,hogi kr0 mt5battery 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 uech,i9kot0k )g rghr ,m m59(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 constant charge causes tb5p py)mgp9m kl*lplr7s *e)*5 z6uu whe energy stored in that capacitor m6lgwu ) ulk* *59psp75e)b*pprzm l yto

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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 : y(v+wvnu6 slcauses the energy stored in that capacwu6l (:+v vsnyitor 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 a2xs )ttp- k 4jgmp+g :l((ndfC of charge from point A to point B. What is the potential difference between pointmj x() fap:24td kg+-sn(p lgts 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 p2 kf,i sd)(hpqoint A, where the potential is -50 V, to point B, where the potential s2qki,)(h dfpis +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, g/+21,ugqv, 5 gzcc 6vebgtv zis accelerated through an electric potential difference of 500 V. What is the kinetic energy of the protonz,evggct5bgz6, q 2vc +v1/g u?

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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 throuf)yo w;lg 6z6ggh an electric potential difference of 500 V. What is the speedw; flz)66go gy 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 potenti8 zf)k m;unyhdo-7 u:cal difference of 1200 V. What sp;z7) dk-uym :uchfon8 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 abics0r+yr wgg- w -i *.ndd61in 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 ol:o;oxxv (w )mf 500 V. What is the velocit()xovoxl m;w :y 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 accelera l7f0jou acf26ted from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is theau lc0fo276 jf 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 tn typyz;:g6; fhe electrical potential difference between two parallel metal plates sept:; yp;g n6yzfarated 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, with a magnitude of h ,,xgcu1lxj4 rw;rm zgd-;yf.2;xhx 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is1; g;;2.l fx,-jryuh,czd4gh xrmx wx 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 towardn0pp a/vq 9rn(kdaun1, mj7ryi2s(;y the east. If the voltage measured relative y, i9m v21qur(j/p7ps0d na k (a;rnynto 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 alj9)d xv90 x wdsy)eyz6re-qhlr)xk(9ong the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of th(9-dxly jw xx rrvse6ky )hz)de)90q9e 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 -;ga govc)g0daybn.5lml, ) ka 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 bc) gagmd0n; )ak ,5o.llg -yvm 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,u22 txn2tg 42)cqvarv 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 qca2 rgvn2t) u2xtv2 4from 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, separatedws lwm5orqs58)/ -vb v 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 a sqr58)wms 5ovw-b/vlt 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 du* x 6tj52y6z iw89ynru /4sbu/vei qzirected toward the east. If the voltage measured r2z 6u8xei4v9j/z rbuyiq tn6yu/ sw*5elative 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 8xepjfsh9 -)q*jn(cuN/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 hqp jncuf8*es-x ()j9 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 acquire a y g 21ui1qxedtno.74g /ehfi*kinetic energy (in to*u 2fdegit/.14 qyh7 xeg1nihe 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 potentiabqj+(3 dks2vbr 2-/ hz mj;lc:;ztq drl at a 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 )xsj ;lyrt*;r; fhg- fends of a meter stick. Find the electrical potential for the center of th*;; hsj g-yl;t r)frfxe 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)2ii:p;jfpsg / iz1ld a -2.0-nC charge is at (3.0 m, 0). If the potentiapl2gi:z fpsi ;d)/1ji l is taken 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 tl sed5l/uli-;fs n:)g:hg0t a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to0dl:gutgle;:5iln)-f sh /ts 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 (3.0 m, 0m:binynwq: 9llyq39mr36 ;do sj)a 6k). If the potential is taken to be zero at infinity,:krl9j y :;wq3y 6 bn)6qodalin9 m3ms 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 co7 ma9e;kyki) zrners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, an mk;a 7k9)eiyzd 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. Ch5 mb8* sv j s5+-159coeklbgskcjy52q ba/m ikarges 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. What is the absolute potential in the ac+m-cmjqkg5 95ssbe2yk i *s/vk b 55bl81ojsquare'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 (cham5pw0ea e 9 y;n8b*ik6:mxjroe4yy c6rge +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 necb70hfeekr ho7w,vw:j vk5j14 essary to place three charges, each of 2.0 mC, at the corners of an equilateral triangle of sidef whho 7r51v vj:4bw0ej7kke, 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 0i86h6l, p)dp:tjeezwz7 arvcharged to 100 6whd apj irp6tz0lz)e: 7,ve 8V?

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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 ofbq b7xra9g yv)3,+ oabz0yv-d 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 arlwh j4v vsz31i)+; lwve separated by 0.050 mmsw;v+ wz)1i3v jv 4llh. 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 plates of area4vhp0 9p9dmd .nlia3y 5dfis( $0.20 \; m^{2}$ 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. If the potentia9yn++ 9lqoo ysl difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric 9+y yqo 9+slonfield 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 battmtt)p /h hnvvx(( v6 +ou5hz)yj+czd+ery. After the battery fully charges the capacitor, the capacitor is immersed in transforv)ov/d tpxyv (5 +j+()muz hnzh+c t6hmer 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 pla 8de zc;gk -9()wxstfrced on a 15 mF capacitor. How much energy is stored in theg (x s)zrkf-8wec9t;d 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 cap 5v ;565vi0ztatj 2wc4 f3ebzrajsin :acitor. What is the energy stored in the capacia56afj5si:;bv3 4injz5re cw2ttz0v tor?

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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 whetr qa4rog 7n-/d5 -vie2dj1qen it is connected to a 12.0-V battery. How much work was dod2/ 4j-5erqti rev 1gdq7oa n-ne 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 it storer6l7igbsii, ,ub 61t us $2.0 \times 10^{-3} \; J$ 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 consisi xr3 9d:souo-n7jan2ts 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 yt btertu(b66( l l*.o+1dyrqof 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 of a b- or/smh o*i3c14bjhrea $1.5 \times 10^{-4} \; m^{2}$ 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 platl s )d/i e/yaiza3xqez7088n5knd*l p e 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 capac/ad)valkd: is di ybo g:4(tw(ko8g62itor 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 is connected to a 50-V battery and becomes fully charged.t0igku 9r;r3 c/w:xrg The battery is removed and a slab of dielectric that completely fills the space between ther3c;gkwir rg9:u t0 x/ 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. Tm5bskipkzw*/x q0 0- pe 6k(hyhe battery is removed and e- (yiks5pzpx6 mbkw 0/qh0*ka 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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