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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 b5jia0w .pz + mt,+w.+zhsuchnot 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 coulomcly dqw.cs8yub8)pq34 ; sbt2b 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 suf+2f 2hkahzp/1o 0b f20a dphurroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potenti 2oa+fhhz10p 2fhp /b0fkdau 2al?

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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 el pbt)rwawh46t 2 l3fr4r1a6alectric 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 electrh 4w( -jyl7mmxic 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 conducting sphero4z-jeltd8,2tu t 1f v;sssp*e. 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 to5..(s.flyk;lsxl faa a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed ol a l(k5l.ay.x .ff;ssf 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 plnb j+yt+wwz,u .x+vk;ii f/6w* g9vwfu47qt otential 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 poin6: b4-qzvcqlcn e59i0l -xahf t A to point B along an equipotential surfacel --4icnqfzhbl 09a65 xq:v ce.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mus9a4zdj88:7( jjylb4s y ewmqp 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 ntyu- h 0(c+jmb)mij; a particle carrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is referred to as+yj n;)mtic uj -mh0b(

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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 ofa9q i5f*aexu c8 rc;d0

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresponds to/u wb dz1d4ovlx x7u9k:wi n-;

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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 dista zctesik) tb sapnh0 *v3c01f,.0sbk 6nce of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 *3c f asetbpk)1h.,zt c06 00bkvssnim 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 from a negative pointl:d wz6*i txa* b+k6 luq5twu)x4ir,l charge is -100 V. w* kl4,66la i w zb tru)q+tlu:5dx*xiWhat 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 cha 6. --e j2ltx,sf rur4vtznl5nsd8c 2brge of +Q is located at one of the square's corners. What is lfd2uvt -r4js z 5s.ncl-brn8x2et6, 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 adp3gp;m c8i.yqus.rs/p9qf)ki70 r rt the center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is trrrs 3qyc ;qpuiis)g. kp p7f8dm./90he 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 j5i0h mk hrxfne5z/h o :oe1.qhw)g3/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 fs6og+s0ir 6 erc70uuis 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 except that one9/z2p.l jn2ti,m a rem has twice the plate area of the other. If the smaller capacitor has capacitance C, the latj mi,n/9 rp2m.elaz2rger 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 plvz-zh*) )6-bs l czw+mrtciy)ates is doubled andhb)w -v6iltcs-)z+y m cr) zz* 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 fully and then is removed. The1i,a0z y w6./wxpg tgp plates are immediately pulled apart. (y,wpp06z tggx1ai w./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 between the plates of a given capacitor 4 6hdsbo zrihi75famm-r z4 61is weakened, the capbdo-rm1 56r ifh7 4mz6szi4ha 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-pla)uk6 3afiwl l7dwz*0trmt:zhi 0 ow63te capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the am):373fm06wll tt ioz6 0 wridhuz akw*ount 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 wi ywhn sv (skdlm5/ee.s.+ea 5/th constant voltage by a battery as they are p5+levmew5ae s/nd( .y sk. /shulled 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 d, r3l. rzy8o yc9qdvv27.a oo-grq*ncielectric material between the plates of a capacia ,yvgn 7r3dr 8o2o-*vq. ozl.yrc cq9tor.
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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 plateso e /mfvxqt-5: of a capacitor. What happens to the capacitancemv f/tqo5 x:-e?

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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 betwb6o8m/3,alx fcr-e jjjr-x : peen the plates of a capacitor holding a fixexrmj8 e/cj -6:lx,a3fp o-b rjd 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 i ht3ux0em)g0fq8f5mf0 y d :ets connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation e mfh0x 3 )qfu58ft m0eg0:tdybetween 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 holdinqxem97 lc.pl4 n1v7jcg a constant charge causes the energy s elc7.nj7vq 1cmpl49x tored in that 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 a+mt/ oe d(ntn1bmr o*ml.qp.5cross a given capacitor causes the energy stored in that cap1 ep+.mot/o md .5t*(mb rqlnnacitor 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 sk.tkqwz *xnq+*t l sv4( cw n-)sn-i:charge from point A to point B. What is the poten*wswtqv* t -n-)k( sn.qi4zck+n: sxltial difference between points 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 potenti6 rm6ts-3i5 bd-ameliy3j6klw :h g v: ,i0tyzal is -50 V, to point B, whelmswi ae,v3 ihk60t5gj:y m yb6 z -d-3il:tr6re 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 a *5hh9ne ka++s2 prgxwn electric potential difference of 500 V. Whah+rwa9h 2 *pg5nes+xkt 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, is accelerated through an electric potential qpns2q.p:wxo 1*o - evdifference of 500 V. What is the-pxo .p * veqsn:oqw12 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 diffe0 * r. ola5fp7cqlfojbv7ja93rence of 1200 V. What speed does it acquprj 57aoajovbf9 cl q7 fl.30*ire?

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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 mo 2qtghmhh6t4w y,xq73:je: ka ving $8.5 \times 10^{18} \; electrons$?

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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 anq:e4 5c skz8z potential difference of 500 V. What is th 84e5znqcs: zke 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 acf;/;afson(uf) 3x dx9jq wdd7celerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potentiu f/;wj)s ;a 7dn 3xxffq(d9odal 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 difference-qce-hufjfvk e /o +dk)2qu-zq7v*:l between two parallel metal plates separated by 1.0 mm. What is the electric field betwev-zuf+f- d*ev-/oec2 qjh l)k 7uq:qk en 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 4:9h al) wepp6l) aurfV/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 25uhl6 )a 4wp ale)fp9:r00 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 fie oas :v-rtp(5nld of 50 N/C directed toward the east. If the voltage v-5t snora:(p measured 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.h)5 k* s.wni)gwcqmmp j4b( v along the direction of an electric field of magnitude 3.0 V/m. Wha bg (jk4.h.s)mmvcwipwq)n*5t 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-V b, xyu,cya n*;ewo 8,fm l5flm 7bp;pi9attery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distac;fmllo amu95y*e,;7wy pb,x f8i p,nnce 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 conn5 ce2 vzkdz3-dected 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 kinetic energy does the electron gain3-2 vdd zeckz5?

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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 o3ww;c5o2j mbbio-2s 0.20 m, are connected to a 12-V battery. An electron rele o 5b2bo3i;2swcjo wm-ased 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 toward the east. If 1tkb68;rmy96w(h rvpj;nfq f the voltage measured relative to ground at a gi bryj8vr 6f kn(m1fqhw;; 9pt6ven 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 directehbtt9q5ph9ky .7qd p ;if;a)md toward the east. If the voltage measured relative to ground at a given point in the field is .yhtfq)pi;9 h7kap;5qtm9 b d80 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 ac50bq )z q iihgmy/,0ibquire a kinetic energy (in the a q5 i0hbiyb,/m 0g)ziqbsence 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 atm x9*q2rf3ni2 ek0ps h 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 twk3c -bcgmf48o.qo e3he ends of a meter stick. Find the electrical potential for the cqoc8wk 4.fg3e-3 mb ocenter 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 (3fb57,f1 (ymjmf pe5kx.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0,pbm jf5(xf,1m e5yk7 f 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 (0ub err3vgmr 571.l*ir , 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taveg*lr3.r7 ib 5r mru1ken 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 isb+p 7:xadk ;.1dexwrn at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a k.nxax:rp + dd ;7ebw11.0-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 rl.h c 6kp;y ;5+enkcbo o15txbectangle of sides a and b. What is the pok5h6 eo cbkoy.c;5t1;nl xb+ptential 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 placed in two diagonall6b j-+)yyu0f,r jc+bxwo3laxep - ln/y opposite corners. e+)ax jlw/nf-r3o bp6cyxju0 l ,b+-yIn the other two corners are placed charges 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 +2e, mass1x,nkmxvma7f3gd: zix rf7.3 $6.64 \times 10^{-27} \; kg$) 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 necessar+a2io5fu, ng ny to place three charges, each of 2.0 mC, at the corners of an equilateral triangle ofaf2non+i,5 gu 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 of7h e1 g5b8+ ptze *.kquqy00sp q3erfx a 2.0-mF capacitor when it is charged to 100q8b*xe7+gz531h. fpkqeyqsuer tp00 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 a21dro m ,s9k fk4cq+naksin-- rea $0.50 \; m^{2}$ 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 uassg0lgw .om3m9/ j0yh/ q9tseparated by 0.050 mm. If the capacitance is 17.3 pF, wh0jlwths.g //9y93mqau0m gs oat 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 gdq/sosmyeg9:* i *,- 8hvfrbplates 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 c6f98ycd6z kwplate 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 e9w 6fcc 6kz8ydlectric 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 conneajdu/ m a8g,x7 )iuq7bcted 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 battery, which remainmix )ga,8qudb/j77 ua ed 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 energy h)lb r*/g t3nf(vi6nfis stored in the capacitorn(v if n*/fr 63tbh)lg?

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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 capacitn; nprd9 w* *o(qhrvm*or. What is the energy stored in the capacitord *r9 **h;(nnwrmvpqo?

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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 capacitoaq5y fnkr + pm)j(tg/-r when it is connected to a 12.0-q/nkp( ma+-y5)r fjtgV battery. How much work 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 chjn;u0 be 9+fq:4mx2vxf nck5sn0 rl2harged 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-iuqpg-)n89q s ulcaf4 cb.. k ikj:-s 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 capacipvdljqjd:scvl3t*0f) tv3h548j vj; tor 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 capacitorpex,f aov2c+ 0lvep6pe )k8vj, r)xe*i6ofy 4 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 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 clwas ;v ;;qn*ot:k0s-lk6fb 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 constructed with plat)j lkrwk5479+svx wio e 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 bat, swwh js)z0kkb9oa06 tery 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 aftebhk90sskw, o0)azw6jr 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 connecte:7v,r pxa,fxjy q2;c7gd ypp.d to a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric thj, a pr 2dp:7q yx.pxvgycf;,7at 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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