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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 4 x040d6- lsblkpih glnot 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 i*7o( lm ;( jd/hxjj m)2s3 nkuc,mwgqds 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 obje+ew;af hu:s v wc2m7+wcts are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object isw; v +msw7f:u 2hce+aw 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 of the elept/cp h7u1s ;2lm ;dtdctric 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 electri (5 qgeixlm qgwj;n b7 p90we4ve91nj2c field

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Several electrons arm8,b3 .oonazne placed on a 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 aa (g /ifvz)hx+ccelerated from rest to a speed v by a 500 V potential difference. If the potfh(azx/ +ig) vential 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 are atj mmyg5d7 yz;- 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 a b*,k9zaidmpvx- n ++c gw-;kxlong an equipotential surfaced--v+wkn9cma, ix+z gk;bp x*.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface m3b-z6tso kbz su kk-- 1)yf2afust 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 cc 4c+5bqa+b4bh(jz noharge equal to that on the electron as a result ofn j+bc4q 5bao4ch(zb + 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 .+b yn bbo9ocjx, ;gz;a 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 corresponds toq1n2) h5okg kop1; ryy

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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 distaf31:j hoeyh:psm3lq1n yuey519a9wknce of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point c k:3 nh:qao y15pee j91ml1uyw93 sfhyharge?

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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 dttj8 t +nlz1j;wv8t;gistance of 2.0 m from a negative point charge is -100 V. What is the 8gl tjv1z+;w ;tn8ttj 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 3.094/j:p co4bewfcty:g r ;/qsy V when a charge of +Q is located at one of the square's corners. What is the absolute potent4c :tfy/rg9 sw4: qjpeo;cyb /ial 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 ml9py6pvpr(2ho:1 f nat the center of a square is 3.0 V when a charge of +Q is lohpvlfp1p rnm2 o(y:96cated 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 charli4mut go8f :s,z+.xxz 1hb p/ges 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 voltfah61wd9 w6 65 o x gzpc6j.vt17zvcht is 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 *k 7)( g3b1rexpfehpqevery respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, tb 7gp fqh(r)xee1*3kphe 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 w7ma2efqg:ss x/2/a7fzci0 yee (,si capacitance of C. If the area of the plates is doubled and the d,ymae7sw22fzsi c//( eig a: xfe07qsistance 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 c:ev4jr p ewe65g;y v/removed. The plates are immediately pulled apart. ( ;e cj pvgv/6e4re:w5yWith 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:yuv m7 0mwsflmf;( 3p given capacitor is weakened, the capfmspmw0:u3f;(lyv m7acitance 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 wi 1 l-l:gwf,e5lmrtud2 th constant voltage by a battery as they are pulled a1 r-tldfl gemwul:2 5,part. 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 ar7d.;p7m ;bn m -kkku8po fuhb*e maintained with constant voltage by a battery a*pkm.uk8n;7fbb;m 7-uh okd ps they 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 for adding a 3;udswbv5 rs ;-1gbw-3a rhfrdielectric material between the plates of a capacito;w 5a br-13hdw;bgsv-sfru 3r r.
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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 betwvt * ;eamc5r/mjrv-c3,cj-rjeen the plates of a capacitor. What happens to the capacitance-5mr- v3e; at/ crc,jrjcvj*m?

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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 l+:hpf syn44j the plates of a capacitor holding a fixed char:y4l+pjn 4sh fge. 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 battery and becomes ful jfv 5l ba9r/-4x4 lp/lvz55ph t4bmcvly charged. The capacitor is then disc l hp/545jvl/5rp44a-cxbtzbvm fl v9onnected, 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 constant charge causes theae2x/ rb/2 j wuu)mw2c energy stored in that capacitor t /22awcxubmwe )ur/j2o

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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 the et tw2v.7t;z oqym-lc5v1j2d0uhm6sv nergy stored in that capacito5omh;7 cw.ymdlstv6u0v-qjtt v2 2z1r 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 movm,hfh9x8 y wrbi;q6y )e 10 C of charge from point A to point B. What is the potential difference b9ryhf 8 ;hx,6iq myw)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 q; tg n/o5uyog/*(3rak6lcexpoint A, where the potential is -50 V, to point B, where the pot(g;l/o3xaqcr 6ye n/5ug*o tkential 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, ix6mj g*yb:9r,rw6g trs accelerated through an electric potential difference of 5gy r ,9r*6x6brt:gwjm 00 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, is accelerated through an e;a3bbgb ;/jy fyqt4n/ lectric potential difference of 500 V. Whg /q;aj3bb nb4y/y f;tat is the 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 fallsc /wf(0z-m)dtwe )g j4vlm-z d through a potential difference of 1200 V. What speed doezld(cg )w-0zjdew m/- 4m)vt fs 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 ins 6r3, qqqqtbe+/tsqpoz*m0x au+x 4. 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 of 57ymp oa 4ueag2-y 51tz00 V. Whatt2yp z4uo1ma7y5 e ag- is the 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 20hf;wxm*2fduv zd u8 l*-.,lgj mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving2*8xl-wfj*hlu uzfm;gdv ,d. 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 electricag/hwt s;i1 z1c9vh/od 9 buez.l potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the p; bi. / dou geh1zz9vc9s/1twhlates?

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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;uo)94rte ji y a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, 9;oyrti 4)juewhat 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 Nuit4 /-sm id3e/C directed toward the east. If the voltage measured relative to ground at a git diu-/ie43m sven 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 direction ob ;nrnpy5k/a* f an electric field of magnitude 3.0 V/m. What is the change i ;yr/5*pb knann 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-s3fs mft,o.q0c +k(qg 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 m from the positive plate, what is the potential difference bcs3t(fsf g q+k o,.0qmetween 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 cowu5(md km)ad)nnected 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 )wumdm )ad5(kenergy 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 connecuw ke u8)g85 m *1:x*gyszlulqted to a 12-V battery. An electron released from restezl*yguw xlq *8ks:5 8guu m1) 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 electria5uc; u; l*25m/mv2* hixm30 w.dwpriep ukfhc field of 50 N/C directed toward the east. If the voltage measured relative to ground at a;;*m km2i f 5ucvmpwl/hu5hu*3wa. 0p2xeird 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 N/C di2am tjp ::h3bkrected 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 point 1.0 m direckhj m2p: 3ta:btly 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 15abq l..uu(re2 V, it will acquire a kinetic energy (in the absence of fe a5.(quublr .riction) 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 .ih k.nsxjeis4e*gu*/ q, 1uf 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 ends of a meter sw;p:y*yeqh ; gy6q )nhtick. Find the electrical potential for the center of the meter stick.; yhp hn)q;6yewy*q g:

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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.hj b:g; jnm;e60 m, 0). If the potential is taken to be zero at infinity, what is ;: je;6 gbmhjnthe 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-nw: s* w0zwm,df3cgfpk6 p.7rnC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at point (0, 4.0 zrwfmfp g3:c7 d*ksw ,.p wn60m)?

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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-nsqoa7t0a6o 7rjn 1 m;bC charge is at (3.0 m, 0). If the potential is taken tb0t;7aa6 oms71 o nrjqo 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 c3m4(gswz 7nj x+xp/as1mq g*0. faxhfharge +q are placed at the corners 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, and b mfq z j7 xp3sng/.hxa 0g*(+4maswxf1 = 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 diagonally onpigp a-zmlj*0 x 3yx+,87vb5hk1qh bpposite corners. In the other two corners are placed charges of +3.0 mC and0hy+,zb -3*n1v7gk 5bpa8hqpxl xmj i -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 (chiyyb ;rkk 3ik8v9.cs) arge +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 three charges, each of 2.0 mC, at the coy+h-d+iw1m9 ldwr2 qgrners of an equilateral h1ri m+y+9w dd2ql-wgtriangle 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 capacitocjau slxsh m/z:9h(( )r when it is charged to 100 V?alhuzx hs smc(9)/:( j

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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 ofzsrzxg (,6j(jk28;r ;jqy m xk 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 6sck 6o.ni 3jvis filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the pl6 k 63sjcv.inoate 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 plwag4ccu+63;y hdut2n0bj 0a jates 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 (uyrkg) y nv.*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 b*nuy rg v(ky.)etween 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 bm;2y-lh :lqcbattery. 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 remained connected d:bhy ;-cm l2qluring 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 placedmj:d m+183 cz slnugh+ on a 15 mF capacitor. How much energy is stored in the capacit+gju:+1mlnz cs8 md3 hor?

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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 energy stored in thw4 ssf54p1 mwxe capacitor? x45p1w4wm ssf

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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 cad0nfsv:n aj 7y+a s8)n 3dqi.onnected to a 12.0-V battery. How much work was dd3n:dj07v na .y ns sf+a8a)iqone 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 inr3dji- nu4p1 f7c*o et 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 platleam/jq3y d gqi/i 0+)es 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 oa72nm g9)iulu 2n)vkpng. v;yf 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 capacib v5p ayu2fb:c94of1btor 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 capacito.7cffbssu+7 hr 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 construdpq: 0o/5 wsfsk (yp*ycted 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. Tkzyd41 q 1l;fp)ev3ap he battery is removed and a slab of dp3plv1 4yk zf d1q;)aeielectric 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 acji1g .aowx76nd 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 voltage across the capacitor's plates gix1co6.7j w aafter the slab is inserted?

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