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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: 游客未登录  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 followine5e vgizkdx 4 t;,tu*+g is 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 is*85 )omosb xtd 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 surroundfo48 no 3he5vw sf;+vgings. Object A ho;5gwv8 n3ef4sh vf+oas a net charge of excess electrons. Object 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 the direction of the elecb (a1 jd(z y:feaa,cw/tric 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 directionr)5xjqwv (bkm zxb,oci4u3ac 1g/+z5 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 a hollow conductingr+w+.fjd;*+ rrki 0, rnrophy 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 500v36ah98 nzi psk;ztr 5-hd ju8 V potential diffh t9;j 6 zh8 v8nakspi3urd-z5erence. 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*ig(xg 8kd1n l points are 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*gq(n*tpgv;-vm ) zq n point A to point B along an equipotential surface. nz*(;mgn)q*tvg-q vp

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must beytkgm40 njv, 4eccn2q, d 0tv4

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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 that on the elem4i(ky4wt ux ,mwi;mh ; kh-y6ctron as a result of moving through a potential difference of one volt is referred to as i4,6i m 4kyxuwkt;y;h(wh m-m

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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 ofezc. y0p3ez0b

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresn p) 1h8dj aq3v2bf/c/9cjzw qponds 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 positivekost7b8id zg6oar id;+ z(n+) point charge is 100 V. What is the absolute potentg)zidnztk s68;7 ibod + or(+aial 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 distanhpu+ hj m+c2fsh41h*e w1t :bace of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same p+c2m1 f:1pe4jh bsaht hhw +u*oint 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 the9v (cghm-,na s exact center of a square is 3.0 V when a charge 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 filledmgan,hc-(v9s 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 squarso5gc5 6bq ) qmh0lt;g6uxwj 8e is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potentiqoj) 8cs6qx;6umgwlbt5 hg05 al 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 ozvzehh6 mm:/ c d6if i;0g+19ihgx)phf two 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 -rtnxbv + ne59i29ztta

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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 araoz;1nml/e:z e identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the largerz/1l z:maeo;n 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 plateixc4 bp. ,dzy9ht enq2am+r0ga6u) (ps is doubled and the distance betwmc bg9)4 ap ie qytnh.+6prazd0,xu(2een 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. Thkqab- m9mxd n)* o.,ade plates are immediately 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,m9qmoa xdkbd*a) n-. 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 is wei 5fmf) qibar (h7+r,rakened, the capacitance of that capq+ , r)ahb75f r(mifriacitor

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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 with cozn(o hu+(wa7 p+8eupsnstant voltage by a batt(pa +w(7uho8pes+ uz nery as they are pulled 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 parallyz )kdu1qxd8h -l +)wkel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What hk)w+uld zx8h1q-y)d kappens 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 addiwz ifn7*nl225acmw8 od4 g8cang a dielectric material between the plates of a capaci wnlmf782zdwgca45o 8aic2 n*tor.
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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 paper6e zaliu:w- f/ is placed between the plates of a capacitor. What happens to the capacitanf 6i eawz:/l-uce?

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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 betwee qp*/e-7i 6ynggohj. c5mkq24 w xnl:okefl/.n the plates of a capacitor holhk.kgcfi qo52-yjn6 wll*xe: eo gm/ 4/q7pn.ding a 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 s(ne15l ypa:mis 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 that no charge leaks off. The energy stored in this cl m15:nsypa(eapacitor 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 xb6u +6kp 0bq4kxmhk .0,ay/sb.q sln of a capacitor holding a constant charge causes the energy stored in that capacitoqkh0.. a/4kxl 6 qbm6p0, bukb+xsynsr 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 the energy stor3j948+p .vzzmjf3ztp8/2saumq1 eejb ic. s ded in that capacitor to+fiaq p3dp s 8tzzze.b9m4em 28 j.v3scuj1/j

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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 energ7 wshui )cnrm bul b4;6:w8hs7y to move 10 C of charge from point A to point B. What is the potential difference betweeni6;4cnuw b hl8u w)s:7sm7r hb 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 moxz t7cs+e/ ukdm:1a j0ving an electron from point A, where the potential is -50 V, to point B, where the e0xa+m d:1z7ck u/tsj 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 throu1ttn dp7ldul-4)y4 wjr*tg6 wgh an electric potential differencuw4)7ltp1 nrd 4dtyl- jwg6t* e 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, is accelerated throv-/kj)v9tgvn3k0 kq ij/n3n mugh an electric potential difference of 500 V. What is the kv309)vtg v3nnjj/kkn /m- iqspeed 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 throug;8)r6wqgr o1 ;shsahvq4 mw 3dh a potential difference of 1200 V. What speed does )ra3qh hmowsr6 4d8wv; g;qs1it 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 movi+j glr2rv :s4k(8xar pwkgm/dcc8 3o) ng $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electro7+t yoy4wdmnk b qwcxs7/emh)2*ap 7/ n is accelerated through a potential difference of 500 V. What is the velocity of the electron afterwwn4x med 7*/thpsa+ymoq/ yk 27c)7wb ard?

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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 obqhsiyn/ b 4 ov7ppbr,n y,.b0m2d-;bqject is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude oihynb o0vqnd;p s2qb4pb . bm7r-,,/yf 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 electrical po+fdw.uoq:x r *tential difference between two parallel metal plates separated by 1.0 mm. What is the ele rxq:du f+.*woctric 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, is directed paralgoyo e0 y;p6(6jt gwy3lel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0 y3;wp(oo0yt6 j yegg6m?

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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 sjghf )6,8n,nih xc n;the east. If the voltage measured relative to ground at a given point is 8if8 jx6)n gn,s,cnhh; 0 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 of an electric field of magnsmze rg 6;2lwbu e74l)itude 3.0 V/m. What is the change in kinetic energy of the proton?e67l4 ) ;wusz eglbm2r

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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 battes8 t n**uac7lary. An electron released from rest at a location 0.10 m from the nega7* al*tasu8 nctive 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 07irvec*:s0dl*g7 fy q.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 at a distance 0.050 m from the:** 0cqvre7l7 sdgyfi 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 9;idba de 32lzby 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 at a distance 0.050 m from the positive plate, wl23b;i9 dzaedhat 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 th )2uqp kz8dgkw/twm7 :e east. If the voltage measured relative t 8zw:m2/k tpugqk)d 7wo 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 electriypq/ r;c3kntn 9oee1 1c field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, whpyno/; ktne1 3 1qce9rat 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 acquire a01 ,jg b-mtiat kinetic energy (in the absence of f0b,mt1 a-gtj iriction) 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 distancezt(8(g vf. g /wag1cnb 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 mek8t te+e.fuf(ter stick. Find the electrical potential for the center of the meter stif.ft(ek +8uet ck.

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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 (3.0x/amzwg;(j( a m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0,jm; ga ((/wzxa 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 charge is at (3.0 m, 0). If the poteztc*cbj3 . bvc):bw+ lntial is taken to be zero at infinity, what is the electric potential energy of a3)lj.t: zbcb cc*vb+ w 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 cha0n4+xt:k0otjy ip *otrge 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 from infinity to point (0, 4.0 i on :op+x*40kj0 ytttm)?

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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 char t q(t7ta(wzf9ge +q are placed at the corners of a rectangle of sides a and b. What is the pote tz(7ta(t q9fwntial 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 twifkz237 p7fk8fdnhtf mu 18dyu2j1 v +o diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and - 1t 2iyffh2 kkm8 pnd+13uuv78jd7ffz3.0 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, mass)*; 9bf:junp sxq8d b-wyi(hn $6.64 \times 10^{-27} \; kg$) 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, ea w2)u 3(h ;s(c,svix gds5fdkach of 2.0 mC, at the corners of an e; ai(v2 uscf,k(hsd)g35x s wdquilateral 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 ofc)xl rw4 4y*t*wwb8gqgos: 0q a 2.0-mF capacitor when it is charged to 10y0rlx4* ogq:*wtb qwsg)wc 840 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 yd (k3wj, iswl*i+ 7zgq)dwf -has 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 the plates are separated kgs-yl(3+ ,kjik4 w oz7:noecby 0.050 mm. o4:iy-,n7ego ls+j 3kkz kwc( 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 capa ovzhii;5 c 74;2dk2d pyu)yxycitor 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 capacitor has a plate sepp.i 1sf8le k+zaration of 5.0 cm. If the potential difference between the plates is 2000 V, wit. 8eszkflp+i1 h the top plate at the higher potential, what is the electric 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 connected across a 100-V battery. After the v f8nwv :uo*3 cp94fdc/sxl spum5;x7 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 p/md4 v5x* xsfl;3s v:9cp7ouc8 nwufuring 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 oz*w d9yqu +ua ikrlw4(,c ,o/70ddifqn a 15 mF capacitor. How much energy is stored in the capad dyq/( 0z aq+k,fcio79u* wlr d4,wiucitor?

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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 t cs 0ho(anz ruen;sx+,b:,d;the capacito ,ohu;rz;( :sn td0eanx+c b,sr?

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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(kq/i6bb sv*rw dzie,h8ji -x.mkk8, it is connected to a 12.0-V battery. How much work was done in charging this capack*x8-s 6ji,/bq bizrwh(imk, e .v8kditor?

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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 stxl ax3p 9cw*s6ores $2.0 \times 10^{-3} \; J$ 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 plp4brstm (9 3a zpmd/(nk*)t hdates 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 of ax2zckvrw r;7h *6b3 rwrea $1.5 \times 10^{-4} \; m^{2}$ 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 :: 3wl:q nppksevb3 /dof 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 constru9:kxg.f )jef9 7bhzo kwjit2 /cted 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 constructzb 1 sc,*8bocted 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. Tnat4xzg )0i: fhe battery is removed and a slab of dielectric:)0itxg 4af zn 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 and becomes fully charged.k61uc -xuiu ,i(*sgbv 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 1vus(c,- xk big6 i*uuafter the slab is inserted?

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