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习题练习:Physics Unit17: Electric Potential



 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 a /-6fzp jdbu;ml i):jfkvtf 7xn2q/q 7vector?

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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* qr t5p/8gagu5a k(dv 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. p:p fkftds620v5ofp their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which obvofsd p0f p2f6t:5k.pject 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 ib ( 4 f5,bq8rdajxrb nj62/cewn the 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 -c .m.*iix9u+ jj zvc(-a ,mguc wszd0to 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 conducting sphere. Th eaw d;n4dn,n;cv0+6m cm;vvfey

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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 r1ivs* (1awvdv by a 500 V potential difference. If the potential difference is changed to 2000 V, 1* i avvs(rdw1what 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 at the samvufi ,/5c1zjngue c 89e 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 poixt 3+i4ze:onw nt B along an equipotential surface:to+x4eiw z3n.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfac;capnxq-0g wi ;;-eu8g( fm yve 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 charge equal to t,v q(g/evjg2) 5l2gjmy2f jsrhat on the electron as a result of moj2/,frqml j5evg2) (vy2 sgg jving 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 a unit orgf2q0c e( ye2w *l-f6qf9 bsgf

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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 tturrcq9a+3 e i.e8wu.o

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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 posjq a-kr,xi ij*/(6. 1uprwkbyitive point charge is 100 V. What is the absolute potenti*py j(ri1/wbjaxk.-kui q6 ,ral 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 distance of 2.0 m from a negative point cha. mnn9wi9vuj+nwe+ar w48 4ie rge is -100 V. Whatn4mi. 9w9iwner4un eva j8 w++ 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 wv 0d-ytfb pi,bc1at 4c/r:f s9hen a charge of +Q is located at one of the square's corner yivd ab40t,fpc91 r/b:tsf-cs. 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 V when a charge of +nymy*8jcdw.(k1 xa9 bQ is located at one of the sdn8(b9xk j *a1.ymwyc quare'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 gc eg8l mpbio4kg1f cl9qfd.0117 z:tthat 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 ia.8nz; d kwe/;y5qu x)ipn6kug7b 8d ds 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 ex7 v 3es:qe:t7mfas.nxo;j4lf zc2g 0zcept that one has twice the plate area of the othegf: ef7;n:lsc7set0aq3z4xoz.2vmjr. If the smaller capacitor has capacitance 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 /qx:j8vq r 1xmjc g;p0(ng m;dthe plates is doubled and the distance between the plates is halved, what is the new g:vp /(8jr d ;j;x0g1mc xqmqncapacitance?

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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.:p hnjsx-33xip c -qxqy;flz/fm 7n/ 1 The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) lqq37psi-xhc / ;xfxm3nfy p1n -/:zj 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 po l3e0ppm/4sgiven capacitor is weakened, the capacitanc3p/ps4pemo 0le 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 w wcm17j 2vvmfwoep13w .k ;7rmaintained with constant voltage by a battery as they are pulled apart. During this process, the amowj1verfmv1.7c73 ;k2wwp mwount 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 conm0tbqe :wvasq x 5.8go:elo0 8stant voltage by aa8ls 5q: x0btegeo:m owq.08v battery as 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 dielectric material between+l*s)txeam20k ef edl5cqf s/*( wk r( the plates of a capacitoclq t) de5e( ffkr s*(+xske/*la0wm2r.
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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 plateae 26 atk9ujl8 sev59js of a capacitor. What happe jkt 5u6 leva2sa989jens to the capacitance?

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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 91z3nwo uz lh5as paper is placed between the plates of a capacitor holding a fixed charge. 31 owulh59nzz 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 toqalsy t21 p,-y 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-y,ply2a 1t qs 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 th/c hy/k 4rub:m8kr ,8rswcn;+z lxap7e energy stored in r7ak r:huwsz;mx/+4 l88 nbkcpcr, /ythat 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 acru p *-wi) 3/iexmwb/vaj0 ym(loss a given capacitor causes the energy stored in that capacitor tov0ybmw/ l3*xjuii/ awpm (-e)

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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 charge from point A to poin)b ccu8;yng +gw0g3x7ywwl (nt B. What is the potential difference b08gw+ nyx g 7;n)cbgwy(3uclwetween 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 potenha8 j18n,ut )8x* tylgb a)jtvtial is -50 V, to point B, where the potential is +50 V, l8v81) gjta,utb*y8 jn)hxtais

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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 resr-nv40 *ac uddt, is accelerated through an electric potential difference of 500 V. What is the kinetic energy of crad 4u*nd v0-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 d 4,9im8x dxlk -qgx oa,3zkb/m8cac6hifference of 500 V. What is the speed of the prc4 -q8d z,9gb6mlak,a m3kx8ch/ix ox oton?

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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 difference of 1200 )gda(e1a svxb: 5 ht99s9 jwyqV. What speed doessdx91t)hg (: yjqwe5 9baa v9s 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 in muu3t rz/ f4sg-oving $8.5 \times 10^{18} \; electrons$?

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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 dif: ;w)x:yxylxq ku4n3 nfd db+7ference of 500 V. What is the velocity of tdky3bfx47:q;nn y ) x:l+dx uwhe 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 objectckl 54r3v-il t is accelerated from rest through a potential diffvl4 c k-3ltr5ierence, and afterward the ball is moving 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 electrical potential dmo 13- yp668 fixnvuikifference between two parallel metal plates separated by 1.0 mm. What is the electric field betwp u6 13mf6vxiok 8-niyeen 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 ma+- z.6uyeq3ljo 8df gbgnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 25qgj o8 6u+eyb. -ld3fz00 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 east. If the:z3z;ig:ns ml4ali q 9 voltage measured relative to ground at a given poinglz; iia:lsnq3m 4 z9:t 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 along3. mt)o nl9qmq the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetio. qnq mm3t)9lc 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 kz )/qknd ,0 dflcxu0rzgim3j5ah5.+/fd. f ba 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 m from the positive plate, w)+ d ,5h5zfmqrdjxl u. ndzki3kgafb0c/.0/fhat 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 connected to a ir;,nh7 j4pfbkgwss0 z 3odox2wj7:/i-oi9o 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. Whens-ikrwbowh fn7 0d j4,/o3i2g:zoio x; 9sp7j the electron arrives at a distance 0.050 m from 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, separated by 0.20 m, /gd x k9p j-9ss4:othqare 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, what is the speed of the electts9qjp okd4ghs 9-x:/ron?

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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 dire l fhfc1/wsuxic u/e :7s+s:*rcted toward the east. If the voltage measured relatil ers/u*:c: i7wsfu +/s c1xfhve 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 +ufpv(qs5wytw 0*s-1 st q(zi field of 50 N/C directed toward the east. If the voltage measyq(5 st-1 u0zwvqwi(*stfp s+ured relative to ground 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 thr ,y1gb,48ir7sb1ibluqpg- wh ough a potential difference of 12 V, it will acquire a kinetic energy (i y8b,gp 1- hwgiq 7r1s4ibulb,n 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 a dist7dnh*s s88au *msbx7 jance 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 ej b91uj51bcl(q psdx+p0ad 4are at the ends of a meter stick. Find the electrical potential for the center xb 0aseb 4+1c1pq dlj(du95pjof 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 -pu8 ups 9v1(mh2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero 9vu(mh81 up psat 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 a -2.0-nC charge is)j2 mmzi p6/th)qy 4jn at (3.0 m, 0). If the pote zp4m) qm/nhi)y2jjt6 ntial is taken 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 (3.0 m, 8qkxul s/d gf25mxtl4/8-vsn,7ez j p0). If the potential is taken to be zero at infinity, 7x2p fev5m84j/z,s 8udtlgl s-x /nkqwhat 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 corners of a rectfl3-,tlf gk3f ) iwbg7angle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, 3 wgkflb-3gfli)f,7t 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 ;ix;3hen05hks+ gem4ajf b,emC are placed in two diagonally opposite,ee +mefa4b 5hj;;gx isk03 hn corners. In 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, d/lf 5i pv(z mrk88q8 m 4r/:cys7letzmass $6.64 \times 10^{-27} \; kg$) 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 thd2)h 1/. psgi (ojbdhwree charges, each of 2.0 mC, at the corners of an equilp2hodw) 1j.hsg( /dbiateral 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 ii gwe:.13egt qt is charged to 100 V? qgt weig13:.e

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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 plates4y;k rq n *f7xac77m3on1-d4ykkefiw 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, andxe 7 o5pp28coa the plates are separated by 0.050 mm. If the o eppc27x5a8o 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 z)lr4 bcma82tm0b1q i 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. If the potaiks ( bka1m)2y: 6wxtential difference between the plates is (ka6 bikmastwyx2 1):2000 V, with 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 ba1 kg:/s)j ciaottery fully charges the capacitor, the /csg kaj)o:1i capacitor is immersed in transformer 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 plage)dhx2m;vuez 94 nj 8ced on a 15 mF capacitor. How much energy is stored in tj8;9 z mv2eu hne)gx4dhe 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 capacitor. Whktlfokd.ccpw2 yb01e4h koi5 or4cz4 v9-:j2at is the energy stored in the capacitoi1k -2zcbjdwk c:tplch4 4ev95y0k.rf4 o2 oor?

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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 plat8-4edr c0u 0-sals+mw gx0cghes of a capacitor when it is connected to a 12.0-V battery. Hgchsx4-del-uwg 80a+m0scr 0ow 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 charged2ge2b q ij45xe 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 area t/1g h ,ar.xzj$1.5 \times 10^{-4} \; m^{2}$ 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 plf *fk; f:k3b 2wa.qhkpates 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 of area -y tfw hu,,,nk$1.5 \times 10^{-4} \; m^{2}$ 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 constmx x1)n*9yi8usl uj+r ructed 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 capaci g55f pxs5mlb6*7sq actor 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 gz f-kf+ce.dx1.8 c(sgmkib+ and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is gcz-cge (fi+ .m dfk1bxks8.+ 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 batt+kqxe pgf5n4; auqp9+ery and becomes fully charged. The battery is removed and a slab of dielectric that comn5 gqe k9p4qupxfa+; +pletely 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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