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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 a va8 8n v+a ozxp k0i3rn*r7z7vpector?

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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 azg- +whgkxffdg 4/v 6(b l-6vi

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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 z,8;pf6r nv(p pdmg8 hq xzz-hu(.0kdfrom their surroundings. Object A h ( p-8dv(zmkz;hpngu .rzd,6h08qxf pas 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 direct02 s3b-mqq.xgn;wboanp c8j, /1msblion 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 a3tvo1z1v-)h5k6h plpy 7in ao 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 a hollows.nb 3u;9 mgl/tbf8ui: g gph6*xz 4vi 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 accelerate,;xvgq( xyg,zjx,t0h8z s y8ud from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the net,xqgv0syy,j 8z(;hg8, xu xzw 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 same potentiane92pd 6ixp0 dl 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 pou,*jp-harma 8o sy ,.jint A to point B along an equipotential surfacrapy u,m.sa-jjoh*8 , e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfe+kjovacmf 118dwi )2ace 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 gt/m /quwyv.9a particle carrying a charge equal to that on the electron as a result of moving through a potential difference of one/ qtyw.gm 9/uv 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 3 l wsrb wgpjny39:7(uunit 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 correg*eq6:/auu xa9ddfk- sponds to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potenti-ly(x v4wq z+q0 mcr(;set k9oal at a distance of 2.0 m from a positive point charge is 100 e4t; zwc+ (xlq9rk(y-qo0mv s V. What is the absolute potential 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 ch m 3camynq5z0.arge is -100 V. What is the absolute potential 4.0 m away from the same point charge?.qamy mc5 nz03

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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 cer)w)9gskv6 0ighahd64t l dz5 nter of a square is 3.0 V when a charge of +Q is lo6 ads)kvwd0it z9)h5g4l rg6hcated 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 ohus ,:;wms: : c:ouxpzf a square is 3.0 V when a charge of +Q is located at oo,p:xh m:zu w:scus :;ne 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 chargc tbp cwn1v0(:2j(t j3onu2ti es 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 i mkcfny ou6k0;h ;:4mf)lgo)n4 (dneqs 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 respe5(x7 necbxb3t8 ;wk dcct except that one has twice the plate area of the other. If the smallexx5b n3 te7dk(;w8 ccbr 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 the platz xq;*tdm+-tt es is doubled and the distance between the plates is halved, what is the new capacitanc-+t ;*zxtt mdqe?

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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 cac.co+cv o88(9o yixsr pacitor fully and then is removed. The platx.rcv +yc8s(oc 8oo9ies 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 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 between1 hkmvmc7osoo,b4i *4 the plates of a given capacitor is weakened, the capacitance of that capacito s4hv7ibm1m ooo, c4*kr

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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 ph63 2a ew6ek-rdv zs i x-d4u5,j6lnnconstant voltage by a battery as they are pulled apart. During txeja-26rdzd,hkn65-vs 3 l up46wnei his 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 atordv 6f3ck9 it2k)r;re maintained with constant voltage by a battery as thtrtk9i r2)o 63;kd vfcey 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 betwe6:nc*gk6.ngz7 obg pf en the plates of a capapk.g :fgb*on6 6nz7 gccitor.
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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 plates of a capacit ,i8h*m +r .r - j4bl/kgegxu:f/ofc kz-oz4vlor. What hah uef fl+ -,k/icr -g4z/8lb.z*m4 k:ox rgvojppens 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 as paper is pla bqpp2c8t6e5 gns/z,x. i4cm9 qedo6sced between the plates of a capacitor holdin65e bq/ zgc,oe pd29 cspmxit4s6n q.8g 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 is connected 3ya pvpu7a+iz* uok l 4 o/+w:srpm-,bqubb+(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 capac3 b+: 7* b pa qu++4oypmo,ulkwv siabrp(-zu/itor 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 am;bi61b r5i zc constant charge causes the energy stored in that i1bc6b i5r zm;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 across a given caddhr0*al-3 i;lzsd x;pacitor causes the energy stored in that capaci*d0la ;r;d xh-s3d ziltor 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 charge from point A t *npvoyd80 aqgalh5iq) )q )t+o point B. What is the potential difference v*qahg ptilq)n05qd ya8)o +)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 pslp. ls;wpy t+kays /vrf ,(5*oint A, where the potential is -50 V, to point B, whervs 5yf/tl(l;wa*, s spyr+p.ke 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 accelerate/ j(wc gzpar/qyg;8 g6d through an electric potential difference of 500 V. What is the kinetic enea6 gg;rj8(zg/ywq p/ crgy 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 differe5+,zkus5 r ouence of 500 V. What is the speed ofk+z,suru55eo 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 difference 3aa7q1.v 6zcpf+pjq yof 1200 V. What speed 7.q1vzf j3+yqc a6app 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 in moving ;e)m pwx,,- p dsbec.s$8.5 \times 10^{18} \; electrons$?

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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 p 9/6d ag38 bcc/krkjchotential difference of 500 V. What cg9dc r 6/ak/k8 cbh3jis 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 20 mC. Thwz:u3ml92gbva b2:qp e object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential difm9vpw:32 q bgl2:zuabference?

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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 thekt5 t-mc -h2gd electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric fitth-52 d mck-geld 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 ma f mqajb )2+jww;aqx+)gnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is)j +2aaqjwfq)xw+;m b 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 tl i39ne8hf.+h vlymg -ulrq- 6he east. If the voltage measured relative to ground at a given point is 80 V, what is the vol.h3 lhu l-98en-iyf +qmgv6lrtage 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 e0v- /k slzl**e rc/gfclectric field of magnitude 3.0 V/m. What is the change in kinetic energzge 0 c v**lcs//k-rlfy 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 e-ot o eve(9l3gq9hr h0+.qmr0.20 m, are connected to a 12-V battery. An electron released from rest at o9qh+h 0lereo.q3v9m( r-egt 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 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, separ2rd6mqk 9d/ij ated 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 at a distance 0.050 m from the positive plate, how much kinetic energy does th9q2km6jdr d/i e 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 connected to a mgzxtg)+0up z4e- fj0 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When ggmxz0+eutj0-) pz f 4the 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 directn0pfv9e(z8 a +up/ yfaed toward the east. If the voltage measured relative to ground at a given point in the field a +p ez8fynfau/ (09pvis 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 directed towardwy d nvh-ix: -zgy4p): 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 po:--y4g): yix zhdvwnp int 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 throughe; ki/+ez- 2,l nvgwzd rfj*x5 a potential difference of 12 V, it will acquire a kinetic er*le i;+z5-z gfvx k2ewn/dj ,nergy (in 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 diski/ p9wkys;rxvyc 29y06g nnem( 3v:atance 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 stick. Find thdpm,w7 . zrfy d-g4)(l drr5sce electrical potential ford).fc(l,mrd5zdspwy -7r 4gr the center 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) anz(er61 o 0jebvd a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4.0 6bv(re0 oj1 zem)?

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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). e r:nod7(bn) x6see7cIf the potential is taken to be zero at infend b67o7ern)ex(s:cinity, 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)k,wmi eh qfmt4v(k( 14 and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a mf k kqw(,1iv (4htem41.0-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 corne wksb64tr(7eso x3 ex;rs of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a o6krtes;3ebxw4 sx ( 7= 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 diagonally orfqhbu r15/bzx m.1w(pposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. Wfbwr /r(mqb.5zx1 uh1hat 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 (cs3gjh(vbc v-2abs qgy n4gq3b.eb ./0 harge +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, w *x/uf kb50caeach of 2.0 mC, at the corners of an eqfb0*/auk5w xcuilateral 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 it sw+bdnm 177shx ),em/k)y dumhv1 *fgis charged to 100 hdw, n/ g v)fy7sdmx +7e1 mhubsk1m)*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 areyj3 oh m(hkum8 i230hxtm/-s q0qw6v xx0f1hra $0.50 \; m^{2}$ 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, pimu , 7sy4p7uq9gqj( and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, wha7gpq9 qym4( u,7pi usjt 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 aunei3 u0nl*. je s/y3grea $0.20 \; m^{2}$ 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 capacjq 7jux7ezt*8;(icq z( wdk,zitor 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 between t8(qu;jz,izcd* k(tqx j7w7 ezhe 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 br z9 :khhxv, z-84uttf08cmahattery fully charges the capacitor, the capack9hht umtv8a4c8xzhz,:r 0- fitor 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 placed on a w:,bav-r,d y;e d8x uz15 mF capacitor. How much energy is stored in the capacitx edz b,-au8d ,vy;w:ror?

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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 theu;oua)bs gj 66 ax*scn /cxbplk5j)ks7--c b: energy stored in the capacitor?kj sj-sa7 )c-; *)b6 kxba c5p/xgu6n:ulosb c

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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 q:xym wia rw1 w7mfz+krw6y( i26d.*jconnected to a 1 fimidz w waq mw6*yyrk:(7rx1 j+w.622.0-V 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 charged u1 sw)o+s(sjqso 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 g-se7 -ffkcqcjbe*) 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 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 plates8-kz6 vth wvamx/7u*a 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 4(y aj (ckhda(;:mebb $1.5 \times 10^{-4} \; m^{2}$ 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 construct o0k18t fc tkji 3ji7,a1omim 8torlkwya*9+5ed 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 constr eo ; e,k:zg. 42trsm0j1i, nwlkg/mgeucted 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 baq- yw7sb (2kc;kkj tf7ttery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the pck;- btyj 7f7w(q2ksk lates 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 becf kb/v l b;yy;9k)aw edzo-2f-omes fully charged. The battery is removed and a slab of dielectric that completely fizabl/ )2 fdo9; ;vebwfky-yk -lls 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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