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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 c)5,ri na anyuw8kq dep17e- mwsy)z71l7u7r 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 coulombm dn;2 yhs;w1*+cxl0cua) qpb 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 arlukz:*k fkvvqki( m -)q5bx(9e insulated from their surroundings. Object A has a net charge of excess electrons. Object B is gvb)kik*f5kqvqk (:zu -l(m9xrounded. 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 directiopu-+j;wn/i a9 xid3gn n 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 immsw (n8 ;h;k/djch 9to 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 conxoaxz)n+ -b hi i5ku14z0:fiuducting 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 o5 /.cgyd pf,vto a speed v by a 500 V potential difference. If the potential difference is changed to 2000/cdvg , fopy5. 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 alx+;qv1wfkz i )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 point A to point B along ao e4:h1csyi0fn equipotential surfac1fc iehy o0s4:e.

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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 bel, m;-rf *an5u6xft ir

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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 c 2z rno6y+7iyculsb+*ae q2ez ior68* harge equal to that on the electron as a result of moving tilz*y2c+qes+ on eo7 6ya2rib 8zr*u6 hrough 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 unif09 / e6n .t:gzewvnlwt 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 corre+ kzfl(fud0 q7sponds 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 positive point 4,d7 hatl+ w,q acfhmkfl* ,9mcharge is 100 V. Whata,m,9l*aqh+tlh df w7kfc 4 m, 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 n;s z6ro0x 4:bsum2 d) k.zdx)icnsk(kegative point charge is -100 V. kkox 2 )(z4 s:n;sm)ku d .rdcz6xbsi0What 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 o(+: .ar/5qh ksa( jxqf5 wa6yvwexk :if a square is 3.0 V when a charge of +Q is located at one of the squxrq5w yexj+(hvqf k ia / a6(:sk:aw5.are'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 potentiaat9 (+j xegv xf4tf(u1l at 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 the absolute potential at the square's centerx9 eja+u( tg1(fv ft4x 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 lkz73/hnn9p kc t* *awof 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 ise lr +t6(b8fat6gzx3h d1nu -qwcp.0r 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 thasqg( f6 4m v0g ae+8o0ipufnn2t one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one vo042aef(pnsm6fg8u gn i0q +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 areal xvpp z-r)2;hbc/io: of the plates is doubled and the distance between the plates is halved, what is the new capacii)z oc v;-px lphb/2r:tance?

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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 thenu qk)*,pqd3cj- - yvak is removed. The plates are immediately pul* qd acj p-,ukyq-vk)3led 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 between the plates of a given capacitor is weakened, the 40drvptbq.w- capacitance of that cb0d.tr q-pv4 wapacitor

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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 paralle .(3h0 mdkl( q)iycmzfl-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of cq30 k(i.)lz d(fm ycmhharge 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-plq.0 ltypp(x/khmdsc0 .vt 2w(ate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric vq/hw0m.x(cdpylp2.(t k0 s t 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 the qzp4**l)lfzwti,c; 25ec e;a9ureor plates of a capacito,tec 4i9r;f * l epc;qo*2e5uw azlrz)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 between thu0z,n8f8gjco pu; (dke plates of a capacitor. What happens to the capacitancf80 zp(nk ugu,jco8 ;de?

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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 the plates of a capab3ouxn pmes+ g swm p5j1y0z(/ 8a57cjcitor holding a fixed charge. What happens to the electric wj 5pe(7 05mpu +b 3zsnaomx jy/81gcsfield 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 becomess2j16 r0tcxyhe7gv+(h /mda t fully charged. The capacit(met0x6t7v gc /rsy+h daj h12or 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 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 cons2sp-azl 8g8mqtant charge causes the energ8qmls-ga2 8pz y stored 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 across a given capacitor causeswe6h klf e/1k6 the energy stored in that capfh 6lkk/1w6ee acitor 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 charg 9rl:;2nv aqo6tk*liae from point A to point B. What is the potential differenoi : lkq* t6;rlava2n9ce 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 eleya 9:z,n(kgks6w ld 8mctron from point A, where the potential is -50 V, to point B, where the potential( zls:mdn8gay69 wkk, 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 an elet1*6ztjc/chp 8 hb*pr)2 jibft;k h) ectric potential difference of 500 V. What is the kinetic energt c8zh);fkcbp*bt tjh6r hj1/) *e2ipy 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 elect- ewnbu:44 bw)fakk2w ric potential difference of 500 V. What is the speed ek2-4f4 )kabn: wubw wof 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 poten3f/;oz djg9ip tial difference of 1200 V. Wh9i;fzoj3p/dg at speed 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 -yj tf3:yl3el vbm6:xdo in 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 dif;0*kx mbzmswb+3b3 se ference of 500 V. What is the velocity of the electron afterward?3 bm z*kbb;s+3mx0ws e

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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 objezm f6u 4tl2hy3ct 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 diffe4zyhul6m 2ft3rence?

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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 e2 5v2fqcas5 a -2zngnxlectrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the plate5gc5a2-s x f2nqvnza2s?

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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, isgft+rm v,5q 9h1m 0ewp directed parallel to the +x axis. If the potential at x = 5.0 m is 250+vm 5,1gqfwr m eph09t0 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: mmadnh69ijy4m8;xw 7cm. pd east. If the voltage measured relative to ground at a given point is 80 V, what is the voltagi47;cnydxp89d hm m6m am.jw: e 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 dhasluipfbaoc92ktv*,61 ns93 h bu;:irection of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy bsih: u9,th sfb6v2uocka;9 3 1panl*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 + 55 wz:2wps.notpkcb. dfjs812-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 pb5w+wd5 ospkz2sfct j8:.n .p ositive 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 connected to a 12- e kpv,ee yvy7q.j 5iu..7idf.V battery. An electron released from rest a e i..e77jydu,ki.efqv.5 yvpt 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 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 cs nz3o(3e-wax: n2npep- l i,konnected 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 positivex se3e:a (p3winkzn 2-po l-,n 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 towamt0auy,o:y 1 b d;kv4trd the east. If the voltage measured relative to ground at a givt,ky :dmoabtu40 ;1v yen 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 o iu; )w8fb;h ah+qdn1bg6 zm4of 50 N/C directed toward the east. If the voltage measured relative to 6 1b8h nw;ibh d)zo4;qg+u amfground 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 through a potential difference of 12 V, it 5eycgn+bzc-: will acquire a kinetic energy z y5cbce-ng+ :(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 distanceq/.zs 5 m.kecx1gpwd/ 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 :bwbe8kt ; bu,ends of a meter stick. Find the electrical potential for the center ,8w:bku bet b;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 aqm:fz6sv d7 6zbcgsh 4.r,n8 g -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the elrf6gzd746,:gc 8ssv nz qhbm.ectric 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 at (3.0 m, 0i5 1bn b;5lz28inz umw). If the potential is taken to be zero at infinity, what is the 8 i n;wbi5n5z2mzb1ulelectric 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 (jneg0:v-cd 0bedt.n 9 3.0 m, 0). If the potential is taken to be zero at infinity, what isdd.v0 :t-ebng0cej n9 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 plaf)y0brrh( kai9zvjj-5b* qdna(:pe w-1 zp q5 ced 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 q rpe) 9j-wb* 0 i5fhaqz1b5p-j( r: nzdvay(kmC, 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 diagonaq )wzu2u sd,2++b luqz:; wmzolly opposite md)w2,ouz+qul;q zb+ 2 :us wzcorners. 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 (ch kwkl,1w0z p xi,ks33parge +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 ;-g4 (5voxv4lg4p6qw hl hec3v um6mdmC, at the corners of an equilateral triangle o;ol 3l6vp(5u46v cgm wg 4mvdxh-q4hef 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 is charged t7ks 44p fyi6a4g ze,meo 100 Vepif47,4s4 agykmz e 6?

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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 h08mor d3x.ezb as 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 sepavyoyy9u qki k20,/+r orated by 0.050 mm. If the capacitance y290rqk okiv yu,+ /oyis 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 capacitorl-li0gx u*jg r9x :mq0 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 separation of 5.0 cm. If the pot6jdsl *bw f,2nzpr3 z4ential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field betweenflzdn*3j , 64bsz 2rpw 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 aznm9rbj / wufgx5w 69ld:,e:bcross a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additionarfm::nbj gx6, 99/uebz5w d lwl 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 on0kob9 *q nt.mz(ij 2sj a 15 mF capacitor. How much energy is stored in the qtjmj ino.02*(z k9bs 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. What is the energy stored in tky stzeq :iv44-+hrw8he capacitor?y iwt4re -kvq4hz+s8:

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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 w5y ac hig2u+l9hen it is connected to a 12.0-V battery. How much wgyhli59+ 2cuaork 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 so that 4bno,b5ctp7e ptg ;2 oit 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 platjx+u.) 5btt-egh *b pres 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 o9 ,e je:u9amt6xyc vr3f 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 cons + nj*una /+e sh8saubu.y+:suists 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 n3giplh whf xkkq5e--f+-38 cconstructed 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 platrzxm0f+u2l qd nwk.;qt *l-uj ,mo1o *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 battery and b3g; ike)+ jfms7/jc lwecomes fully charged. The battery is removed and a slab of dielectric that compl;fc)ksi e3j+mwj/g 7letely 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 bh ,o7+o )inz ybv1(9drqajk 5xecomes fully charged. The battery is removed and a slab of dkn )5(r7+xo9yqjv,zb hi 1 aodielectric 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 after the slab is inserted?

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