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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 vector:4) pibl5gstmc0 62n uf 3ylfd?

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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+tvqei19 .fomrprj3 o;rm4 1b 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 hth/ ov2m:f-:gx0 1zhpcvv(xxt 2utw a i6+t5objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is groundev:2zt0 xxug:t v -htf2+o 51xmwpcth(vh/6ai d. 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 electricz1;j7bbmumd( 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 elm,h0(dkv gi/cxhq. uck /w. y1ectric 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 pl/h -3cav7m uxbaced 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 accelerated fria mksk: *0ja)om rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed j k)km: 0saa*iof 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 potential is referred to af/i5asi2 kbz8 c:u yytaw( q80s

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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 an equipotential so 2e5-ebwg8sn38 xwvxurfacew 8v 2gw5x-n eo8xe3sb.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface 3f,dc yz7 vqs2 mfw/o(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+lx9zpajy+of*9q0 n i a particle carrying a charge equal to that on the electron as a result of moving through a potenti oaj0 9*+z+ynx9fpqi lal 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 ofar sxb2j -nb9 +dcjf(f-,jn *y

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspo+tbv;.6td zpiy8:/ d f rn;ucrnds 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 posith p,5b26 xxjsq-6x:my7yimbtx b); hgive point charge is 100 V. What is the absolute potential 4.0 m away mib,)h m;b jshxg6xxb pyqy5tx 27-:6from 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 distanczy2 dqlb )*p h0f/q8 gt.nxe+ze of 2.0 m from a negative point charge is -100 V. z+zhf l*tq 2g0)enyp/8b .xq d What 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 when a charge 7;3nrdwyw o0;fdxu - hof +Q is located at one of the square's corners. What is the absolute potential at the square's centeo rnxw-0w 7u;fdd;3yh r 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 wks qp24b l7et : d6aonc1mcm1c41 d+rghen a charge of +Q is locatemgbpd+21n c1 qa1 s: 4kdect64cm7ol rd 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 ciep:mfuq-:ttmv 2qv3a(5h*a 9bw 7r z onsist of 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 voltw8 /-v6gnzzzr 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 every respect except fvrhw+vsyt7y3e/0)u k k /)zt that one has twice the plate area of the v)tvfkt/yku r s+0e7/y)3wzh other. 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 k,gmmhrq 1 8e.o6d7jfof C. If the area of the plates is doubled and the distance between the plates is halved d,7g8kf61 .eom hqmjr, 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. wslkai1.m1gco+it 368 57qff: ywxqs The plates are immediately pulled apart. (With the battery disconnecteqwt:6w35sixsc1 fymk+ 7o .lq 1g8afid, 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 mm ,r2lj ,2cufthe plates of a given capacitor is weakened, the capacitance of that capa2m,rml fjcu2, citor

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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-plmdd f 6,p)z2oq w( cw)tdyq2/iate capacitor are maintained with constant voltage by tc6,o)dqdwd22 )( qif ywm/p za battery 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 paral l+6 mq(0bihhvlel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field durinil(hmbv 0h +q6g 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 ad*.pwt,7dz sov,*og y n+.onpiding a dielectric material between the plates of a capacit.n ny,p.sitoop*zow+ *dg,7vor.
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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 of5til,y7b ir l, a capacitor. What happens to the capaci,7t5ib ri,lly tance?

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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 placa 9zlq4 :t)71 erpbxgked between the plates of a capacitor kb)q :1zgare9x7lp4 tholding 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 to a battery and becomes fully charged. c(f xu9j 81p*sfssk3l The capacitor is then disconnected, and the separation between the plates is increased in such a wuk9 pxs fc1ssjf3l*8 (ay 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 the envnvd u87ssd3np )c8 3mergy stored in that8 d 3sn 7cvms38dnpu)v 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 causes the energy stored in that crn5j5xobyth:,09 vie8t q *rgapacitoetghq rrn j0x*o5i: vy9b58t,r 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 ch l56vy p(:xr2dujsgk 3arge from point A to point B. What is the potential difference between points A and B?y(l 2vs p:xkgd5rj63 u

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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 ep:)k b sf-m1c0,cvn ialectron from point A, where the potential is -50 V, to poinfsn pcm0 aik-1:b),cvt B, where 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 accelerated through anayq 7y7.g t:ouve 1 d+d1-tutb electric potential differencaydy. e d-:7+butqovu g7 tt11e 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 through a:5.i* rxttzu93 wht krn electric potential difference of 500 V. What is the speed of ttr3 kr*u5xwtih.t 9:zhe 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 prb-)b-n. * o ybm thnojx8w(4mloton falls through a potential difference of 1200 V. Wha.b*-lj4x hmtnwmooby b(n -8 )t 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 jfv x5/ ;kx+fqdo 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 potenti.afh 6mpy yz7v36y,c5q u-tc kal difference of 500 V. What is the velocity of the electron aft uycp yq3k7tyz56mha.-6c f,verward?

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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 object is accelerated from re ne9/ j(jsy)aest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the pot/)e sjjaen (y9ential 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 potx wke (8ly5rde21kis7) n e7vbential difference between two parallel w1xke en7(7 e85k2)isrydvlb metal plates separated by 1.0 mm. What is the electric 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, witb.su5k, sfb2 th a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = btk bfs,2.5us5.0 m is 2500 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 electinw6ffe ;qc/ sbfc(in 9()6ge ;d u5ktric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voliq c(5s(e ;e6)fb;gk cif uw6nt9 /fdntage 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 yo63b9kx yy28eyw i/0sngqv .direction of an electric field of magnitude 3.0 V/m. Whatyke xq n8o23v y6g.9b0y/swyi is the change in 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 t.dxyc.3j f1b)+prijbu6ij 5 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 1.50 m from the positive plate, what is t+ji6.dxf3ytr1. ib)5j jubcp he 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 2xk7b.*wn)crt*-iufdyle k vn; j 4 j612-V battery. An electron released from yc2i jwvt fjrb)k l6en7xnd 4 .k**-;urest 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 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 consieud 7m m(8p:nected 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 sm (m7 :du8espipeed 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 the east.+rn+c7mys c5vr ;:ln e If the voltage measured relat7ncycse+nlvmr ;+5r : ive 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 elkql*)ijmxvf) v1b )0s+t9vcfectric 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, what is the voltage at a point 1.0 m directly south of that poiijbv)s1qxf ml 9))*tkvf0vc +nt?

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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 offg)-t,afj1 auc9y+o. jx1btd 12 V, it will acquire a kinetic energy jt yb+ducft91)gxj ., 1-afao(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 dis(i, dd8u)j i 4;ob zoxl;jg-bitance 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 the5exaevi +mej7 -y9n rv8or eq4 h 3i7pc0hzk/5 ends of a meter stick. Find the electrical potential for teern37he yh 74zmi8r vc5p0-av +qjk/iex 9o5 he 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) and a -29 /kn0t9o-kw-st ctwj:h) fq)p,wlez.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric sj o0w)f w,:9cntz)phq--9kt wtk/elpotential 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, 0). If thuz8yq33b *hfyvrrguv ol6. ,3e potential is ,yf.u3 hrvb3r8 vqy *l3zg6 uotaken 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 (3we 4+ tec9 1h6l. vyxnkdd92zl.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 iy2 hc+ n6.v9td49l e e1wlxzkdnfinity 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 *q v:+ht8pw 8wev0p 0r *huxll *6npbuthe corners of a rectangle of sides a and b. What is the potential at the centeruqr:nwtp0x * lpvu hh0e8 vw8+*plb*6 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 c3vaq49 1),vv3v+ mb sprd5g:n snspcmC are placed in two diagonally opposite corners. In the other two corners are placed chargesp 1a)v:s4c5g,vdrvsn sc3qbm9 n+ p3 v 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, masq; dn 9)k(yjsws $6.64 \times 10^{-27} \; kg$) 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 2be;djie 8 ti/place three charges, each of 2.0 mC, at the corners of an equilateral triangle of sid j 8e2i/;etbdie 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 to65dvzlwv66fs 100 V66dz 5w vs6vlf?

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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 fbbw7flpoz, rj o,v lp)o ir-(/565 swarea $0.50 \; m^{2}$ 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 fh/v7s3*xt ;wih9f sbal/c- lg illed with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, wt3gc il 9/xsh*b av;fh 7/-lswhat 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 area :opbwf;vtl z5s9g+yp6 -f0sq $0.20 \; m^{2}$ 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 plat6gxf *y -5rpqhe separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the highe5 g-r*x fhq6ypr 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 isndk2s;7qz/+ d5p rans connected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant =5nq s7 rd2szd+ p/ak;n 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 15 mF capacitor. How much energy is stored g/5n-b ohcp5z 7pd :x)gcue n(in the capacitor? b7uc gnd p/no5xp)(h:cegz5-

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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 isiab7w)b71/vz dh* l anobnb 9a28*yv e the energy stored in the capacitor?* bvne 9n8azi2/l *1 ah7)babwb vyo7d

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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 *k2r*6jf4k lbe sc4ty6 leep0 onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was d44pst6e*klb le*ryf62k ce0j one 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 cha9b y-9ery1.fyeplb5 et8 msljy5 / w7crged 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 a5xo i v /q7h 4*.rqfvq:q*qizarea $1.5 \times 10^{-4} \; m^{2}$ 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 plat 7/dzcro2 8z2 5p,tn4tkcu:swoc+yk a 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 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 consistpv -e:p) 6f,jrlrn9l bs 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 constructed with plate uzga60 kmk di,k70g*oarea 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 constructc2;:o)bly (:d c1j1w/iex7grakb z i sed 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.:jlzfu 17 ;(u1be nagw The battery is removed and a slab of dielectric that completely fills the space between the plates is 1euga:b nu l17j;zfw(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 connect ).ul/d 4uh5r( qs fhnf3iaa:y mp,e/oed to a 50-V battery and 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 har( f3e h5nhoauy/4uf)sia /qp m:l, d.s a dielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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