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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 iy5j nev48rs.2 d,f7z t-;m(v4okehe5usowp ls 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 isx5lea5o 87 qw +tmddq, 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 inj+tkk67qi1kao9s j t; sulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which o k7+6aq;sk1jjit okt9 bject 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 electric fiek6h bl1tvabmi-0 y7rph-zu. ldj57+ 2/ jtyu xld

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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 ele*(qfjaq .w t1actric 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. ) pym/)oi (4gucf-b yo5t r3pnbwbvaxf7-1+m 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 500 V pxqr.ci-5 gtt (im:/ m/l/jj djotential difference. If the potential difference is changed to 2000 V, wi:/ -ijx5j /d. tqc(mgmrtlj/ hat 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 same potential ivtevesk::9x2 k l6/fr3 b5wk 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 an equipotfmo ) xv;b3dx;ential surface xbod)vx;f3m;.

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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 b3)yt*3 ww-yug xe8voae

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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 electr8 f;6 um3eejn,0ituw2jn db,ton as a result of moving through a potenuu ;n 2,0midjn,e38 6f ttbjwetial 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 ticu9a q1 u*k/lc qk.x51yg,xof

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corrp tpk n9h35nd-esponds 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 posit m: r6c;1pz:xc: m t(deqiefq*ive point charge is 100 V. What is the absolute potential 4.0 c*d (6zqep1 x ertqfm;c im:::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 poinsho6e bu4 k;u;t charge is -100 V. What is the absolute poteo;eb u hu4sk6;ntial 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 exam)qeja;p.g +q3qobo ;ct 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 qm)b .;qj g3qoe;a p+osquare'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 xs-n/uxgork/8num1ok; qz/ 2 at the center of a square is 3.0 V when a charge of +Q is located 1ukoo/x2 kq/ 8m;nusgxr/nz - 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 ijg9 ce;uk)ckvb;o31consist 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 volt is ap2oc eou em,61

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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 areiypac x cn p obx1,l9,ah,g12pgk+ 16j identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacita iba,1,9ph2gocpky6p,cjn 1gx lax1+nce 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 j./gb09f qc dmof C. If the area of the plates is doubled and the distance between the plates is halved, whfcg dm09bqj/. at 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. The pl( a4q5rsbi*bb y/ust;ates are immediately pulled apart. (With the battery disconnected, the amount of5 s/*(u4i b;qbtabyrs 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 weakenedp yyv: 2p. m64axm0if waejo99, the capacitance of that capxfm4i6pw9po ej0 a9ma .v :2yyacitor

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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 p+vvrh 17oa;p ,b4bv (bc 1d:iftdsg7with constant voltage by a battery a ( v:hr1b4 7, db;p7stp+1vgfaobvci ds 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 parallel-plate capacitor are maintained with cons-:ft6 +kftfmog i -hvcb) 1vn)tant voltage byvf6h)fi bo m-gc1+ t vtfk)-n: a 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 betg2)uxezj2tee:)m1 a j ween the plates of a capace2jm1 :ej)gx uz2)t aeitor.
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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 ofeug7ee/kjbga.dq 88 3dw7 ia 6 a capacitor. What happens to e ib788u jaq/dg6a.e 3d7 gwekthe 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 w35hy-6n8o(gvh fjxiplaced between the plates of a capacitor holding a fixe( 6jho5v8w 3-ifyx hgnd 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 connx(8 xge++ *3zro3euzs 59lv lyzqmim .ected 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 capacitor hiy 5g uq*xmelz(98z+ 33exlmo+.rzv sas

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the capacitancn uis.k7oc -*qe of a capacitor holding a constant charge causes the energy storeoku qsi7n-*.c d 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 capacit2v,f.dr3tdgp- q(pe )6vega bor causes the energy stored in that cap)t3 g b e-2d ,dqvrg.ea(6vfppacitor 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 iq jv )u1mn:a:4uro 4wmove 10 C of charge from point A to point B. What is the potential )u4a : oivqwn1jru4m: difference 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 fro m(6xlqxm- fe6 51ihvpm point A, where the potential is -50 V, to point B, where the potentqvh6xf65p- (lmmxe1 iial 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 re0 gfgc*fjrq9 9dxrsjm6 z9*c/st, is accelerated through an electric potential difference of 500 V. What is the kinejdgjm9czcg9f 9 s f0x* 6rr/q*tic 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 an electric potential d ze 44 zu+yr1:1lpau qdv7ojo(ifference of 500 V. What is the 4 z(qu4d oz:+jpl1rayveo1 7 uspeed 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 through a potentia b/9( gfnh5oall difference of 1200 V. What speed do9bhog/a(f n5l es 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 inl ny/389p ;zmb mmgolu m7i:r. 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 p syamvw *7/6hwotential difference of 500 V. What is wavy/7 w*sh6mthe 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. The object i,yvb9v 2n /d(k;rswcls accelerated from rest through a potential nv bd ys/9;v,(rclkw2difference, 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 thez0 6kdoow7b:0la 3hn x electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field bok7: 0abwx0h6o 3lz ndetween 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 parallel ,c c*w;sgy do8to the +x axis. If the potential at x = 5;cd ,wscoyg8 *.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 electric field of 50 N/C directed toward )t5x3smix t j/the east. If the voltage measured relative to ground at a given point is 80 V, what is the 3xstxi5 m)jt/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 ely uw8uy6yl /0lectric field of magnitude 3.0 V/mw y8ul0/l6 yyu. What 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 m, are connected to a 12yas*yqc f*c5 oi:c,*t-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 the potential difference b*,qsyc cy5o i:**ftca etween 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 tqy f qlbi,t:a0f 959d(otm2upo 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 frfodqp59 ymfb9i(ut t2: la ,q0om 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 connectex8tatlr;i/v 8izp /8bk fus9) d to a 12-V battery. An elect8szi8k/ pr/aibv lt;)f9u8 x tron 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 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 dii, 7 dnkbgt;3xrected 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 pbg3kt7ni x,d;oint 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 dire6haq *afexj7 7by;jca,64y k u4ri oe-cted 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 direyufi 474-oh*j7j xbcy,;6qer kaaa 6ectly 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 acquir+c/a,u9 ;lkvbf 30 lajkao;ute a kinetic energy (in the absence of friction)9+3atvlj, ;/kbakcou0ful a ; 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 -kf1q5,l w a-a ew)gvvat a distance 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 b d: e pzp7cd7+est(4yare at the ends of a meter stick. Find the electrical potential for the center of the mp7+ze4 bddc : p(e7syteter 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)a:2ixg.zd * sj and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be z2:gzajs*. xid ero at 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 at (3.0 m, 0). If the potl 4l8hi k)fse io;t1v5ential is taken to be zero at infinity, wh kv t8i15 s;io)4fllehat 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 ( 2yk /a.nghwa23.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC chk y.a/hw nag22arge 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 rectan+b sirwq* :-fugle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.0 cfqr+ :w u*isb-m?

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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 um6jj4 cb;t +22u wshtgbzj7 5diagonally opposite corners. In the other two corners are plat 2z7 b4m 5ujtcg;hsbwj+u62 jced 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 +yz:ui lg9 d2; ue90yrq2e, 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 t 2 mx(xjy3jgba8)lb r md/k:(mhree charges, each of 2.0 mC, at the corners of an equilateral triangle of sid2bj bmlyra8 (xmjg/k) 3 :xm(de 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 c ccdehc 4r7ts8a+ ;,eyharged to 100 87e dr;+ cs,ya4cecht 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 aret (uh6 n,-i qhj8wb5tua $0.50 \; m^{2}$ 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 q--zxn ohza,ymy;cfn s e3.2*filled with air, and the plates are separated by 0.050 mm. If the capacitanyn3q-2 cf,zzn*m. ha oe yx-;sce 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 capacitom.h g98o *vzcur 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 potentia wn7dw* 4jtyw/l difference between the plates is 2000 V, with the top n/t *jw7yd4wwplate 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 ay0j9 vgi 1hgoconx.-6 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge floy xgj9vcg1.h 6n0oi -ows 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 iszmuiu-8+ 6pqk:d y8pq placed on a 15 mF capacitor. How much energy is stored in the capacikpqmiy8pu+6dq: -z u8tor?

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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 the cbyg0p1aus gok2g)g ;8apacitorp ; u8oagg0) gbsgk12y?

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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 o q/hbs07sv7v vfa8.aof a capacitor when it is connected to a 12.0-V battery. Howqvsv.vofaa7b/80 h7s 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 so that it sty9kint1u du 04d0o+1qb f:d0rnlsy 1tores $2.0 \times 10^{-3} \; J$ 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 plats x38a 9ykcj(qeuh6n6 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 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 consist(1fy -i4dqjm as 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 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 ) brdf5pyt66 +9cxjbkarea $1.5 \times 10^{-4} \; m^{2}$ 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 area x lf0kjc02fbndde,3 ) ku z40eof $0.40 \; m^{2}$ 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 pla; /cy2t5ox *e.kvcfrcte 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 x)-4os xz2 sclfully charged. 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 capacitance of the capacitor af)o-xsc4s l2 xzter 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 full86mr3wt,vi hf y charged. The battery is removed and a slab of dielectric that completely fills the space between the plates ht,iwmf6 3v8 ris 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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