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习题练习:Physics Unit17: Electric Potential



 作者: physics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 notuvvr-dqfil qkd a-// a0( 6t3k 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 isriv 7(ssj/96.x aea nfx5 kk7o trb(t0 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 their surroundingsj;by7 aql*ndig;p59v . Object A has a net charge of excess electrovj5b9;; p d yi7nqla*gns. 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 i; h*tkgg3ckc7n 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 op/+.ga kzafn. pposite 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 hollow gn*ecloqcsa ( tjw8b,,ha -)6 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 from rest to a speed v by a 500:v wx xq7u.jt2 V potential difference. tu:vxx.2 7 wjq If the potential difference is changed to 2000 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 all points are at the same potential c.u+buv hmwlo5h jb;*ur;( u;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 eqkv v,v ng6q*w0(qd;fo uipotential surfacdvv0fg6v o;w , *qkn(qe.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface -)68frq hi7j f f7 zxdnyagj) g4*tnb6must 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 partidnk (t5no86jg /u jo1ecle carrying a charge equal to that on the electron as a18ong6k (tojdeu n5j/ result of moving 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 m/t j(y7- mq n(ci5kwza unit 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 corresponds tzkv r49dh.7x0*oa fb do

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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 charge zmkgq **+mg .i3d0uddis 100 V. What is the absolute potential 4.0 m away from t md m g*30ddgukz.i+*qhe 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 fd1 e0h34 v)g) agglehkrom a negative point charge is -100 V. What is the absolute po)e kg v)gdgl041a3h hetential 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 ;aft1cj8* .q/hlqnkj x*60z)y .zx jbfoc;cc 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 squarenz;) *1catf6jqy xb0k. x zh*;c.j/cjlqf o8c'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 wh yz.qm w5b3o.ien a charge of +Q is located at one of the square's corners. Whatmywb.5 qz.io 3 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 chargesas6y, s7q j.svdx-1xcad4l2b 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 voltt7ep8 kq0dc 5q 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 t4:omro q 4 abt.h6eqd8hat one has twice the plate area of the other. If the smaller capacitor 4mda h4q6obter:q8o. 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. Ifw 88jq).m;rohrg gf8f the area of the plates is doubled and the distancer j f;8 fr.hogm8gq)8w between the plates is halved, 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 rem-a0 p(hpp:tis qxz; +xoved. The plates are immediately pull0 x-p+ths(;pp xaqiz:ed 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 pbw ru3pc*2c3f4ny st0lates of a given capacitor is weakened, the capacitance of thswt2u303bfc n py 4*crat 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-plx-h5sm9 ,,e oxna,lq alrk0 x(ate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the pl-ln,qoaa 5k mh9r(x ,e ,0xlsxates 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 pw 2kl:2(1nl8ojes:f hqg .u sare maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electr( h2ps8jwsqfn.lu l g k:1e2o:ic 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 plates o,78n t(e2hhmipusiqbt4j7, 05 kppdzf a capacitor nmhd0e,q u p5hs2ij77,4tk pbi(z8pt.
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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 cmd0k/mla5)uu apacitor. 0uml/k ma)5d uWhat happens 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 placed between the plates of a capacitor7v/1xe lixn)oa; :r+l3 pljgc holding a fixed charge. What happens to the electric field between the pl nlio;xp/ 13aglj: v7rce)x +lates?

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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 fu(3fo pi wf0dsfo/vm--3+v /cnmq1m pelly charged. The capacitor is then disconnected,w o/vps cf3n-mfd-13f0(v mqi/po m+e 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 holdinhdda to+j0d c24wmme/t1 /8w lg a constant charge causes the energy stored in that capa/ etmjd/l8dm4oaw2whcd+ 0t 1citor 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 tha po: f yt ev7l):q o68hrioj)qwh9)vo3t capacitor3jqh9rip vwh )f6qto8l) )o:v:oy7eo 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 z2+f.qe9k sqwl-1hfj from point A to point B. What is the+1wzj e2 fsf9qh-q.lk potential 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 from point A, where the potent1lap4b)j3 muk ial is -50 V, to point B, where the po )lk1jmp ba4u3tential 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 electrhm,+k4xbw c66tq o sqq; xck35ic potential difference of 500 V. What is the kinetic energy of the p6s qxb 3ckx45qq,+; wcthkm6 oroton?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially atu4hp bc)*bj0 f//r .sixt-q y6;gujbr rest, is accelerated through an electric potential difference of 500 V. What is the speed of t/ir b.ur;6)/s x4tcybbgpj*0 jfqu-hhe 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 potau i5e 5/zngdvvf.1l;ential difference of 1200 V. What speed does it auv;1d5l5/ zav gn.eifcquire?

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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 inv6 6put ,rr/uyymjt3cg8p,g9 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 difference of 500 V.odaj.c a+*g zkb 5.;8r zxqt.yj+q7ke What is the.k gqykbqt a85*c+za7j.z.jexdo + r; 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 objeavg8wg03-i jpct is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0-3jp 8gawvi0g 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 electrm*cm*c)c3-skm2 - 7ktf bcx kkical potential difference between two parallelk k*sxc*3--k) 2mbm7ctc fmkc 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, with a magnitude of 500 V/m, is directed hf 9dv)z r.(reparallel to the +x axis. Ir(vzrf dh9.e )f the potential at x = 5.0 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 the east. tkpa.g83 ln+s If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly west ofn a8t3+ spgkl. 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 th0t 4*ygml5-rwb,lv tn1 +dvg+w5yqq te direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy ofvwd w-qrv,5y 4*nl gm0tl+t t5g1b q+y 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 12-V battery. bhtgfy528 n zvxwr4.++t,ag f 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 tgb 2 hftxf z54,a+8n.yrg +vwpositive 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-V batte7+t8i4 +oks ygbeu d,g6auv w+ry. An electron released from +i boueyaug,+k w67+g8d vst4rest 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 connecw7f c4 mz*59ff*n3 to,ojtei cted 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 cmizo3tfoj9*c n4*ef7fw , 5tis 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 el/w5zs km pyt-;fffb70 / jhq4rectric 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 7kf-r/f ywzfpjtm 4b0s5q;h / 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 fiev j9z::fw/bh-p d6n:vxvodp; ld of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point d ppzvv:w od-j/nfx6: hb:v9;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 will acquire a kiqh i *l,p-:ixxnhi pl -ixxq*:,etic energy (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 kgzja:(u8c; he, zk m.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 are at the ends of a meter sm*f 29teouzr e mft2:5tick. Find the electrical potential for the center of the meter ste:92 2 ffe*omrt m5tuzick.

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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 -2.0-nC charge is at (3.0 m, 0). ik1x/ejuyj nj6f; 2b4 If the potential is taken to be zero at infinity, what is the electric potential /ujj61jk 2ny4ix ef;bat 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 -2.06eoauo+9y4 v+9hm man-*rel k ux8nma+f8hx7 -nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, whau 6hrea7a* 8+a l 4nxe+9mn h9-y mo8+ovmkxuft 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 -2.0b)(p/u l w rv;e8u.p iq7spnwjc)j,e2-nC charge is at (3.0 m, 0). If the potential is taken nise. ;rq)pw/2pp7j e)c8l wvb,u(j uto be zero at infinity, what 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 rectangle of sim(b+x5 fu)t rd. d3ofvdes a and b. dm5 otx(df3r. +bufv)What is the potential at the center 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 s;q1nx 3b 3ggj+4.0 mC are placed in two diagonally opposite corners. In the3gsj3x; b 1qgn 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 (charm-0g b6 lia:ewcxaz ,:ge +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 mC, at the col2*u(q lqz(slrners of an equilateral trils(* u q2zlq(langle 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 is wdz(4kcv8q- k1 qr in2ah ui*(charged to 100 dc-qw1i an*8 u(q krh4v2k(izV?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitx0w ffozz+b:sqbn 319 f1s, yvor has 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 filledy9jvgej f vv2*i 3 uxk31gxv91 with air, and the plates are separated by 0.050 mm. If the3uvvj veyxv9gg19xjk123i*f 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 oflnpz,z tb; t wr,c7wdbh7jeot ta*.02tc:+;l 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 capaciq(xt 8dkq1 hb9ng 1u*btor 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 fidh(9uq 8t qbb1x1kg n*eld 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 7e waqes.b 8c6across a 100-V battery. After the battery fully chargea 6.s7wbc q8ees the capacitor, the 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 placed on a 15 mF capacitor. How much energy is storyrzdocs )416 eed in the6rcody z1s4 e) 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. Whs8;iwx-m y .yg8 j4njhg:f *t+wl+kbbat is the energy stored in the capacitokbm +g i84wl* x+b:-8yyj. h fn;twjgsr?

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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-ngi*xuf tg0lfh hv7 00p3u r0 plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging thlg*r7 t -0 0ifhpvu30nuhfg0xis 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 stt9*wgia*d) 5jyu ewp6 ores $2.0 \times 10^{-3} \; J$ 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 ace //*u hf p.k3/t owf5qqmzz*0ml3vconsists 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 consistog5 ig36hh5zc (eaklesbk 2-;e/-t wds 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 cons,2cs nrdcjzkcf5 s9 e;+b )ey3ists 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 capaci;o +jmw9m+g:uyud,f rtor is constructed 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 const6 yg+e+w br13kvr x-wgructed 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 connect5 hr psr.cwi f,on:e6)(1uq5zr h,iuy ed 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 has a dieo6nyzrsf p5hr(wuu1,q : ih c.r),e5ilectric 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 5m )svk83ppqjsl de 2,aod8)j50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that comple, emo8kdp)vqad 8s)jjs25p3 ltely 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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