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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?hf: j).mqs4sk

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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 a rgfxlrx*gx8:;98 p0atm f.aj

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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 surroundings. Objectpf4qo2c a0+jmn(1b4cut e a+tx c59zj A has a net charge of excesx2t5+tab +0n9m jo fcu p4qe1c4zajc( s 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 +3wxx(s qsr4zv6iop: 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 di * bo h:szsmrrog)-fx9npw*))rection 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 pn4 ua98pdv;m *omo) wjqe7;j ulaced 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 from rest to a speed v by a 500 V potenug0wt7 s 17l6gs;svk wtial difference. If the potential difference is changed tovwtk gsw1 7;0u6gl s7s 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 sa/rxoup000 cpbme 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 9a.t4)c2t nkc 1fxgqmdy0h7cto point B along an equipotential surfac.acfty dcm07h) q n2gtc1x9k4e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfacech1x m;ahf ;xw1mga :o5i ww,: 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 a particle carryivgp*s dcl ;r61ng a charge equal to that on the electron as a result of moving through a potential difference of one volt6drc*1gl svp ; 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 uni6og*8 l )2a hla((siu x)hyamk0upm 7mt 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 q.8fe*j;xilz;:k u3eivrs,p 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 fm57k. lu wce3*3 ww49kcjz dtarom a positive point charge is 100 V. What is the absolute potential 4.0 74zcw5cw93mk wtujldk .*a3e 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 2h9f:fjfl/ :jyj 1sphs*pp;y + .0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point shjjl :f/ ffyp;j 1p9sp +*yh: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 cs/tkl-kg( sb- t lli gn/nt384harge of +Q is located at onnt t-k-l3 lgisb(8 g kn/lst4/e 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 of a square is 3vqudpnou in- 6*8u (*a.0 V when a charge of +Q is located at one of the square's corners. What is the absolute pot6 vnu-nduq 8*pu*i(aoential 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 cx1o ap2ebm(g 8onsist 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 voltf -n0y 0j)tyoikgyu 8k1pmm :6 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 idvk)0 f z6mp6espxu;.uentical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitancm;ek 6u.pf px6vusz0)e

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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 capawz)eiy,i q2 ;r40rwtvcitance of C. If the area of the plates is doubled and the distance betwvzw4 ,r;2ey0w q)iriteen 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/ sx bmp-./b-ucpkc/x capacitor fully and then is removed. The plates 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 arek-smbxb-.p p/cc / x/u 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 t : ekj1,ezf/jwhe plates of a given capacitor is weakened, the capacitance ofw e jj,1e/:zkf that 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-plate capacitor are maintained with conspljp6xlm+4 ul; 2oja1+ q olh*o d5f7ctant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates mumod1l7o*cjof pu ;q 5j6+hl+l2pa lx4st

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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 parap i 9,dhw* j/(fixqmo8llel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the sjohxfw p (d,8i/*9 miqtrength 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 between the plates ofg3uhwkdxx p5 9o),e* s a capacitorxeop 3h,5xd9)kg u*ws.
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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 pl:re e5 m317rhgs3z shiates of a capacitor. What has :1rzr5 iemsg33hhe7ppens 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 sua2:g-nwbf4 6jn xm wgk8wct/y -s .gs47hw*orch as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the elec7 8gs* n abhwx ow. s4wf:n4jyr2-c/t-6wggk mtric 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 and71 qh z lywq+-;s3awev becomes fully charged. The capacitor is then disconnected, and the separyv3;1sweq hql- 7z +awation 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:gbgdd jy/l:sr4i8.ja- +hxu(ewq 6d fo-wg5 of a capacitor holding a constant charge causes the energy stored in rhxb/jwed +ogl fw8i5g-d6 . u:jdg: y4a-s(qthat 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 ox c.36nf fy hz,9cbg8given capacitor causes the energy stored in that cabch, 9z.n 6cfy3xof8gpacitor 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 po6z67/g,cuky fo2o h(blw3j odint A to point B. What is the potential difference between points A and 7bk u, y6wod2oj6cohlg (f/3 zB?

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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 elokte8 )jpar3.ectron from point A, where the potential is -50 V, to point B, where the potentre3 kptja. o8)ial 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 throohm8q.hhuu uke/ 6*++0 z;sfri.jihdugh an electric potential difference of 500 V. Wh0u /dui+khhz+6 8euijh fsrhq .mo.;* at 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 at7-h xmspvzq+7 rest, is accelerated through an electric potential difference of 500 V. What is the speed of the pr7mvh7+x p-sqz oton?

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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 pvfgw;e;p uan*r:eh6 :roton falls through a potential difference of 1200 V. What speed doean:ufwer :g6*v h;p ;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 in movk j-axu. xc1o7mxy7xd1 ,w8 jeing $8.5 \times 10^{18} \; electrons$?

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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 diff64oxkc. o0nhax*w46 3 hvxipzerence of 500 V. What is the velocity of the electron afterward?xo6*3 ahihk0opxv. n4c z6xw4

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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/ 7az:z.rzolxs 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 difference xolzzaz:/ .7r?

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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 potential difference between tt6mxb 1 g3xej+wo parallel1tjme+g b 36xx 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 parallel toyzx0s j v4icow:ss-41)z6 bicr ih5t . the +x axis. If the potential at x = 5.0 m is 2500 V, what is - 405ci htos6.vsj1 z4:xw i)yicbzrsthe 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 n*bb*u oi ufh,, .br2adirected toward the east. 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 of that point?*bi,uoa f 2brun, b.h*

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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 direepc u+e2pq,c7ction of an electric field of magnitude 3.0 V/m. What is the 7 ucp+e2q ,cepchange 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 12-V ye (r; ri-lbw)3 7 ukierwt9r l4u9*glbattery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 1.50 m3 gtriwrr-7eu y9w lkr;4b l9eu(*)li 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, separated by 0.20 m, are confw:3yd l0bq1y)/9w 5n oukgfbqc* r,cnected 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 mu93 5:cg0dfw,n)lycwq/kbor bu1f*q y ch 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 connected to a 12-V battery. g*f ,dgy wykn zx*g-9 z67b3cr 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 i brn k7zg6*yy-,3 cg9d*wf zxgs 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 toward the east. n0k- l1r3kf7 vfxj6raerr7y 2jp 8rb : If the voltage measured relati26pal frbxnr8ek f1v: y7j 0jr-r37 krve 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 electric field of 50 N/C di4*vf-02ejay jls5d jirected toward the east. If the voltage measured relative to ground at a given point in the field ilyj5aj v sd0*i4fj 2e-s 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 potentiahnw jw/hbf4ye5d rc;96loy9 p0/g;ldl difference of 12 V, it will acquire a kinetic energy (ic49p0 n ; bjglf w9d5;/hohwdey rl/y6n 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 potentialuah xq028v* eg at 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 are at the ends of a meter stick. Find the electrical potenbmr) t2efp8/ q- d+dmntial frbm- dpt+)8dq /nm2efor 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) l(w*u nx+z2biand a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infixi2wn *lzu(+bnity, 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 a*m:5avuc76x; r7tx ao ryivg3./lncpt (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinit3 rri67x 7uvm xvlg.ocaa*n5c/: ypt;y, 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. atcb7yq )jangmxc9 u4zznfi4 3315u30-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the worumaq9znub cgjnty1 a53i 3f) z 73cx44k 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 sidrkd/;zqaz1e() ajm k9 es a and ;(j1zez )rmkqkda /9a b. 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 +4.0 p z+fn2 u;pzw0cskiyky.lx9to(+7-j mC are placed in two diagonally opposite corners. In the other t;kx npjt.yc-fy z woku 90 l+s2(z7p+iwo 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 (chvvu)f*5- bo eyarge +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 the5m: j4j,kg h98v t5qxp1nuqb h corners of an equilateral trianglv thb8,q 19h5mkq5g: j njpxu4e 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 e5(s ny bp7j,ab4a+b9k 1qug v blo:q*on the plates of a 2.0-mF capacitor when it is charged to 100 bu57y 4qbq*ab l+ 9gjb: ,nepv1o ka(sV?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacit,3q bi .k 3zgveb1;hleor 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 filled with air, and the plates are separated by hhgb7 8vdq5pa 2*dshxw 4ar320.050 mm. Idphx h*23gs4 ha8wv7rbadq 2 5f the 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 plas2zq64z bp1k3s0hv opu 9c4lqtes 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 capacitont; qyxz .i )j6on/*ywr has a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate a )qyntxi.z n*jo6w y/;t 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 a 10 zkti2/ duqy 3sl1ne*:0-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How mik2 yze*:dt1/3 nlu squch 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 in cx,2 ,uq;myjl ig5,iu)cae p6 the capacij)iluxim;pcg5a2 6,qeucy,,tor?

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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 i6r juhs4,bc(9quud(f+ /ugn3 y mk7tks the energy stored in the capacch3(u67u,yfgr qnm9 udkkuts/(+bj4 itor?

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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 fjv6bhpnuvtba i- :9 69lows onto the plates of a capacitor when it is connected to a 12.0-V bb 6ut- :pjh69av9 vinbattery. 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 c/vys.dd 0o0it harged 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 areaz ka 2a:i1*6wxc0fi wm $1.5 \times 10^{-4} \; m^{2}$ 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 consistik;b i.u)x5zs5pomr1 s 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 jn imyt)l7rx*48m r-bacfw53consists 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 constrzcsbz2 1 a69qwzli)vx,(3x xevlb;/ qucted 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 cz5cwip)vf h 2,/0gak ronstructed 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. Thed3gdhfj*ry(hc -9a7-6zlbk a7i x;so 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 thzfs(kyida ;x-c 6a7h* -bjgo9rdl73 he 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-Vlcezwgb 7( 3u5 battery and becomes fully charged. The battery is removedgczebul3 ( w75 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 voltage across the capacitor's plates after the slab is inserted?

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