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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?zcd*lf8uj 5sf v/ss2 0eo 8gl6

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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 *rk 4 ,ikea(pbl95hqoa

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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 surr:gxa b2eni/5kc2ibo*oundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a /2ki2*nexobgacib :5higher 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 thed:pa06 g).b;k,a2p q wwr7h zmsa-v no 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 to the electric fieln. btq1e-smwk6./ ;jxxr:yl hd

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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-mmkswxvjbmy37, x 6)aced 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 bt*bd/gttsetyn0q)k s) 7 o13ty a 500 V potential difference. If bne 7y)3t tttsqo*d/10s t )kgthe 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 istdggn-6 f7pgip6c+rqwla 95 * 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 ep13 bm.behf1 f(8dtq;r*wc /br)fcw nquipotential surfac(;t3m1bdebhfw r/1pn 8cfb)f.w q* cre.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surf)yqrb2er) b xrh8d*6w-cxv3 hace 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 70sqxi4vq: . gq ssei7a particle carrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is referred to a s qqxs7iv.7e ig0q4:ss

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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 qbn8qymqu*s8 63jhn5 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 co bd1y jg:m i;r3foj)tp,ubr)4rresponds 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 ta+1daf g3hoysun7 68a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential8o6ds nhf 3a+u1y gta7 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 negative point charge is -1b1 inqaj p;eyl) f-0l700 V. Wha y q; nep0f)i7-1jlablt 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 center5u2 v6f zip nfzbfe+)* of a square is 3.0 V when a charge of +Q is zu2 p*f6+if vnfb 5)ezlocated at one 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 3.0 V when a charge of +Q7xr6)wmuo-c u)ue bhn31c c6z is located at one of the squar6no 7-euz 3x6 bwh))uccr1c mue'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 consist of two charges thadv 52)vhi m8 1zro45eh-qk4 o7favhcct 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 4vdep zy. 37 r 9ryp(jndd(ffml7y70nis 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 eaz+zc:v8 o )xt;ok(xrtpp r s1g-jp5ps .)6svvery respect except that one has twice the plate area of the other. If the smaller capacitor has cz v.6tzvxr1+ jsrp;o( pask8cptg o:s)5xp)- apacitance 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. bh/xh 8d9jika i0/x 2sIf the area of the plates is doubled and the distance between the p hi i8/ah9 dsxx0kb/j2lates 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 i/ g7syxvxu6 g8s removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potentia vg8x7ug/yxs6 l 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 weaadoo6r38 ao w(kened, the capacwooo(86ar3 a ditance of 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 constant voltage by+cz2epz yl1rel2 yuq,/9d- ak a battery as they are pulled apart. During this process, the k,1d2 e+ y9 clzqlzy2e-apu/ramount 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 capacito/fg nvl/8:qsl5 vov a0r are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this procag5qvvn :0so/8/flv l ess?

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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 addi9thv8 a t,mfl0ng a dielectric material between the plates of a capacit9f tlmhta 0,8vor.
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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 pla2m;( ;gx4uf gas/ve nbtes of a capacitor. What hap;nex 4fb sgvmagu( 2/;pens 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 i6m6;peeg7wq ns placed between the plates of a capacitor holding a fixed charge. What happens to the ele7;nep wem66q gctric 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 absv78)r / omgf battery and becomes fully charged. The capacitor is theo7)vr/bfs8gm n 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 constant chadfo-7 f exw-)g1*qmxjm b4: y8,/ii yc mer0gbrge causes the energy stored d:wi,gm1fyxree-g moq0 c*8m7 i-y4 b x/b )fjin 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 causes the energy stored in tyh: lc;,4el 9)tpqgoohat capaciy4cht el;go l:9)p,oq tor 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 pointrg;vv(u ,ral 7 A to point B. What is the p g(7lr vvuar,;otential 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 inyhym-oca 2oq: *. s1o5qsm0p w/jbk1w moving an electron from point A, where the potential is -50 V, to point B, where the potential is +50 Vo51y akq-o0 mj syob/:q.s w c1w*phm2, 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, zeq*jrj et)ht:c17lc 20.fs m is accelerated through an electric potential difference of 500 V. What is jm)t. t7 rljcs:qe*f1h2z0cethe 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 an electrici4s* xuslsp. .vghr p3z 1h((a potential difference of 500 V. Whatvi sss3aurgp l*4( .(.hp 1xhz is the speed 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 fallo*0st:fae o9pt( 8 bwzs through a potential difference of 1200 V. What sp0 ote8f(b9 s* poawzt:eed 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 do in mo u(sg)hmxw2x- 67 nsqpving $8.5 \times 10^{18} \; electrons$?

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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 througgasik7 f h(f/atn+q2n-j4: zdh a potential difference of 500 V. What is the velocity of the electrknh qd2z(:ja f4i-g fnst /a+7on 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 carries8x (at4pcbxruh2 5 d1rm kessa*c)5 t)yg8b1w a charge of 20 mC. The object 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 *wc y5ue2xgadtkra) (1s841msbb8tx)r5p ch 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 potential differst ;0ii.;u :xkfn d;j )zsd0acence between two parallel metal plates si0.ij0af);xzn;dt:dk;u cs 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 to ntdm mgz; e:r7+ 5wto+the ++;mmdw 7to:5nzger t+x axis. If 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 ofg /b20:5 cm,eszx gyjp 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 0segp:zxc 5m2y g/bj, 80 V, what is the 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 direc 0cuxhr7od ltpm3b63-tion of an electric field of magnitude 3.0 V/m. What is thbtp76rmcduo03lh -x 3e 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,gs +p p1we wc5k7au2:i 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 was:2 u1g+57eppwik c 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 batts8b mc7g-xtv: ery. An electron released from rest at a location 0.10 m from the negativ-g8 v s7xmc:tbe 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.* 6oxjmggqx0coja 3 5-pc)ap 3x(qmp)20 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)amjpo5-ocg pg( 6xc jxqm 3*x03qpa) 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 o n7j (2vw44b,vguiitd f 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 dirjb 474vniuigtwv, 2( dectly 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 elect9ok :cx1mcdxl4 s;5kjpd) x6l ric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point sc p: 1 ;lxxmkx4)ok9clddj56in 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 potenoc8dx+uq0tl 2el/:s etial difference of 12 V, it will acquire a kinetic energyl+lu2e/decxos:qt 8 0 (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 distan6 j2z79ds1tdmb8n x lece 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:)s 2; wz :jg,7foy0qqa1c(li uhvxxp ends of a meter stick. Find the electrical potential for the center of the 7f;li,o)v2 j(q 0hswqx ga:z1xyu : pcmeter 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 -2.0-nC charge is at (3.0 m, 0). g pf8cz9fv(e.9kc a9y If the potential is taken to be zero at infinity, what is the electzfpf8yga99c.e 9cvk( ric 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..d1 65jdrbxt5 tos2ts sj6ns6 0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy o snbds 65 tjdjt.o5r2661stxs f 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 -22+n2bw )c1:gut.y re wmbcrr 5.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero tew:rw c52u21r)+bbc myng .rat 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 )ue dfsh-fn(*a rectangle of sides a a )( n*h-dffseund 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 mC are placed in two dim :7es0fhcq)aagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolutaq meh sc:)07fe 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 (c b,xst4--fhvv23tr y oharge +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,g9o3x7w me9q j0s,uj;er m( es each of 2.0 mC, at the corners of an equilateral triangle of side 2s7sm,o3mj;e j(qreue9x0w 9g .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-deuvz/a l paj;q 7b.:)mF capacitor when it is charged to 10a b jl/uq:)7;evpdz.a0 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 capacito:6l,v e* zqyogr 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 t .q wjoqjba):x)wm t.ly(68 mwgdw(;che plates are separated by 0.050 mm. If the capacitance is 17.3 wqwjcxm:).go(lw68b mj.wd t )a;yq ( 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 kgf0 el:n)l1usjs )g,3gv9 vwof 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 capaci+9 kee o87x hgkli+cs/h8t7jltor 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 elet he/9k +k l7g7jos8+ 8xilhcectric 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 acros (;b)o0d okuy71ijpucs a 100-V battery. After the battery fully j1p; ouk)y0(ucbo 7 idcharges 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 m 6hlen(j 3i()4lcbsky wg9.cgF capacitor. How much energy is stored in the capacc()clj3geslybnh9i gw 4(.6 k itor?

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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 tq up ;t4awo ymjs)-)2eyikg+)he energy stored in the capacitor?) k e)4ytoji-uy2pms q;)+gwa

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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 when ityzv il8h rh.vi q)hp7d7l-e r69/d nc9 is connected to a 12.0-V battery. How much work was yh)rp7q . v-/8z lnch6id9rve 9l7d hidone 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 ibn5ikra zf*p*4) l90jf1 j w (janfa(ss charged 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 pl+us(m9pstn mm zhz 7(8ates 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 capa,x (0daply :tf mb :6(*zzdyvpcitor consists 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 platiafb /:)g74 h)h iqk, - ykqbuc4fg9jces 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 con t(*x3sfyrhc+ structed 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 plcfbcj gbfyey+, (ef 40b44uy;ate 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 fullk)ex6( ye4 vvfy 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 constant6evyekv)x f4( 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 )vhvcbm1n) 5mlql: , sbecomes 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 dielcl5n: l 1mq))h v,vmsbectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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