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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 m-yr w:k; hwbv8j/gh* -10dp ik2 nusanot 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 is2cuh *b2us3u s 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 (vxgf396 rnfl5zhouq.xg p: 4surroundings. Object A has a net charge of excess .nx rgfx6g( 4pv 5f:ouzlhq39 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 the direction of the electry 14rjg xb4mja)fd(0 3.hn axoic 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 toelpyt-(;4 *gv zc8uyj 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 conducting sph et(qadas,ub;2 lm6 ;(k rza5rere. 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 5gct f-j)qk7b 9 4lljhrest to a speed v by a 500 V potential difference. If the gcq)bjjl7kf 4 59 t-lhpotential 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 tfh:vlv.rw14c g.kw : at the same 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 to point B alw +gowrl83p0d si nr22ong an equipotential surfacdrsno+ 2wl pw2r38 0gie.

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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 4p j4ie1 zluj1be

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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 elect(hvarmd+d7e7t m9*b q ron as a result of moving through a poteb a77e vr+*hmtdmd9 q(ntial 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 z /5 h /ssplv;y(f0wjgunit 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 correspo fa4i4l-e:o pc*zcl( fnds 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 asu,)6+ +wrv,tt87j gvkyl n,dd+ggzwko, o +n distance of 2.0 m from a positive point charge is 100 V. oudv8 + sv yjot+,k7n,,kwwdl z ng+t)r+g6g, What is the absolute potential 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 -1 tu0fa+z)s 5npd 9),2c(3jbu lx so 9lhto(nhw00 V. What o,lh ntl(uxb+w0 9fcndajo)zs2(ph t 3)9 u5sis 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 :)-4nyly2zqf+ a ba mru54ynpcenter 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 poaqr-4nluf:5na +mpy4by2 )y ztential 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 squarss: q 6hoy5 x:b,tum 5q1ht9she is 3.0 V when a charge of +Q isuoxt15 hs:sbtsy q6 mhq95: ,h located 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 alwaqi;s mqk0 ,t9g sw;qf:ys consist 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 ygv l0* l*a. 83yvgt9ssa yn7nis 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 rp/b3dus7e -c uespect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the largerus/3c7b e-dup 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. If the area of the platv. + ibnr r0r:pna0nuf)3cv7p es is doubled and the distance between the plates is halved, what is the new capai)nvn0pa p0 cr b7 rn3+r:vu.fcitance?

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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-plakr,5cge qk34lte capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount ofc4e5q ,rgl 3kk 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 clxf,x:cn-vyn ) )n z/h z*;wxlapacitor is weakened, the capacitance of that capacitoxnn,;cz-zh) :/*fvw )xlly nxr

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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 capacito7j)b*y qu2ry er are maintained with constant voltage by a battery as they are pulled apart. During this process, the amountqu72r)y bey* j 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/eze7m+3mubd; ts 5k c-;yfair are maintained with constant voltage by a battery as they are pulled apart. What happens to the strengt 7mbzycf5;eid3;a e-sumk +/th 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.g : hun,mz8do a dielectric material between the plates of a capacitm:,unz .8hgodor.
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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 on *cxhcv: zb/)f a capacitor. What happens to the capaci hxvbn: */)czctance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material *)+ byrz.0kl j vwdx/65dobkqsuch as paper is placed between the plates of a capacitor holding a fixed charge/d+ o)0 .vk56*dkby jrwbxlzq. 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 char;meic)/5 adz)k qc n,kged. The capacitor is then disconnected, and the separation be5k)niq a mecz kc/,d);tween 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( vnk6,qe kkr0 a constant charge causes the energy stored in that cn0 rk6k(,ekqv apacitor 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 storeek n/086qhcvz d in that capacitor0v hk n/q8zc6e 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 p .ve*o1 2nuzdfx15 djzoint A to point B. What is5fx.dz no2 vej*1z1 du the 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, .*na 5i/v6u: njvj xxwh1(uoiwhere the potential is -50 V, to point B, wh1 n.uja/:hn6iuxwiov *(x5vj ere 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 restwn7y 0lj n):z2)wrjba, is accelerated through an electric potential difference of 500 V. What is the kinetic energy of the 7n :zlbwjra j0y)n)2wproton?

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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 res.hm(- hkjc(,q xrxu8pt, is accelerated through an electric potential difference of 500 V. What is the speed of thuk rx (ch8pqxj (.,-mhe 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 p toasug) e53vz7/ytb8roton falls through a potential difference of 1200 V. What speed does it acgu et3tb oyz)7a/8 5svquire?

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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 mojth2gj3joub (k-:vz+co9yz 0 ving $8.5 \times 10^{18} \; electrons$?

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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 differenc 9ujzc1 jza8*he of 500 V. Wh8 ajjzz9hcu1 *at is the 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 is accelerated from rest c*eorf q.:r-ollpm nv5. -8nothrough a potential difference, and afterward the ball is moving* :m58rqcolpo -. vnnorfe-l. 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 the electrical potential difference between two par7e ex*k4 hfns5u r7vpar0 s9+qallel metal plates separated by 1.0 mm. What is the electr7eav097r*ek f pnsh+us4qr 5 xic 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 direct21jp/lbcj erz +su-j ag* 0lzz(bdi .,ed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potentiali-lel,zb+. dr 1(j02jzc ps a*b /juzg 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 thx8gad s3,gdn ;uz/j 3g- 0hsiqe east. If the voltage measured relative to ground at a given point is 80 V, whatns,jzd g0a3shg 3d8/ ix-u;gq 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 directifa n1ed a8;em5yw,h(von of an electric field of magnitude 3.0 V/m. What is the chan;m(a, 51a8 hvewy defnge 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 mbe).3 u ba(zv1p ljw8n, 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 ivnj.)8 uzb3( pew 1blas 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-Vb58 8foa .b/ nbhao0wlb12sqg 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 much kinetic energy does the electron gain oga5 b bwb0qb1h/.osf2l 88na?

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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 0.5ploqtdyv u5dfq8a lt,) 5i.z,ca/8*ec d ,yi 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 arrives at a distance 0.050 m from the positive p/cd ucaidl*ey85q5o ld,,p q v,zty.5 a8 )fitlate, 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 fielf5vn3z bpq-ce,mq fss g fc :u/)e0+8yd of 50 N/C directed toward the east. If the voltage measured relative to groun- qc/,q: p 3esbn yefc8+0mgs zvfuf)5d 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 directed toward quzu xlr51ktm9.n8 p 06;zcdsthe east. If the voltage measured80;nxl. trzud 6pkq5cmsu9z1 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 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 differenv: -3 :bhgryfhce of 12 V, it will acquire a kinetic energy (in the absence of friction) rg:fb:3h-yhv 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 d8pyg *s;e xsc+*s b)xat 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 env,i wmzr+9q 3ci+hfx6 ds of a meter stick. Find the electrical potential for the center of 6 izhvm,9 wx3c+qf ir+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 -2.0-nC charge is at (36a; jvla. :arq.0 m, 0). If the potential is taken to be zero at infinitjr a .q:la6v;ay, 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),vj mel;qoz0 ). If the potential v;j le qm0,)zois taken 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 (3.0 m, 0). Ifjydm;na 1ko0:;jybj ) the potential ynoj0j jm;d;a ky1):b is taken to 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 side.btg:4 )f uq5rejdt b5s a and b. What is the potential at the center of thb.)et4bjd :5ug5r qtfe 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. Chay koqw;br5 s23m: aff xg0:.pdrges of +4.0 mC are placed in two diagonally opposite corners. In w:mp 0fbf2 yqga53 ksdo;xr.: the 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 (charge +* weg jcz,dfv3dt(9w /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 the4l2b-zp p :r2tvndk :ree charges, each of 2.0 mC, at the corners of an equilateral trianglee:rp42bn2ktvpz- :ld 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 8occ+o zhibp* 7y 88awis charged to 100 a+8zcph7 8o *ioy8wcb 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 ags8z,zxh ;;bcru a+f7rea $0.50 \; m^{2}$ 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 fillvclp 5ud92 -ssed with air, and the plates are separated by 0.050 mm. If thed-cvp592 lsu s 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 ofrfl,ymwrfi-a ,.*i2y 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 9 lanot0 g7zv)*w js;u)6jhshthe potential difference between the plates is 2000 V, with t hns;uoh tvj6*)7zlaj)sw 9g0he top plate 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 ,wyli k.1ia4 jconnected across a 100-V battery. After the battery fully charges the capacito.aw4,k ii1y ljr, 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 k. ihgif90q x-much energy is stored in the cai9qif 0 kx-.ghpacitor?

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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,c4gkz,8zd w5-rk i us the capack,idu z, k5gr-c8sw4zitor?

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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 it is connexd* q ,p7b cgg3a+tuciqz/9d(cted to a 12.0-V battery. How much work was done in charging this capaci3, zd*b+uqg xc(7 t9qca/idgp tor?

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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 (giav q+/i5 6oggt,fukq x *s*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 cont(3c -c(rg9jw(x gv dl7a3q:rzfl3ot7rf- yq sists 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 consiqq+:o5(vx m zgjj t5,ksts 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 capac, ;c3*bpqndz/oa z2wditor 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 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 constr5kc lpww sy 89ud1.*utucted 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 wimjr,4:3xkix(7swyt uha rbh v6x * 2j/th 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 5b rpauaqz+1 5g(y-vmngz-2+ r0-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 dielectric constant of 5.0, what is the capacitance of the capacitor after the sl +u1ygrmbz g- -raa+qzpn25v(ab 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 fully chargenv.u l; 8mgqy4d. 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 voltage across the capacitor'sm ;4qn8u.lg vy plates after the slab is inserted?

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