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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*hgf.x ,gpu1(;g uor t 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 coulom+ boktiwh95g3b is 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 ;d5s-p7n ,i+tcq*d , :krc lg .auixyqinsulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is uqr,ls5,-iycn:pdktc7. gq+ad x*;iat 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 dirzgg5 qu/d7 ov4ection 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 diz3z2r2 36 4lt + iowihyyrvrfth-a:hrjw-k4,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 placed on a hollow con4sg(3 6mp ,jfpq/k gu(x)nzrqducting 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 hu6.3vmxfobcp8r(.o kx:volp f7 5b 6potential difference. Iff . h covko5mvxbf3(b6 uro7px: .8lp6 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 is referreoc b* (.i4;pom-my:axbk5aix28h yg ed 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 fromrl/5 .e8jtujo3 l se;x point A to point B along an equipotential surfaceuelj srlt3 ;8oxj/e.5 .

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surtcd tvl3bdf,w *iv7.7 face 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 carrying a cha7;3mq u 6 rbl0bcd(ewkrge equal to that on the electron as a result of moving through a potential difference of one volt isu6rdbkml7q we 0b3; (c 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 uev/o9i mkifv fr*a596nit 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 correspajt h yi*t6y5 /cn1+bsonds 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*/fq5ugd 48dgx6 rr ree(sbf0 2.0 m from a positive point charge is 100 V. What is the absolute p4r qgsedrg5e*xf/bdu6 r0f8 ( otential 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 cha-fahg695*ysvi-.nb-c9ft p )atlm yfrge is -100 V. What is the absolute potential 4.0 m away from cif6 5pm)b-vt a gya*y9l.-tfnf9s-hthe 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 is 3.0 V when 0g,j1m)5w zha *rnatua charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when each of the other)uamn0gh1 ajw, rz*5t 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 atwtzat 6* y+ 8euum*m9p the 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 aw*6epum8 +t m*ay9tzu t 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 that ad/v d6 7 al*/yca.cyhhre

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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 ak3tj huh)l(5sp 0 8lgo

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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 respecbn;8fph48 r 4olo6bxs;) frqx.:khde t except that one has twice the plate area of the other. If therfxk4;s .qbo 4n)8 o;dh6 relbp8xh f: smaller capacitor 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 capacieb:n7tjdo5 g4l6 5,bnrx vm-z(pu vr;tor has a capacitance of C. If the area of the plates is doubled and the distance 6z7np4rbv: t bev5dg x;5(n-,umolrj 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 andy.ctk;y xhgf0p dd0)0 then is removed. The plates are immediately pullec0yh0dpkd;. f )yxt0g d 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 plates of a given capacitor is weakened,)9wz4y6fw x/qsri ntiid yo0( 3fk4h2 the capacitanwi4sf q2z 63whd(f4o/kyynti) 0 x9ir ce 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 constanmsbs-w q5bzbcx3dhm ;) 9 fe +6a70soht voltage by a battery as they are pull xqzbbsb+ch);-9d507m mf6w a se 3hosed 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 maini pfi/x,64efzb6kp / ttained with constant voltage by a battery as they are pulled apart. What happens to t efz ibf6/4kpp6 xi/t,he 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 dielectr3nykxq+kt l/cii)q0 * ic material between the plates of a capacit0)y +kcqil/ xni *ktq3or.
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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 8iy 1nuiu fu0)2 p6y iiotu4a:as paper is placed between the plates of a capacitor. What happen4iot2ii ua0 6f8pu1ny):uiu ys 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 capacitor :wbk/ vm4wjl,2rs8t-rta u1 ghold 8w wr1trjg,l-t4km2 b:v/usaing a fixed 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 connected to a battery and becomes fully charged+ym.-bp:ag+ e ns7z0ikr6gpw. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy storr wi+ ngm.aps6eg- z:0kp+y b7ed 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 capacitorx h yqz*xcc.8e h 1-rmd(8i mpg70.nkn holding a constant charge causes the energy stored in that capacitor t78 -8rxed1mxn ..pkhcq 0g*h(ncmiyz o

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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 store vr bkf b pgo9q68yxld./;6o.od in that capacitor.vlo69gdpkbby r;68q/fxoo. 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 srl (0h9mn) vhknh94ofrom point A to point B. What is the potentrlv9 mok09)s hh4nn (hial 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 potential8v-6ol8s1eztc3z s0pzyei7i jq. h8m is -50 V, to point B, where the poten i7 coez8j.tq-y 1he03sz 8v lpzis8m6tial 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 electr y1x.vw.r:ud1r l (vkjic potential difference of 500 V. What is the kineti.(v1l xr1kdr.w:j v uyc 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 thr)32mxx5-g3diw ro8qg ir yn7 kough an electric potential difference of 500 V. What is the speed of the proriknxwgx-gi2r3my o8 7d)3 5 qton?

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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 potential difference of 12vr0jw8h 1 gfv:00 V. What speed dwj:gr 0vf8v1h oes 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 Vt5p b-sjim+ kk;k.q/ g do in 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 amrr,dq m2/3wf potential difference of 500 V. What is the velocity of the e /qdw2rr3mmf ,lectron 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 char.4 zoej d5x g3hxa5jl:ge 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 magnitl ojh g5e: 53d.4zxjxaude 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 erijta/1t a f o5b.8 vfgbf7*s2lectrical potential difference between two parallel metal plates separated b82fbav*r5fo gat f b.17sj it/y 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, wp1 7p +2tfr6jnggila6 i/x3 cfith a magnitude of 500 V/m, is directed parallel to thjg6igfp7tp 6+lra 2i/f3 1xcn e +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 of5 wiom,wdgu4; i ipc7v8hh 8dlov4q8: 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the vu 8hvh v4wopw,i 7d ;8iid4lg cq8mo:5oltage 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 aloivs/sj)6 ;;j v ln5 p9njvpv-dng the direction of an electric field of magnitude 3.0 V/m. What is the change in;9ssnjvjn-vi ;/)vpvl p jd 56 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 battery. An vc 5;g au+b od76bk(,ow-qhrcelectron 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 difdrgab 7 cb;o,6 (uoc-q+whk v5ference 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 conneei q8r(4y.t5r lxlj+f cted to a 12-V battery. An electron released from rest at a location 0.10 m from the negat5t4 r+eyl jx .i(8rflqive 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 bye bjks7+la8tt: f hh05zy4r8y 0.20 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 ay87fhh zesr+y0lkb:84at5 t jt 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 directed toward the east. If thmen:o9c 12xfs)zb ap5e voltage measured relative to ground at a given point in the field is 80 V, wmo921xz) s5ecba:p nfhat 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 ele.dn5ekcu /47pw 7cb ecctric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given pu/b4 cw kc. 75dnepe7coint 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/t0)y6 w q/kf ywce+xk V, it will acquire a kinetic ener 6q +kw ktxy/wf/y)ce0gy (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 a .sjx)w6+7 / xq;hzyi y(6cv+vom slmmb0;heit 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+2*b ;oxfs986qsbar zgqt h)w electrical potential6tsqa 2bf h+ wsor)g ;89z*qxb for 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) and a -2.0-nC charge is at (3.0 m, 0). If e5 *lc8o7ybyqthe potential is taken to be zero at infinity, what is the electric potential at point8qlybe 5co*7 y (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 nu:f:pjt:s :o*s + 7u-fi mizgthe potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC chargemiiugo:usn*fs: +t:-fzp :j7 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 (je3d 7y 5nieev+h+ s3p0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to br+ 5esv+ d3i3n7ehpy jeing 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 corner 0syl j-5t:lev2wb;zgh3k+ gis of a rectangle of sides a and b. What is -ei+l2ghw0z l;tj5kygb3 vs: 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 dikf*l 7+ u2qrsun iua/os1x. s1agonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential n1sas+r2/ xf1l. *iukuq u s7oin 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 +2e, mass iei57ua y qbdy8 d2gp484hka-$6.64 \times 10^{-27} \; kg$) 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, mjl sw ysyf0n0c6e99f/+d6 klvy/ 7z deach of 2.0 mC, at the corners of an equilateyf6w vlckmesy /dz9 y dl9j/+0nfs 706ral triangle 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 wheazh);yl w yg52n it is charged to 100zyh2)g5la;wy 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 areqgn8r/ 6,imh ya $0.50 \; m^{2}$ 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, andg) 3c5bqu+8b aigi5 wd the plates are separated by 0.0505bu5gc8+i3d) bwagi q mm. If 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 plategf/e vr2 k.8hos 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 potential f qw 91ggn y26 cjjn5v*ef5zl-difference between the plates is 2000 V, with the top plate at the hne 961g5y-nq5j2wf*clf j g zvigher 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 0db(78s- kad1g0 z1 s)uj vokxwd7kw*jxrk+vconnected across a 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 flows from the battery, which remained c07d u-j8bvg dvkk)ww+aszxj1dk 7o01xk r (*s onnected 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. Hed8xccz 48+g +uoa l0kow much energy is stored in the capacito8cu++k og4zdce axl8 0r?

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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 capactbr4b e ih*x8 pl,dnke3bn of-b72 :lq7oxk+4itor. What is the energy stored in the capacito nd4 nple,kf3-b*4+ 8r b eb:hotx2xb7lqki 7or?

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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 whenzfk1w66+-c8aybe ; ynf 0d zut ez:zy0 it is connected to a 12.0-V battery. How much work 1z t60+ynzz6 -kfezwey yda; 8uc:f0bwas 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 charg6djirh x) svaod 5p28mv 2uh:mha-86 jed 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 plate9uh6 z t7gbqy2s 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 consists of p,i1p.-o ybspjvje k2-lates 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 arer1jdlo;74c .ibltn*26eul xm0 9jnj ba $1.5 \times 10^{-4} \; m^{2}$ 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 ,2b,mgud 3xt.kb +sm0(wdc sb 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 capacitorgk1q/x :ne* (v,vwbjo is constructed 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 wroe 9*z4mzyc m (tt9xg fc581zd*:q -lqv(rw 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 capacitanceclq d9wz 5(twzt*yv:ogq*1- xm9me r4r8( zcf 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 86wbtd wcwz- ,50-V battery and becomes fully charged. The battw- d bc8t6wwz,ery 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's plates after the slab is inserted?

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