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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 ijoamxd *,h gse9.h p* -mb-8oks not 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 coulomq6j-eijeqzj-yo) xx7(4x0lpwo /r-j b 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 objectv f sji5k)1ky(s are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grou1ik5sfk()y j vnded. 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 electric finlda0u7p-hh/d n8x m1eld

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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 n uih/eq()f 5zelectric 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 hao+929 mhdpnsgt0i7 y ollow 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 50-c*:v0zm eevcur.n p3 0 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ball bccrp.mnvz* u30ee v: -e?

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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 refer1o5luhy inl /7red 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 poi.u;nngfr7qz,z-3 u5ef+vsjy nt B along an equipotential surface3 .n-;j+yugs5 re q,uv ff7nzz.

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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 o75t awvc*b0rml1lj7 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 cit 7x.8 in,okbarrying a charge equal to that on the electron as a result of moving through a potential difference n8kb,ixi7to. 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 unit2b ymf(ylq;n2)z(y tbtnthiz:d. 0,l 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 co0*p 7vj*r xqifrresponds 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 from a positive point charge is eo hz-: bs*k +zvq2 s/+q7hega100 V. What is the absolute poteneb+ hqhqz/esg7 *:a+zvk2 - ostial 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 negativefjg d:g*8x6 pi uj xng6zr xc4yvhgt. 8759(yr point charge is -100 V. What is the absolute potential 4.0 mu gt 4z976r6jgv:ygrncy8 .8xd 5(fxj*gpih x 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 is 34n jxee7enu5xp49b1 st f) q9i.0 V when a 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 corners is also filled with ex)4j xq94tsn1npb e9e 5i7ufa 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 square1d/r*ki uzpi22xfk pc9( /g5lqzys; o 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 rk9 szi fxqu5p/*2zipc2k (d/;y ol1 gsquare'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 twiq;o-p* wohwm65q 6s * bn*cxwo 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 is a q63t0 lqkx)zr

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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 that one hasch5 sw0s snu-dw7on-u/ k)s:6bqg7o w twice the plate area of the other. If the smaller capacitor has capacitance Co :ss )bh/-c w-7g75kn du6sww s0onuq, 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 capacit/ow l3 u4)qnziance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the ne uqo/inz34) wlw 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 removed. The pl,7n5fef7 w7tm9v pcdyates are immediately pulled apart. (With the battery disconnected, thm y5vcf7t79e7n fd,w pe 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 fielr . ouful)i(xi1b(kg9u-gp ;id between the plates of a given capacitor is weakened, the capacitance of that capa1ogx)bpli9 r(u- u;. ifukgi(citor

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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 c1cpv3alwf g;i/:f9 zx apacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the /f gicz:f;x9a3lw vp1plates 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 maintained wit7.bag u* m9:nytgbl/fi daf mn7t8)n:h constant voltage by a battery as they are pulled apart. What uy/di:na7 lmfgt 8b.)f9m* :gtbnna7happens to the 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 2zm *n n sr581rf8v,z,ttyamsfor adding a dielectric material between the plates of a capacimanm tz5rvf8 z1sr 2n*y,s,8ttor.
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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 cap( 728xiwo .j coxt;l8xh ygz w,/cl8jbacitor. .l/78hoy 2c,gbx8xlj ; i(jxcw ow8 tz What 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 pape9.9ohnalhhplx 4h 9yx 2b *xl9r is placed between the plates of a capacitor holding a fixed xy9 b oa4xhh9 2nx.h99ll*lphcharge. 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 azo)zkg+zk-d 3 nd becomes fully charged. The capacitor is then disconnected, and the separation between-kzz ko+dz3) g 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 co8+3ktlgw a9zff6y r(fnstant charge causes the energy stored in that capazgly 8 kw 93fa+ffr(6tcitor 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 t0 w +vi w-y+x:-hsnnbuhe energy stored in that capacitorv0hi -sw+b:n w+ny xu- 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 d4ji, -wlk6td 10 C of charge from point A to point B. What is dwi,k4l6 -dtj 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, where th cc6mij*)h:x 0wyg3xde potential is -50 m) w30chygcx*: 6j dixV, to point B, where 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 rest, is accelerated through an elecm y(v*m; 8o cv,tb+wuetric potential difference of 500 V. What is the kinetic energy of the proton?mtvmbe*ocw;yv(u ,+8

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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 elect*ouq- +8 pgt5:iwpwau ;ovq :jric potential difference of 500 V. What gqu:w+; *pv:8 op5-qitojwau 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 falls through a potential difference of 12b;.qsl d:k xf:+pv si700 V. What speed d:d svp .:+kb ;f7sqixloes 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 doxmpkojh tw19b0uy - ,. 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 a potential differencet yqr5wql6d0b*c 7)zm of 500 V. What is the velocity of the electron afterwar ycw0rt*)z bm 7lqd65qd?

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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*r 2sk9 oww nq5hk-2en from rest through a potential difference, and af9qh sw2no5-kkrw en* 2terward the ball is moving 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 eleo5k a* *,uigku 8l.hr2nd(iytctrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between tkt*h8l(i25ko ur *i, gdy uan.he 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 direct w41bda:d, z8xhqt4 ired parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, wha1ad xh8:db4q4rt zi ,wt 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 direct*j 252j.niwy y ;p4s)+gn uhik.wdn q8uilw9fed toward the east. If the voltage measured relative to ground at a given2*inh gudfw;.js)9iil2y n y wq48junp5+k.w point is 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 direction of an electric field of magnitude juv7ky/2l/gg .bqidu 1ia6l yzt0*m4 3.0 V/m. What is the change in kinetic energy of thq*dvm.a/7k zu yl6g10guib lj2i4ty/e 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, sepa :pk)tce-z+ wf62i p wa0us8carated by 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 at a distance 1.50 m from the positive plate, what is the potenti2t pweas zk+ -iauc0p6 w8):cfal 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 battery.)f-nsjpq+v mxf umoq52kv 5-- ky. sd3 An electron released from rest at a location 0.10 m from q55xkn -us2+sd.k3- fyjov ) pfmmq-vthe 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 connected to a 12-V battery. Anl(zszj (7rd 5: xbt;ix 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 isr5i(tl:(j s;bz7 dxxz 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 elecp85 pk5qff6h otric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the5f8ppqh6ko f5 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 owmq-1q*-rmu 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 voltq1-mo-urq*w m age 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 acqn ts d2;53zzkt8wp 2(,zatu pwuire a kinetic energy (in the abwwt3 ;2pnps8 ta(t2 u,dz5zzk sence 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 divuy7tmg 3l z-.dd ydu9y kep4qu143g) stance 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 e-ab;6hbwlr4.pn3+ g dv+m+f4r nnvethe ends of a meter stick. Find the electrical potential for th 4eh3en-bf +vdm .rlwnn+pb 4g+6r ;ave 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 au wx() njks bjnchm276fm;93pt (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, mws;kb u h9p) jnfx6(3jn2c7mwhat 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 -2.0f6p;u;gwx;b/k( xk o b-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-npxuk gkb;b;; / (oxw6fC 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-spg24gv srcl:e ue5 0.nC charge is at (3.0 m, 0). If the potential is taken to be zero at5lsg4 rsev.0ue: cp2g 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 rectaoi,;v 7-tlfd,kk * 4; zbubie +eg4cgnngle of sides a and b. What is the pog,4 -t,7l;*bkigz uo bcein v;ked4+ftential 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.liw 6o,a0x laf haop/t2n 59 ;(f4o1okzeui r5 Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential in the square's l k0 w(oaore46;a5fi xtn1olfi,2hoz9 pu/a5 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, maag uo8z)kh xrz2rn)3p :lm ).xss $6.64 \times 10^{-27} \; kg$) 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 th :((ou(c 6n t*rlxyylap) a*shree charges, each of 2.0 mC, at the corners of an equilateral triangl(s:hrlnoyt( 6cul )p(x aa y**e 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 pweh2f1 2: ,jfps. klwklates of a 2.0-mF capacitor when it is charged to 100 pkf , .jwe2kf1shwl2: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 5amqj0au bc+t .:)znro g.o* hdb5 ;fcof 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 bym p/aphn 4svxh8d-y dl3- (g.q 0.050 mm. If the capacitance is 17.3 pF, what is the pp qy(.43p n8/ gvdhs- -adlhxmlate 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 capacitots7 0p*ojp *az5c v.xmr has plates 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 cm9kbwb r: t8s5a. If the potential difference between the plates is 2000 V, with the top plate at the higher potenw t8r5:a9sbbktial, 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 aqqb rv niqc -;xxzy7yp,9+/mw(pv81pcross 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 flowb87wq1 p9-xqvrn;izm+xp y( qp/c yv, s 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 7oc l h (68*lyoq9qkdmis stored in *l7loho8q9 qkcm6( dythe 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 capf/2ray /4vr1usall ni52 1bhlw2mluf.hz v)6acitor. What is the energy stored in the capacitor?bi42vr1lmy f a 5uu)lnzl./ r/sh62ah fwl 2v1

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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 connectedjm: dq( naa.9k to a 12.0-V battery. How much work was done in charging this capacitor?mdk na.9aq( j:

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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 s+s2 7:gemb-n-jm -eyfn rqkk-o 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 capkbd:+b a 4*p(wi g1ue aawr04bacitor 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 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 plates of alo.p2clk -o 7cnn0o, zu)js:wrea $1.5 \times 10^{-4} \; m^{2}$ 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 capacijho :).i yi96 qg)qhrytor 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 construc0nq/ 6.jhi*q)lmz .yfmwu9srifh6.pted 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 capacitorbwhiq, gj 5kp08(u)7u*ezzz 2 / ztphe 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 5lh5. ku38-vwox dupg a 50-V battery and becomes fully charged. The battery is rem3wdk -ol8v u5p5gh.xu oved 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 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-Vslffl ww07rg 23x+d ns5l/i y, 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 vodfyl gisxl3s/ +2w fl0,nw75rltage across the capacitor's plates after the slab is inserted?

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