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习题练习:Physics Unit17: Electric Potential



 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 vec1ewu 7y 1hdqb/tor?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombeoh k+c05 *8lm; s9pkbu0mi p :vjt1gs 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 insulated from thqmo dqv7 rzv 27; hy(3py0hzmzif;5 j)eir surroundings. Object A has a net charge of excess eq( 5rzp ; vvhhq 2y7)3jiy 0mmdofz;z7lectrons. 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 directivrr: oz gu3ua o-5mni36u:*db5 jf v(don 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 directioujictyq0qs+- )9aod .n 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 conduc31pv7c( ndvy wting 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 3.4ewfxt /x+ pxwvsg:accelerated from rest to a speed v by a 500 V potential difference. If the pot+3 x v.x4ww/sgt fpe:xential 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 allr5:)0;sf uyjoc p.* srd5c mbn points are 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 along an equipotential surfus( 0h9+ ckp4ukwt6 azacec akh wz4s(t06u9+kpu .

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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 bem cng(*w 8dm78l165k rzdlp qc

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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 65iyf2-lsgl y q 7k m2jg*.kdha charge equal to that on the electron as a result of moving through a potential difference of one volt is k gj5 *yd.2lligy6q -fk7hs2m 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 unit 3gy0d3mg 4df35bm ci 9a ouze4of

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correswgd8-:86l9 mhjuw u qtponds 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 posi6( nulkhvd d+ ;*,pqz) ; gg56yigpqbntive point charge is 100 V. What is the absolute potentialkh z( )*gpgp;5yv d,qbniqn;+d6 gul6 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 vajzc/1cd8 gd7 z. ku4negative point charge is -100 V. What is the absolute potential 4.cvj8d kz7 gd cz/.au140 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 b19oc-gr 0wk*ehxl k*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 at the square's center when each of the other corners isxrhl-*gcbk w0o1ek9 * 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 3.0pcsh/-t :v/dzsmcja . ;g9f; cuzoks87t4;ai V when a charge of +Q is located at one of the square's corners. What is the abso cc/g;t;4c t;7 8 spmf-v/jai.aod: z9zsukshlute 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 of2jkyff . vxv99*vz 2ohc l5m)i 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 is :d1jl 89zzj w1dua0vkny /d0wa

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate capaxht/./ + tdfn1o* qrnpcitors are identical in every respect except that one has twice the plate ath/nf.p otqx+*1r /nd rea of the other. If the 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 capacitor has a capacitance of C. If the area of the plates mg1l8, rac1 avis doubled and the distance between rgm1a81 al ,vcthe 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 and u-ld 9f(vonrlu 2a0k,then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What l ,nd 2ulo0(afvk 9ru-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 y-az b)q5c ufyz8gqlwn-; i9v h;-oc*plates of a given capacitor is weakened, the capacitance of that bc;y5 lv8;fqqw9 zauzcg)-i-- onhy* 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 caparo)bbnd9b5 f .citor are maintained with constant voltage by a battery as they are pulled ap59nob.f b)dbrart. 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 maintam- 99zx(yx edzined with constant voltage by a battery as they are pulled apart. What happens to the strengt -xexd9zzm( y9h 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 5bvl*i dt 0ji n40 ao./ed-;wz 4mljwxbetween the plates of a capacita4o* /e0 b0ld4td-;zx w i lj.njvm5wior.
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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 capacii*e) a/lvl p70xea6hptor. What happens to the capali/x6ehl pe7v0a)p * acitance?

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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 capacitorxb brxnwf/; :( holding a fixed charge. What happens to the electric field betwebrfx:n/ w(x ;ben 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 :bl ;0ui4jwd l9q6jrobattery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The rb6:q 0id4o ;9 jlluwjenergy 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 charge causes thcs jwpe9-redo7 9n+5y h,z*rxe energy stored in that capaci* 9d+zyoesjxew p95r7,cn-rhtor 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 qqta ;k0n/ta2a given capacitor causes the energy stored in that capacq2aq;a/k0 tntitor 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 chaw e*an)n0)nqtrge from point A to point B. What is the potential differencee)0 w)nat*nqn 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 p6siek t3lsb7, otential is -50 V, to point B, where the potentsi, s7kbl3t6 eial 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 nkffr7ipcjq85w9 v 0 l77kb; grest, is accelerated through an electric potential difference of 5g9v; 7wnpbk 7ci7 r0kl jfqf8500 V. What 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 at rest, is accelerated through an elecmf74njqste gh j1.s3 qaj() n6tric potential difference of 500 V. What is the speed of jfjs)m7 s1h ta 3qn4.n6j(geqthe 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 potenti )tew54oxo) x34fipt9dqnc v4 al difference of 1200 V. What speed does pxef tdcw)q xt4)n v944 io3o5it 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 movingie gvc *obzp9p+ f3);y $8.5 \times 10^{18} \; electrons$?

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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 difference ofr4 0/*iml6 mr mno5u lfj.wv9e 500 V. What is the velocity of the 5m0rwmo*m. v69jlr4l /nefiu 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 accpl*,, 4uf kv1t2jns voelerated from rest through a potential fnv,jv,1* osl2ukpt4 difference, and afterward 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 electrical potmag-f9*5zgr+8sggx 5h2zf d9ltjfw 6ential difference between two parallel metal plates26 zt dx zaf9mf-ljwf5g9sg+5hg8 gr* 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, wcd9hnk6+w s6a +t8zzwith a magnitude of 500 V/m, is directed parallel to the +x axis. If the po68+zw+a9 wcn6 t skzhdtential 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 fielp:: zx.a4gjv vd of 50 N/C directed 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:gvxza.4v : pj 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 ar6vzd::c, -iy k u5mogn electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the 6gr,iumzovdcy:5-k : 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, s/ qc-*pk l3lv4su3bj aeparated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m froms3 baqju3/ -lkl *pcv4 the negative plate. When the electron arrives at a distance 1.50 m 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 0q:j f*/c8 v.shs,yut gvsu.ozfk9q6 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 f uf/q9ysut: ssg0h8q6k .zvv cfo, .*jrom 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, r8lauf 9 li4a9are connected to a 12-V battery. An electron released 4a9fali lu9r8from 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 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 3guc zj3z2j3v md0d)u50 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 directly eu0v)u dgzdj3m3 3jc2zast 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 to:/kh.x:7s1 :du :1qaoj h3 doveg aepxward 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.::e.v3sx: khadhj ogd apox/u 11e:7 q0 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, ite.ss(1eovw+4mm o*u7mcjute r,2 n6t will acquire a kin m4+ur(ve*e1.o tnc 67s me2otu mwsj,etic energy (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 dis2ff x71wlcp,3rl )ouftance 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. Fe+w pl*f2ya an/h -dj3ind the electrical potential aljea*wh yp2n3-f+/d 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 + sav 11u geofs p2:ijio1t46aat (3.0 m, 0). If the potential is takg p6ov 2fs+to:j1 i114ausi aeen to be zero at infinity, 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,6zm af c98f8hp 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a acmf8fh 89zp61.0-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, -zd(a8 mo vcu)0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zerm8 v(o)-ca dzuo 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 kcc0f9 ltr-)tn9ynzsnowj0b *q8:6 ucharge +q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectang089j6l9)yo:rkcbqnu -nzscftn*t 0w le 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 +4.0d7ofwj .(5r6 k5vonv v mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC7o 6jnvw dvf.5 rokv(5 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 (char f:f xx/*dx6uegospjk2q pu1o k1n.8k z .5rq2ge +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 necessa8psefhxje83 *ry to place three charges, each of 2.0 mC, at the corners of an equilateral triangle of side 88 jhxf 3pse*e2.0 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 capacv)ajv 5;:tgd witor when it is charged to 100 V?w;vdv tgj)a5:

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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 platcne . t)gfzwejjh73: mc ul1*r6pak ):l r)0aues 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 aickw f2 *;qw*4wcvfe5l r, and the plates are separated by 0.050 mm. If the cwekf4cqwwf*25v ;l*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 plauit) vnz70* uhao 7w/ites 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 hyy q3p. wq)+l:r x:ja1s;m runi1wk i/as a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher jpxaywk q y;il)1r3/.ism:r+w n:q u1potential, 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 f tzreye62/r(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 flows6e/trzfer(2 y 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 capaclqt b3q2av/u )ay (d,citor. How much energy is stored in the capaciqv3 tcua2/a(bl qd,y)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 ag syhh0ba(*3 a)-ey ;s qea2yv 15 mF capacitor. What is the energy stored in the capacia-)be; hq (asy vy*g2ae h03sytor?

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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 itmin 58c wc d)v.hzy ,kff)au*/ is connected to a 12.0-V battery. How m))niy uc/zkc5.m*d ffah, vw8uch 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 charged so that it stooex:hr:p2jsz9+ s mw2res $2.0 \times 10^{-3} \; J$ 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 consx-8me(yu g bxyn/(9 aeists 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 area 29 ((i 0 ln,ro un jcfez5yj8x*eyio.w$1.5 \times 10^{-4} \; m^{2}$ 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 con 3f0f :sq9:c,cukxi hwsists 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 constructedikn fq)65fiu46 g;pn o 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 constructw(fms* :rq:qh/3u+pipfbso 9 ed 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 connes :r*)k3xwopyfy+kz +cted to a 50-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 dielecyf 3zrs)x w*:+koy+p ktric 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 connec9:/hjya;dl8 wf6u s wvted to a 50-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 constan6:j;w / 8lavh9 fwsduyt of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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