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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 nx/qehisqo -r)-*:7h, ih lipuot 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 irt(av a,+ k 25/pggaabs 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 fromri* jr( xx1ati 9q2nj;kh-e2i their surroundings. Object A has a ne r k*jtn1-92;i hrejixx2aiq (t charge of excess 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 / 1q4v bt3mulxthe direction 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 d 4v4 tt44tjxqsirection 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 cw ;-n+kie2i5vi5ttvyg xz r (uos 8(o2onducting 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 wy*65wf71-b;k kgmx. lzo/ j*uogu 7c fgjc4urest to a speed v by a 500 V potential difference. If the potential difference*cljb4z-ofou5jwkgx um77gc; g u/f *61w y k. 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 )t :,wgsx:wpa f665g,)sr8 ksfsac ffpoints 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 95j;qbwff)huB along an equipotential surfac;5)f wjuhbfq9e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mxg8);suez.y g js)id:t l;t8aeavr()ust 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 charge equal to that*d9kgr+)rmny9kxm: 5h9 p yfl on the electron as a result of moving through a potential difference of 5rykmp9ym*dh:n gr)lxfk9+ 9one 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 us8/2y+ulyriuh )* :tv jqh 13blz uv:anit 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 correspow2b(k7o ji j*hnds 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 chargk yhq2(y8,/ vj lsomo/e is 100 V. What is the absolute pote /sjk(hqyo,m2o8 lv/yntial 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 rwoe .iv 9my-st+p )/bat a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point chs/+b.w-ot rep) mivy9arge?

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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. cx pa6n87jm5oov:2s n0 V when a charge of +Q is located at one of the square's corners. Whatxscam675n8: v j2opno 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 1 *caeo :cd2wrcenter 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 ce:2* ac1ceodr wnter 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 0z7d v(kuf rn/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 voltx,pw ynyl 8 +caa;xhgh+50l1 r is 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 capa4,ojg2b4 xuoocitors are identical in every respect except that one has twice the plate area of the other. If b4uo 4go, jox2the 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 capavm1z )h0tufrpd0 u,)c citor has a capacitance of C. If the area of the plates is doubled and thc)r1uu, vz)t0mfd p0he distance 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 and then is reytsp ybko7 74:moved. The plates are:sk4by7ot 7py immediately pulled 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 ca,jc h;p;fu u/dpacitor is weakened, the c;;uc, /fdjuh papacitance 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 parallelnk a 4,t 6fxy/cio;v 1zta,5gv-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. Duringzty/t1 4ca,v5x,k;nf6ivo ga 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 cap(2 cvl)dbug7j acitor are maintained with constant voltage by a battery as they are pulled apart. What happens to2 bu(j)7gvcld 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 for adding a dielectric materi;jvqf 9x f)e)f ;3e0el3kql nlal between the plates of a capacite3j q)f q 0kxn;l3vlf l;fee)9or.
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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 betwee6bkhsp fp* /.n ch2w0sn the plates of a capacitor. What happens to the capacitance?f*0/bh 6wcp.ph kn2s s

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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 papaupris8 m29nag5ym8 gl 2-kb 7, pg(mker is placed between the plates of a capacitor holding a fixed charge. What happens to thg(pmbgnugs2 - a,mr8 p 8k25kiam7 l9ye 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 ba-2g8ug3 bq qr4 msl25ji1wu okttery and becomes fully charged. The capacitor is then discu5gqguk1o3m2 rs -w i 4l2jqb8onnected, 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 charge cauw(: 5qu3ariir ses the energy stored in that a5r 3:rqiui( wcapacitor 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 cauno 5pw0bs9t qxriu2 2p2w3*.yx3u dxpses the energy stored in that capacitoxi9rw320qxd p2b ns* 3u p.owyu25t xpr 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 point A to point B. kyqn/ 0-fz,b l What is the potential difference between points A andf/nk-z0 yq,lb 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 elecci2hh ry6 lxx8en20s 4tron from point A, where the potential is -50 V,8 cxlyesh26 4xhir20n 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 restbf4de. je( 7i sucz m;hs*6l,u, is accelerated through an electric potential difference of 500 V. What is the kinetic energyl u., js6h;icmf u4szed(eb*7 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 electric potential diffek) xoqifz1x0.aw4 wq/elc( y p33/zgz0cjw *zrence of 500 V. What is the spqz3 a0exoz/4ccyw wizjlg.( k1 / wf)3*q0xpz eed 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 dmjos)k;gf3+edna )t.3tx)n wifference of 1200 V. What speed does it acquire.; k)t g)jd+ n xnmoefa)33wst?

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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 sx5;y d*9aznuo3,igvdo 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 throualoja(h7r*c8( nkn pp w v3j.q9a *w-ngh a potential difference of 500 V. Wk n9h .-(a v(*a3w ncl*pwpjr7a qn8ojhat 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,v6 mx3 pk.0y- su1sj cbvaet:do0k5f accelerated from rest through a potential d tb01m f eakpso:v0- uv36sdjy5c, .kxifference, 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 eleo7zge0a1c. rf ctrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric f1re go07czfa. ield 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 tx)pk/7e;yas* kbgwii(v6w2 bl e3t+fo the +x axis. If the potential k v2wt kab li;b36seypxe 7+*)f(/giwat 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 of 50 N/C directed toi7 hx+yt o7:8w;uqwboward the east. If the voltage measured relative to ground at a given point is 80 V, what is the vol y+i:h77wtxuw;o 8qb otage 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 electrichxz.3ho4q - i9lu1ifk field of magnitude 3.0 V/m. What is the change-4fhzxqu. l91o 3khii 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,5 8adux1uiu9do(/ qci separated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from td/8xui9a qi c(15 duuohe 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, se2 3eerq goy/6n0do )n)xydoe4parated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location yern6o)ny3od)0/xdqo 4g e2 e0.10 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?

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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 connect2nhp 5fqnoaimg+ ),7ged to a 12-V battery. An electron released from rest at a location 0.10 m,ipn ofg 2 g5h+amnq)7 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 50 N/C directed toward the east. ;/k3j 6xuo*g3p xbahe If the voltage measured relativ*g;xekh3o3ubx j/p6 ae to ground 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 trvs/ a)+sqt 9she east. If the voltage measured relat qts/va+s9)rsive 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 div+qw h8.x9pglr1cd m) fference of 12 V, it will acquire a kinetic enhgm)xr8 l+.9cq1wdp v ergy (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 n 0zjmemlz3 ;o/8bu 1zat 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 enn;qx*u+ a mzt-ds of a meter stick. Find the electrical potential for -um *aznx; qt+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 (38*p3qxvn.5y syzxys71es w5k9 js 4uu.0 m, 0). If the potential is taken to be zero at inpswvx z5.s9xk7 u53n*sy8suqej 41 y yfinity, 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 (0e uvaj0a)vxxn+t -d-0m) /mkc, 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 electric potential energy of a 1.0-nC charge at point (0, 4.0 mkn d-)m0x axj vau+ e/)tmc0v-)?

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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). If the pob2b*jih/f d5*mdu -ag1gd 9xntential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity t xdiugf1b9bm2jn5dg /d-a* h*o 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 gih4jxg x q yse7l7,:t322av wa rectangle of sides a and b. What is the potential at theyx7:vj4q2gxw,isl a7 t23h ge 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. Charges8pmj8 s6 ljnm60dql/b:j6t lm of +4.0 mC are placed in two diagonally opposite corners.m6pm lt68/qjbn60 8s j:j lldm 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 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 +,w k10*nwf xdf6p8j 9l i1pnhn :ul0cu2e, 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, each oe,e,b4u2 ev naq ink (x)u+9jdf 2.0 mC, at the corners of an equilateral triangle of side 2.0kq2 d4eee ,(inu x a+n,)9jvub 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 oztcc*+1u r b7zzg gj26n the plates of a 2.0-mF capacitor when it is charged to 100 V?z6u 1*ggcz +bcr7j2zt

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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 hmmitulf 4* ( 8kxyg0e3as 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 the platm -wld aed:)09h6h3z (zeh eqves are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate 0 6h(zmd: elhheqd9-za3 )v wearea?

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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 elg0;x.jtbgwjc,b yu/8kihz b ;wr k52*d;)b 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 separaa1mgpn n -*q8hgexbg /n5h30 htion of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is thex*/ g0gm5ne -h8hbqn3a1np hg 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 sb lb+y/0cyn6connected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in t +s y06bnylb/cransformer 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 16.,t adjf(1qyde ba*1a sm d f7n3s(ee5 mF capacitor. How much energy is stored in the capacitor?dady*(1ss,maq.j at efe ndb7(16 fe3

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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 las5f5 z3ygs )s d)nz/ c66djqenergy stored in the capaci5/53s)fjdg dlzqs )a 6yzn sc6tor?

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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 plkw tx9x5 nct7ns )f-bj)euw/*ates of a capacitor when it is connected to a 12.0-V battery. How much work was dj-*wx5k e/ t9fwbsnn7)x)tcuone 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 thaqcwy z( j,,9iqt 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 plates of g hlb-x9-ai0ff.r;d /m8wzhs 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 d8r fwuyqw cnjj5 -xg 81(t:p*$1.5 \times 10^{-4} \; m^{2}$ 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 capacitoryp+ey.;(*y v l gzuq2u 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 constructed with pcp6yn;aq pn;3tw+d ,u,bv3 oa late 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 plate area of uy),/ 2hz+vbgpyy e4t$0.40 \; m^{2}$ 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 w/q-*u5iu psh connected to a 50-V battery and becomes fully charged. The-i5qw p*uhsu / 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 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 batteml ji 5x52*mspry 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 dielecjsmm5 x2ip*5 ltric 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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