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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 a vecto4cwwf4ob +.4zz mq)6vna0l(o 2p4ysbzz(ao wr?

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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 94;ukz :zbyr,1 zvnjp 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 )2*vz:s*/m3dal ov rkdazin* are insulated from their surroundings. Object A z* kar23i* d )sn:*/dozlmvva has a net 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 the direction of thegac 5+a*o)mj+kc, hkb 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 p +ti43hir 7nudirection 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 hp+ kzs p:qb7v/6k7cnh v )hg0g .mihf.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 500 V potent6qrati 1li r+.znwbw2qy x(--ial difference. If the potential difference is changed to 2000 V, what will the new speed of (iq6tnxw1 la-y zwb-r. 2r q+ithe 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 poinel7gu: 5 k jmxt i p.i8jo5b6flcd2c*+ts 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 equipotentialo.h5fg cl9k 0l surfac0.fgk95cll ho e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfax :fd y83z2 ormawsb;(ce 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 cak h1cr:1tpju :nurkn. , o9*egrrying a charge equal to that on the electron as a result of moving through a potential difference of onejrt.1 :1ck9p*ur oenk un gh:, 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 3+ /-nmz y+pfb,a seraa unit 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 correspz9)fwaqi.v8yfhad k2u2 9cp 8onds 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 dist0pph6d*.*v- ve o flpw z95ayjance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the samep* l wpyo6h.p9eva-d *fzjv50 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 negatiw4gr qts9u1 h6s)l4 n26fave xve point charge is -100 V. What is the absolute potential 4.0 m away from the sam s2f4s)6le q6nvr41hx aw9utge 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 th1zlx a 8uv,5lx59( zk0lqzxrv e exact 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 is also fil 155 z,vqvlx lluz0xxr (8kza9led 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 ismo 9w bdnm5-v3e 69ckk 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'-kc6debkm5v93w 9 onm 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 chamh;of4xtg u1bd -m39 lrges 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 voltim,nk. (nrn.rdh5gc ; 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 capacitors are ident( c1dzfog(e q a:asr:+ical in every respect except that one has twice the plate area sdgq:a o1e(+cfza( r: 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 thfyr854j ara2 le area of the plates is doubledj58 l a4f2rayr and the 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-31wvm m-jokx8 plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amoun 8m3o-w mkjvx1t 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 plat8.aqgdi7g/ t tcnr j76es of a given capacitor is weakened, the capacitance of thatnq gj6 rt.acg8/t 77id 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 maintai */ga tfwa0ksin mg4q4c+sl* 1ned with constant voltage by a batteg*q is1wncs0k4 mf+*4ata/ glry as they are pulled 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;-)t5 za zfdrd capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field d- azdzd;5t) fruring 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 between theb)vrp)r(dg:il zx 0c6zik c 0, plates of a capacibvr:, i(60)zir)pld gk0xczctor.
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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 papkdx .1d tfzs )ptmg/89er is placed between the plates of a capacitor. What happens to the catmpz. sgdtf)/18x9d kpacitance?

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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 cak0.d9uq hmg6 ,;k oj/su7ret bpacitor holding a fixed charge. What happens tds.eq/7t0j;kb rh um,ok 6 9ugo 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 i7p1* . pxjqutds connected to a battery 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 energy stored in this capacitor q1djt*p7up .xhas

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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 thu6zt+qjkiz v0kjig-; -h9q v5 e energy stored in that capacitort0hi6 ;q9jkzv +k -iqgu-j5zv 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 s0 dd 4fd9h,v/tur:q yqr -t4xstored in that ca y/ds u tr4x,q-94fd vqrhdt0:pacitor 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 pu y0yz5gndbk vy.m1)( oint A to point B. What is the potential difference bet.b05y1nvm y(y gkzu d)ween 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 3:wzzvm ywjoh(l6) ( epotential is -50 V, to point B, h6ww:vm zyozl(je)(3where 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 acced+ql w cuu:r2ar; +soiof:v9 .ep; -hrlerated through an electric potential difference of 500 V. What is the kinetic energy of the prot: uuv-ro:e;f+ id;p 29 rc+hlrw.a oqson?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially aub rgqsmmw(fy-iuhu 6:/5 10ut rest, is accelerated through an electric potential difference of 500 V. Wmyrq5sibmu h- wg10u(u /6 uf:hat 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 s q.fjq,1yz (iytu(v .potential difference of 1200 V. What speed does it1ivfys( (zu. y,qt jq. 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 mrpr( oje .6*kiur 2j5soving $8.5 \times 10^{18} \; electrons$?

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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 tc1 /ul es* ep5hny/hbi1h1:q difference of 500 V. What is the velocity of the elnl /q1 hyhe*cih/115se : utpbectron 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 objec nq9j2c-u0j/)qa0u v8k j esast is accelerated from rest through a pjuj)s 8quk0vjcn0ase q-92a /otential 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 potential diffegg bmjx (7p.v/6wqmmqk8+i c4rence between two parallel metal plates separated by 1.0 mm. What is the electric field between the platm6 q48m v.xq+ (jcb7/gk iwpmges?

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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 directklxe0)y j+n5q (su o0pup,j-d+7zlw ked parallel to the +x axis.( kle+k0sln wz-)uxj7p5+oydj0 ,pu q 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 of 50 N/C directed toward the e, b23w6kbrnpk1x *zitast. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at azkp, 6t 23*xb1 kwbirn 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 m0hbh j(:jc1c,d l ye 2npow0b,agnitude 3.0 V/m. What is thepyhjhwd: 1 b(l20cbjn,e0c , o change 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 m, are connected to a 12-y8sfs4u e vqr0,4id 0mj q3b)jV battery. An electron released fr s43eu8b)4qyjs,0 mvqr d0 ifjom 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 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, sejto:ts p87 j)ne 9p+tf9kke)v parated 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 electr+tk)k p j)79p9 vnstt:oejfe8on 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.dumeo 7f (-gdnp63 ,pd20 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 oednpdu -6g,(fm 3d7parrives 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 tow a6 sq-i93icnoard 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 3i-qa6inosc9 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 9n ii18fmj)ljq5lz x4ctric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a jlz j5 mx i)lnif1489qgiven 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 potenttvt1 u( 67jkkq/tuir4 ial difference of 12 V, it will acquire a kinetic energy (in the absence ofut/4ttiu 7r6 ( 1kqkvj 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 distance r64vq;kl 0 b-mt/eukmh g fq61of $5.0 \times 10^{-10} \; m$ 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 arp 3g52 gat:kuir lj l9tr.0;mhe at the ends of a meter stick. Find the electrical potential for the center of tg : ;2a03riphjrk. 9gtl5tumlhe 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 isbngm .po ,+*r(;bay vp at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential apvy.b,b *np+;grm(o 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 chap 47y9uwh4o)f+2ko l gseegx3wnt,8arge is at (3.0 m, 0). If the potential is taken to be zero at infinity, whats pw2n3 4wo)a gehyltxg47 fo9u8+,k e 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,e((/ olmrlwb charge is at (3.0 m, 0). If the potential is taken to be omel(r / b(,wlzero 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 rectanglo siba4bdd pl :n ;;yyj-9wn57e of sides a and b. What is the potentib;ajnp dnwob7 ys;9-5d iyl4: al 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 diagonalo 8-7a/rrosd.x4ad0 jpc ga5 yly opposite corners. In the other two corners are pl7 co/ jo0d8ap4r. 5a -axsdgryaced 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 +2ps +0vmg()aio r:ww-89vclqws; hs c:e, 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 chargeso6 l 6;ed5 ,x3hotv v hc5;clruhme0.q, each of 2.0 mC, at the corne 6dlvehu.crv q;o;hol3m6 c h55,e0txrs of an equilateral 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 thd 951db7leff te plates of a 2.0-mF capacitor when it is charged to 100 Vdf blt579df e1?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capt gp-l2qkk81 aacitor has 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, an (+fq :q6ry mp;ybsxa(d the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is thea yxqs;6 f:(( qmb+yrp 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 capacitoiqa60 qm.gwwqv9c t:)r 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 cm. If the potu2k :dt.sce)j8q d/jfg.3 wm5d( rj tpential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric fie.3 :5t rpfsjeu q8gtd (wjc2)djdk./mld 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 a 100-V battery. After theig/: bhtqn;t+ battery fully charges the capacitor, the capaci+ti:/hbt gnq;tor 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 capacitvj*av:;nazf2d ,zq i)or. How much energy is stored in thezj,zqnf) ;i *: davva2 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 capacitor. What is.9qtw6jbaw/ cs d9 2ls the energy stored in the capacittscdw692bws a j9q./ lor?

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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 f560qwp -x 2r xs4tbuldlr0(ges- :qk qlows onto the plates of a capacitor when it is connected to a 12.0-V battery. How muchxst rq0k gwure- qslld4x0:2qpb 6(5- 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 th7 db5dq zkhl;;dg+.fegccp b0/py* t 8at 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 plat t+x( b-+rw 7is36v zvnagyvj,es 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 capacito z ;3gd7dds-hvr 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 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 consists1:w./6z f8rtvkdg f zo 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 ii *wl 7)jedfb 8+f4kdjs constructed 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 with plate 4iu vm1kq (p/iarea 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 ao zun el*);rg(/rusz5u5.xhjhfk + ; ond becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between thrn5 f/;u 5 s(*le.+);jxoguz z rhukohe 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 battery and becomes fully ch tq ak2mu ddfs(:m+74harged. The battery is removed and:2 mf4at(dsh7u+dqmk 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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