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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 followiv17;dsy,wc vxng is 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 coulomb ti j56 f-hwb.sis 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 insul0 gqaerp y::xkfnfoo 06;mu1; ated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is atmx:uake; pqr0ongyof ;f1:60 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 di:2oh-4 why qilrection 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 direction opposite to the electric fipk;/d/1 k 0ov dmh1vnjeld

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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 oio vg-j1e8xx3hn aqj62e-1 gn18yadv n a hollow 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 from7peh3 jlc2z fj3zm2yp(se8m2ck1 8aw-qsr . z rest to a speed v by a 500 V potential differesj j(33z8ahk2 1q- e2zrlcs. 2m ywempfz78cpnce. If 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 h /hh o:vr(31ph. r8k qrn5tcxreferred 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 pointsq o*y.*fwl:akw2,na A to point B along an equipotential surface.*wa2a :w oql*.,nsfky

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface7mckn8z d )l*(mbo2zy 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 charge equal to that on thwu8 lup1ag w/:e electron as a result of moving through a potential difference of one volt is rw1gw/u p ul8a:eferred 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 01 ldkd6k1nh/vdmk k: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 corre*el ymm j+4-phpn; 8g8z d4pfgsponds 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 ofn8d9u n8zbew; 2.0 m from a positive point charge is 100 V. What is the absolutw9bun;88z nede potential 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 ao:ce vuen2ca -y*i26zlq.0o ot a distance of 2.0 m from a negative point charge is -100 V. What is the abs*i:ao-zo0 yeo.26qv c n2lceuolute potential 4.0 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 center of a square is 3.0 V when a chae89ept*1a5o yhh fx: erge of +Q is located at one of the square's corne :h5apoxfy9e e* th8e1rs. What 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 centeqo8(98aw5gs u 6pbvbf r of a square is 3.0 V when a charge of +Q is located at one of the squa8vug6abo5 bf9p 8 (wsqre's corners. What is the absolute 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 of two charges that g2/z lah)+wpr2ffif 7 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 voltmzm ;we,6p,h7sd+ :bfk kou-o 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 ix12(dauuy6y/-yyj c70 mng*ci8apb tdentical in every respect except that one has twice the plate area of 2 m6/a uy ciyxp t7*b(yg u8cdnj-10yathe 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 capa dr8s2h1)wne fcitor has a capacitance of C. If the area of the plates is doubled and dhe12ns )wf8r 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-plate capacitor fullf;jrjsj, (9, n j4txq z.szwd: z/ide.y and then is removed. The plates are immediately pulled d;zqw/rj .en tjjz .(4ds jfx9z s,i,: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 kn:s. d+apn( ua given capacitor is weakened, the capacitance+ .u:s(pa nnkd 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-plat c*tzdm0sz, 2aufi i*1e capacitor are maintained with constant voltage by a battery as they are pulled apart. During thiit*uif*a sm2, c zzd01s 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 maintained with consty ytafe,- b.,jak. 5;sh+iheyant voltage by a battery as they are pulled apart. What happens to the strength of the electric field da t+ehej-fbks. ih.y, ;5 yy,auring 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 dielesc9-p y5jvxbx6vtce 8v2xg 8zb:(w6gctric material between the plates of a capacito6v s t cj-xyb6x ( vxg8cw:95pze8gv2br.
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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 x6l gpa*ig3/ba capacitor. What happens to the capacitance?ax g*/i3b6lgp

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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 plat+y:dlxf itx+ m.8ztyi 6+/ntg es of a capacitor holding a fixed charge. What happens toy nfx6t8+tdlz.i m:+i/ xg+yt 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.6 f n uqo/:t3 v3e))sqv.xhuno The capacitor is then disconnected, and the separation between the plates is incre)x:ohu.u6 vv)nn/ 3 otq3fqseased 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 cs 0n(nuuw b(2iapacitor holding a constant charge causes the energy stored in that capacitbws(u in0(nu2or 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 cau44w)*maerot zm la h35ses the energy stored in that capacitor t t 4a54 *r)zamhmwe3loo

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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 m v qdr/u( )bsr:n7ssarsbyn2)m37aqwr -c 4 8A to point B. What is the potential sswbra:)8mun7) q ay/ rq 47cssr-( 23 nrdbvmdifference 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 frol2lb j3wg8g/dm point A, where the potential is -50 V, to po3j8g wd lbg/l2int 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 ektej ;/b w kbjas*. 4.1jikry8lectric potential difference of 500 V. Whaby.4kw1jjke ib t. ak/s8*; jrt 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 electric potential dik 2h ao8ckqxoa8g,d8-fference of 500 V. What is the speed of the prokdohxgo,8kc2 8 q8a a-ton?

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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 prg2 v( ;;txbeoroton falls through a potential difference of 1200 V. What speed does vb(xo 2 e;;gtrit 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 i n7q6mu /udlt9n 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 difference of 500xmmr(z*a3mqmg* n4 n, V. What is thm m(r mq,x4 3*z*ganmne 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 aroj ts cl;s/ k2ll624xccelerated from rest through a potential difference, and afterward the ball is 2s /l l4x;rklt sc62ojmoving 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 difference between two parall/ tryrbl-ie;ob l,/ v+el metal plates separated by 1.0 me bollrv;/b/+ t,yir -m. 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, with a magnitude of 500 V/m, is directed pabt4a gk) zi5k3j.9y1av8 qerd rallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is th3k1b8t 4.iqaajr g5zdk)9e yve 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 east.5bomtaz)-z i l*j+ p8j If the voltage measured relative to ground at a given point is 80 V, what is the voltage attj+mzpza i -o j)b5*8l 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 38bagc:v llum 9ju1w (3.0 V/m. What is the change in kinetic:9amuuvgb c (1j38 wll 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 battec2(t2wnk1 rc5kanq a2*7xvq,dd r,ylry. 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 potential difference between the initial and fina5, v2cdrk2k*aqanq,rn 7 2t 1(cy wdxll 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, ses.q;0ef7 ( jidvlsyoae*/r /b i sm+m1parated by 0.20 m, are connected to a 12-V battery. An electron releasedom li1 bs0/q*eisam +(/vsf;e7.r j dy 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, 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. q;25cj,8c vqvap j+8( wtxgygAn 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 is the spee,vwt+8jy apv (jcqq5ggx ; c28d 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 c8m;ubpuzo/s-0d iybnk77 ;s 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 the80buub n-s;zk oc7 7p;iys/dm 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 ele5b aqt /s.j3qd,ftsg1ctric 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 voltage at a point 1.0 m directly south of t1 dq. btt/s3qgjf5as ,hat 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 Vk7k7 l;iyz3zb5gyc* u, it will acquire a kinetic energy (iniz7ug5*l;zc ky7k y3b 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 distance off:m6x gj7btp7s k 6*ag $5.0 \times 10^{-10} \; m$ 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 meterbdninv j1x. g-h2 30g5hyul(f,tzwa. stick. Find the electrical potential for the center of the meter st3hnwif2.,duy hbnl ag-xjt5( gv.z1 0 ick.

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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((g*f2mz6u mboi t0gs (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4.fos( g( u mgz*bim2t600 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 charge1kuz9xdvv eis6 r4 5qy.t qj05 is at (3.0 m, 0). If the potentj5k5yv0di. 4te6su9rqzq vx 1ial is taken to be zero at infinity, what 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 charge is at (3.0 m, 0). I(ew. dun-pwt2f the potential is taken to be zertd(ue2p- .nwwo 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 c ,y ( (xf4sglv wssik)5,hmbf4harge +q are placed at the corners of a rectangle of sides a and b4 (y)sgklvm wix fbh,f5( ,ss4. What is 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 s4/ bhsim5prxap, t;b+b7 du x:ide. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of/4:x,u5;ti mrshbab p7 p+d bx +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 (c4 5(vyun rro *bvk(:ntharge +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 necessary to place thrqtga,fd0v 5w9hx2f b0ee charges, each of 2.0 mC, at the corners of an equilateral q52vdt0 b,9hf0agwx ftriangle 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 2c4n pwsxaze:1q ,n+7ek1h-g f .0-mF capacitor when it is charged to 100 Vk z:ag11wnfsn+c7h,4p -eeq x ?

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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 area2piwsw- cs7ny 7j)5 s 7w-pa f0kzlwl: $0.50 \; m^{2}$ 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,1 q3od +zc *h;houoy8m and the plates are separated by 0.050 mm. If the capaciuhc*mzy;o oh1q+ 83o dtance 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 plates 7ji0qq4 7mans 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 5.0kv*fpu (js5 2s cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric jkf2 v 5s(sup*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 a 100-V battery. After the battery f *yapol:pji m;t 46.nbully charges the capacitor, the capacitor is immerlba timo*pn6;p. :4yj sed 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 capacitor. How much sc x1 5f1bbju7energy is stored in the xjcb17us fb51capacitor?

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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 9-ex ,+.iskcwmqu(ikkk+ z)kthe energy stored in the capacitow-,sk kum eik zcki+9q(k)+ x.r?

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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 :4q bkyp/o/1:k8v kevgb dog) fyc 4n86lufl;flows onto the plates of a capacitor when it is connected to a 12)k84k/4opoqb 8ef;n6g /flg:buvd:k1 vy cl y.0-V battery. How much 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 iy2hksc q9fdb5rr 24,gt 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 xa/ s 7*r e7jk5udcac0f f8kg n:jnj)*q+yk/qconsists 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 pl;p(jp+lladm8 ates 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 plate2.7-tx sbi6mz6r f6cg ppqxg6s 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 plate2g7luq0aj:v y 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 wlsd5av7orwh 2 ,tu 5+xvb,1 ggpx*3yfith 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-z09 j):r5ms( mg3b.xauyr aj mV 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 capacitance of the capacitor after the slab is inse ):myra0z9.m grma xu 3s5bj(jrted?

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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 becomesv8sh5hsbe0nrsr ;- e8 fully charged. The battery is removed and a v 8- se 0bsrshr8e5h;nslab 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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