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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 ;p,spb6 s5t eua 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 is 3s kiivhggs./ a )2pc(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 their surroundings. Objec+ f0ga1nazpl9 d jq:8zt A has a net charge of excess electrons. Objepa+naj0 gd 18zf:lz9qct 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 d/4l7hrse* pysdn 4wiy .w* ;qtirection 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 directkfb*)fjj96qk.d:d xv(a +euxe 61 frqion 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 conducte32qk8+t.)z qoaklhk ing 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 ball3 8o/3vzi+b kd0ecr kb is accelerated from rest to a speed v by a 500 V potential difference. If the potential diovi 8 b3k0+rcbdk3z e/fference 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 pote, tzc; pz61lrl h1*sjtntial 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 poinvkabz1orzy;v9urv 18l + f. k+t A to point B along an equipotential surface.vzzfr;o k9181vl+rkyuba .+v

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surf7q s8 -awxqwg+q.t9t face 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 carryi:zcjnw, 15 ising a charge equal to that on the electron as a result of moving through a potential differez5ci,sj:wn1 ince 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 un(r:pnd1a p( jtit 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 corres 60e wb(-wgtzttfo 5t0ponds 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 distb b; jkq +2gj5n;u b2c9wwg n-* vh0y*vk4awxlance of 2.0 m from a positive point charge is 100 V. What is the absolute potnk akyj29 4+;hwwbwc 5 jbvn2b qglu0gxv;-**ential 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 negative(hqiuc tog45hcuw;ff 2.ba * 9 point charge is -100 V. What hi wqahc 2.uf(o5 ; ct9gbf4*uis the absolute 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 chcql1ibk (.a 7-seice6arge of +Q is located at one of the square's corners. What is the absolute potential a c(.s ebk76iq1li ec-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 center of a square is 3.0 V when a charge of +Q isjg 1. 0ipjoq e0kn/y(d located at one of the square's corners. What is the absolute potential at thed0j/p io1k0yjeqn(g. 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 chargez l4;9xlcxy+ xs 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 ik qbvn7-34izo s 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 identical in every)m grqhv;m.0q ic(g 9l respect except that one has twice the plate area of ( clvqqhim0.9g);mg rthe 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 th;3szf x*w1c/p esu : (b-wx5dmwumqd0e plates is doubled and the distance between the plates is halved, what is thb*(:ud/0qeus3xxfwm5 dc-1spm w zw ;e 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-plat z)sl f5th.nca7yrff ;z54uf6 e capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the pot5a)7 h4f y;czft5z6 unfsfr.l ential 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 capacitor is wti0oq:ay xw0 (eakened, the capot0a: ixqy( w0acitance 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-plate capacitor are maintained with constant vpn r:cgswz17+t ldf.*oltage by a battery as they are pulled apart. During this process, the amount *wg:zrcf7d . ls1pt+nof 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 ma/keef+:rf g 1jx( lsi0-xf k,fintained with constant voltage by a battery as they are p(-g xis,f/ jf01 r +kxefl:kefulled apart. What happens 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 for addingp:xvh ./lb1c f0i8q cg a dielectric material between the plates of a capacitpvql0.:fg h b8x/1icc or.
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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 zu l08z;q ij4bgrj3z7paper is placed between the plates of a capacitor. Wha3z;il 0gzr8 b7zj u4jqt 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 paper is placed between the plates of a : lxpyf;lt3vh o6; uy4capacitor holding a fixed charge. What happens to the electric field between the plates?v3l;y4l6ot ;up:fhxy

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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 c+esl 147b pu o*v8xjk4.btqudonnected to a battery and becomes fully charged. The capacitor is then disconnected, ax.b4qut 7o1uved* 4kj bl p8s+nd 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 cadh avd;;awb;ji2ypw(9 k36 ntuses the energy stored in thk th(vawy; 2wj6p3nd9a;;i db at capacitor 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 stol1;5z0 .nu 8 p,6btwxo63- xmozbu toiz5fjoured in that capa-1 b;z5zzu u6pxj,o mo6o 5. tul8n3ofxibt0wcitor 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 t(,omr4qd rt5ao move 10 C of charge from point A to point B. What is the potential difference ,q54ro(amt drbetween 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 elec l4 pbwj34g6dbrg(u1*h-h2spm)vc7rr2 dl ibtron from point A, where the potential is -50 V, to point6gb-lb dswup g v2* (hjrb74md ricr3l 14h)p2 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 electric potential differeza,xb2dnfen t-epmf3 1u2b i-9m 4,bence of 500 V. What is the kinetic energa4f ,feim 2,m23 b1-pe nuxebndbtz -9y 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 atnc6 2fo;idw 1s rest, is accelerated through an electric potential differ6f ;2 cndisw1oence of 500 V. What 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 e4ulfa r2y;,iof 1200 V. Whai;4e2fyr ,a lut speed does 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 do in movi8x)f o 0x:ejwa0gcfc1 ng $8.5 \times 10^{18} \; electrons$?

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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 500 c i fq*;p er4a31-kfe(h+ yiulV. What is the velocity of the elek 1* clhyupaq4+ir;(fee3 fi- ctron 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 accelerated from rest t4egaiipkp hu 8e58 f mu+slb,f ;71ii)hrough a potential difference, and afterward the ball is moving at 2.0 m/s. What iiuil8h)fa 5pbik ug p8+,;e74 simf1e s 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 th ln-g+ x.hj-e(z emjq(e electrical potential difference between two parallenzj-x - (l q(jhe+me.gl metal plates 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, with a magnitude of 500 V/m, is directed parallelmg4lr u ot:79nilf(4hbu:tq( to the +x axis. If the potentb44 nlo( :7(mt:9fqurl uti hgial 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 ov -h:z y3,9 )i5qfkgaqe md(oeast. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly west of that poinq95i khd-,) qmzv:gaoeoy( 3ft?

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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 3.kb8pif54+ 2hvr amf:o 0 V/m. What is the change in kine 5v fbm8rio: +pahf42ktic 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 iqors(:4f:ext7t.sxlzrpg s/efs6 (4 r -t*d12-V battery. An electron relea4zs/67qot sl.gesif dr 4(efrr::(-x xpt*tssed 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 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. An62g9c4yf de 1f(viqid electron released from rest at a location 0.10 m from the negative plate. When the electrof2ivy1(ed 4diq6gc9 f n 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,yb8,p -txs3l s are connected to a 12-V battery. An electron released from rest at a locationslp83y- tb,xs 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 electr1c8ypb5y - ceyic field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given poicbp8yy ce- 15ynt 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 the east. pcg9k n;xq26hIf the voltage measurenqk 9cp6;ghx 2d 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 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 whdse7/i3 -3oyi.)p oeq ysaga ; 3duqsb1; 8mV, it will acquire a kinetic energy (in the absence of friction) 3y;e;wahidob1)s3p. 3o8e -yg us/dqma sq7 iof

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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 distas .ek55y4q0:njumy8q + w-bm c4mglapnce 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. Find the electri- ;kv1*nrg5,f,vt m p:k zuufr+xi+wgcal potential for the center t5 xz*wr+k1 ,;g pg:u-n,urmffivk+vof 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 i rk7(c6drl3 pzs at (3.0 m, 0). If the potential is taken to be zero at infinity, (rd p73rc6k zlwhat 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 -28ehcv bmi:s7 n yl857 b;qsuz,.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 z7sy 5shqn: ;c8buv,eil b87m 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 th23+9yifmqqn ax:p7f the potential is taken to be zero at infinity, what is the woxq3imp9 +f2 7ytna:qh rk 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 ofhenv0(e ncc ua* 2l45y a rectangle of sides a and b. What is the potential at the e(n*cl5ne ychu va204 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 + u::c-h2o2e/rq;j xsy ha sqy/4.0 mC are placed in two diagonally opposite corners. In th a2:;sox -:ec yhju/ry/sqq2he 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 (charg,vjl cq /lao-0 l2ep*ge +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 placey*4.oee wxots3u1 d rc0t2 ,ky three charges, each of 2.0 mC, at the corners of a,y 4ecos*uwd y0e3k1. oxtt2r n 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 the plates of a 2.0-mF capacitor0if k-t49qk ad;iu6jt when it is charged to 100 Vd -i k;u6t0 ajf4q9tik?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacif(m3j budf+: xvzl36 .wjsl*x8adey(tor 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, and the plates are seerc6r10a :n qazw9i8 fparated by 0.050 mm. If the capacitance is 17.3 pF, wha 0rcfi:anrq8 916eazwt 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 of aha+sy+xqh-mj lp e17 ge,c,o5 y* 2wlprea $0.20 \; m^{2}$ 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(fdp616hn/r1rjt:5 z8 s lkw7s bx kkf the potential difference between the plates is 2000 V, with the top plate at the higher potential, what s61 h67rpdklw5t (nkb/sjf8zfxk 1:r 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 a 100-V battery. :28vhxmo;ae. c)xlo1kclujfd -1uxul b(9j +After the battery fully28mluax k:xc;. fv 1ujou b hl)9jd1e+ -xolc( charges the capacitor, the capacitor 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 capacitor. How much2 -.djkzk5vy b energy is stored in th.v-k 2zjyb5dk e 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. ) +) 7rr7uy-6zmu nyuomsb ,os What is the energy stored in the capacito+mm 6rb)ou,zy7rs-)un7y s uo 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 floc1 .a0(s nbsdqob eh0kj)-d.f ws onto the plates of a capacitor when it is connected to a 12.0-V b saqej d( 0b)cksdh.f1.-o bn0attery. 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 charge(dvj/: mdhb w(da9rd7enp:, bd so 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 capacitor consists of plates of a og,z0kka- vy;rea $1.5 \times 10^{-4} \; m^{2}$ 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 )ihig,.am: br 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 3mb) 1 neh(ep3jx)ep sc 3wa+jplates 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 plate areal90 d 2scsc7bb;y 8qx-lmfy/y 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 ic,; txliwm a*-nf(8ofs 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 a 50-V battery awiq0fr on p5hnqk5ie 61c3e)mm-3,j w nd 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 3wpq6fo-inj w)3kih nrc50em51e, mq5.0, 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 sg6yp, /oi x,p,5ebk +/9zzuqyiy2ngcharged. 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 voltage across the capacitor's plates after the sl2ze9+pbuinq ,, gygs,/ yoiyzk/ 5 p6xab is inserted?

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