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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 vector vh--x3ou2ji iawi2(/tkp8hb?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombwp3m h0vr :,) n n+kb3atzkp*b 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 t ;qytaw ju):8vheir surroundings. Object A has a nwqt8y:j ;u)av et 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 ur39 v )hoz gjffzen:hqef /c+*/0(dhthe 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 inab2 6ujxzi2hh+8 sx :t*ykxblp 4h.2w a direction 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 uy8:9l/wa t5d xry 8uwhollow 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 res*,u a9t5jm5axjw lufkj c-7v5ge2ai/t to a speed v by a 500 V potential difference. I9caug,7iukfx*jjl5 amv/ j -55t 2 waef 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 u;c )jge uzk*n:g),pm 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 atgw3:qv/ j-x3u8jy bq n equipotential surfacqbg j ju3w/xvq3 -t:y8e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface p4xdf,2 4rmmu-a gra6must 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 k97c afcs u9m/equal to that on the electron as a result of moving through a potenti k9fc/7s9cam ual difference 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 is2,eo+ql3mr/t 5 efrvh a 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 coqulg 2bn8 r)+xrresponds 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 2.0oj 9 ,m-e4 pcgm b;tiua2x/x1e m from a positive point charge is 100 V. pe-co,9x a4eutb/m1 2j;gimx What is the absolute 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 at l/j zpct)72xk a distance of 2.0 m from a negative point charge is -100 V. What2kt plc)7x/ jz is 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 s2j/sq-bu+f3p: h dbluquare is 3.0 V when a charge of p-hf: dq/s 3ub2lbuj ++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 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 j/b-*v(g 9oa)eo4 uvpyonu,k square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the ab jopvu 9n(oygav u) *bo/-4ek,solute 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 o;x,f2 dt64+t9 uiudm kblrp s)ww4e:h f 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 1kcm8p te-ma xzdr38dnu7 96wa

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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 ar,5jjhlllou3fs2+h0/t ,uf x re identical in every respect except that one has twice the plat+ 0hs3/ju, tlxrh2u, jll5offe area 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 +nb grk i9s+0 sfqm5yh*wr i h(zof5d35dd;t- has a capacitance of C. If the area of the plates is doubled and the distance beh0ffbhn *y-;z5sdr (w3 ritqd 955 okigs +md+tween 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 ison9t o7+ul,vwy -i8w z 4ukr8d removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates rvy8wtk i9+o4ruu 78 -dlzw,noemains 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 capacitoro-kp *l2l vh vk g(*lg)4wk(dp is weakened, the capacitance of tk)-**w gp4oghpvl vl2l((dk khat 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 voltage bvx 1l,rt6zqd+y*vyqwl30skne/s6o1 y asolz 6 vsk1 31n/l+0w6eq r,d *tqyxvy battery 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 capacitor are maintained with constant voly( )j2fx qt9 ,nifjy1atage by a battery as they are pulled apart. What happens to thefin1ay yt,) jj(fqx 29 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 material between the plates of a capoa)v23hqto33fv b r*m bq n 15m0dl)aaacitomo3h 1nq2d5)3b0 lba v*3amtfv qao)rr.
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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 platx;3a -jjynw vx19/xqtes of a capacitor. What happjyx;/vw 9xn 1-3 jatxqens 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 papero o yac5n *l:7sbqn)ygr7)a0x is placed between the plates of a capacitor holding a fixed cr n7l5yc* bygo)x) 7a:son0qa harge. What happens to 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 charg lf1 -rprx3mg i;bqcz*a.4;gdy4u m6ned. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The enczi;6um- 3r*x;.b q1m fyadpr4n4glgergy 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 cos+-evp 2uboict3/7 ca nstant charge causes the energy stored in that -b27tecv/3 o ipa+ucscapacitor 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 energqs lgj;kryf1 r ;cu vyt,/;k,3y stored in that capacitor;/jcrq fy k1,g3 ;vy; stulr,k 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 t ry 1ohik,hc2*;vw5( atx6twB. What is the potential difference between points A ,aw wr*5(c1kxht;o 6tt 2hyviand 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 poo:7hx ekqe* 4vint A, where the potential is -50 V, to poin:47ev qhexk*o t 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 elr7u, 9do x +xzkps1k2yectric potential difference of 500 V. What is the kinetic energy of the prouxs 7r 9kyk2od zp+,x1ton?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially atbspp m+04s v ovuch,xr4,r 2)n rest, is accelerated through an electric potential difference of 500,),s s0onbxvr r44 cpump +2vh 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 ofz+5sm7pcu: rx 1200 V. What speed doesc7:spr m+z5ux 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 ighy4 d3 locv:/n 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 50wekk4)+ jzoq )xi,; vv0;v zta0 V. What iovk;w+qt,)zivj0 e )4kz;ax v s 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 )rbmh);d1 y *xpr5av e20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the p x b1y*h dmvea5)rp;r)otential 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 diffezq.lujnu.cfl gyes,0 7 r859s /-nuqkrence between two parallel metal plates c,-9n/rl. que8qu.jy57f 0ugzsnkls 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 magueuto ; ps)k px31w3n9a8c.ig nitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m w guek spnx) ;31coiu.9a3t8p 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 eev5 h(ep 2g7 slfhn( 55sm5ojfast. If the voltage measured relative to ground at a given point is 80 V, what is the v5mj2fgpseo( h5l5n (hvef5 7soltage 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 electric field of ma 5c :f)r.m9xymktots /gnitude 3.0 V/m. What is the change in kinetic . ):/m st9mtxfcko yr5energy 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 1sy-v:g:pk rn9a;j h7e2-V battery. 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,y:r:h j9p;v7e nsa k-g 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 qrc j1r+kf7+dm, are connected to a 12-V battery. An electron released from rest at a location 0 +jk1r+ 7fqdcr.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 battere/flk:jhzxsir , 7.l; y. An elece;ifz :x7r j,s.h ll/ktron 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 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 ci(:g0ociz55 7cicq pthe east. If the voltage measured relative to ground at a giv 5icpc i7c0i:(z5oqg cen 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 tom he3). uan:mq pmc:r5ward the east. If the voltage measured r) nap.q5hr:mm c:eu3melative 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 V, it wil ) wu0dimpqjr pd7;9v4w3 uj5dl acquire a kinetic ene; p75dpmvwj ur3ddq)0i9 4uj wrgy (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 distag ru 5r;8*fmaonce 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 elj hjrlc5 u1ud:1j31qfectrical potential fou 3c jjhljd:q511r 1ufr 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 ajb p0mb26 hdd/ -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 at point (bd2 j/ph6mb d00, 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, 0). Ift0a gwta8p s1+j5 lpl. the potential is taken to be zero at infinity, what is the electric potential energy of a 1aj wgtp ltalp+5810s ..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 charhpc*1 u/a 7rknge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to7 k1 c/rua*pnh 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 reccsg8 p8rf mj*+nqfp(pqg6,r8+ xr j5ptangle of sides a and b. What is the *j prgp +sffc8rn8 (8pxgmr6,5q p j+qpotential 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 onav5uqkb.rix) ./8 n zi a side. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are riza ) xn.i58/u.vqkb 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 +2e, massrz/x 3qk eh4+v $6.64 \times 10^{-27} \; kg$) 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 of 2.0 mC, at the colh,+fq u 4ynweed3yaie6+zp3+u o:dd-5 z 8nj rners of an equilaterdq 358 e:u-ez6n+iyzp +fowa4+ed ,nyj3lhdu al 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 cv xn*85zipf-6ao0pqik 2g2 rv apacitor when it is charged to 100 V?vi-o60i2az2n8 rg* q 5xvpkfp

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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 halv fkv +5k5 ;src;vym/s 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 separat2w tbcte9 ng70wk.zm,ed by 0.050k2t wtzwe,cg.90 m7 bn mm. If the 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 plates of0: 1z8 +cqrr xpd+1ddl.fyztf 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 potential d2pwjpc6lhc3f b/ ,oc* x+ c+ejifference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between tcje fxpo 6 h *cb+3cj+wc2l,/phe 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 battery31mpxz,z b3ui9+ 8d,j mdp rsb fully charges the capacitor, the capacitor is immd89mmx zb , si3dj3r,1 puzbp+ersed 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 cap54zf5zf sy, mnacitor. How much energy is stored in tfn5s mz z,5yf4he 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 the energdwu5 i/zx/zrc,w g*;v y stored in the capacitor?i*wd;wzz ur v,xcg/ 5/

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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 8itprt 9ahy+0l3t7 a c4 unk5iwhen it is connected to a 12.0-V battery. How much work was done in chak 5cp9th+n87irtal t4ay3u 0irging 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 capacitorjke7urf;,nf,y hjg3 * is charged 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 ag0;qt:+ nzeadrea $1.5 \times 10^{-4} \; m^{2}$ 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 l;pext61q .ytarea $1.5 \times 10^{-4} \; m^{2}$ 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 con4o x7d,rk(:mlghr + h;qr3rv psists 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 plaqfl h/ o2es+(ih 7zey/te 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 constructhy7gm:,x o9 uved 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 50-8 v ;r19;ul2bsyppxhbV 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 insertexrbs8lu9;;phpy 2v1b d?

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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 ttm;x 6cyqd:7so a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills y;tcqx dsm67: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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