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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.ysx2ppyt; +b 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 ovwe(q a2 6wutj12*b tis 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 surround5yhnue2 h+4hrings. Object A has a net charge of excessyr5 huehh2n4+ 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 dikxqwrsh/dx51 nn,+ x+rection 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 dir md8bx5ue*ts1/m5 y ;o/jurdwection 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 conducting-ef60a4m d1)6zw6qvqwh,obi :w ognp 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 cca)y7w8hya*s9*f9pcrlat* , 3 asfq a 500 V potential difference. If tar 39 9qpct* 8l ,hfsa)*yc*aswayfc7 he 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 referred to aiu,frmdg5: 3 ns

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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( 80 qd j(vt00fqqljuf to point B along an equipotential surfacef0(jvd fq0qlu8qj 0t (.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfjpzebj8v o .(/8 gx6woace 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 cara 81i ufspj.-grying a charge equal to that on the electron as a result of moving through a potential difference of one volt is uip af-8 1js.greferred 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 unit8 bppzs.*1;( 7yfhejevg+ wcd 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 correspoy; m.g.e /:+r+lrfeik:km )2venfd i onds 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 akks( sjo-50 ja66s 72zlwjazut a distance of 2.0 m from a positive point charge is 100 V-j j(u5a2zok ws6zsaj07s 6 kl. 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 a distance of 2.0 m from a negative point charg*1/ aemwgqg4git vh5.e is -100 V. What is the absolute potential 4.0 m away from theg.54g vmqg*ehwat i1/ 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 cegoxp((l mj- o5qc*x98sh)zwp nter of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the a(cos( o w)jgq9ph- x*xzp58mlbsolute 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 ela **aqd)q tl6)ip7jsquare is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential jqt)6ai)de 7pa *l*qlat 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 s0 rpx1y3:iydk,txg6charges 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 ;hkx(a. yxbg q0ew)*a7 cgv;mis 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 respect except that one han 9)p5 ezl 2h-hjutu9rrx)4hes twice the plate area of the oth)njr hhl5pz9re4thu-x e )2u 9er. 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 the plada7 q2n ym+qy7tes is doubled and the2ym7 d q+qany7 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 ,i)5lsf mkn19op0 t/pjt9ycq8oh/v bparallel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With fl,qm9p5 n/9v / sboctt0ko j)ip1 yh8the 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 capacitor is 9 otz; 8dgo r80v;kmqi.)d nbaweakened, the capq t8m0)br9kd.zag8ivdoo; ; nacitance 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 with8jrs9gv;j:exj1x5 b0k d z+ej constant voltage by a battery as they are pulled apart. During this process, the amount of char: k58 jjjd09;ber1 veszgj x+xge 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 a ;p9 0lmk7i no71quugtre maintained with constant voltage by a battery as they are pulled apart. What happens to th1p0u n97 kgql7m uti;oe 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 foly/psbo:7(3 m .taciq r adding a dielectric material between the plates of a capacitor.loa p.c3sb (:yq7 it/m
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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 5v ,t c8blwvwxo+wi0,dd l.k 4placed between the plates of a capacitor. What happedi,+b58x w0.cwlvd ktvlow4,ns 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 betwee -8ftgo5bk z:ln the plates of a capacitor holding a fixed charge. What ha bz8:-5 gtklofppens 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 mo sj5ovza53f90qhaae5 (-p) z.qba/nr m0u i is 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 tha)n5e0a (3iz 9o-5vfupmmj /oaahqas.r 50bq zt 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 constanti9q *jbmfz ga pxp*q 25i/d24r charge causes the energy stored in that capacitoi/9g*qfr bx5zdj q2p*i 4ap2 mr 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 causp ze(gr-hi+k b(9gsv/gtg/c; es the energy stored in that capacitorp(bescv/h rk gz-(tig +gg 9/; 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 p 6jic +0xia+daoint B. What is the potential difference betwi+a 6i+xcdaj0 een 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 electrqx*kze 1q,buyru4cp,fn ( ;j9on from point A, where the potential is -50 V, to point B, wherk1*pzc;( yu q,4rq,nbx9 eujfe 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 thrm62 dr+3 zy2p(id;h8j.ldv hsuzgn, eough an electric potential difference v3h,; i2(ed2d8h zn mu+jyp6 gls drz.of 500 V. What 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 acceleratedx9kzy. z kxrmq/8lh* 5 through an electric potential difference ofzy59lr x*mxkq8zh/. k 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 differencv0yyho z6 ;p)ab q*/rde of 1200 V. What speed v/ 0oyy);6ahbq pd z*rdoes 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 mov7qhvh0 : g4fgking $8.5 \times 10^{18} \; electrons$?

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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 thfhms sie-* j4e82k-ucrough a potential difference of 500 V. What is the velocity of the electron afterward?ei -ucs2 kj*8fs4e hm-

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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 acceleratedh2 fh(ax 6qc7v9hff4j from rest through a potential difference, and afterward the ball is 7vjh6 2(h4xaqff f9ch 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 ele:ngtuly fb j9as9 v,4+ctrical potential difference between two parallel metal plates separ4f99a guntsj v:+bly,ated 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 directk4 wqagy)n2un :8d6r jed parallel to the +x axis. If the 8k2nw:jaq dr)6y un4g 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 eaq4te:ngs;y mro02o;q1*r w (np sli.f st. If the voltage measured relative to gro:gp rq;ry n;too2 *e0wslfm.i4(q1 s nund at a given point is 80 V, what is the voltage 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 dire0d5 +lpn+ 7yvk,cffbtction of an electric field of magnitude 3.0 V/m. What is the ndf5t+ cvp b,7yf k+l0change 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 conneccji eer lsm .f/7.s+d/w2 df9moifv, *ted to a 12-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, what is the pot, e d s.f +9wdmii2 j7/fmeosrl.*vfc/ential 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 batteryw3wof dltx3 lmwx)b2m 86m)- y. An electron released from rest at a location 0.10 m from the ne2 oy f x3-bx6)wlmlmd3ww8m) tgative 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 connectw hw:eokd 175ged to a 12-V battery. An electron released from5:w1he7 ogkd w 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 the east. If the voy u rt/d(+c,ttxlb,;fzuk62yl) 6 agu ltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.0 m auftz(g,6 b6, ;l+utyr d/ lu)yxtc2kdirectly 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 50f8h.a hb 2yd*d N/C directed toward the east. If the voltage measured rela.yfd*d8 a2bhh tive 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 differen 0+3c jl-x xptdesnl13ce of 12 V, it will acquire a kinetic energy (in the absence on+elxtj1d3lcs3x-p 0 f 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 distanpjto4 v+c63 (crpexsh ju1z/9ce 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 stickk9yxr q;px:l 8+b, 9yfsspci ;. Find the electrical potential +x,ki: ;sycpsp ;bf98xq lr9y for 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* ,87xceqm3 u myjauj( (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what im(*xuq , 37e8camju yjs 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 -2.0-nC charge is at (3.0 m, 0). If the poteqq z:2o a2d5cbd (5hvj qdw0f*ntial is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at point (0, 4. zdf 5dq ahqbc0q2* 52ov(wj:d0 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 an 8 *xy76a3a ae)axab,ase6q0b9gv dct (3.0 m, 0). If the potential is taken to be zero at i gxc86a7,6bs aaadenyb39*x)a 0qev anfinity, 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 rect2i quhzos7 7(zip( v9cangle of sides a and b. What is the potential at the center of the rectangle if q 9 ozv7q7iiphs (zcu2(= 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 5gjn kvuc2y1krh,iv)/( vv9//u mmwmside. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential in the squm1/ /cwv2)vmr ug9jni,vv ykh/ (kmu 5are'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 (chargerx9ct +- ; v/bgj8butn +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 three chy :xy1ojz w;jj(o5q q8arges, each of 2.0 mC, at the corners of an equilato wq8y;(q1jy zjj: xo5eral 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 capacitor when it is chargego n r, c1(+3 hlgmzi,ww7va9sd to 100 V?3 7zg(g,wmvn9 a,1oh wr lc+si

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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 pls6 6jdpb98;l,np 0c hrmrndz7me *r-c ates 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 separated by/k)6dfrs:ay3uv5m:kajo7 0wb bh q :v 0.050 mm. If the capacitance is 17.3 pF, what is the pljqk3o hsraad w ):0u bvyvfk5:/6 m7b:ate 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 capacitorh-ge+kz m.s; s7rk3lh ozr- 2r 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 py:o k mumestb2 9+x(4j*vht5cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between the e4uhk9t5 x :v m+*(sbjto2mypplates?

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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 batterw*d 62pv y6smds-lf5jy. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery,* plvy6 2ddf6wm 5ssj- 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 mF2/ yx,puvv 5exr4 xr1jf m,s+a capacitor. How much energy is stored in the capacej1vxr 2mvp/ra y+x5, 4,xufsitor?

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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 energ1*tao*,d r8b r g*xb 4gx pjj*,luslo-y stored in the capacigjro*bax*-t4d ,* bl8psg* uj orl1x ,tor?

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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 th; rextb8g+t y )mn)kfnp2- a*ce plates of a capacitor when it is connected to a 12.0-V battery. How much work wxe* ynf);8t+2k bm-r tna)pcgas 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 tvoni ;1 t hct36dk39xrhat 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;3np+0iu ) z(kbfovaey5*dwr 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 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 prg5g4(bt+jy t lates 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 pla6ve0w unsd k+:tes 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 -e xuzs3a0 7mnplate 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 capacimox, w3hhav(oe10ke- tor is 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 hah8fw7l.9 dn-V 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 capacitfah hwl.8 7nd9ance 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 .wxyf/aptp6uo. d 9e8g*6uj aa 50-V 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 a fu6 /ytp. xwp6*8da j.u9goethe voltage across the capacitor's plates after the slab is inserted?

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