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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?k u 3ca *nag91ifu0a,q

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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 0jd 3t)zdtek8 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 )7s/hbebmk9n from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at 9he7bbsnk) / ma 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 the elea2zf p,8*aor xctric 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 en3x bljqglx+;g/x 2z/ lectric 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 sphere. T5xo-p 5n)ll a jkzfu*k 3o0wt6hey

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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 re9. /vlr t7ut:tm.2z .pvq9qkj z 4btabst to a speed v by a 500 V potential difference. If the potential difference is ch9bz q7 ptvb/ttquz2t4. . 9m:j.rv kalanged 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 samm ir,i j 0cs5t1w2mk(me 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 i-,-+ (nj ;s;gr oirgvsssd5 calong an equipotential surface.ggis5-cn,+s -djs ir;(sv ro;

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must d4znwj we.xa3y8h30a 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 partbv oo7/./ew9m b1imlc icle carrying a charge equal to that on the electron / owbv1cm9boml/.7 ei as a result of moving through a potential 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 is a ,7 m34qi p4a9j4 t+3kp tgmnsgwwhx x+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 corres.tk12ssjbumdpr y13b ylj 0 1p;: ;btjponds 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 2.0 m from a positive point chxrqb829bwuhzn v f 69 v3fv(,qarge is 100 V. What is the absolute potential 4.0 m away fro9fb ,hqb8q 6(x9v z3w v2rvufnm 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 fr- wjnp.nl,,pb om a negative point charge is -100 V. What p n,,-.nblp wjis 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 wgssa)u r72 6ge8m,iq 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 cornr,u2gs8)me ig s7 6waqers 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 centox jp(.h 78+hvtba )whvo(:,xgku 3kier of a square is 3.0 V when a charge of +Q is located at one of the square's corneg:b8hh ,.3w( o vv)puijx+htok (ka x7rs. 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 twop ,mz,ry;pu 9q0*ualm 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 as./9 vjd- ibvs

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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 q .ebc *c09tzbidentical in every respect except that one has twice the plate area oec*b.t 9c0zbq f 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 capah q398o21t-.t zf rdkf apt/vjcitor has a capacitance of C. If the area of the plates is doubled and the distance between the plates is halvez -tt9pff8ov2ahd j/qk1t3. r d, 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 is removed. The5-8 od4wr:fx /qey/m f(gnvs f plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential difference be:m5eq/ - / f48vfyxdons(fgwr tween 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 betd2xdc6kb zm+ sf8/q7 fween the plates of a given capacitor is weakened, the capacitadbfdq x2c6/fm7 zk+8 snce 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 consth*7w hgrfe1 8mant voltage by a battery as they are pulled apart. During this process, the amount of ch8m gre7 w*h1fharge 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 parafl,1irg 7bu +allel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field +gbfr uail1, 7during 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 divuqc8ru ()m( telectric material between the plates of a capacit uv u((r8)cqtmor.
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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 pape6.ab pggn/8j3 )izvei r is placed between the plates of a capacitor. Whatbznvj g6/3 p.agiie 8) 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 platescvp/dl l-n1 9k of a capacitor holding a fixed charge. What happlcpv-k/dn l19ens 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 capacit lsg703/ocsx99 lm 2n kq;fxygor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates 3 x ogl/g0xs2nlcy;qsk 97f9 mis 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 constan0miu5r qiy:v43cnp ,s t charge causes the enerp:im qr,s0u3 vn 54cyigy stored in that 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 s5lg1o ,msit5u3a+na 21 tendi tored in that capacito ai m5e1dn, t+tg2nl3o5ai1sur 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 energyn jusv4v1 wgv4zc23v9 to move 10 C of charge from point A to point B. What is the potential difference1n3 sjvv94 z24cv uwvg 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 from point A, where thfsl3e y,wq.grn 6:g8me potential is -50 V, to point B, where the pot3m:y f86.ns,greg lwqential 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 a5q i8eoa: dg)6xvix,o c*aaxf 2;b6 dzccelerated through an electric potential difference of 5v, badx2qaeo68dcz5)*:x g6xi oa;if 00 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 accel;.h5c 3iy2fl kbizyn9erated through an electric potential difference of 500 V. What is the speecy53k;. yh9 ii lbn2fzd 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 aa-wz crv)4f 6u potential difference of 1200 V. What z cur w-6f)av4speed 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 jmxydo+fy/lh.(y m -46nu 8bb in 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 is2fpgif; 7nztn jl/ 9a( accelerated through a potential difference of 500 V. Whanj(n fgfa; 7t/p 2zi9lt is 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 oe- )c8lcxmut;7x ix1)kb 8fxw f 20 mC. The object is accelerated from rest through a potential difference, wxlc-1 mt8ei8k7; x) cxuxb) fand 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 difference betweef nedlc (-.stux,p,,c+0gd bnn two parallel metal plates separated by 1.0 mm. What is the electrict s,g0e c-d, n(fpxlu.,cbnd + 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, )t z5i2j+xxhe with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m isjxz he)x+i t25 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 ele7 n*cc.+od3l*6 lgfqdvpf +ml ctric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 8v*cc3. * dfq+n d+folp7 6mgll0 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 directels- es;cr8 o0ion of an electric field of magnitude 3.0 0 oec-8;rss leV/m. What is the 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, p hce4v3(zmu o9nzo84separated 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 electron arrives at a distance 1.50 m from the positive plate, what is the potential difference between the 4hzn9ov3(m4uczep8 oinitial 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. An egs.,cw7ph5r q lectron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.050 mr57gp wqc hs., 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 battercq.- j0g58yh ygb56h v2gnybny. An 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-h vgcn5 2gyyh yqnj860g5b .b 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 8giai-yu7s0p yohbzq w77;1 oof 50 N/C directed toward the east. If the voltage measured relative to ground i z7b78sy7puqa-iow0o; 1gyh at a given 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 electr,/tj2cd/qi/o fy ubu 50)lgqqic field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the j,u)yqq5f d2uqc0igb/l/t/ o 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 throuv giqar x-):d *q27aelt-i.fk gh a potential difference of 12 V, it will acquire a kinetic energy (in a:x 2gi-viek -7r*.q f)tal dqthe 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 distan ogalb(- c5-u4min ;knce 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 6j5as fgbb fx *+4jc;qthe electrical potential for tgbf;*cbfqj + s5aj6x4he 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 3mj aa) (-krvsa -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electj3ms ar( )vk-aric 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 charg4 ,drig dee0-de is at (3.0 m, 0). If the potential is taken to be zero at infiniddeir -,04eg dty, 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). If theo( db3vh-b fd0cwa 3c4 potential is taken to be zero at infinity, what is the work requirewc 40-fd3aohv b3cb d(d 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 cen2o( bivtqfx 86de)5k s;ey :orners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, )q 62bkfeiose ; y(d 5:8xntvea = 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 plgky:q)ygg y2* v uo(6eaced 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 square * ) ygkygg(q6v:uy2oe'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, 8me/ wr9, y)ty5gg lbgmn// 4dgu3tksmass $6.64 \times 10^{-27} \; kg$) 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 mCfxa5iu::x*by4 syn3 t/r -otb, at the corners of an equilate5yttur4xi *of- x3 /:nbb ay:sral 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 gsobj v*rz lpu -)9.s4the plates of a 2.0-mF capacitor when it is charged to 100 Vvo-uls*r b.z j sg4p)9?

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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 han)tq9w8w (ztcs 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,8qfhk +h. wxx3 and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plathxqhkw8x+ f3 .e 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 capacito8l)ns5i0 v i usqo-1epku,t*yfm:)swr 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 separat73 r+)ce3wc lqupkx;lion of 5.0 cm. If the potential difference between the plates is 2000 V, with the top platxw)+ q33 7k;cllreucpe at the higher potential, what 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. After t; tipmeaiig6s l;u4 t2(o nw01he battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional c 0o;;n4 s1ipi2wul6 te(tagimharge 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 energyofpc8 9jc7 vu.b jau09 is stored in the ca u08o.cc a7jp 99ubfjvpacitor?

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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 capacitorko: 9/rkvhr +z i8o1-ld nvhb2. What is the energy stored in the capacit/rdo n1-kviv9:8lz ro b2 hk+hor?

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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 when it is connected tru. l91go el+dh*j(:uaeo st5sc*)dj o a 12.0-V battery. *5leehtlg a*:9s.)ujdco+1u d o s r(j 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 la7f78ak n;g9ss6;k5zjs hal 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 area b 9-z1hr,es-izas9 jv$1.5 \times 10^{-4} \; m^{2}$ 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 spis* v j m.c 7ly1d.hl2woyd+ mo*./bconsists 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 capac zsi7xmcd/2,k7u bl3 mitor 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 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 are3vh f-cq(+fuma 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 consol)duavk4 pqy: w88u7 p; xe:ttructed 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 and becomes fully charged2jx j4d zae zs0gfr)1-. The battery is removed and a x0r)js g2 e jda1z4-fzslab 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 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 batterz)wc,o 1;3todpv/uew y and becomes fully charged. The battery is removed and a slab of dielectric that completely fillswceuo1)d3;pv w/t o,z 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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