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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 nf:a 50oye:js6v3 v 0 zyncpvq.ot 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 isn0:z9m(ces5 krvaqi) 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 fqcot,w 7 q.u7objects are insulated from their surroundings. Object A has a net.,wu ftq oq7c7 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 the diat pbzi m9jjyg:2a r-0;a(9 gfrection 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 tot tfdnv,,lf0 ) 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 spher5ti/.+l( ji mj 9xntyye. 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 a 500 V pf3m)z iger 4yac,em se-1 u4 4q,ipl8cotential difference. If the pmf4 q,i3-1pec zu ea)m gei8,ly 4r4scotential 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 poidldlz4zxf eq:p0/ g10nts are at the same 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 kqtg:8*ra7jopoint A to point B along an equipotential surfaceq a8o*t k7grj:.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mgruh 2bj-p .z3 ;quaf/ust 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*cpbqq:d,8paq7 d rt) carrying a charge equal to that on the electron as a result of moving through a potential difference of one volt *p:,qr datpqc8 bq)d7is 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 iskvr 7mj,g+ogk)g s1 *7j h3hhd 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 corresponst oh9uav*w:*a1x 5 l:we0 atog-vln. ds 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 charg9z*(c,0 +q4y0r zy l*:rv kjcqbqa yuxe is 100 V. What is the absolute potential 4.0 m away from the same point charyqcu( bq4l0cvxyr,qy* zj9:0r k+ *zage?

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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 v3 lcr (-sb s9w)ehzv+negative point charge is -100 V. What is the absolvh c9b3)s wlrs-(z +evute 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 ch pgjx2 zsn(r4t; 4nai;cp+/q warge of +Q is located at one of the square's corners. What is the absolute potential at the square's center /w x +anqszptnr i(j4c;2pg;4when 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 b:/k;;djwds v0rpz1ypuu g5,h5;c ova square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the a0hobvpu ;;pu5s5:czd wg ,yrkdv/j1 ; bsolute 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. cssdzvh2udl4 6r( fnl6 13lb 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 ise:3fzzt)h, le 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 inco c ;(kujn5ep h;i.g6 every respect except that one has twice the plate area of the other. If the 5c;euohj6(n igcp.;k 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 plates hnnc4 g *.pc iy/k-( kxx,sh:rjok2c+is doubled and the distance between the plates is halved, what is the new cg/k4n-,xno rkchcp+ .2xh (:sic jyk* apacitance?

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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. The plaae4szyj.jd+7 w+0s bbiv2 pe;tes are immediately pulled apart. (With the battery disconnected, the 7; y 0vdze4p e+jbws+j.ia2bsamount 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 capacitobe0s (x jyr9h2r is weakened, the capasy 290(ebrjxhcitance 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-pla58ecpfc yto/8 te capacitor are maintained with constant voltage by a battert5cf e y8o8p/cy 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 s 6ww +,y.lbmofjx*7w capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strww+fsjy, wl.b6xm*7 oength 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 q 8w0sh tmjf46between the plates of a capacito6j m08 shtqf4wr.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material suc pyal9 ek(6r: s1no,qfh as paper is placed between the plates of a capacitor. What happens to the:q(a1er6pksylfo n9, capacitance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric materia h y kt.n6y2t6(do4jzml such as paper is placed between the plates of a capacitor holding aht26 zy(4mnt6jyod . k fixed charge. 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+42-a3+l m dbxmu;mquhza w4d fully charged. The capacitor is then disconnected, and the separation between tx zd3ah4+m;lb2 4+q ma-mu wduhe 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 capacitancps.jr mpm9)l)m1gsu u)a ;l1me of a capacitor holding a constant charge causes the energy stored in thul; s mup))g)mmms11j9ra l.pat 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 acn5kxy 62nx,goross a given capacitor causes the energy stored in that capacitorky6n52o nxx,g 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 B. Whab3 fn9gc+ g5bzt is thb3+ zb5gfc9 gne potential difference 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 kal;c f n wsc2::p;gq+A, where the potential is -50 V, to poicfq ;c:gw+;2sn a:pklnt 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 througybb(hpv+aq349h 0bc kh an electric potential difference of 500 V. What is the kinek haq09b3yh+p(cb4vb tic 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 el fp(cn(z6m7ar34j3 o9yr04g fkknvj q ectric potential difference of 5074g 4jon3603 ynzj(cfva9(rm qpfk r k0 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 diffe znel8 qe(2)s+dkfphnf0g5fs (9v+w g rence of 1200 V. What speed does it acquire?p2vhn5f sg( qfd+ek 0+8sne9wl)f g z(

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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 movintny:rts+kc5tw,7 ,n og $8.5 \times 10^{18} \; electrons$?

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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 poterk:. ha4vn q hkablnu0),c),ontial difference of 500 V. What is the velocity of the electrvu)aahlro 0 .q),,nhcnk4: kbon 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 is0g. aps+oy;x +jdm3lm3pb z v1 accelerated from rest through a potential difference, and afte;+z0xsp v3m d+3lyg1m. jpabo rward 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 0 19xoqu+ idqwdifference between two parallel metal plates+ 1q9 oduwqix0 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 fww 7uk/(7syu;yr4 qr xield, with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potenti/4yrqxkw ; u(s r77uwyal 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 fiel1 mm)5 r qeqkd).x)npbjr) w9yd of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the volt wy) 5))rkn19jqp .debxmrq)mage 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 r81g4c4buh bpof an electric field of magnitude 3.0 V/m. up4bg41c rb h8What 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, separated by 0.20 m, are connected to a 12- z918s+t 95tfvzdjil:rpk: qrV 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 dif8lqkrzfd:t1p +j9 9i5 :vs zrtference 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 0.2 jj.pf -rm;t 5y4+ iwznwldw o*au2b+;0 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 0.050 m from the positive plate*wfb; ul4z+jdit5w jnram;pwo 2.y+- , 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 connectug3p xob:72 1w9st3yyj8 o1n iu ;wafy--aiwx ed 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 awf79:3iy3uyy no a-iub8w-2 ;p 1jo 1sg txxaw 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 eld((hzqgst/; p ectric 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, whaz/g(;(dq s tpht 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. If the vonqp8 fwkj 1. d)e:pq,t.+hfcoltage measured relaqw:k .h.d+nefp qjco) pt1,f8tive 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 1l r(mhk3 9f4yz2 V, it will acquire a kinetic energy (in thr4(f ym3l zk9he 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 distanccjs )ipk( f)i3cr* /gce 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 metm7 : j468w;3)ngzfrktf zim1veo m5lter stick. Find the electrical potential for th5m fkj;g1v etzl n3mfi67wm o)t 4rz8:e 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 a -2.0-nC charge is at (3.0 m, 0). If the i e4 :gxgew +g;vxt.r;potential is taken to be zero at infinity, what is ti g.xx+ e;v:wgr4;tge he 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 -29)pgsynb(v/9 (ocyjplb -, f h.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infing/bh-c9n(j v yypp (ofb, )sl9ity, 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.vt csp1+j07eu0 m, 0). If the potential is taken to be zero at infinity, whaj1c7 se0p tvu+t 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 7xz .wh/qp-zgthe corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q =zxg pwhzq /-7. 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 +4.0 mC ardnc od eew3:bi89o0. v0* g)bg,xg mgte 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 pb*8ecgbxg, o0ot9g0g 3wi dn): m.devotential 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, c1 (ph,4,rg pta.lzkvmass $6.64 \times 10^{-27} \; kg$) 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.bfxy rp (1b-j w4l,ty 2erj5bus8,4dj0 mC, at the corners of an equilateral triae8dt5- x(bybypr1j ,j24f ws j,ul4brngle 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 charh)md uag3 7yea3jc5s 5ged to 100d 55jhauacs7myge3 )3 V?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor5 r:h0ny v9u+yit *kna 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 separat)zuf( d)badj8ed by 0.050d)u8dabf) j z( 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 plab:obljn/8f.dc)d iba(n-1 z gtes 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 cm. If t gy.2nwjb7ueyeg r624he potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric fiel6u724e.bgwygn j2yre d 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 hb8-ij.( fkc2 u+yj2caac m 2xebp.f)a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). Howeamb2(yxi.af .jcu-22) jphkc+b c8f 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 energy is st.:66c9npnqzv2qf7 :aqy n b xaored in the capacc n q7fqap9n: y26abzv:6xnq.itor?

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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 energy st,f1y.d ld0xfku2eqm-k.2 2clol pw3 dored in the capac,e .fdud-m230f.cxplodk 2kq 1w yl2litor?

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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 ontd4kb mmuk0-(rxyhb-sg / flc; )zq5h :o the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capacitorsbxr (k du-m-bky;h05zlg:f h) /qm 4c?

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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 thtrshj v;wx0/,yi kp bi. s9qw0st- 7.eat 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 plate-1cz+sau;z fqg9gu kkb1 yu(;s 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 pla9gvb6dku0a aqxa*; cq6 qvo-(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 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 pla:2z9cyfh at:jna* j 5jtes 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 wix /) 6wnqms2hhx+mjd 6th plate 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 with plap)yrcolq+.1b opu i,9te 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)gm7a4j28k.x d,d9y+ yak lg mpew,uq battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space bmjdp 2, y7+gqelawumax9 k,y8kd .)4g etween 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 battery and becomes fully ylay:5 :gu a 2r 7;rdq.hwos+kcharged. The battery is removed and a slaq2owrsl:r; u ga+y7 5y.hakd: b 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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