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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 n:w 97yn;lwafj 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 coulom;80)6ty,y w hi dnfnltb 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 zh i:mrg f-tpi* w:;t;from their surroundings. Object A has a net charge of excess electrons. Object B is g;*thwzf-; p:grti: imrounded. 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 direction of the electric fi;xv )o 8t+st7bc:y5rtwmu fn)u-xjk 1ab ab;. eld

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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 elehy:-- ht7v xjjctric 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 spher nv +oyscn38 3dyx 9lqe*7bdr(e. 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 s h;,7l5w*axnpp rf)rkt6y v8500 V potential difference. If the potential difference is changed to 2000 V, whaplpykh7 v5aw t6s x;*rr,f8n)t 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 allgidbi170)to z points 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 point A t; jqkyxjy7mvw6-y;+v4 sez.y d7 /ukyo point B along an equipotential surfacjvyk yyues46v /xz7.;m;+y-7wj k yqde.

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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+;n/3m img kku 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 partiui5b pp ufxheyy0 1-.7cle carrying a charge equal to that on the electron as a result of moving through a potential dux1 y ey.-7pi 0ubpfh5ifference 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 an)cvl)+u5rj oh /ysu2 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 corresponds to2t7dx( c) p cmla0c5bs

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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 o,37iivxyx) m point charge is 100 V. What is the absolute potential 4.0 mivimx 7 y3,xo) 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 dist fnym cb.rz c/l7/ v2qy1+i1oax5rxn1ance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same 7cm1yxr1+b o/f.n5v iy z2acql1 /rxnpoint 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 whe )0(dy03tf gbbsu 8pgwn a charge of +Q is located 8ty3g b0df)wp0bug s(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 aho pz l*(nzu:*i,2ba st the center of a square is 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 * a*s n2i bou(zp,:zhla 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 charge9y8m9rry as)y .*3- :t7ib krc tt9lftoj3 zols 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 q/j+) ieou(k ca

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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 t tscv) -.zbyl0hat one has twice the plate area of the other. If the smaller caplv.t by)z0s c-acitor 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. +rvu3znb+4b bIf the area of the plates is doubled and the distance between the plates is halved, what is the new canbubr+4 +bz 3vpacitance?

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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 capqak/p t)(z sn,acitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnect(zpn qsk)/, taed, 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 tgbr(mjfw4j z ,8.2plj he plates of a given capacitor is weakened, the capacitance of 8rmwjj ,p4(2zgjbl f. 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 paralfimdekqxi n( o(+9:s+lel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During t q(ii+ d+(em9 s:kxfonhis 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 constanky 8e6koa 3sbya u2 52id2cz+it voltage by a battery as they are pulled apart. What happens to the strength of the electric fsa32a 8ko+deyc62 kzyiui 5b2ield 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)h:ghr yo/-aj)n1g6rugv c f 3 capacito1g- foc6a: v) yhgr)un 3rhj/gr.
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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 plates of a capan fw( o3lruj1n.b,h x-citor. What happens to the capacitu -, lxhn1nb(orj3w .fance?

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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 p jhr7. ug80twwlaced between the plates of a capacitor holding a fixed charge. What happens to the electric field between the plaur th8gw 0.jw7tes?

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacito0e/ 3-f.1l+ cjezxopqz8p rxqr 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 that no charge leaks off0/r1-e p oj+8ex3z plcz .xqfq. 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 capacitanc q *o8,azqbvbj:9mg/)ro /q hge of a capacitor holding a constant charge causes the ener,j:a go r)qbzq8*/hb9vmgqo /gy 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 stored in that6bbv.p6qsk nrbt7 yy:3w1 0vy capacitbv0 s3:7vp tnw1ry.q6 by6b kyor 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. Whax+81 6+30xh xf detvewqiv at5t is the potex3qh vf+x15te0t8 wv6ia+xde ntial 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 az (egro2m9 w dgy*2g:h1s4rbdn electron from point A, where the potential is -50 V, to point Bd21 wbzg9h(g4yrmresg: 2 o*d, 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+myy99 ny jx(sddp2u3 potential difference of 500 V. What is the kinetic p3u9x2+y dm9 yjndys(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,r wg6up gcl 89l 420yf59boxje is accelerated through an electric potential difference of 500 V. What ise959 b0lgg2jx46 8o wucryl fp 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 ww8jhdp40j x9rence of 1200 V. What speed does it ajp8h wwd j490xcquire?

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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 9b;8cyy6lch 3 b:bow 8o.0 V do 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 is accelerated through a potential differen*r -qfa-zp/* k1d yg6iq ngk,fce of 500 V. What is the velocity of the electr kyrf-1 6f/qnq-gi, akp*zd*gon 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 (vuav 5 w cvgc./qj7yxs-8tufqr+ 98rof 20 mC. The object is accelerated from rest through a potential differf rv/+-8 5vujgw9qu7tva8 c q. ycs(rxence, and 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 tacn z-;x+z 1lna d7.o: / heso(fnak/rhe electrical potential difference between two parallel metal plates separatedsac17hf z/z- na.knanoro+:;(xle/d 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 y..wc7n* ieg0- tlofkdirected parallel to the +x axis. If the gl*noeki wc7 f0.t-y .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 direx(6 do04eyv7sy cyo +hcted toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m direc ys d+e6vc0oh4xoyy(7 tly 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 c th skt-n149zet- 1tefield of magnitude 3.0 V/m. What is the change in kinetic hn4- -z e19tt 1etktscenergy 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-V battery/az l6j)od7jb 2p1avh. 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 pod6/jz2p h 7l 1abjv)aositive 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,9cg)-h+e2c6nz. s btcvi svz. 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, how much kinetic energy does th bvz29v+c,6ns.zcs gc hi)t- ee 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 conneci pm9 .bq/q*dtted 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, what is the speed of the electrob *tq/9dmq i.pn?

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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 7s kx ph;dh);:h 1aqtxthe east. If the voltage measured relative to ground at ;: s;t hxak) 17dhxpqha 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 electric field of 50 N/C directed toward the east. If the vmr/v q5es-( r0i.nme 5icsa+aoltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.i+c- 5s0i an(srm qra5/ eve.m0 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 will acquire ahs(ie) e3i96)qrn fsg kinetic energy (in the absence of friction) of 9 sqif6nsi)(erg)e3 h

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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 distance of7zhh9zsk-adcwdc 9. : $5.0 \times 10^{-10} \; m$ 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 electril50s 2kp/l7lhcmk+t b q8j 8ipcal potential for 8 li2 hc jl q/l7b0+8p5kpmstkthe 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 chars,e: (dx p,fnuge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential atpf( nd e,:,sxu 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.g5vaz t9:j u0w1 x3xrfcqbiyj3s0 g-80-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 point (0 5wgt38gj0ir9 q1vyx-b0c aj3fx:s zu, 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)vobe *fda1z(s* o-r (r and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zer *or( svrbe a1fdoz-*(o at infinity, 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 dwgeb5bp : sf, blp/vw4l/c ,)+q are placed at the corners of a rectangle of sides a and b. What is the potential at the centersblf dpwbc:,w/l peb vg)4/,5 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 sid 6zk8aycqm18w,/hbk36ex 9)ai rbsn a2( giole. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed chak8m ax,8h92a3sqaliycwbg/ o(1eb6 ) nrik6 zrges 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,bg-1u5vvjnr b 7wi/ho 7slm6. 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 charges, each of 2.0 mC, at the corp.d)jn /n0 qhkners of an ed.nqp)0knj /hquilateral 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++ int znno3,v a 2.0-mF capacitor when it is charged to 100 io+n,n+nz tv3V?

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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 hv sg 1*4h rr hu,gl1gkwfb9*i. ynlrmds,2 l(5as 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 ae;cn)ep+wt/ o;k0ginp x r78y m.wxi:ir, and the plates are separated by 0.n/ket:p) mi87.xe wr;0g+;wxn i ypoc050 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 of aqy6sbj r k;,95w6ac0sgbd8 fgrea $0.20 \; m^{2}$ 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 capa-2oz32gvq -71s umc mana2w sjcitor has a plate separation of 5.0 cm. If the potential difference between the plates is 2000 ssg-amc2j au7nm q3o12z-v2w V, with the top plate 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 batter7nh6y cztk4 ptk+j 62qy. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dint+4j72 qpkkz cy6h6telectric 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 much energy is stored in kz-8myhp ;+5,ed nhbyc e,r c/the capacitorr/+ khb,eyn-pydz8ce hc, m;5?

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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. j+(jy lof;-n xb,6jtp7zbe 6xit.e,r What is the energy stored in the capac,6 ;lnj o.t eyb-ft+7xxij (bjr,zp6eitor?

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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 ty z02--v2kg0polltvp o a 12.0-V battery. How much work was done in c0p tglkv y p20z-2lvo-harging 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 char v;wqs ;hu7(l8/u wlppged 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 plm *dv4v t-:r-(t/jwxefjqj s4 f0kx h266taqfates 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 consixyj u36ggb0c-n6w7b zsts 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 capacitor f,210ct* dii yruzab1:t p1feconsists 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 constrd y,a nj45gp,ructed with 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 consru3w3sb9tc( 6 vb+hp , wwikz-tructed 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 cfrv *l2:ex : jf91jb xcrga*w9harged. 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, wh*ex9 l2c1 :g jvf:bjwrr*9xf aat 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-)nbm5-t4m wk fV 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 dielectrictn4 f- wmk5)mb constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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