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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 followicu vm.w6q1e5l-r*1svku 5jlzkxh0/ zng 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 coulombs2xgwl y/dzx79 aqv-: 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 their surroundings. Objectdxus 2hb*s 9r: A has a net charge of excess eduh2r x*:b s9slectrons. 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 tw mvht+7 :3.pkimb-e v/-shphhe 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 in a direction opposite to the electric fiel(+ z5;czwk(khhgo)1l tg z/ q6k rixm(d

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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 cvlf4n)l kh2qcs+ xhjpq/ it4 -e5e(b*onducting 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 je)r aellg3y9ba08. jv by a 500 V potential difl30a9yge le.r8b j aj)ference. If 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 tmwug4;k(po8 ghe 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 fromj 4aqv5s+p ii csoe)(9f9(fk m point A to point B along an equipotential surfaceisc )vf49mp a qis(+f(kj59eo .

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mus ilz ddt,,i3f6t 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 equal to an vai k0)hwl3)sfve5*l9s4ythat on the electron as a kaf95l3 *li)h 4ynv w)svsa0eresult 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 x j1ppkda:o5: :uvrvza+v 15b; rph+j 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 corresvr ( os8hfv1/pponds 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 poi8b73y aqx;jcant charge is 100 V. What is the absolute p;b8aj xay73 qcotential 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 charge is 7g9u rzcr hlq 9eqqv ok/3n., ;m)qck5-100 V. What is the absolute potential 4.0 m away from the same point c/. ,qokk 3qq cer9)rz7vmnq;hg5 9ulcharge?

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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 charge or0 6tbllipn5)iy(ym 0f +Q is located at one of the square's corners. What is the absolute pote y(0y)5t0rpml nl6bii ntial 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 thesn s pj,zj77om(a8 b2t1zvy/ z vs,r,n:tm ;kn center of a square is 3.0 V when a charge of +Q is located at one of the sq8tp rn,zzn tms /m1jjs;7vsz,,b:2n vy o(ak 7uare's corners. 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 two charges that dco2.zy a1:d lare

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per voltp, ze4c,cy tjtr6y2e4 vjp 6l; is 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 cap3iq o ru436gdoacitors are identical in every respect except that one has twice the plate area of the or334guiqdo 6other. 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 capac-vztwe8e yw(d1oj80;*ky+s zvo ezq.itance of C. If the area of the plates is doubled and the distance between the plates i*edwo.zvs 0ywye 1+z kve ( 8;o-qt8zjs 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 thenqln41op s5fwy25+ str om-cr9 is removed. The plates are immediately pulled apart. (With the batteryqlno9t5w1ocr m-sy4+fp 5rs 2 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 betw3syhy57 n96 ibujcc y.een the plates of a given capacitor is weakened, the capacitance of that cay3j75 yuc9 .nsb yhi6cpacitor

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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 conste/6igoit* wy3 ant voltage by a battery as they are pulled apart. During this process, the amount of chatg3i eyi*/w6 orge 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 capacihdl0o uey9:q 6tor are maintained with constant voltage by a battery as they are pulled apart. What hehu6 l0d:9qo yappens to the 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 dielectris rwp::/lzx1f x1)tsg c material between the plates of a capaf::)x zr1g/splw1xs tcitor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material sucy5r /x7vx7 2i(yj4:fm b ozwirh as paper is placed between the plates of a capacitor. What happens to the capa (:yjb5 r/oziix77vx wmfyr24citance?

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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 betweoluj0mks +*hy bc ;wqi h0,o5;en the plates of a capacitor holding a fixed charge. What happens to the electric field betwe ;ko+*yi 0;hojml0u,cbqswh 5en 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 bz05c5+pyjq4m 5 5kii,iwknzjattery and becomes fully charged. Thez 55k+n05 iijjpm45 iyzcw ,qk capacitor is then disconnected, and the separation between the 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 capacitance of a capacitor halp2 -) 7,6*2qlkmjsa ab jtewolding a constant charge causes the energy stored in that capacitor to a2aal7 sk,w*tbje- )qjpl62m

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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 capacitorsua:,7wew8/nqogt/;d +xvszeb6 zc ( causes the energy stored in that capacitor toz sca:8wvu+g/7 e6oe( b;d/tz,qsnxw

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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 ene4+bggf0hvzv / rgy to move 10 C of charge from point A to point B. What is the potential difference between points A and /f4vv0zb h g+gB?

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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 ele;gpps4wzl )v -ctron from point A, where the potential is -50 V, to point B, where the wpgv-z ;l 4p)spotential 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 potentia o8tn0mtsdcs a3( w4q5l difference of 500 V. What is the kinetic energy of the ts cn5o4w0m3s(q adt8proton?

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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 electric potent 33+poz0dwls * ne gbmnpr82,eial difference of 500 V. What is the,ped g2pne3 8onwmz+3bsr* 0l 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 bt t85.n* rddhgd8 a3xdifference of 1200 V. What speed does it dxg.8ah8nt *5dr 3btd 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 movin9-i 1 *q.nfze b5vdjm x3jet.pg $8.5 \times 10^{18} \; electrons$?

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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 pok; oj. veicm4pe*l c-5tential difference of 500 V. What -c4.eko lcpj5* vemi ;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 of 20 mC. The object is acceleratedhmy .u9sc( j.x from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of syu j(cm9h..xthe 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 between two ph t4o2infaicwu(4y ): arallel metal plates separated by 1.0tu( 4a2hc:4ini)yfow 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 directed parallel il:grt* ,*a ,sp.fxksto the +x axis. If the potential at x = 5.0 m is 25gfr ,l. ixp*s, ak:st*00 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 toward4z ca j6m4,/6ec vdngu 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 directly wd/4jv6gz4 6ccnaum,eest 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 magnitu ve *y,jv(3al3h;nrcgde 3.0 V/m. What is the change in kinetic energy of t*hc g(rln33y;j v, eavhe 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 m1e /3x*j2amh(gfb)u s ep;hnn, are connected to a 12-V battery. An electron released from rhe3an pf b(j;/g ) e1s*xhmun2est 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 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 connec58s4 m -8ql5l vcwxhkdted to a 12-V battery. An electron released from rest at a location 0.10 m from the negmkdsx5l88vwlc 5-4 hqative 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 con-+ub.i *pt -w7-b9koddxpfylj3o ,yunected to a 12-V battery. An electron released from rest at a locati*dt.o lk 9pwpuy x3j,oi+db-f7 y-ub-on 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. q;; (jxwagaqji - )vqvuft +72uxa4 g7 If the voltage measured relative to ground at a given point in twj42 uaf (qt;qx+u7va;aj) q7 g gv-xihe 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. Ifoyfao 9+6 d.01tmekff the voltage measured relatfot10d6 fm. of9+eky aive 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 will acquire a .:d j* ctr8/lksdvr9 ukinetic enekdj*d :u srlrt8v/9c. rgy (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 distjquv6j6j: zd+ ance 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 endsrxsrzuq* 10 :g of a meter stick. Find the electrical potenti g0rr:qx*u1zs al 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 (0, 0) and ai6zh3 3u; 9sto+ugk3 vuju 2(vng v/pf9np 0nj -2.0-nC charge is at (3.0 m, 0). If the potentp(j9ngn z ou6h 2n3uk puvvt0;ji3g s9/u+ fv3ial is taken to be zero at infinity, what is 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 charg ic7zgu2ru*. skbrxiq ddi,w s n3,-;)e is at (3.0 m, 0). If the potential is taken to be zed,bi;ckir3dzn*, s 7u - uws).riqg2xro at infinity, 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 (3d - 4xe7ulzgm:ax.mx /jri 3q0.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.er-gamz x037q4j .x/xmi u:ld0-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 +gx86zte iu1yro3i sw. mh-* rat the corners of a rectangle of sides a and b. What +1rygmh-uite sir .x*wz86o3is the potential 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 on a side. Charges of +4.0 *sj z-7-hsm4/uvhg8ln - ovbw 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 squa*bn hsu47 8z--olvv/hj-w gmsre'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 (cr1r7hjm)wj i/3al,ey hio x*+harge +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 charges, each of 2.0 mC, at the coj+zawhem ,72 b*ui32thyukc9 rnersai+2eb ucmw7h 9,u*3z jthyk2 of an equilateral 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 i*sp 2ys2lusu/s charged to 100 2uus*sy s 2l/pV?

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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 4.o *yfdu/ixy9mpz7 nhas 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 i u, bkkfi3dno -6ih)c8s filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the pi-n3hk,bf ko )8cid u6late 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 platvam hy t6a/+dxtv lao3141j(aes 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 plavb9 xus 6 avy:tz3/7nly8 -e-hz5plw lte separation of 5.0 cm. If the potential difference between the plates is 2000 Vnw:hy z/u bas- 6lx yt3e8pv 7v-ll59z, 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 capaciteg c2s xivn*+*or is connected across a 100-V battery. After the battery fully charges the esn2*i* x+vcgcapacitor, the capacitor is immersed 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 capacitor. karkj 7l2uy;* How much energy is stored in the ca2 yk;7kj*r ulapacitor?

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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 caziiwzcu0d8 n u,48-ujpacitor. What is the energy stored in the capacitorw-n ,u8i ui8z0d4jcuz?

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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 is4+5 3s g;gpjvmnhr/zt connected to a 12.0-V battery. How much w+ stvnjg p4m/r h3z5g;ork 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 that it r- 6p a;gu cnl3z)kvk/ b*jcd4stores $2.0 \times 10^{-3} \; J$ 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 b;ph 4j1)xs5q:o,mwk0gtp1ma f rof8 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 ozm:g 75 wi*rlvf 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 consists - rpj98usyj); n lhvmbl5 uq3*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 platomo6 q q+*i.fxe 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 capaci, ws t+f*;qeudtor 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-V battuvk,;c6r(d:khkmj bi4 rsn :) ery 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 capacit ikk(vu::,bsc r);r h4dknm6jance 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 5w9umn+ ; qlf5engzq:(0-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 dielecgz ln;+qwm9u(:5 e qfntric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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