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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 f8(ws, pgn ui5n oz,1v7u uvsp ):8fhtis 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 coulomsr1o4tk l8zu+7fsmqt- 10rgab 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 thes8 nr0xzu/wq- ir surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a highe rwn8 -sqxz0/ur 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 i;bq/x fet,830x7ntmvd. th zt n the 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 direcq29s xhk5pq pac)0a30zzgdz9b -hg7 ztion 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 condwz1wo yyd2ha9) p ac:2ucting 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 a 500 V pote4 (inzi7 rqlb*-ysqg9 ntial difference. If the potential diffeqiyz *b9 i7nrql-4gs(rence 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 refe.+s4j;u*v 8ljxprxz vrred 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 poxt;2.cwyoo od / wk g51,zq9umint B along an equipotential surface.q g;xo.w o u1dm,ykotz 52w/c9

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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 beu.5l6jz otwkrc4m g8+

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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 caollw q ;ez(8;wj 6tw3znhw3 zt+8 i seef(3pv*rrying a charge equal to that on the electron as a result of moving8z3ev i f8 3towsww (ewqzj36n *zl+e;lh(;tp 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 aj-m- x h5k)skr2xeg )q:m nkx* 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 coj tt:6v9gdi/o8jomez5-qkn lg hi46r/b+,ck rresponds 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 cha*q1brxl ldz .0rge is 100 V. l* zdr0lq1x.b 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 poid03d)g8ht z xdnc105w6pg zyr5zjh 1fnt charge is -100 V. What is the absolute potential 4.0 m away from the sampjw 30zg)hddgyhf z6 r 51dcn8 5zx01te 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 char /rvk r8-4vanrge of +Q is located atvn4v/-r 8arrk 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 at the center of a square is 3.0 V whcd o w6/(ann91emk/c ken a charge of +Q is located at one of the e6 /noac(kmnkcd9w1 /square'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 t7i;i acb s12dbhat 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 voltco/ 0rno +wdr* 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 capacitors are i fscna,c(rf+ s*66 *fr2tb7m zha1p vpdentical in every respect except that one has twice sfsa 6pm f7r,n1a(c+zf*ch*prv26tb the plate area of 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 capacitor has a capacitance or3(rszj 9k- jwf C. If the area of the plates is doubled and the distanczskj 9(-wjr3 re 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 paa4hhtc k 1 twmhy:g9(8rallel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential difference between the plates as t4wtmk8tyhh ( hag :c19hey 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 weakend 3l-e ww(o ;ypf2oa,* we:dlved, the capacve 3oa:(w2yd,l; wwdp e-ofl* itance 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 constant vol9i hj*yci9 (rn. ldd +lr1u-yztage by a battery as they are pulled apart. During this process, t+1d .d* nl yrhuil rycz9(9-ijhe 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 ct:,zywsd qc+s+j99xf, en e-f apacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this pro,+ws + :nq ,z-e 9txsdfje9cyfcess?

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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 on3f uxk6q 2lw6+fz6wzf a capac zfzxnq u62k6fwl+w63 itor.
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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 placpcv*4r3)z; pv(eh ef zed between the plates of a capacitor. What happenspzr3 ech ;f*4pv )(zve 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 betwer arn45vpr 5qtaq28p9cu0z t1v k(n h4en the plates of a capacitor holding a fixed charge. What happens to the electric field between5p(tqr zrp0q9 2vtrkn auh ac8144n5 v 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 ful v+ue3z .* vurbn- f/y7u,hjzkly charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks ofr+u z*vy3un ,eh kuv7/- fzjb.f. 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 constant charge causes the enfi4gw03yx7 mj qqb)6lergy stored in thaq06fgl3b qj4yxwm7 i) t 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 that ybk:n 85dbod:capa5b:d 8 :dyonbkcitor 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 toqw0- gzb- 4zyo point B. What is the potentialg q-04yzbo- zw 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 pois g374orncakoo5w 8h4nt A, where the potential is -50 V, to point B, where the potential is +50 os5 hn4o g7worc43ak8V, 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 l rnpp;/pm9t*8x0td w accelerated through an electric potential difference of 500 V. What is the kinetic energy of the proton*9r0 ptwtppxd;/lnm8 ?

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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 potential diffeb m3t (g,zehdbs7xj5-yxd2(w rence of 500 V. What is the 7g w(s ymd, xz(j2td-3beh5xbspeed 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 difference of 5,pdhuwo:u: okv j18d 1200 V. What speed does it acquire?p uddjo1k ::,ov uh58w

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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 dkk+cqt0 .hnw( o 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 differen0ao7zqhv, y( xce of 500 V. What is the velocity of the electron 7,ya x0 vo(qhzafterward?

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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 m1g ;9si mt6a(vi,00qyl9tn r jigj:r 20 mC. The object is accelerated from rest through a potential difference, and afterward at:,j0lrg 06 qigvs(m tm99 1yjri i;nthe 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 byp(9) wsewxh to (( +qk;,govdetween two parallel metal plates separatede o)( v g,t( wpsk(+9xo;dyhwq 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 fie 4uw7--+lhbple 9qm cbld, with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, whatb74+hqpc-9l ul wmeb - 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 dire:t -6 9 2mn:l6er0apk abtlyvlcted toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a po9l2vn-a y:60lk:ml b tatp6reint 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 of an electric fi6.2(y nt nqezield of magnitude 3.0 V/m. What is the change in kinetic energy of thneyitnq 2z .(6e 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 con ea .nh4igd cs+3t,1qxnected 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 fr +isd.g 4ae,1qh3cn xtom 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 6.itmemd,i u y. * fncn4s3zv,0.20 m, are connected to a 12-V battery. An electron released fro3,s6fmyt4 mzuciniv*d .n .e, m 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 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 bap+stk0f, 8 xrorjm1mtd); 5cm ttery. 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, r )+;t80s1 tmmr5kdf oj,cmpx 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 -uy;xsi)2fn gy,cd8pvoltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a po-ny,cdx p ;)ys8 i2gfuint 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 the2*rk/u c2jvcgl wxs. b( *mi )lbik+j4 voltage measured relative to ground at a givei*l(j/xguw4)i2 kbcm* c. +s2b kj lvrn 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 5r2(yn4 8g3wps+ xcaiqkz7 mm acquire a kinetic enega5q2 r4(83s myc nmpikw+7zxrgy (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 ((t1x9 w c0oho(rrtoddistance 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 the electrical pote cj u9fp2uqv5x/n1z v,ntial for the center of the menj 2u9p1fu5vv czx/q ,ter 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 a6xl 0f8i*f0yw :0cmx h9fxcy lt (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 is the electric potential at point (0,0x8ci0yw:x6hfl*fx0 y c9m l f 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-nlx wr 6e5sk:x.C 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, 4.0w6 :.kx5sr xle 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 chargepf15yg u r;h2c is at (3.0 m, 0). If the potential is taken to be zero at infinity, hu p2 51y;grfcwhat 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 charg( v++ wl6 rb-nq 0c4lrsv:psvve +q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and+v+lvcb w slns- (64vq v:rp0r 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 +ap/e4 ti9y xs2jy7.0lmlmzi (4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.lpsi40(7 em mi y2/y9tlzajx .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 ys*8ra-y (ffpmj x s.0+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 placedq 3n+p hfe-yl1o/6u n three charges, each of 2.0 mC, at the corners of an equilateral triangle of side 2.p dl6eun/o+h1 q-y3 fn0 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 wdw ,gwatmiik9 :aen8.s1d (1 capacitor when it is charged to 100 V?a, w t:dmgis.dw1e( nk81wa 9i

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitorvu)1im ap6,hvz:em2 gc6;ov2 8 kyv yf 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 se6gikd5 vi yp7ncm ;*.kxj69m,smsl(q parated by 0.050 mm. If the capacitance isq 9x5mynm.s dips*;j 7lv,i66k(g kcm 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 hag0cu+omic k c tmn5v 0xowagd2(6+ py/e5;f,ys 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 ha/kdj+gn 0v/ozs a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potnj/dgo /+vkz 0ential, 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 c5)t4goeuxki4*s isdddd (50is connected across a 100-V battery. After the battery fully charges the capacitor, the capacitot) sk44g5*x deodc5(d0idisu r 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 on7obyqwk- )-nbw 3tis, a 15 mF capacitor. How much energy is stored in the capacitoq7 wwn,b oks-bt)-3iyr?

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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. Wha7 d.whf(w7 :a)hmuk jet is the energy stored in the capaciej. :w7k)hfau(m h7wd 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 the plates of a capacitor when it is connected to)(t fbqms zyr1m )opx)1pwhd /u-3)cx a 12.0-V battery. How much work wau xy3wmrs )qz/1x1))t(cbp mo)-p f hds 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 capacitorw7x0 eyjx6 4 wxescr.*n k)b9*koao*p is charged 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 consistsz)4rr 2h5 x/rf8ek vly 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 ofx.zuxm5l)tw0, u8 )r-b ne zdm 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 oftsd.xf7s qjziy j02. jw +:7sa 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 plaac .sl6u2w ria:ebn, 0te 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 witity nyyjur3*)x0*c j6h 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-g lo/+qc4gd+ oiez) p0c9 xk8tV battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space 4 ig c+cgp8d+)x0koo9/tezlq 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 battery an70bua daf:2rcojhi9 / d 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 constanor:au i/ hfjdba 2c790t of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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