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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 followi(5* qniyvo)1m 9t7b echlfjd.ng 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 coulombk up )2p7i(sgn 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 insuq/3l dht4 gnq x nw-)pv;6y/velated from their surroundings. Object A has a net charge of excess electrons. Object B is grounhvlxvnwd gq 4 3ty) qe/n6/p;-ded. 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 elf a1l,2 ;ldsamectric 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 electricpx6 bevtp8zn70, vbs9 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. Theykk5 l j-2pelt5dr./tf

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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 v2w m*koq+9h-t3y gp espeed v by a 500 V potential difference. If the potential d -yv+mt e*gw9ohk3pq2ifference 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 isi )sa3zt e/x3xrz8 k+n 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 along an equipotential sur 13oy* rbqu4xhjo 2e6qc5,rz dface.q*r2 djyxh65c e q1ou3zb4,ro

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential sur1hvryk iz6 :h.face must 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 e+nrg(v .(8wiuj 1q u1qtmki(z qual to that on the electron as a result of moving through a potential difference of one volt is referrenu+ ii.r8 t(jumvz( 1gw(kq1qd 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 .h9 dn),cb tjpunit 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 correspd 30(r6ixnues*i k6vyonds 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 atonum+57:dp; kei:8 g1qncp xp a distance of 2.0 m from a positive point charge is 100 eo nqk +d8u:7px5:cimppg1n;V. 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 distan0mfv6 evc9:m ece of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4v0mm 6 9ce:fev.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 c0vggb 9k:yg/ w8zfnc5a h.2 tmharge of +Q is located at one .z g/ :g9a2vyw cmbhk n5gt80fof 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 iscux0-y*conl4v pq,7 x 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute pote,0qp x4 lxo7cyu-c*nvntial 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 y+;: j;ok bqwfpau;r :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 ka ar1 2oryg.m aw)2/c,b aya:dahb-3a

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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 idento,yg-halt+l.bs7n . b ical in every respect except that one has bn +l7tg o.l-b.ya ,shtwice 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 capacit6/ :szx rdxg o 4wmxzeow4+08yor has a capacitance of C. If the area of the plates is doubled anw/ +me z4x0:ozswxyx6r8 4odgd the distance 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 parallel-plate capacitor fully akc1j7avdzb873 d sv8lzuzp80nd 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 they are being sepksba30z7vu 8czv8jdz8pdl7 1arated?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric fieljul5 cm ls),x3d between the plates of a given capacitor is weakened, the capacij5l,)slxm3cu tance 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 voltage byx( pm2gm8mr ;u a battery as they are pulled apart. During this process, the amount oxu2 gp;8mrm (mf 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 capaga+9 xx g4sdtk (s9 u4w2rv5qkcitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of therq (9sx5wu 2ka4+ 49sdvgt xgk 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 ads.;xkva c xsl)2uo5 t7ding a dielectric material between the plates of a capacitor.7xu2savo x5tkc l.)s;
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material bl+ mc m.eakg z5-g-e8such as paper is placed between the plates of a capacitor. a 5 -lcezekmg+8g.b- mWhat 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 paper7 -t8 imm.lk55ozjtmr is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between th75im ztm mr8k5o-.t lje 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 behj/jnoq0.l) mra ly59x .m4q sv2ssa3comes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no cjrh 20. vnox )9qj4/.mm35l slsqsy aaharge 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 constant ch)q8 uv*bg1h-bk y ik1large causes the energy store )ib uk1b qk-v8h1*lygd 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 cause+. r *ugiwui9kow4+gw 0 ch3pms the energy stored in that capacitoug uc4w +r3wgmw ip *0h.ki9+or 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 p xf( yrk d80du6b9;ctxoint B. What is thed k9rb x6;y8(0fdt cxu 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 moyi8bzda ;,wuh mn+(ddzlr3*xb4 3 2bi ving an electron from point A, where the potential is -50 V, to point B, where the potentb idw* b23n hyl8,4; z+zi3a bddx(murial 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 accelerzt0w 6 .xejoh9f2ls, rated through an electric potential difference of 500 V. What is the kinetic energy of the p 9sr0lzfot.w2hx6ej, roton?

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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 acceleratt92-;t c5c yrj93yivzih fwh /ed through an electric potential difference of52yh39 /fz9c thwr-; vt yiicj 500 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, -7nim wo2f4 y/d,v,fgt ngmt.d dy./ za proton falls through a potential difference of 1200 V. What speed does it acquidd d 72t/zfm ,m.gn4-wyn o vf,gy./itre?

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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 movimp,6hhjho+)6ncv) a cng $8.5 \times 10^{18} \; electrons$?

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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 difference of 500 V. yhs(5i/h jafhe6 nnrstc9m 7.g,: q;a What is the velocity of the eletjhsm:ah9,iecq/ 5( .n aghyfn ;7s6rctron 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 accelerated f ,xpf4sp d34dko3dh0jrom rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential d3x k o4dp34,ds0phfdj ifference?

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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 paralt:4jtzs.;0jrg9 f x tylel metal plates separated by 1.0 mm. What is the electric field between the platesjyj4:sxz9.t0g ; tr tf?

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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 magnitu:k sp(+ w*ajsdde of 500 V/m, is directed parallel to the +x axis. If tds +p*k sj(:wahe 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 directed toward the east. l pxp6*t c(7scIf the voltage measured retc*6pc( s7l pxlative to ground at a given point is 80 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 direction om/he rb/bl:d69ke76 9 s fwwwff an electric field of magnitude 3.0 V/m. Whatfbw 6 /w7msb 9eh6drf/ke 9:lw 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-V batter ytg s0;8 mj33xkc1w ;ehvsf7ly. 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 betss3t3 w1mv 7fykj8x e gh;cl;0ween 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 e7fi: us g +i)k1tdt:em, 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 pos sg)iidf7:1k t ue:+teitive 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 battery. Ano31nvcoq ryvv:a )0 b, electron released from rest at a location3:o)v1 v,q0 rbc nyova 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 electko)lrbfdtv4d4l g:lz5nziq+z.-- ,vric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field-ordz.vztll)fi kn-5 zqdv 4 l:b+,g4 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 east4qmml 8 ydd;:xk m0m7t. If the voltage measured relative to ground at a gi7 y8x ;dt:mdm0lq m4kmven 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 poteniq6p4ytnu; .m7mlp *x tial difference of 12 V, it will acquire a kinetic energy (in the absence of friction46l7nq;itxup . m* pym) 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 distance ptkr+ ije g)l1z) fd.; ea0u9aof $5.0 \times 10^{-10} \; m$ 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 me o+yf )tp;q8pvter stick. Find the electrical potential for the ce fvtq;)o8ppy +nter 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 8i15 4rqo j8cehmxs0v (3.0 m, 0). If the potential is taken to be zero at infr08e4 1v58s omqcixj hinity, 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 - au9c9i(z5 cvvj.ei8u2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric j ui9 zva(c5e.9c8ivupotential 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 th ww4vbihn2d7*53j mahaezu8 *e potential is taken to be zen zhu5e v *b487jh2*wmidwaa3 ro 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 chargegt l2- tx0jcf z/t3-sm +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 b = xj 03/gtcz-- 2tsf mtl4.0 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 ahbs/mjq7-v b6 side. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed ch - qjvs6/7hbmbarges 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,p5un s kqep.;qq*k39u 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 ofm-oz:t kko 6;v+fu7t f 2.0 mC, at the corners of an eo7 f6kkzf- ou: ;tt+vmquilateral 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 pla vou))vfha l: sxry,44tes of a 2.0-mF capacitor when it is charged to 10u4v)sfyhxv 4r, a )ol:0 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 capacitor has o3bq;8q+a 5zgklmk;rg ka-(oplates 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 sepa:y2th *v +2w1bfrvvpv rated by 0.050v2pvf:t 1 rwv*+h2ybv 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 y9urmclz73t p *8/efdhas 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 separation of 5.0 cm. If the potek7kzoe4 ./h1ws2ecs wntial difference between the plates is 2000 V, wit/ 7.ozwe1kwe s 4h2cksh 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 battery. Ax2dc3 (r9o:buq 1oz+ygby uu+o 78hmwfter the battery fully charges the cau2g xuho:+yqb o7 9d1(3mu yo8 wrcb+zpacitor, 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 pll/i 9p+)acfim ;vc pyi3nqf39 aced on a 15 mF capacitor. How much energy is stored in t+a;i3cpmi/9icnf3v f 9ql py)he capacitor?

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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. Whatsre -xpxw: v8(tdwvkb1b o .2/ is the energy stored in the capaciwbxe w.b :t/(x v- 8opds1vr2ktor?

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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 /bvzo rvwn8+3to a 12.0-V batter8rz vw3+on/vb y. 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 isu )d4s s f7ww*q5nch()ssbn(a 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 capacit4y:st+nwxg+ sx m.zt-gye8 -xor 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 capacit(2r;bt 0j pep;ii-wz vor 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 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 plates of b0 4stusqj7n y:( b:j0s-qqd 12kqutbarea $1.5 \times 10^{-4} \; m^{2}$ 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 con 4*uy.xv*ejg sstructed 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 capacitheswia/2i+g0 e 5/c zr.e:k jcor 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 battery and be9po e-ghp6hvow;azarw ),9* e5h)huscomes fully charged. The battery is removed and a slab of dielectric that completely fil ph e,z6u 5gh)wvoo *whs9e;r 9ah)-apls 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 batter0gk ofzec35oa7vthyc0 i;e- ) y 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 voltage across the capacitor's plates after the slab is inserte3-og0k;e 7a0ocvet )ch y5fzid?

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