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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 not fb .7wj1ge.d)2n kpbp45l aw ba 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 i znpqt8 5+id9ws 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 iwvxb8 lg l+:;.9 glgcfrom their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is gvlllc.ig + w;98x:gbat 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 el 7gtw) nbs(*viectric 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 tady5q1 d8 2blpe (qt)jc7gi b5o 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 sphere. Thl-r4het2 sj.ws(;ac 9-nkpjj ey

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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 bcael05-su -gll;/ i liy a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of thelslgl5i elu/a--;i 0c 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 2x s*zh6qcrg2p)8 wtusame 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 Al1ab h sc3d7;g to point B along an equipotential surfacebl gch3;1d as7.

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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;e hcmrn awc+ ,fr 6(eskfu 2u7y5+1ur 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 bh r9si /8n iswel/wn/,tq1,mfy a particle carrying a charge equal to that on the electron as a result of moving through a potential i, ,lwt/8nf9/rqhe/is s 1nwmdifference 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 a uni9rip v1w-i1:t/ )yxnsqb *clnt 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 cor.lbp3rx x/by/glzb/ 0responds 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 at2v0s2h drk c4n a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m ahcd s 2n2vr04kway 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 negativ.ak 1 x(qxumxs2nq9c9e point charge is -100 V. What is the a9x 2u.x x(n19mqk cqasbsolute 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 c;ojg 7o +h7c -flcbwz7enter 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 cen77j;hg -c blzo+c7wof ter 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 thee8j;w so8pgl- 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 squl8-8gwpsjo;e are'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 consismd*k lnr4d+1be 4sq0n t of two 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 6*3uikpoh wa qni9 )de:gaq.7is 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 idfjx 04sn.zdw+4:* mrn qokay*entical in every respect except that one has twice the plate area of the other. If the smaller 4 *mzqnx.ry ajn4 0wk +*osfd: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 lzg - fbdnu/l 8w/e)*zthe area of the plates is doubled and the distance betw w8/) gz*f-lez/dulnb een 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 full.bc) 8wbnczq*q +85y8gc sj g :/yjjoey 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 thqeb8 :c5 b8zj+o *qc y.gn ycjw/gj8s)ey 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 capaci/ e-7daxjic1 mtor is weakened, the capacita d1ja-ix/7em cnce 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-plat yibi,fy.ep+2a .n km-e capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of cyi ,f.k+e.2n-ypmbi a harge 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 constant voltage by i rv*(/qv;vp3+,pwinxglil/ d hoe1) a battery as they are pulled apart. What happens to the strength of the electric field during thirh1vl+qviv,dop3/npl e / ;w()g *ixis 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 dielwdc5 ,frk42 ma8pzgf2ectric material between the plates of a capacitor54rk p22 a,g wzmf8cfd.
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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 betwes c9fri-w6o qg/l w8r+en the plates of a capacitor. What happens to the /fs gir9wo8+ q lrc-w6capacitance?

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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 between the plates of a 7er/ve5l9;fec:f a xpcapacitor holdi /ec5:x9lr ae7ep ffv;ng a 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 fully chargeo,e b bm,vt0d,d. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy storebvt,d,o ,bm0 ed 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 cop1utxu2n/sd po j2pz(k9v0 e, nstant charge causes the energy stored in that capa1d u(p/ , xvtus90pzn 2k2ejopcitor 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 energyx95 km2 m :7oon0ayjru stored in that capacitoram0x7k:5nm u2yj9 oor 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 -w)) s;f* 4hu3afxizn epdnv;charge from point A to point B. What is the potential difference betweh;s-f)w4xe3izf ) vn*dun ap ;en 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 A, wyg 73g -ddl o1 c1/nn8keub+xhhere the potential is -50 V, to pointc7dbxe n1-g/8 ho+n3 gkl1 duy 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 through an electric potur07,quuprkafp9iw )r5bs -yhofw -0z+s , i-ential difference of 500 V. What is theu,+7rb) w-frq5 upi,zw0- ifkuh9rasy sop-0 kinetic 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 ac r:4h1aamamk-gs w 8g. fuu30ocelerated through an electric potential difference of 500 V. What is the speed4um30k.m-agws hr a:1 uao8fg 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 differenclxpyyzoivh02c5 ev k2n/ 6;t 8f ;w2qce of 1200 V. What speed does it acq;2cz2oqw 68tx05c nv2 h /pifv;ykelyuire?

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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 movin. wm:n6lbx al9g $8.5 \times 10^{18} \; electrons$?

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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 86r r)i as*ngng b2 3qj3cd2hyV. What is the velocity of the electron aftegj i)gb2nhr*3 n y8qad62sc r3rward?

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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 obje) i3 1bhgi. gfnoac2z lr0v1s7ct is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What vr )o za2isgfg1n.10hi3b l c7is 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 maint 6r2txm ,gt: e/jl,laeains the electrical potential difference between two parallel metajemla/6et,: 2lgrtx, l plates 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 field, with a m 1n3t2jkr-iy eagnitude of 500 V/m, is directed parallel to the +x iey2jnt1 k-3 raxis. If the 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/9c0y) h/s(66 q b1olgqr3heyacwt)s m1i rx8m C directed 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 di 0e mxmcrsc bh 1 /6yhg s3q)(qi9at81r)oyw6lrectly 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 field of magnitude 3.0 adp9p8wbh*tyy:r1a1+b otv0 oh) ho/V/m. What is the c0t 1 y +b*oh:pd981w/rhbo)yptvaa hohange 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, hg , mr.gw/ya.separated by 0.20 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 ergy,h/w. a.g mlectron 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, f9yer5uit1e;z5g) r zseparated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m g5ryefei;)5z 1trz9 ufrom 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 batg9z vbtgulj.k. 3g 6.ltery. An electron released from rest at a location 0.10 m from the negative6 gg kt .vl.ju3z.lbg9 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 /h kz9gys pd*zdn,u/ 8x5bck0toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.0 m directly east s*/p9dn / bug0 ,hyzkcx8 5zdkof 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 ;(qim:jl/v s d2dh+n80iwip evoltage meqnd/ msh;+ldiv08 p j2wi(e i:asured relative 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 willnjw - 3hye/h9;,rvmn t 5e.hx3ewy gu: acquire a kinetic energy (in the absence of frict y 53vumgetn3r-ewxeh 9y ,/.h hjw;n:ion) 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 l7p /hicdi4(x f2h x.h- 5surrof $5.0 \times 10^{-10} \; m$ 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 tnk 9 dt arf,v8bsmim/)v;o80f he ends of a meter stick. Find the electrical potential for o;nkv0t / mfb8ia,s9dm8rf v) 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 a -2.0-nC charge is at (3.0 m, 0). If the potea5pu4/vh( ov bntial is taken (vvop/bu4 h5a 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 charge is at (3.0 m, 0). If the potn z;xw/r 75udtential is taken to be zero at infinity, what is the electric potential energy of a/t;nd ur x5z7w 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 e( (s4gf/ea69 yqiejf nex* l8at (3.0 m, 0). If the potene f 8 g(n/ej6fxi*l4se(ey9 aqtial is taken to be zero 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 +q z3bt4ey5v) uk are placed at the corners of a rectangle of sides a and b. Whteku3yz5 v4b )at is 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 mC are placed in two diagonally j4y92f/tzq ( s8 w rbvg0 0qrq yr9trh2t(hnq)opposite corners. In the other two corners are placed chargb(zrvt 2 w8jhqf sg9r0 qq(ryy/)t9q0 2hr4nt es 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 (c (/ lznz/z )y zde2bovrs/ k*pfs14pm0harge +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 plac fiiz e:k7;:c)e r;mvoiayxm4 (z-j z5e three charges, each of 2.0 mC, at the corners of an equilateral triangle of side 2.0 m z i5-rzm;ej :(:f;aexykioi4 zc)v7cm?

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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 char6.s oid :k).ptl vz1pu (y8tcyged to 10cv18 oduy6p)(tp :y.ksz t.li0 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 plates of are*iffesd q s/6)a $0.50 \; m^{2}$ 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 ai7wmr9byus 4rw,b8vt3j- ib6 xkh 3e6ir, and the plates are separated by 0.b k-6y 3 xi7m6w,vuirsb bt4 w9r8je3h050 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 capaci7r;ljl ic 3c8itor has 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 t*( nh,co qdf9ihe potential difference between the plates is 2000 V, with the top plate at the higher potec,i (h on*dqf9ntial, 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. After the battery gs .o9i8cveoy6c94z pfully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which is9zcop8yco .g6 4v9e 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 bfxp)wo2y:x;eqr 5j2c3mo)i 15 mF capacitor. How much energy is stored in the b)y) 3;5f 2exopcqmoxrij2 :wcapacitor?

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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 q: vr4sch 2:o/gi:suc the energy stored in the capacv:::2hcu 4c/goq rs isitor?

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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 e2 e4hm zill1d2k1mx. the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done i m1d1k42xm2 .zle helin 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 st1o 8j6u6n1v2mrngmn bores $2.0 \times 10^{-3} \; J$ 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*sg 0i8z nbmc d+.t0xns 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 ofz*y/lc0 sll7 p 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 pla6 lh j 7;6nduni:k,-m :) qci9ojzxwsqtes 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 :rp;sz:tgj 4i is constructed 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 construct;qtr(k3- euu4zjr1o3 zwb,s ted 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 5uju,x7 ym x ,th0q,slfx7+z1s0-V battery and becomes fully charged. The battery is removed and a slab of d,xfxs7 ,jm ulqy07zh+,s x1utielectric that completely fills 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-k hr.f11ko 4pyV battery and becomes fully charged. The battery is removed and a 1y41k pfkr.ho 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 inserted?

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