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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 followi8dqu548fd0 kd hz lm)wng 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 coulomb r qy04nl4*zkzis 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.-h8p wgx4p*sw kl; n/e Object A has a netw*-e pkhsn 4p;w8x/lg charge of excess electrons. 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 the directions 9m .qatq,j.h 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 dir*k9 8f3 jwtlluzj:gb 6ection 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 condu 53dfsl0sr ch(7epi( kcting 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 sd*6 kjbdr0c 0y2e +wd500 V potential difference. If the potential difference is changed to 2000 V, what will the new speedddwe rd2k 60cy+0b s*j 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 pocbv5(zrjrw ft9 + -qmv)5z k/ytential 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 to pointsj ,hjwq18bq 0 B along an equipotential surfacsqh0q1 j, 8wbje.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mukhe5vjw6b6wd6 )zw.y st 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 that on the iz sr 6rg:a9nnu 2m/u8electron as a result of moving through a potential differenc au6rsnu/rz :ng92m 8ie 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 unit 0i9i;ooik ua5d+v0tv*k mx5d 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 corwr d2y7 8-trlvho )0ahmo2emx t; xe64responds 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 7z l30)a: / xmwpr 8cqyiqwoq3from a positive point charge is 100 V. What is the :qi a/8cz0 l7q3 w3)yrxpmqwoabsolute 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 poiul+j y0-1w mcv7k5 hyp4rgz; rnt charge is -100 V. What is the absolute potential 4.0 m +vy4z-y rrl um;kgw0j1cp5h7 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 ofkfzy7flrx6 x c /f;+v+ 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 squarc+r;7+ vx /fkxz6ylf fe'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 oqjzv-)i2hqq:.;e ij3.0 V when a charge of +Q is located at one of the square's corners. What is tho)e . jhjqiq: -2vz;qie 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 thaa3b iuldu 5i2)t 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 isuevb efa07: ( xbv3swgql6ry7 4/x;yh 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 identical in every respect except that hcla;nrj udjxw85*2 a 2:2: iop 4 5un3hetbskone has twice the plate area of the other. If the smaller capaci:p nu5sl5wibeuh r23n;ojd284 h:a k j2 xac*ttor 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 capacitoryiguigd;5fpe 9uv rco.m ,(,8 has a capacitance of C. If the area of the plates is doublr(my,e gi.oi,9 ug f;u8pdv 5ced and 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 and then is rem )2muj g-4gznq1hv (sdoved. The plates are immediately pulled apart. (Witg4 s1huzq-(2jn ) mdvgh 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 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 weakened, t) +pyojqk58 erhe capacitance of that capacq +)8eprjyok 5itor

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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 volco))1eal i z;ctage by a battery as they are pulled apart. During this process, the aml ) ;icez1co)aount 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 mainta xp1h77v +7bu,wvdxs 0hpq:sp ined with constant voltage by a battery as they are pulled apart. What happens txpsw0h1bvu:+7 7h x7p q s,pvdo 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 a: c 3rcmgkil)1dding a dielectric material between the plates of a capai c) k1:r3gcmlcitor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric materiaat*q1 t1d,f hkl such as paper is placed between the plates of a capacitor. Whh*td f,k11taq at 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 paper is placed between the plates of a caf8r -ni. lih- 1qj3j;gfwa yfig+ c*6upacitor holding a fixed charge. What happens to the electric field bet-fgqr;i+j1aifjly n3 -*h 8c 6ufi g.wween 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 ba pk+g.tjq/ m joj;e8e3ttery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is eo ;qj k jgpt.em+3/8jincreased 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 holding a const56r( vcll:y azant charge causes the energy stoa y5zlcl:v(r 6red 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 acu*idzosp2 x-: iyg,bsyh9 +4fross a given capacitor causes the energy stored in that capacitor toihisugp fd:b,y2+4s z -y9x*o

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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 topds; rgm8m*gm6ii .6o point B. What is the dsg mrg mi*68p6 mi.o;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 moving an electron from point A, where.q40pna3uaon h.*k bgi z/gn9 the potential is -50 V, to point B, where t*agh.n. b izgnanq9k/o 40u3phe 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 accelerate q wv u8,n. oy3yj.r7djirj75)a +fbizd through an electric potential difference of 500 V. What is the kinetic energy of the proton?qjir f.nda7viyw7r 8 ,)+u3 .o5yjzbj

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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 accex rw6:+ hq+4r+hpweub 0bk s1kp9e-dilerated through an electric potential difference of 500 V. What is the spekh +wp6+xhr9 ubes- ierdq 1 p4b:+k0wed 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 1200 V. ft tq.r9vvj;8sg3/ caWha vg9 tj;ca.sf t3rv8q/t speed does it 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 vh/a/ 4vmts7t3.khz i/ jta3win 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 th /plyi gs-x*2asyd 9ts e-t0.erough a potential difference of 500 V. What is the velocity of is sg. d eyxplt9*s--et2/y0a 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 accelerated from3 8ky7 5nhkppn3bn(ox rest through a potential difference, and afpby n3knp5xno7(h8 3kterward 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 the electrical potential difference between twoiau37 u2b mj2jhlb:lb/ ke49 t parallel metal plates separated by 1.0 mm. What is the elemi3ul24tb9/: baj7 hujk b2 lectric 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 3b ,k0n3hf cm 0 1z(ajllbs4goa magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0hsm,0f4n3l gc0o3l a(z b1 bjk 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 electx+ij.qi 4ug ovd1gk((x(cw l -ric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given pog wxjodg .1-ki(v(i+4(xqlc uint 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 of an electric field odur(rw ct15 4m ,gh3qc+vhr5 tf magnitude 3.0 V/m. qgh4cduct(r rvt5w rh5 1,m3+ What 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 batterf* h3lgrr. ,huy. 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,3hfr* ru lh.g 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 connected to a 12-V battery. Anmx:0ib.jak8:xbol zv:k0 o c 64iq3f c 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 tm4j:0 b k 6z0l qx:ivf3ob.o:ckc8xaihe 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 12tpr8kg.b rk)7 zha1jq91z/ez -V battery. An electron released from rest at a location 0.10 m from the negative plate. When the eh1ae7.1g zr)9 zj8kpzt brk/ qlectron 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 u,d cou e383hkof 50 N/C directed toward 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 of the pod3ou u3k8ceh, int?

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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 eastj/1 lw/bpy f;2 :r 2ovj;wjyav. If the voltage measured:v1 ob ljjjwwf/ pr y;a;2vy2/ 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 diyiwq9f-pat0 0fference of 12 V, it will acquire a kineticatfq0-iywp 90 energy (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 dis/wtc:7 ywi33zxqf9 gbtance 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 th5 ,. vekayn1fje electrical potential for the center of the meter sticjyven, f.1k a5k.

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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 (ga0 dq hl 4*4k+jf7dda3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4.0 h 4 dld0j7+*kqag4dfa 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-.ohqs; s 5lls at (3.0 m, 0). If the potential is taken to be zlhlo5.; sssq- ero 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) apbt)51 /cljwwu p1mw/nd a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC chp5c ww tlj1m)wb1//puarge 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 at the corners of a reestu,e7d3)f sctangle of sides a and b. What is thte s7),u3se dfe 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 mvwf7ug21 ; pu56q bmxtC 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 p67up2 v1xmfu;g wt5 bqotential 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 +2ei7vo imxj49hy1 rf 57qln5po ), 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 thj/pvkyzj h6uqw20- . af 2:keoree charges, each of 2.0 mC, at the corners of an equilateral triangle2 2:6.hufyjeaj qk/-zvp0wo k 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 whet * b1s80spyhpn it is charged to 100 Vbtpy hps0 s81*?

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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 4z uyqek*y3d-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 separated suv d-msvdytflx+ 1 ke;+8llqca)00 *by 0.050 mm. If the capacitance is 17.3 pF, what is the 0s+* k-l) qtu lv01fxsddm; vae8ly+cplate 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 hasi q 2 -hhd*a/uwj8y;fd 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 yz0 ;p7.slikrn(9 2-z-7dpct dpiqid plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electziycd -l70.z pst (pqi;rdpn2 i79 -dkric 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 isi36/w. xdohh c connected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remained co w3i6 .h/odxchnnected 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 ,l. ryj323putlqj *qr. How much energy is stored in the capaj,.23p 3rrqqtj ull*y citor?

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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 the energy stored inbp v7pc 21 ce;foxt0)a the capacitor1cbe )xpoa7ft ; c0v2p?

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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 connecteoc 9t, lzo1cp,dhg93 td to a3zpc9ot lcg1t d9o h,, 12.0-V battery. 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 capacitorl2(jyk0fp;o( i6 etc x 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 consists of plates of h i. h.ghkjmu1(b,9(u0 fichd 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 conlm ,2nmtsq3h6m:jjwa tyclu :.f+1n( sists 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 consisae(9 e;5subp6,u9,lk;8oj fc hpto f gts 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 consy15q (b w1ajp5e)eqvxtructed 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 conkh4u+( e1 pcbestructed 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 batterr in*p r *(muy+yehe:0y 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 capacitance of the ca0hum( +rp *eyi :y*nrepacitor 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 tol 7aqsfj 7cm*ie(:jx0p,ilc. a 50-V battery and becomes fully charged. The battery is remclmlc.j7: e7i j0* xsqf (api,oved 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 inserted?

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