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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 notf *uvt+ frik;4 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 is 9; . (iuish:f xabl)pna

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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 surroundingph )9ajofu5 mlc*c0:42zedi es. Object A has aue9dzec l op4 jfci*2)5:a0mh net 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 din gwx1txc8/2sub 1j l/5r ,:ijzam:l f+ll ,lqrection 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 electri5iaez7f f , tdgs2qa43c 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 plw*oq wm;w-v.d12z qeh7 c qvd gqt/k.)aced on a hollow conducting 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 6jn/:md ee*q sV potential difference. If the potential difference is changed to 2000 V, what wi6ejeqn:s */mdll 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 pointsl1f-d9u jkk9o;tsin: are at the 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 frb 4qx1z7 -jwboom point A to point B along an equipotential surface.7j ozb-xq14bw

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mu aif(ca xq5nd7j3rokc79 s1/xst 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 carr;pci*zwlk (ev51 mkkm d;7f*jying a charge equal to that on the electron as a result of moving thmz*;mjdk* v1ikl( w cpef;k5 7rough 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 a ulp7-r5vfe x;a nit 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 correspozi2- 2iaeaowjaop+d0gmxvl (76) f7 mnds 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 ch mb; x4+c5v(tzrm -qpoarge is 100 V. What is the abs qm(torv ;p+x b4z-5mcolute 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 o 5/v;y:4r8r leqpw adat a distance of 2.0 m from a negative point charge is -100 V. What is the absolute po yrvqe/wdr4 85 ;alp:otential 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 center of a square isiibae*7 ho4 -8.agf mkdji0ky +b2y* q 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 center when each of the other corners is also fimgd+* i j7-kab*hiy fo eq4 iykb280a.lled 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 Vj h9nj;oa 7whc 6vf)h tko-5x)4iqs-n when a charge of +Q is located at one of the squ9j-7ivc4fxh whhjk n))os; q5t6o- na are'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 cof0i dfla xogm3/ob999f8x oh 0nsist 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 is d -g:;:dlqyypyn8 u,fa

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate capacitort sl8 tt9cz2a2s are identical in every respect except that one has twice the plate area of thczltats 9t822 e 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 cs6 s +18mkydkxuv6,2oah fvf 0apacitance of C. If the area of the plates is doubled and the distancdfv6v6h+aou02x mfks, 1ysk 8e 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 removed. T )dnn t1;rs.vwhe plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the platrv ;n d.n)tw1ses 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 figmm2)*/fu vyo) rs0he capacitancesmfuoy/mvr)i )02*g f 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 s:q07 v4n cs+dkj-algvoltage by a bat+kcvl7ds4 -aq0 jn:gstery as they are pulled apart. During this process, the 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 cpm)8 jvqx1 pq;apacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the e)pqmx81qjvp ; lectric 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 dielectric material between the platerp2f)/ jep ;:jwxz,p1wpup j.s of a capzrujex jp,wf.:pj pp)/1;2 wpacitor.
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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 iej0f n e95tej9g8 et:pwzn 8)as placed between the plates of a capacitor. What h9ej f :98nn0ea tj8 wze)5etgpappens 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 betw+6jgdo uu:3 +8bt ossreen the plates of a capacitor holding a fixed charge. What happens to the electric field between the platesuto83gs sj:+d b6u+or?

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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 connectedu8b/uoksc hg 02rj.s3 to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that 8gs20/3.bkco usu rjhno 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 kyx4e4ck z*a8/nll ezg.0pn )w8 dqu. constant charge causes the energykn/g n)u0e lxedq. 4a wplzy8z*. 8k4c stored 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 kt,,p3i 3g 95 2 pww3.mzxc5nijdkxue capacitor causes the energy stored in that caki5dng tu9 xkwpjc,pi53, m3 xew.32zpacitor 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 tdekt*y k5t*;charge from point A to point B. What is the potent*tk5e*k d ty;tial 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 the potenc kmh3sdyhbm 37pod- 4g:7zr+tial is -50 V, to point B, where the potentkb zhmcy7rd: 3 +p-mg7h 4dso3ial 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 rpi o*vpijwn(7fza/ +2d2o(ipest, is accelerated through an electric potential difference of 500 V. What is the kinetic energy of the prow(p7o*i2d a(/z+jini 2 pvpfoton?

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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 accelerate say+vu i8pd4ipnb5 5;d through an electric potential differenc 5a5pbun;48vi dipsy +e of 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, a proton falls through a potential difference of 1200 a1vp)bvphc -l;5jn)bV. What speed dp;v hbvcb )janpl -1)5oes 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 iv v3 :,g5fvubfwmp4v w8sd/rgv lv 2m-ri;;l4n 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 difference of 500 b hv ;kd5k6qq 79p*1q,1kam;x kgnf zrV. What qbavxn;1r*gkm7qkk d kq h1 z69f, 5;pis 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 accelerated from reste)lybmul3+ v) through a potential dif)v)ym b le3+ulference, and afterward 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 two pavi s, 9phjus04rallel metal plates separated by 1.0 mm. What is the electric fiuj,90vi h pss4eld 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 magni-ba9v.f6wuaeg;zt7 wd r c b:0tude of 500 V/m, is directed parallel to the +x axis. Itwuw;9 : d6bgae -c7vb.0fraz f 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 ele9)7t 4 fehdxmo /-ah l-sk+aybctric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltsxa/ah9bhf-oy+dk7 4m)e lt- age 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 v aqx 9:kt8u azsak +tuuz+9rgp892c4 of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the r aacu+8gu8s9u9+p2kt49zqx atzvk : 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 cm . :: cufrip3trfm9f*onnected 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 from the positive plate, what is the potential difference between rf9f3p mtm r ::u.fc*ithe 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-hktmye1q 9 .b+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 positive plate, how much kinetic energy does the.qb ym kt91he+ 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 connuo z1d,s 2cut9 c89v li;fi9afected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plod 89 csif2ul t;i9fzuv19,caate. 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 el.8lsi.r ufx, ast. If the voltage measured relative to ground at a given point in the field is 80 V, what is fx.l ir,8.lu sthe 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 electricw*i ut:xq(t(t. 0p9fc 3/bfuxk 7cljz field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, whf709x/cl qtzik.uw u(:p*cjtfx3t b ( at 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 k.vgio0g4x gn(hjp9s (xd u/8d inetnx ho g/x(gs 0vdj4.gi(9p8ud ic 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 i*r ef ucr+ 4b2iqas95distance 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 met8y pwfg.-lzy)o1j*n y jkgix ,gj; 7s2er stick. Find the electrical potential for the center of the meti gs1p2.;zjo jj*g ,ykf)7x 8gyn ly-wer 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 czua2w1) bn:ryharge is at (3.0 m, 0). If the potential is taken to be zero at infinity, whabraz)wu n1 :2yt 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 pon 0..e, w6hug,cs cqzu/vpv d+tential is taq, / u d,vvuwh.ge+c.z0sp nc6ken to be zero 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.n,:ubht0 2:w- in oazj0-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 charge from infinity to point (0j2wa0 n,z nbut ih-::o, 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 rectangle d+3upol;our( of sides a and b. What is the potential at the center of ;udo3r pl+ uo(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. Charg*z89 qzsv9p+ e nlod+des of +4.0 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 thed 98znd9+p+o* levzq s 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, ms5vramc-+g) 5su k5oy pa;dcz+/+ mwhass $6.64 \times 10^{-27} \; kg$) 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 ch.;xkaftp oe4kk,7h1 g arges, each of 2.0 mC, at the corners of an equilateral tfhop17k t;4x eg,kka.riangle 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 ise--o/l3zun y eswh,m/ charged to 100 Vo/yezulhm- 3 n -s,/ew?

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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 avri96 sfkhqy5v +j c5;rea $0.50 \; m^{2}$ 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:n t p,:qodh(w by 0.050 mm. If the capacitance iw: ,pqdn:(hot s 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 has kl 19ro:z*f*pant(ers 9.pg zplates 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 separati/m9ka m k6c:yq,vb+gnt/xs; von of 5.0 cm. If the potential difference between tb g,/ vkx/qv+ymnak smt:;9c6he plates is 2000 V, 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 capacitor is connected across a 100-V batte)clii01hxz s,o 17fn ery. After the battery fully charges the capacitorlxei7o1 0fzcn1i) hs, , 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 capacit 0bt; )ipnwa2y9zl()zmruc 5nor. How much energy is stored in th9;c )my 20ri nwb)zznu(t 5aple 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. What is the wu gfxbhdlx xc()8*d-,.h 6pl energy stored in the capacitpd,.x(cxx hgb -u lf w68h*l)dor?

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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 connecth3 gt*t;fg4woed to a 12.0-V battw*gfoght;43t ery. 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 iwrw2uap 2wdxuk((w qg *vb(17 s 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 capacito/q h*1-y(jz2d 9iespst 5jnxus* ukk7r 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 cs dq o-g 75ilvs5n)tt)onsists 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 crpi l.ygo46z38v1w d 8i mow;yonsists 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,8sw 4dov9c+h- i c0 dipvtph4 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 c+ b7ni-lda 3i, j;fwpn:p ulu4onstructed 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 conne4o)vjie .* svl8d aa+icted to a 50-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 dielectric constant of 5.0, what is the capacitancel+) 4*iesva. aivo8j d 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 bat1vfp80 yc7+(vdmu qudtery and becomes fully charged. The battery is removed anpqy0f( 1+uc7 vvdm u8dd 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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