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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 a vey1dl,2 jy3v 2y iljmi,ctor?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombsm)w8 o+p3vbeoc1e+v aqz) *i 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 t s a,y wmty827-iasax0heir surroundings. Object A has a net charge of excess electrons. Object B isaa2ms0-as8w7 y xt y,i 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 directioncm0*k r)d4qu g+z /2vgej/wi :duhy9x 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 electric fiaail c v0ohn 9b51zg)dc;j(/eeld

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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 homexie08+ 2uz allow 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 accelerat*i(n k yj62wuwed from rest to a speed v by a 500 V potential difference. If the potenti kwunj( y6*2iwal difference 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 ref(ll tmwtlfp -g5,p8 e5erred 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 alon5 e2 tcbfp7vmtv r711k bh:j5bg an equipotential surface5t evh7 1tvfrj bmpb1cb:72k5.

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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 be :o4( 5wifsnbc

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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 partiz-.a i/qcte -rf x* evsdo4;p l;5a-ctcle carrying a charge equal to that on the electron as a result of moving thafo;t;-vd5 aq irs/ zce.4xp-et - c*lrough 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 unit ofabu1hksd3z.k6 basw k+:kerp/7.lsb 8 g 9:jp

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspog+m(0p ad z:,oyxrxin 43(ihends to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potentialp3zwt+m r*qi 5 at a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potentialm zp5qw+tr*i 3 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 point chh f;sxf //p o7 eo2brnwf 5dk/,p6rzg5arge is -100 V. What is the absolute potential 4.0 m awadz f nwo ;,ekpbr/f/os/76rf25 h5 xpgy 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 cev)k7 k4d 0bolx:1i4tbrce5ylnter of a square is 3.0 V when a charge of +Q is located at one of the square's corners. Wha1byk:vldo x4c ib50)k4 ler7t t 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 c3xx ndt j3vk c62xe,lu+/i;scenter of a square is 3.0 V when a charge of +Q is located at one of the; ,x3/clxj vsk2dc6ie x t+n3u 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 char k 0 eqtri18v6k+jb qc8foc+(tges 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 a2 i8deyuxx2du08tr- 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 c 9oxp/ za-e,ls.+ megu)s:k nevery respect except that one has twice the plate area of the other. If the smaller capacitor has capacit ms u -9l.sn):+azkcgp o,xe/eance 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 ca uyd61dqswqt*:- :ms(on8r z wpacitance of C. If the area of the plates is doubled and the disoq u6*y8sdr(wn 1tsq-:zwm:d tance 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 paral6qt. 0r9ue:w trip z.slel-plate capacitor fully and then is removed. The plates are ip96rzr0 sq .ti:t. weummediately 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 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 betwok 92sj5 jkk)heen the plates of a given capacitor is weakened, the capacitance of that s)925k jhokkjcapacitor

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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 + 3d :52.(lbwrbl(h 16 pqmevozsfcyj f qlh8)with constant voltage by a battery as they are pulled apart. During this process, the amount of c56w2hcrevbhpsljq. l3 (8 1qz yf(mf) b: +oldharge 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 volt l(./+exlikc+uzv mtw4dg .t)o zda73age by a battery as they are pulled apart. What happens to the strength of the electric fd4(z.t3k vm+u i. + w l/eoz)d7glctxaield 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 fodne-qt0s /c , /vzdte*r adding a dielectric material between the plates of a capac0dd-*,e /zt tqscev/nitor.
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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 betweenussv pb) 45-4yes,jrp the plates of a capacitor. What happens pbrs-psy4 ,veu 4)s5 jto 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 ccb3f7 e 3l3u fib+u obrg3xm3a b4c:1zapacitor holding a fixed charge. z3+fibm ec rubg3 31f4bc3a:u 3b7x ol 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 ch 7i 6k d8zoisviuhw (sk +:sia.360rmearged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored in tv. ( i87ews:6r 3si kki siadz0h6umo+his 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 holpoxs./ej rx+3 ding a constant charge causes the energpe3/ x+js. oxry 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 cp-b 7m ovd3qi.m -n 7bbo:9tgb ui0*dxapacitor causes the energy stored in that capac7g 9o*p:7bidutox qi bn b-m0.bvd-m3itor 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 ene. rl:*hmduz- frgy to move 10 C of charge from point A to point B. What is the.:mf *duzr-hl 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 a hr 85*yvkme-mn electron from point A, where the potential is -50 V, to point B, where the potential is -y*rv8h m5km e+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 accelerawhh z kp+2/-dn,4v wdhted through an electric potential difference of 500 V. What is the kinetic, hhh/dw-vwnd4 +2kpz 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 accelxzil2t 50d n4ferated through an electric potential difference of 500 V. Wha zdnl5xf042tit 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 differepuk4as 6izxv3 .uber0+i7edz2b(y/ q nce of 1200 V. What spex+3b2iesieyb.0 6kud vp z(uaz q4r 7/ed 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 dj -53(fwzdpw.q7 vzroo 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 diu.1 qvmbz,4x ofference of 500 V. Whazmob.xq,4u v1 t is 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. Theoq5s : +;yvn,iafse/k object is accelerated from rest througyenv+ ,isq 5:s;f/akoh a potential difference, 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 maintakih9w0my4, ct c van70ins the electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the plates0 havn, w947 cck0yitm?

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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 magnitude of 500 V/m, is directed parallell-9dcz6tn2u-) rs/r9fvn ue r to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potevrnfznt r/)cred62 -ul9u9s -ntial 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. cwm0saf h7:*f)+d vr kIf the voltage measured relative to ground at a given poa0fkfmrcd sw )*:h7v +int 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 of magnitude 3.k iebz:mq +ab 2/2/jzv0 V//2zbqke2+: z imv/jba m. 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 4ws2q 2k j6kelz .0dpzbattery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a zs2zdj.6k4kq le02wp 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, separated by 0.20 m, are connected to a 12-V battev: e79c-t4kdbim)g z sry. 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 thec)z:v bi7 dtm-s k4e9g 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- mg: tnyw*h6 ,w4 /3f4gpyybc8fsz, uyV battery. An electron released from nf ,y8*6g/wt b :hmwuyypc yz34gfs4,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, 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 tld8q rl+fso:hk2/ kjk4k:3gbhe voltage measured rkld 42go8rbq/kls kj 3:khf:+elative 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 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 e4n5okv.q+vm.kt /nxrlectric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given n5mn /oq4+k vtkvr.. xpoint 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 diffc+ny2d70al4hp pgr+f 4urk7i erence of 12 V, it will acquire a kinetic energy (in the absence of frictio+afi rp2+74rup hn 4cyg7ld0 kn) 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 potentialf1xba;n+b5ka4 d/7 o xe sloz/ at a distance 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 e ge2w,jcy+am;ja) v9i20dz nk lectrical potential for the center of th,2ye2j m)j w d+za9;k0gn ciave 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 to,odwk;7yc(2a2u zy khe potential is taken to be zero at infinity, what is the electkz ,(do2 k yua2yo7cw;ric 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 aw5ii; p 7s5)jbx1 +fdd-u /pscz(uz kx -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero atcs5u(bjkx) d17; +fwx z/up5pi szi -d 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 -2.0-nC cf; io dbrx06y)harge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work requiredy 0)i;f6bdox r 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 are placed at the corners of a rectang. -z0.7g tnc en(*ibnuwu:fmxle of sides a and b. What is the potential at the center of the rectangle if q = 2g-ub. fn(7 t0wnn *: ziexu.mc.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 i pt7svw42z (2a5fywjyi yj0/mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mjf7z(y05y jti4iwsy2v/wpa 2 C 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, mvi6g/ef2pp3u- k f;1* xkm gyfass $6.64 \times 10^{-27} \; kg$) 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 necjqeg(a+2z; s.yo em9jessary to place three charges, each of 2.0 mC, at the corners of an equilateral triangle 92azs (q+e j.eyojmg; 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 is char.p tb ga1rvro842i. d2ll+gjh ged to 100v h4ra2.i lr2g+8otjlb. gpd1 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 ha1v7zoxt t9:g:jda/x as 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 :vn55nq* udvk with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF,nuv nqvd5*k5: 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 plahcnnzb -18u m)tes 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 ov: ricji/i , vx00tgxf/8h-pa plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, wha8-/vhct, 0x/ jx0gvfipioir: t 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 acrj(f 6ktgj qm7 hi+1b;qoss a 100-V battery. After the battery fully charges the capacito;btq g761+fmj(hikqj r, 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 capacfkc3;ictf7jb8 wydd6 */eq0v itor. How much energy is stored in the d f* c3; wjbitdk0cfvq8/y67ecapacitor?

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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. Wg*atd hf l82j/f*ccl 6hat is the energy stored in the capacitl 2thf*d8cl* 6a cg/fjor?

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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 the5bxg0hz);loc 0wah sh0q4k /t plates of a capacitor when it is connected to a 12.0-V battery. How much wo/clsg0 h00bt 4h)wx hqo5;za krk 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 ;g)i u:c8wztjis 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 of9zttbgyn4:gek 0uz ln;2b5- l 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 of plates of arysp69a zemz+(f:y8d: p/w qshea $1.5 \times 10^{-4} \; m^{2}$ 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 consistc9r3bjaii:n w.9ac s+s 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 nhnr4gp03wdtm 3d 6/uconstructed 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 constructed with abha sne-*7:l+i s9b+uc3dw pplate 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*pc w-5p+i hcj(bs s4v-V battery and becomes fully charged. The battery is removed and j4pv -w(cb5+h p cs*isa 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 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 and becomes fully charged. Thev/w/n ,1- wskjvs8q qa 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, wh8s aq/w1/-w vqns, jvkat is the voltage across the capacitor's plates after the slab is inserted?

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