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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 v,tgpexbsd6rpnw +; tl/- ,:pavn: n:b ector?

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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;u79fuzndfzrw;d x as2 -c(0 d 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 frtduc,fbggihr 9t - h76.8/z8 rv8ijare insulated from their surroundings. Object A has a net charge of -frvb r i7g6 idhut8h ,.gcr8fz/98t jexcess 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 directi a-)3r.8i j5g9go)pm ahpdyvuon 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 thbi;t8 pb.nv;n-j9q ire 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+byupyt-1mvi:to6r k8 bb f01 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 ball18/ luxmsb d/f is accelerated from rest to a speed v by a 500 V potential difference. If the potentiallb 1/d/sf8 xum 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 p mg/ genv6po((oints 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 from point A to poihiz-b,b4 )kndnt B along an equipotential surface.b znd-bk 4)hi,

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mus18sfa:)a0d mgkew a s 06)rqzkqu s61ct 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 thlz9)tk6m c2k8k6 m off uxeq+,at on the electron as a result of moving through a potential difference of one mk fuxz8m)f6qktck2o el+,9 6volt 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 ofmd: vs7:1)i .gtagq vh

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corresponds x t)x)fxx+ iagg.hb71:zzef (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 chs,7 newz negz38p cd5h;m5 ;syarge is 100 V. What is the absoluteesh e7cdg 5pm5y8;zsn 3;zwn, 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 negati -g ley czv4ywb8mtsoh(8(q)/ve point charge is -100 V. What is the absolute potential hsycq -(4(ty vl8)gb8zm o/we4.0 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 theo issfgervj z*l70*srkei5)l+* )4vy exact center of a square is 3.0 V when a charge of +Q is located7)o* srs) vig*ey0jzkri4e5 *l +l sfv 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 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 3.0 V when a chdi. 5j sr bffk0.mm90carge of +Q is located at one of the squad9m0bk .0.c5m jsf rfire'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 chargeo)ky*zfn8f o kv)8masb5q (1 es 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*ojl8u1vxcb7z(9h/ lt1rl js 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 one hbd5 *co/ayri3 as twice the plate area of the other. If the smaller capacitor has capacitanco / b5ycadi3r*e 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 ojswl adt9u0n l+2- xdq bhn*-*f C. If the area of the plates is doubled and the distance between the plates is halaljub* d0-dn +-29n htwq*x slved, 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 removedw5 .a7x( .hg /2y 4sqwwtansag. 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.4(a q2tgsxnwhw a. s yw/ag57 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 between31e6xez :*/cnv,- xh -/s ooz rvz vpjrzwtj99 the plates of a given capacitor is weakened, the capacitance of that ca-eocx *h319z-z96x tjspe:wj/n vovr z/rz,vpacitor

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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 vkay-,rc(,bq-m9 ,be4 mwqvpl oltage by a battery as they are pulled apart. During this pro yrbmv,l,aqc9-q(b , 4k-wpemcess, 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 capacitor are maintained with constxua+.b e.9cyi +j7n xuy j-ebc; (z0hfant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this projx ya9b.yucn zcix;- 0e7j(b+ hfu+e.cess?

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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 mx8o uklenn6i( +z3 zimxj-(+material between the plates of a capacitoj6(iz-m8kxz3nml+e ix u+( nor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material sucs:, l62lhbq.o k ,cekwh as paper is placed between the plates of a capacitor. What happens to the caplq,l:,sb6c wo2 ehkk .acitance?

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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 platesjrmyj ip6+z/ 0 of a capacitor holding a fixed charge. What happens to the electric field between the plat/jz+i6y rmjp 0es?

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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 charged5 l*ir/ceoh s3qpy*)t. The capacitor is then disconnected, and the separation between the plates is /p3hyriq * c)l*o5 estincreased 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 au5 b4/ o0dof3mnaktl/ constant charge causes the energy stored in that cao0ul okbd4n3mt/ /fa5 pacitor 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 giv(u reho.h10;;) k (apffipbdi en capacitor causes the energy stored in that capackf0a;u efidh(p rpib;()1. h oitor 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 0twg3eiz f23s.hs 1ilmove 10 C of charge from point A to point B. What is the potential difference between pointh.e3w s s zt02igil13fs 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 f-x 8 ,gsl9rrhmrom point A, where the potential is -50 V, to point B, where the potentia -lxrhmgs8r, 9l 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 atj vha avw9i.l0v:y z.9 rest, is accelerated through an electric potential difference of 500 V. What i:z.aw. 0 a9iyvvh9ljv s the 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 accez q2z* pcsq1w3lerated through an electric potential difference of 500 V. What is the speed of tw c2 qzqzp31*she 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 gj5gmhc:yt ubln;;+(through a potential difference of 1200 V. What speed does it acqu5thu;(mnl;cjg : bgy+ire?

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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 moc -,dor 6 gkbj(*vpfw:ving $8.5 \times 10^{18} \; electrons$?

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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 acce au 9 brh:i,r/vo (bghwit(l;6lerated through a potential difference of 500 V. What is the velocity of the electron aftgb/b(;v h i,:9ai (r hr6luwoterward?

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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 c (wazf c0fx-t:harge of 20 mC. The object is accelerated from rest through a potential difference, and w( f-x:a0cfztafterward 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 electri-81jzglmt-88gk sna saqxpd 3nz:8 ,tcal potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the ngtz1gzlk8p-8 n:a md -sx88sqt3 j a,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 magnitude of 500 V/m, is directed parallel to boq+1z/(ytir os* a7+ zf.grhthe +x axis. If the potential aqgzi(o.fyrrzb/+ ta+h1 o7* st 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 i8fip ml x-h3hh1h8 4ddirected 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 direc 1f4h3xlh8- ih hpi8dmtly 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 directioyt( y+ g3 ,ziy2-lvursn of an electric field of magnitude 3.0 V/m. What is the changet-+yu2il (z, ys3gyrv 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 steq0:1kxh rt8 ;yve)a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the e )vrekex8 :tqyht0 ;1slectron 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, separated i6s8qzpmlxp 9x(b3 fqni 9)4cby 0.20 m, are connected to a 12-V battery. An electron releas(nqpb3s pliz 46)x q98fmcxi 9ed 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 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 connexwy t j-d8se+i6w 29ctcted 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 t-isd wy 6jx+cw9et28positive 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 the vocp oy00u0aj o+ltage measured relative to ground at a given poi pujo00a+cyo0nt 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 electric xl2/j -fk4pnxfield 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, what is the voltage at a pointp-4n2/xf kjl x 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 potu8frm9o rzq k60ldfu i)4ab7ik 94r+a ential difference of 12 V, it will acquire a kinetic energy (in the absence oku9 df7+ oazk6r 0ar4qriful8 i94b)mf 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 distance uv;cp m-v:k 0yof $5.0 \times 10^{-10} \; m$ 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. sjcw+ wf 6 i(bvgfl1*/ Find the electrical potential fo jfiw+ (/1 bwf*vcl6gsr 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 pote) bejzlle 4y*5ntial is taken to be zero at infinity, *5leezb4j)yl 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 pof/el egzs8zlq7 s9:t, d2hi6 xtential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at 26z sgl ez:/qd xi ,tsfeh89l7point (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,l.g6kf2u-l 3u ze2wtc 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken tof etu6clz22l ku3-g.w 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 are placed at the corners of a rectang:/ e7gayeb1: vu8inq hle of sides a and b. What is the potential at the center of the rectangle if q =q/: aiuen8:7vg1hbey 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 -v 4kxuyvl9j4 mn -9ao,a, jmuplaced in two diagonally opposite corners. Inj,44 9-xjanvmkuo -u9vya ml , the other two corners are placed charges 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 (chn46yze agd lep8o oz4x0f nevc) x84*;arge +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 place three charges, each of 2.m-qp,f h )n.f.que zu:0 mC, at the corners of an equi,.:n-he qm ) zuqpu.fflateral 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 platkgfejw6 az87 ;es of a 2.0-mF capacitor when it is charged to 10z 7e8g;jawk f60 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 h9if +.f59a4bdxih h /v pptjr5as 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 fil2jug(gcpj/ 2 iled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate are/gju2 2gc pji(a?

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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 platef bfgqk :6u thn-2n34es 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 potential :q o- zvkppx9ud,*;mndifference between the plates is 2000 V, with the top pmzpk xpu;-,oqd v:n9* late 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 batt5mjdz/ h w 1;ck,f2dbkery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from t21k/dc5 z hdj; f,mbkwhe 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 p83alvewe xg:qb-zb+ ,laced on a 15 mF capacitor. How much energy is stored in thq+a ,web b3lz gxv-:e8e 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 c mz,jy 1beg ha6:p4ou2.ss(vv:d 4hkthe energy stored in the capacitohh( z1dpe a 6vvj4: kgbmc,:ysu2s.4or?

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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 con9(5trmrha( znnected to a 12.0-V battery. How much wnaz((9hrm tr5 ork 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 is charged so that it stb))mqu0 psf2j,0lcccp 0i9 czores $2.0 \times 10^{-3} \; J$ 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 o0 gqkbrwh+j7v 03q. nof 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 consists of plates egk;nz4g(y;57kts 7h +pzj yyof 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 consistunt -bt ;9p.sps 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 constructed with fzb7g +worp3b ry)-/z :n a,yvplate 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 pb:r:wtkn3 hyp6 w 2sv;late 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 becomes f;*7d3d te rr fgp:7titully 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 5:3r7*t itd7g;rpfte d.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(n44m0dcj y tv 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 voyvjcmd4nt0( 4 ltage across the capacitor's plates after the slab is inserted?

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