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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 ac)t 4pd 5bdtzh/ d*4iy 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 o 5u.3y ohd-lwis 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 a to0:ajalnu+7re insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which ol+ j7 :0uaoantbject 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 directicc 4:jolx*bv;ak +w s.on 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 fieldn-my,s.+yfdp

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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. T(81okgjg*v8m s obvr2hey

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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 acceler 6d6s8 hzn(v5umxls b;ated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new spe zslm6v6 nbs5(h8;xdued 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 refxp)f irw2 .qn9q5e4z qerred 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 uf2:k li*o9ojB along an equipotential surfac* ijfko 92luo:e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mujrmdb8a+cf* k83kh wq5h 7p 0ost 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 parwsc)ox 5)su ::pdes8 fticle carrying a charge equal to that on the electron as a result of moving through a potentixoef5d )u:s: ss)8cw pal 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 ai3 a t6vxf2z*e unit 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 correspoc8 p((edq+so pu+yb6lnds 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 atvpop i8;ncd)0 a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0n p0c 8)vp;iod 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 mcrfnpk3+:q9 2tp yy/ l from a negative point charge is -100 V. What is the absolute potential 4.0 p + 2nyrt:l3c/ypfkq9m 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 ex00h8vnv ,kxv;bkqa+ jact center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is b ; n+v8v0,kvhkqxa0 jthe 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 olyjmc*mt 1p /.h0pp9 a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center *pmc/op 0mjltpy.91 h 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 thajck8sr)* w;nrlbpd :2 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 voltn:*-u0 lcoodhq t3 7v3h zq3cd is 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 capacy6d-1*m gqzo+wxv;tjz af ,.gitors are identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitancet .zw gdym-,*o x+g6vq;azjf1

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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 the area of the platan r*sged(/:p :m9 vvzes is doubled and the distance between ad9v/gv:np(*sr: emz 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 xjg-pl cchaj2r4 3xtg62)k- jis removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains consthcxjxjk a6 2jg4prt)2lc-3g-ant.) 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 thew+c)b r*qk43vp 3gvb j plates of a given capacitor is weakened, the capacitance of that capacq4*pbgwv3k3c+rb v )j itor

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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 volta8fzf3k, f+x rlge by a battery as they are pulled apart. During this process, th, 3xfkfr 8lzf+e 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 parallelx: aat w(x2yj p0al4e2-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this processaxp2xaw el4a0 j2yt (:?

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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 pls6 u3t39 1 vbuv qgw-ncyak32kates of a capvv s9ngb6u2y c-k qu3tw3k13aacitor.
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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 between the plavp ).r*6sf r,0ginunk9lidd 3 tes of a capacitor. What happens to the capan,kri) id3f r9l d.s n60*vugpcitance?

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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 p8n6n g xjhgpkn4pw.xq-:o : /clates of a capacitor holding a f: . -njg:wqnn6xxg4kpcp o 8h/ixed 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 a7))xhfb : by +csp9bvk battery and becomes fully charged. The capacitor is then disconnected, and the separation between the f)sxcb9h y7vkb pb:+)plates is increased 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 c:l s(h cxq 5sb:c;/zvhonstant charge causes the energy stored in ths zsh;c:/5qclv (x: hbat 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 capacitor causes the gz 8gqet5b+y v/ dh0sj:cbj4* energy stored in that capa ej:gbc84+j b05*vd/tg qs zyhcitor 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 tmp:0ah r qp:lb);u gn itt;3: d:s7wyyo move 10 C of charge from point A to point B. What is the potential difference between poindp w;0n3:mutslt:yha:7b igpq )r; :yts 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 potential iv4f 5feq;ksf e,;txbl8: k0svs -50 V, to poftk;8sq bs0x,: 4fe5fvel;vk int 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 1wjlku 1yf*de7k*w.tj(h 2/o bvp+yz an electric potential difference of 500 V.oky*kj1lv ujwz ( +f.w2/ th*ep7 db1y What is 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 accelerated through an electric potential divndb: wqoe/b3y -0j u7fference of 500 V. What isd0 - qv7j3b:ne oy/buw 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 -/*eeprj( qcc V. What sec(pjqcr *-/epeed 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 in movinl 0c z.akui3-xg $8.5 \times 10^{18} \; electrons$?

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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 diff8t td9sq: m)zperence of 500 V. What is the:tztd p )q89ms 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 dj/bou4pif /50xr3whf hr*;v is accelerated from rest through a potentihru4;*j3fbdr0iv h/ pf/x 5 owal 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 maintains the electrical potential difference betj a,7vn sn 4c9rn+ui;i.6 pqnlween two parallel metal plates separated by 1.0 mm. v,l4sj 9i+6ni; nnq.ap rc 7unWhat 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 magnitude of 500 V/m, is d*w: vo mr0(g6cbkpm7 wirected parallel to the +x axis. If the pote mw* 7: v(6gp0bomwrckntial 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/C directa/j g4zfyi* w+ed toward the east. If the voltage measured relative to ground at a given point is 80 ywz4+*/fag jiV, 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 alonsq )3d0xzo pnu)g8q loj4j2qylt)uz.ao(s5+g the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic ener.z pq(2j4gd x35jyo)tz+ ) lo0ssuq)l n8uoqagy 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 19ghv8iv0kf6 i4e0 fft2-V battery. An electron f fe9itk0gvfi6 v40h8 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 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(96pnzmwpg6 y6)gapur fh2e-ny 71ab, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives atg ng7()m-ebapayr1z hp9p6 2 6unfyw6 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 bat 9v9z)lfi l;litery. An electron rfzii 9)l9 ;lvleleased 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, 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 )uetl f9( olmh2., nygg9b*eyvc i 5.hfield of 50 N/C directed toward the east. If the voltage measured relative toy .nvh*lt eg2gy ,o( bul)mc.hie59 f9 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 electric field of 50 N2 yznhy9x5/-xk9zx zc /C directed toward the east. If the voltage measured relative to ground at a given kh2x9-5 xyzczzx/9yn 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 potentia54 y),n5+saobtxb tdy 3ala 2 98mdgbul difference of 12 V, it will acquire a kinetic energy (in the absence of fric82,d st5b nda3 xg+ a4yu)byob5al t9mtion) 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 of l;67/yk5rs aqcvnrr ;$5.0 \times 10^{-10} \; m$ 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 ,ui q gi+ xduseouh1 k7.,lz:lu8+ac8 ends of a meter stick. Find the electrical potential for the center of the mete87qihuxde+usz,1 lu kai8,c .ul og:+ r 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 6aoqer 611 xdfpotential is taken to be zero at infinity, what is the electric potential6ox 1edfr 6qa1 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 ist:y 45bfw(:tp9m4p xtmlyd; d at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC chartptwmty (::xd44df l;95ybm p ge 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 -2bn 0 *ipnhe1r5 e1fmw).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 cha50eb) prmwh*ni1 1f enrge 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 rectansiq/ 6b)bdge)gle of sides i/6 qseg )dbb)a and b. What 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 placeduq ,i46vo9shu 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 potential in the square's69uihv o u,qs4 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 (charge7i31c 9tvpdto +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 oa kgrnsuhm1.8 w+9; cu5s iu;gf 2.0 mC, at the corners of an equilateral triangle of side 2.0 cm ;u8.kimgsan u +uc1 wg;r9h5s?

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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 thewe1 j( 8.:ooxy i)jguvhlt 6x8 plates of a 2.0-mF capacitor when it is charged to 100 V? 88: xjly e1hwu vo(ot.)6jgxi

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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 vpg,y:(m+k weof 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 p+dnt;11 x/bn +dfez hby 0.050 mm. If the cbfd+dp+;nh n e1x1z/ tapacitance 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 capacitor has platep ka+5u1 jsiu)s 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 r mvs+ok98/big, a5xfx6;tmocm. If the potential difference between the plates is 2000 V, with the top plate at the6 ok89;,faxv+xis/gtm5m bor 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 battery. After thdb.:v4: r1ak 96zqvsbbjq+zh e battery fully charges the capacitor, the capacitor is immersed in trab.49zk av:+s :q vzhr6bdq1jbnsformer 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 agg16 d qpk5.yplaced on a 15 mF capacitor. How much energy is stored in the capacitor y1.6gp5dgkaq?

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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 c b4um.87edrd:q0ccy is the energy stored in the capaciue.7yd8mc:cd br0 cq4tor?

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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 i(f5atw r1iqg.t is connected to a 12.0-V battery. How much work wq5(.f tria1g 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 ceh:v j*zc,jiqd by8z l8-6/gc*m u wr(xcuc70harged 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 capacitwk6oto9 8lnk .ovm .j)or 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 consists of p4* nzagsab l)fon;a;*lates 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 plat6b/fu93c ) tkrtr9sa qes 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 q0.tmg.i nns: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 const 9ad c20u/lqhmructed 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 batw jm fh59g q:ppc2k4nq pwa9)+tery and becomes fully charged. The battery is removed and a slackqp9pww5:nqh 2+ )fp9j4am g b 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 ba5drf op0 *(zjiy42n aettery 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 vor azjn2e y4iop0d*5 (fltage across the capacitor's plates after the slab is inserted?

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