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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 iwrew:js fr, ln e75.7odloy:* s 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 is ah+sd(we4r q *f

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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 insuu q,c9hw02psmw4kbs; lated from their surroundings. Object A has a net charge of excess electrons. Object B is s h409cmb;,qs2kwupwgrounded. 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 inz5 pqs;pz( gb2lk5:ob the direction 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 i vhm/v l9ocm 43fn:a;jn a direction 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 i3pihpgufs:u4/ i0utv m,z )0conducting 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 acce:tb7mi dwux4 yekd( - r4xvl k3) ax.1q4zz0vplerated 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 s3-wmik(dy ex tuxvkqb. )47x4l1zpr0 dza4v:peed 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 potentialyp;v /ka )muv9c30 sbv 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 ise age k(;o4sh1 moved from point A to point B along an equipotential surface;gk1eeh4 os(a.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface m7,bny8 ao9s37rnw e lrsa* rd.ust 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 parts i1i702 ahbnjua) -3sxk tc)bicle carrying a charge equal to that on the electron as a result of moving through a potential difference of one volt is referred to as01tic 2h )b7s-nbas jku)ai3 x

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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 u2a3btqoa hqwozp zgy* .o44, :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 corresponds -sxw h7)1ag3t)f6ste f5cet cto

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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 fr2y f3 yryyl l7;4u7x2olwqyoflc m-72om a positive point charge is 100 V. What is the absolute potential 4.0 m away from the sw7x4lcy-;u 32l2fmo7 r f o7y2ll yyyqame 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 dis4zh63d 1 weukjtance of 2.0 m from a negative point charge is -100 V.j1zwkhed4 u36 What is the absolute potential 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 aeop//izxt(lp5ps4 b1 ay 3 jb* square is 3.0 V when a charge of +Q is located at one of the squs/jt bip *ay5(po/bl p413xezare'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 t4+e5+ e 3s:mhwb sbd3 ebgcy.the center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. Whae 3.+b5bc hemd4+wgbss y3 :tet 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 alwayst(qd g9by0t:m9s2 gcqi3v;qkc bt).a consist 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 voltyjxoyh d+1(4d 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 capacitors are ,m:tzl;ived . l 1+d1i1oka(y u8d tieidentical in every respect except that one has twice the plate area of the other. If the smaller capacitorli1(d 1 ke8o a+,u; .izmlvt detidy1: 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 capacitance of C. If the area of thar,dd7 c )mqec+l0i.ue(un8k e plates is doubled and the distaeq,a. l)dui+n0kdm8 u ce 7r(cnce 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 thenyttm +ohk)*s--pk7))ngo ahjy q( 8l v is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens toh( nah)lmjk*vt t o-7 8)sykg-yoq+p) 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 s9u,xk)z fmv7w lqb34the plates of a given capacitor is weakened, the capacitance of that capacitm)k74w,9sfxzb3q luvor

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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 constann-8t- sx+oxs4r a dh.ft voltage by a battery as they are pulled aparx+f4.-hdtro x -8nsast. 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 capacitor are maintained with constant voltage bycjt+adtxav7gpv )2jn t .ls; ( :jy//v a bj(td/vtxl+v.pa7sy t nc;j a2 gj)v/: attery as they are pulled apart. What happens to 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 adding a dielectric material betweas h)n:379 jppepkm t+en the plates of a capacitom+n a: )9p7phekpj s3tr.
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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 plates of a capacito r)8n99g*xfi vyhum(or.9n)fi u* y8(g9horvmx What 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 gaiqosdpyo m998:b;ql8g h ( w(5 uj3hplaced between the plates of a capacitor holding a fixed charge. What happens to the electric field between thjp og 3w58u(ghiq:9qs8ymhb a (9 odl;e 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 connetk 7 f*vyb f l0k33k9u3fwt9vezmb0c)q-ek*f cted to a battery and becomes fully charged. The capacitor)0q* kvbk-cf mk y 90eu3ewlf tbfk33vz ft9*7 is then disconnected, and the separation between the 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 holdim2sd:d up1s5h ag-k.mng a constant charge causes the energy stored in that c1um.p2 sk-smdda h5g:apacitor 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 giv4 o 2ercxc dw(+c+c+osen capacitor causes the energy stored in that capacitoo d+x s+cc+42c(wcr oer 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 charge from po7:aulbi, f hrf8f3*+flpv2keint A to point B. What is the pot2u7kr fv a+if,l b8fleh3fp*:ential 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 p/knz5pb. z 5njoint A, where the potential is -50 V, to poinjknnzp5b z/5.t 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, du,fp 67fo0z lnro4gnm+ 4ymn6 ng o:3is accelerated through an electric potential difference of 500 V. What ofl6 ogf6o nm3m0rz py+44du,n nng7: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 b6 fdb+pncjiic fc efe:(0)( 3.np2joat rest, is accelerated through an electric potential difference of 500 V. What 6 ifpfpj(ji bo+.(c:dn 03eb e2fcn)c 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 protx0;jp9u hg2 eoon falls through a potential difference of 1200 V. What speed doesoghx2pu j0e; 9 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 movyt2kg:(5rgh ming $8.5 \times 10^{18} \; electrons$?

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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 x s*enr h61mvdq s..;hut-w -pdifference of 500 V. Wh msdwqx.;etn hv-shur1 p .*-6at 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. The ob3fri ;haj.r9.z9 xr gdject is accelerated from rest through a9j9.hxzfr.g; ard3i r 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 maintains the electrical pote4mwqb;5 +cozz ntial difference between two parallel metal plates separated by 5c4mb;q owz z+1.0 mm. What 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 directed parallel t 7ey6xv5f d+gzwl8qk; o the +x axis. If the potential at x =l vxzqf +7eky;gw685d 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 directed toward the east. If- cki -.4zattli3ji i6tms1* ix i13wj the voltage measured relative to ground at a given point is 80 3i .iimizl1ia4i31 jtjct6skx-t* - w 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 5+mj xj8ut2ky m along the direction of an electric field of magnitude 3.0 Vt x 2j+mk5y8ju/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 conne :mj 64 gcoj5y atatf68,bm:spcted to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives ta4tjy5ba6: gc,m of p6smj:8at 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, are connected to a 12-V battery.3iuy1hun6m;rx g pbxad;p(u05 y rz9f. 2 kv3o An electron released from rest at a location 0.10 m from the negative plate. When the electhov bup5fu2n;.rk9 i0 ;3dy um3xapgy6rx z(1ron 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 connected to a yljw+c2wp/qfcv a0 b8af w7 8112-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron 1f yw/2aaf8+cp qlwcj 0wb7v8arrives 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 elx*k b4x 0g;h d 9 u2zop.rrc6jh,fbyd6ectric field of 50 N/C directed toward the east. If the voltage zu9,d* ryrf6;x.ohxd2 0kj4ghpb6 bcmeasured 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 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 N/C directed toward th(6f bxwk( f yy2j*jw vw0o/6dwe east. If the voltage measured relative to ground at a given point in th0wj( fbxw*6 ( kwd/v w6jyo2fye 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 difference of 12 V, it wild78 bboxi(mdnvnh5 *2l acquire a kinetic energy (in the absence of friction) *on7bd8hvb5i2dm( nx 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 distanceffx0 ; d;5f vpqoghkgm*:n *fq64 (hdn 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 yl asz2s)mdn(2z k,w* stick. Find the electrical potential for the centerz ss(m)kdawz2l2* , ny 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 a4yk,d; 6gq hrc9rfha :t (3.0 m, 0). If the potential is taken to be zero at infinity, wd 4hr9y6,:aqg; cfrhkhat 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 -2.0ssod65q0e: y.s nsi7o-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is .do:esin7s 6sq0yo5s 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 charge is a)/7yhzbckq r42rcoae h c7q 2+t (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 charger/ hb)2ahk7ocz ec r+qq4c2y7 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 thez5n4idgn, h4w corners of a rectangle of sides 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 5w4d4,znnhgi 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 placed in two diagonally o ywzmgql:,x-o utkw(c5/9x1 tpposite corners. In the other51o uww/t:(g- x xlqzty,9kc m 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 (charge +2e, mahdgj10kb sp2-m59 mz 87fbn dhss $6.64 \times 10^{-27} \; kg$) 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 2.0 mC, at 5g mihpi5zn*7xrir1 , the corners of an equilateral triangle of side 2.0 cm*5gh 51zr7xinp irmi,?

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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 chze 7vr9;(.p/vmwyvk.12mjvpfmq( siarged to 10(frq1vm. ip wm/ v9v; k.y(z7vmsjp e20 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 has plate-dh)8j l m asylsn-; 9dj,4bzos 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 isj.jo:s r0e ,yc/mkuibr0c*y 6 filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate aream:k. jy6e/i 0jr, ccsru0yob *?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capac8qc:wz2kw: ycitor has 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 plate separation of 5.0 8+kh*2krooktyis.t 0cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field between the plates?+kk ostr8y2 oki th.*0

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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 kk 47l p or6dbu15;;tdjkxsk; across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed d6ko ; xt;bj1;4k7u rp dkskl5in 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 capacitor. How much energy is stored x 2hh t/7el )85zaa7r ,twsekmin the capacit t emea7htzs wak5x278/)lh, ror?

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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. Wpc,pkeh8w,,tr+ si i.xi3l9s hat is the energy stored in the capack xw8+pi.i,sipclh t9r,e,s3 itor?

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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 f0:. piyqt ,csb(-ar nhlows onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capaci:rs0q- n t c(ha,bp.yitor?

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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 s:tq) (*js jd*y if /wit:lx;zutores $2.0 \times 10^{-3} \; J$ 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 cap1i etmaz mh ufmm7-;s1j1*z2 qacitor 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 plates omcc (xya*2qh(wd1 e q*f 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 capacibddfq.hf3 m w8ub+1.rtor 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 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 n,agxa tvivitk76(( 7 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 wi1jwo ;43 nrhx4lag*nhth 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 * cujr8n6-skea 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely filns 86cju *rke-ls 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 cz.+ ,ab1 03ztryjghc fharged. The battery is removed and a slab of dielectric that completely fills the hza0bz, y1+ 3fgrjc.tspace 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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