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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 vecr(eku-o2 r8s yl 8*qp7s3heq6u/f jc wtor?

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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 i)+3o rga,dxsg s 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 object;1rei-: bnyhl s are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is ghy-i;lren:b 1 rounded. 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 + toigp,)1 g1l0s h6kla,ihmt 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 in a direction opposite to the electric fs4f: dhgt,hmc+c,5(af )v bhdield

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Several electrons are il/3n7nsqth/ w)e6g fplaced 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 isj*b ez :6f1er;p1we/nmxrtc) accelerated from rest to a speed v by a 500 V potential difference. e6ecw;/ ne fxj)1*mtb:pzr1 rIf the potential 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 potentia1 p03ag*aebo n+nn ,iel 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 mk 7k o,ol 9uzru(v .zf5r*8j8pnqkru7oved from point A to point B along an equipotential surfaceu9788qjr k*zrzl5f(oku prk v7n,uo . .

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface muhx0kmaz3e 6eos*.z lvwwjt+3 , n(n/cst 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 b)q aec.uem3 nql(0 -4xof l:oto that on the electron as a result of moving through a potential difference of one volt is referred to ebf-le3.q:a4c u0 )(x qnl omoas

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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 o.ivmj q. 6rrb-q 3trc6:ve .oqf

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt cobemp;2u/ pm+orresponds 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 y4na 6 2hiwt.spoint charge is 100 V. What is the absolute potential 4.0 m away from the same point charge?h 4t2 i6ny.was

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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 neg) y)pw/c v8kw7x iu2cgative point charge is -100 V. What is the absolute potential 4.0 m away from tw)v g kypcw/u7x82ic)he 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 is 3.0 V when /lhrf t),2iaz a charge of +Q is located at one of the square'2,rtf za/) ihls 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 isqjwl+ /f)*ro pjqvxo.j)x6 / w 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolutev )ol.fp6)rqwxwjj+ *q/oj/x 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 tol/+/br5bpcx, y 5zkvb7ser:gbu p37 wo 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 aya hx348eb ho5bj-beg:u7x oe/x4q u8

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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 o3*j x (psp7gruldn/*p8qbz / that one has twice the plate area of the other. If the smaller capacgs7bqppz/8jp o 3*(/n*u dxrlitor 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 capa(t- vcyel3uc 6wu2xn,citance of C. If the area of the plates is doubled and the distance between the plates is halved, what isu(l6cn-t c e,3xu2yv w 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. Tho4w8:r g* khqn:*cd ryoe l,3we plates are immediately pulled apart. (With the battery disconnected, the ao: *qg ,h w kc:d4orwle*ynr83mount 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 iow: gfq:0pyb08.pcox9cmn*t5rl)m between the plates of a given capacitor is weakened, the capacitancrit:0 ynmpo 8lx*wmq)0 c fpo9:g.b5 ce 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 c /a5ba*fq: j(seh:* mxajaddk0 pu*+hapacitor are maintained with constant voltage by a battery as they are pulled apart. :a *:m f0ajueqdxk/ap *+d(*h5hasj b 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 . de 1+/lznusai27y 77nfmz nymaintained with constant voltage by a battery as they are pullzadlysme.1n/2 n7 z7fniu+ y7ed 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 between th ur rohh/;p9)je plates of a capacihjr;o9 )/urhptor.
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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 p4r am79rz)he5 yb mkk3aper is placed between the plates of a capacitor. What happe 4 m3azmyk)b57h9k errns 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 suc mhn-20uxfissvy ub )qmsd)/gh896 )2bpw:och as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field bet2q)9h b)yv pxsu/8ncb:m d)i0mhows2 g 6-fsuween 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 capa r)c ufyn uyd.1ua255tcitor is connected to a battery and becomes fully charged. 1 5u tyud.2)fyau crn5 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 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 ,f(wmudsef6 (r.dt a6 of a capacitor holding a constant charge causes the energy stored.wsd (,tuf 6m(da6fer 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 c/tqgsmx-u/(, nt hmb9apacitor causes the energy stored in that capacitor btq mg9nu- ,ht/x/s( mto

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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 ixha9q /8. / xeqv:knpC of charge from point A to point B. What is the potentia/qpx/kv hqx9 n8ai.e:l 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 potentialvtrfy85q;mf t) g e 6ff8al3b( is -50 V,(gt6l58af3yrfq)8t f fe;vm b to point 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 an electric potential d k y 5qn q3fw6i86dlj-u+a-glsiffersd qq6-8 a6ulfki+-3wy5gnj l ence of 500 V. 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 eleck r1ux fl )19)ldz,2no*zwygytric potential difference of 500 fodu,zy l x9)zr 12yl gw1*n)kV. 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 o.wihv/7q pl )df 1200 V. What speed does it acquire?d7vwq/plh) . i

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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 l9v,p5jnfx/ iy,;, ajbei.phmoving $8.5 \times 10^{18} \; electrons$?

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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 differencx. olhe 1v6wd*e of 500 V. What is theo16wv* h dxl.e 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 cha rlkq2)keo: +r* 4iwbdrge of 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving b2:)ork*q k+iwd4lre 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 maintainscg w*k13 bg2e wfl217n7ahf-b mi2t ut the electrical potential difference between two parallel metal plates separated by 1.0 e 2f2m n-7hg 1ka2*t7iw wl1g3ubctbfmm. 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,55;wvr 6zpgq g to:b4n with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potentialbv4trw; o5gnp qz:6 g5 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 qr(fgqyd vp8, d*0t,s4/mpo p 50 N/C directed 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 directly west of that p,4 g0 ypdqqo/,mr(tppfs*8dvoint?

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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 direnni0pe0*z.h7vmjo*d g ::eca ction of an electric field of magnitude 3.0 V/m. What is the change in ki0e npda:n*.v0z ejo7: mci* hgnetic 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;8jsnrt;so;5 x gt u+ -vvl7nh m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negati tljg-+ sstv8o;xu7rh vn;5; nve 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, are conf61)-slk nlne(pk-ao j/)buv nected to a 12-V battery. An electron released from rest at a location 0.10 m from thp)be(a jkfu-/ k 6 nvs)ol-n1le 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 connected nx56t.wr9 k4 fdkop/z to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plaof 4k /z95wt6 k.dpnxrte. 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 uez69i/qs- anyhg )gy5ame)/ toward the east. If the voltage measured relative to gr/uaina5m)e -h gy9/ y)q6ezsgound 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 ele sz:.58wie fgsctric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given s.5zwise8g:fpoint 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 throu7 nfhs;5-d4g ,wsgqvtgh a potential difference of 12 V, it will acquire a kinetic energy (in the absence of fd ,shv fg;-w7qt5g4ns riction) 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 diw8z /twh*wl 1hstance 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. 1z d3fs51(7aqcmz40 z y tagscFind the electrical potential for the center of the meter stick.1gc4s3m1fszd(taq0c az7 5 yz

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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.q/ri4yu to5k 60-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinitu4qyrt5ki/ o6y, 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 -hht: opd mg; (hiaf9:7sfqw;/ 2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potentisqohh(ghfampd9fw7:;/ i; t :al 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 at (3.0 m, 0(s5 abh+k .sijsqj9/x). If the potential is asjx5i+ sbkqjs9 h(./taken to 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 rectangle ofxkly3h , j3bm4 sides a and b. What is the potential at the cente b 33lm4,xkjhyr 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 *naray9nz jz+7(by p /side. Charges of +4.0 mC are placed in two diagonally opposite corners. Inp + (z zy7n9*banra/jy 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 (chargeb3xp. y llyxig7g 71wmob/*,b +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 pt9u zwpq) wmootz.+-+lace three charges, each of 2.0 mC, at the corners of an equilateral triangle of siztu tm)woz - .9qo+p+wde 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 cf)n.3c xt khf he:tmf c.7i 7jdfl7p24harged to 100 V?7h flf7c:mht 7)pf3cd t4..i2n ejfxk

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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 1yn.vu *i n 8y00rjnmlof 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 filljzluo:+nw.r5u ph54 ped with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate 5u.p+pu:4n5zh wl rj oarea?

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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 pla7t v57/mj4 hplfu)yj ftes 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 - *n+z ycs;cnf5.0 cm. If the potential differences;zyn+c *c nf- between the 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 us 8r0ohhu- ,5 x9bshc100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the ba90h,8sr ucohuxh- 5sbttery, 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 onnu- bzvol k-m +u3nhxe-s2 g7/ a 15 mF capacitor. How much energy is stored in uz7 n vkoux/+-2mn3h es-gl-bthe 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 energy stored 92iy6f:);tmkr / a hojrtb jt+in the capacitomft:ti ao9tbyrhr /;6+k2 )jjr?

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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 co9 o+t uvsqbh0ey:*i)lnnected to a 12.0-V battery. How much work was done ql etvyhi: u)b9s0*o+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 tha;xbmu5dvp o 3cq ry;,93 -mczfaxg0re.0 /xlz t 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 o8 qio fmg3/6pyf 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 of are4(6 dfj 1dqseha $1.5 \times 10^{-4} \; m^{2}$ 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 plates of ;v wd r)dni2z5tv2n-e 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 capacj4def1 o+yrr 7itor 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 capacitoi( gwgt2q.kp q3i2)2dzrxo2 sr is constructed 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 battery and becomes fully :vd 870 pw.xc.c uehxjcharged. 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 capacitance of the capacitor after the slab is insj8dv :7wh.cxe0ucpx .erted?

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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 charg5 7.cbb gtef2sed. 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 of27gtf5sbb ec. 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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