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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 followin-ud1 smm un/w bwn9(*lg is 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 id9s5(tqd em,vy 3;g+(vewezas a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminulfe3-sdy ,: zd:2bkbi m objects are insulated from their surroundings. Object A has a net charge of excess i dbf ,sl e-23:z:ykbdelectrons. 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 direction 2b j43 dv9kp(*xuzg.uxe 7gj: fpv:jsfp*fb9of 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 dir*k :y ,thypg/rection 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 auzv xl(e ej-vlm1-4d d lyv,f/g1) fq0 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 is accelerated from rest to a speed v by a 500 V potential pi)6- remoy7o difference. If the potential differencm- ipryoo)e76e 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 ref42k8ei a vz;jperred 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 along an equipotential surf-eo bfs48qqg8 ac8g4qfeoq-8bs 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 must b:uugq..jpf zoj; *(d(h3ctqke

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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 equr yo6c1 cko*s :hi 2.sw-s plia.o-9tyal to that on the electron as a result of moving through a potential difference of one volt ischws*: oos sk16r.y. locpi2i9 a--ty 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 o) x7k(llrcu:/ 9vte fnf

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correr(ua4ye 3j2ui sponds 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 chargi,dv 7) u nmov;vli0/hb9zi)pat 5s2. kzrl-be is 100 V. What is the absolute potez )v lbn0ur/72,5;iiom-bt ap) 9sdlv.ikvz hntial 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 nbcc 6rri4r:vl q51 5k-zpbfq 9egative point charge is -100 V. What is the absolute potential f q41lvik- rcr:q pr559 b6cbz4.0 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 a square is 3.0 V wh as1zi:bfa0mhw6/qu9 i ,ke/ten a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when each of the other cornerkaqf1zh6 9bai/0s /:iet w,mus 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 t 7/fu uq3qv et9lm*zz9he center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. Wha9 umu zfz9qqelt73v/ *t 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 twye i u ))4sye;yxafgd.u9 +6keo 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,ta (nd7h6jq w 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 identical in every r gkd .:bic02mnespect except that one has twice the plate area of the other. If the smalnb:i2 dgk.c m0ler capacitor 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 v;6nt(sn/ mgrtl r3w0C. If the area of the plates is doubled and the di;n0 6mt lr/3r(sgtn vwstance 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 then is removed. The plae 6uo/lo i ixa+hhbg14vpwg7 7)czg0-tes are immediately pulled apart. (With the battery disconnected, the amount of charge on thgp -ex0 1hwzu)c/vo7i 7g +bi4gh6laoe 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 between the plates of a given capildz f/hy 5( ,n(75firoifgh8acitor is weakened, the capacitance of that capacitf(o(hf5irlz nfyii/ dg 8h7 ,5or

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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-y xfddvg5l a5a6vf+l3 clb cw59a:r;,plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of ch5l a5 6b3xv+,5awdacrlg dyl9c;f f: varge 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 volta.*:dns qf.vuj n:klxe o n ,(nd163leage by a battery as they are pulled apart. What happens to the strengts*q x 16.(lkfadu3e ve,nj:n n.n: dloh 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 mat-t qq*, h*vbkfi60kb2i w.8w kjz-x uoerial between the plates of a capacitow-qt fkwj kuz -6i*x q2bi0v,*k8h.bor.
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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 m3 pnv28lmoi .capacitor. What happens toipm.28 mvoln 3 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 capacits /dgvcd e)pxcake,t88z7 m;2or holp2cv gks7 mea) 8 dxde;z8ct,/ding a fixed 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 conn1 nb;y5fr/lep1qubbbwa/f ( 9ected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates i n f1y/ ebw1p bf/a(;rqubb9l5s 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 cib 4b-ws7y,llx (.iwf jm*m *a capacitor holding a constant charge causes the energy stored in that i.lcmj y -7*w(m*wl f 4bs,xibcapacitor 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 capacito3x94 e kwp4xjfr causes the energy stored in that capacitp9 4fj 4x3wxkeor 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 point w9:bvnntj f, +3ang4 vxr) ld5A to point B. What is the potential difference between points A:b5a+l4wf)9vngd j xnrt 3,vn 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-. i0-xj jglh-d-dcyhx x1hch-m5cv 7 electron from point A, where the potential is -50 V, to poinyxcvi- h h--gdc7 5lj xh1hd .xm-c0j-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, is accelerated through an el .l8vaws7aux: (qeje-84w lybectric potential difference of 500 V. What is the kinetic energy of the xjey7b4us(l :lw 8aw-.v qa8e 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 potentialdsv/p / d0n c+ftv*6.yc(a tiz difference of 500 V.nvsd/6if+ydt0c (t/pz.*v c a 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 potential6:3)ia9k *pnoj yqa yy difference of 1200 V. What speed does it acqu6a3n i j )ypk9y:o*aqyire?

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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 i +uoso fh.k7+u l1wpw1lg39zu+/m cpbn 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 difference of 50xjli+ wc kt*m6vh9kp:fz+k.9 0 V. What is the velocity of the t*jh kvi9m+k l kz+.xcp f9w:6electron 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 dve42lfx *e z9 z(h/lp k3s0zca charge of 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What ep*zlkz vxeh0(l34z2 cd fs 9/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 between two par)kbu(7 xtfd7aggu*h. allel metal pl) augugkh. 7txdfb7* (ates separated by 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 hmt54q 3hg.wm, is directed parallel to the +x axishwtqm m4 5.h3g. If the potential 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/Ct9b ti)bg1brm2q5x(a-q9 oa p 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 point 9br9i5t()g1mt aaxqpqo -2b b?

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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 tro52a k9n0of vhe direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy 0fo k9o arn25vof 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 7bqw)osy(7dab ) 8evuconnected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arriv aq))e7 (db 8yuwbo7vses 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 connected to a 12-V batter z p7m2y7s)m0 7clcryhtjr66uq t-3hv y. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distancc0shtqp2l cvt 73uym6 rr j zhm)y776-e 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, ar- qpa,f9fka .1uy3mdye 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 at a distpak df-q9y1.fm3u, ayance 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 to0phf-r0teh(cjn( yr2/jgivet.l l7 2ward the east. If the voltage measured relative to ground at a given point in the field f 7re0 nh/l tt l2 hjyicjg(r2v(p-e0.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 towa z5(y2/5 oaegtes5oty q-( qylx6zid ;rd the east. If the voltage measured relative to gr25(oi z yl/yoeqtz(d5et-qy6; g 5xasound at a given 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 potential dinrohnh*v8r*rc, kx /aq02f4jfference of 12 V, it will acquire a kinetic energy * kxv/r*4honc,j0n2qr hf 8ar(in the absence of 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 aeweau /.4x1wwj g-/fmd /2ottt 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 m6 ee;,bnjfnhi a0c/ z( yle49geter stick. Find the electrical potential for the center of the mete/; ln06e,eb n4h(jac9y fgz eir 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) a+qxcm (v8 mg-- fi(zmfnd a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero a+i8 zf-(g xmmvfmc(q -t infinity, 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, 0noz,il0f:bq w :g:oux,ig6n0.nz zs;ijr * :l). If the potential is taken to be zero at inr: z gnb n0 :nl0o.zifosuq*i6,x ;z j:g:wl,ifinity, 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 charge is a8 xmfabf kc,:9t (3.0 m, 0). If the potential is taken to 9fkb, c:xa8fmbe 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 chargebb54xf5 yhsmcgo3b1 d8 uxs 4: +q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectanglxm4sb1y8x4b:5o gb53fs u hcd e 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 onqbg)9up3zx 0t huuvxh 0a-t,; a side. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolutequ;zx0aphgu)tu -3 v,09btxh 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 +2ep+s:)fg(o r 4p6l0ic vsraez 0, 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 ofsqri-1he;w8hr, *k(o fswt 2-bct2jt 2.0 mC, at the corners of an equilateral triangle of s,-( 2qoe2bct hs-rwjtrik;8*st hfw1 ide 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 w-z4m s nv0hp q0c8ys0u/lpw42.0-mF capacitor when it is charged to 100 Vu-4l n p00ypc z hmw408/wvqss?

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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 platesy* bba b7a/q3k/5qq od 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 with air, and the plates are separated by ti/u0z pj/hzhkp94 ,)s9luov0.04zs 0,pkhvz) 9utoiu/ jlp9 h/50 mm. If the capacitance 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 capacit (b qsq;+ s5ntm1bfxy4or 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 pla 7l;n:ye:b kjds :jd8jte separation of 5.0 cm. If the potential difference between the plates is 2000 V, with tny e;l bd:d:7kj jj8s:he 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 100-V 7t1kro awl,m u w nm17jel93/xbattery. 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 battery, which remained connected during the proca,l91xoum7 k w37 le wnrm/jt1ess?

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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/ exth mtdmm a6;+;(zl capacitor. How much energy is stored in the capacitomthx+alm(z ;t m;d6 /er?

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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 acrosujzl va7 :/d 8u,otut*s a 15 mF capacitor. What is the energy stored in the capac:lu/a7t,8 d*zt vu juoitor?

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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 wcxrk5*-)x o utk0kk5capacitor when it is connected to a 12.0-V battery. How much work was done in charrk5c)-ku to 5x0kw xk*ging 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 -x7fct*lc.*)pdq u pais 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 capa.n( qbh; wfe+h-gi b1bsue7/s citor 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 o8ga8- ww4t mzvme:+d vf 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 platet3zn,j 78y mojw3igsgf* hu31 s 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 capajdzirbi- /m5dsi )xg-2 *9ojh citor 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 capacitor is constructed witos ,)wc kd*op2h 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 tozcd v6 bkxs902 a 50-V battery 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 5.0xb9s k02c6z dv, 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 becow : dnf k50q0d vimk +yxe+n9v*xr1(ppmes 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 i5v+0 dn1p e:d fm xqr+0pi(wyx *k9nkvs the voltage across the capacitor's plates after the slab is inserted?

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