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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 notf ;und;.) m1kn l,.kunqp,wbl 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 6vv 6) j2ynbwwwtq i49fqh.;uis 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 are insulated from their surj; eevd82wn ,+ nx9qo*spv+qdroundings. Object A has a net charge of excev*s,x v oqn+9 je;q8pde+wdn 2ss 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 directiz 39r+uym l(hrgyb 4r0j,v/ oqon 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 f yn -n/e5v5dhdirection 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 conducting sp::rey. -eylh there. 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 accelerat hjlau9t-s-;u ed from rest to a speed v by a 500 V potential difference. If the potena9-l ut-us jh;tial 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 samewim ;.-x*1y/ps /0 *xr btjkbiurmo e) 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 point B along an equipotential suo *aqml;+me;v 72f:avlt)h zhrface.27fvmh ;vqame loh *+l;z)at:

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface muswm,;sm6 ,4t x1nw9u lqoh wr5ht 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 w ( bu sz /fgv9x*wi(wv+yk*j2particle carrying a charge equal to that on the electron as 9g*2w wusf(y( *z/+i wvbjk vxa result of moving through a potential 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 isbaj1jse4 ufs4e:; c(c a 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 correspohtr e3xlb iv +:q0,r/fnds 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 di dxvpz, r9rvtk 3j,7i3stance of 2.0 m from a positive point charge is 100 V. What is the abk i3rt,3xpdv zr,7jv9 solute 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 je w miq0y*:a6 sc-j5da negative point charge is -100 V. What is the absolute p 06j5jqc:-way *desmi otential 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.gocxfdkgbg2b 8* .1/ wxl8nc the exact center of a square is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absoc.xol f g*/n8cxk2dbg. w1bg 8lute 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 isldoee+ vlzs6*) f1po; 3.0 V when a charge of +Q is located at one of the square's corners. What is 6dv f oo e;p)1l+zsel*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 charges n68m3dccrjck,.bdo ) 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, y xjo s*-( 8p 3gvfrgezpq0ilga9t*1 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 :re cb69th5 cm,bq0ptrespect except that one has twice the plate area of the other. If the smaller capacitor has capacit6h5 cc9 : mrte,p0qbbtance 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 capppj1 mw7v h*)y yaqw*:acitance of C. If the area of the plates is doubled and the71q yyahp ** :wvp)wjm distance 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 ry/d qm2 /mf3vremoved. The plates are immediately pulled apart. (With the battery disconner3qm 2dv/m/yf cted, the amount 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 between the plates of a given c c;-ijr3+j0qe7,qdz ) k m(ziff pfq5qapacitor is weakened, the capacitance of that capacitoz+j ,-kcqzfj q i7qrd3q50pf( ;m)fier

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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-p5o/b.y*z/nmsg s 7 fsvba4 03a il3ntblate capacitor are maintained with constant voltage by a battery as they are pulled aa70 s/i*ynm/.l sbatbn3 gvo s 3zfb45part. 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 1vqb,jag08)mxl 7efa voltage by a battery as they are pulled apart. What happens to theg 8l)q0fv ,xaam1 be7j 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 pw r pjq97fq m *32e*wcve+4+zelgp9aa dielectric material between the plates of a capacitor.92q*p 94v zmlegac+7rpeq+ p 3jw*few
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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 capac7p-8znoplkm(mz: qpa qq )vx*ai z060itor. What happens to the cao q00p) 7pa8kpqnim *-zz(avxmq:l6zpacitance?

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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 betwrxrza/* r) t**nr 5fwbeen the plates of a capacitor holding a fixed charge. What happens to the electric fiel)rr *zw *nfrax*r5b/td 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/js-p 3i42l ys g5j+jp )xeun sf09bma is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in s/l9 spybx0ue)3s4jgfs+ -jn pi2am5juch 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 alc.7aqxaa8r)1tk f2i constant charge causes the energy stored in that caxlaf.t ) qarci8712ak 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 given capacitor causes the energy stored jcfms:,sb**ec dwq/,s 282g c3 9kukgeg his2in that cgsm9:,2cw,e/3 8g22e s cjcf*sh qdbkgu*ik s apacitor 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 movef ;/4crv4udtf 10 C of charge from point A to point B. What is the potential difference between puvfr/fct4; d 4oints 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 blj99+rx nr(zm oi,giy,uk68the potential is -50 V, to point B, where thelrxb,9 jy,+zm gir6on8ui9k( 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 thrg. ket8.jt t*aough an electric potential difference of 500 V. What is the kinetic energy g8 k..ejt*tat 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 diffm9 wd/j(4ec2w5zr rotgcm-7hos0c: perence of 500 Vg ec c49c2p/h(oowzm5m 7d- rwstr j:0. 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 proti:nfnldnwdv (69 )e-a nz,g)yon falls through a potential difference of 1200 V. What speed does it acquiryd6zn awnn(id -fveg )9l,:n )e?

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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 movingmeye77dr0 g 02t4xnv awcf b;0 $8.5 \times 10^{18} \; electrons$?

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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 on5l2dd6py2 pzk o286fgvl gl3f 500 V. What is the velocity of the ez2dlo6l y8g3p6f k v5p22nlgd lectron 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 char i1zud(:l* avqge of 20 mC. The object is accelerated from rest through a potential difference, and afterwaruld1:i *z( aqvd 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 potentialavi5dq22 ho6o difference between two parallel metal plates separa i6o25q2hvodated 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, is directe5b+/p* h(hkjt :bj ihsd parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x :sjkp*t+5b h(jb hih/= 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 zcj-th- 2r.v yx9i )mri )fs:euz(z(zeast. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1. :s i))uj2.zf -(9vrzcrx iety h(-zmz0 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 along the directif-vlutqy +99o7ju hvc m,1et9on of an electric field of magnitude 3.0 V/m. What is tm9 ,9 l9-yvc7t1 fvouehjt+quhe 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 connected to a 12-V batt nn*oe3t8v h(xery. An electron released from rest at a location 0.10 m from the negative plate. When theh* v3ntno (e8x 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 kxn-acm/ts5x.rud4)xw f4l4 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the elec)x/lxs ca w. -xt4kf4n45 mdurtron 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 12-V battery.ejlyr7l7pht 9; 8)osi,; xr oidj)e p) An electron released h7pt8); 9;iprd7 ls ),oele ojrxyij)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 electri/lttj c(8q0b6utb59misem9+ v cyq 4p c field of 50 N/C directed toward the east. If the voltage measured relative to gr5u0 b vtts(ql/6 9ip ecmyq 849cmjt+bound 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 h-gtjj, xp 0d1+ ai/gjtoward 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 point 1.0 m dirait1g j+ -p0xjjd,gh/ ectly 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 will acquid*oykz2n 4f/at;u wu .t h+mij,2fd e(re a kinetic energy (i.e,u*+o t; 2idty hkjmz2 f(4 /unfdwan 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 potentiai2:p) bkq8 mgcl at 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 meter stick. Find the electricac.4 k ccfq8yon(7vek 4l potential for the ccnvecc(k4q yk4f . o87enter 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 auop, 8i6dwc5u7 nmy uzfzm3/7 -2.0-nC charge is at (3.0 m, 0). If the potential is taken to 7uiw,o zm65/fzuc3 nym7up8dbe zero at 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, 0zr 6 p:-zbc)x .zy;znb) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infini n-yrb bp):zxz.c;z 6zty, 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 -2.0t1p ux(.rtnx*ckbe1n l( )hs- -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 charge fr1s(lctn.t)exb(n*k - ru x1ph om 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 x22+w t z5wvujv1mao s+t7 j;lw4k fy2the 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, a42z+w+l; f2uko1 27ma t xvv5j tywjwsnd 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 placed in two diagonal if gv6l88:qqlly opposil88:6 f qiglvqte 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'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 (char99a9 y3b6t* i rcqffvage +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 chargd5nl+79sbvba ;4jucnim . 0r4dw+ u njes, each of 2.0 mC, at the corners of an equilateral triangle of sideadn4n slbjbnw +74dv+r95 u cm0ju;i. 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 ofp; 46vuerx8gr31 xwix a 2.0-mF capacitor when it is charged to 10 4xx6wvu ;1ri 8grx3ep0 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 ha,*/pqoeu2 dxks 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)vyih p6clv.kokt6(/y ri :qvkm/y,h ,a:fi 3 filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what,v(6yl,i3 vfyp/r ahmc :qvk6.i:ik )hyt k /o 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 plabl reu0w7ukl./,t:u 1 vohi* ites 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 prua4: z(io7l jlate separation of 5.0 cm. If the potential diffea4(u zl7ijo: rrence 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 9f exfoo vu7l/vk) )(2fgbok1 across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5).go(7)bf1u ovklk 2/oef vxf)9 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. Hg/a gjiext 23,ow much energy is stored in the capa3 gij/a 2et,gxcitor?

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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 b0 c:66n2un:c p juop1xj5ycsin the capacitu6b0cos1 cj2 x:npcn 5jy:u6por?

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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 ontn2+k hqic /p2lo the plates of a capacitor when it is connected to a p 2h clnk/2+qi12.0-V battery. How much work 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 x-:ywq;is e j/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 capacitok*ep.r1bgtm ndk(+ q:r 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 */5 h,ncu8.w w. gbvv*ovm oavof 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 conj*j v7ahz ;qz)sists 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 pbfng0l ,v,d-v late 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 u me(62 4qng5v*y:fk/g/qtnd rpj-n dconstructed 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 h8afk/ k ku0zx98d: hafully charged. The battery is removed and a slab of dielectric that completely fi8 z ka0:/fh9 hakud8xklls 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 50-2 8,3z 8mjvkh)stkscbyw c3 r/V battery and becomes fully charged. The battery is removed a3)m2bcwcsv rsj8,yh8 kk /tz3nd 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 voltage across the capacitor's plates after the slab is inserted?

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