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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 vecto z1)9zmqc 1bne cb/9zps+mo* qr?

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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 id./zy(yk zhpmnu25i- 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 objects are insulated from thei)rhu 9 z7sadep8vv i((r surroundings. Object A has a net charge of excess electrons. Object B d(( e97p r)8avvuzshi 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 t3tl5ay)mvtz,9 xhb j6he 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 elect.w s;: nqi /mdy:dia5tric 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 horlxt/3 xintmo hotx4 ,*-wm)(llow 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 poteiln27 xu4 pzc/ntial difference. If the potential difference is changed to 2000 V, what wuliz72/cp4x n ill 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 2m*e jn(v,dgx 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 Bvzf4 hjg/g2sa04 y/li along an equipotential surface.j04 / 4vzy a/gsglhf2i

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface musrctsd )v,o .s aem(t59t 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 am pqon+a,*(fug9 )he)fzw-mxn 9 jeq / charge equal to that on the electron as a result of movinn, pg+)*f9amuq/)f 9hjw(xq oe - eznmg 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 is a unitrqp,k- r2ue+u:0c ic y 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 toa.nh9 t xkkt2 yiuy347

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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 charge i kzsxw2m,0tx+c up,u85b3atb s 100 V. What is the absolute potential 4.0 m away from the same point char t5 u,3ms0tba+c wb8,zxu2kxp ge?

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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 k+rd92cgvwi, m from a negative point charge is -100 V. What is c9d,i +2wgrkvthe 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 e+.d*r g4 usuyyxyy9- cax+z(rxact 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 absolute potential atc-x9++y(ur4yyy gaxz dr*u s . 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 a charge of * r5oz 3z/7yatuw)a yu+Q is located a5a z*3ar o)7uw uy/zytt one of the square's corners. What 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 ofslzxg c03qr7 ;7+qr jx 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 volt 5m py1qpo*k-nis 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 respect except that3*rl7/1v 1;:lf qx unftb6nmow*ydjm one has twice the plate area of the other. If the smaller capacitor has capacitance C1jtm6xlbvqy*d 3unmlw* 1o;/n7: r ff , 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 ha3f-kcv;*bz yz2; pcovs a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new capacp2k ;c3v*yv-czzof b;itance?

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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 capaci dk ;6doq 9oh6r;swiw0tor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential ro6w60 ;sdwk iq d9oh;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 capacitlwq;djqtj /sk;a)9vmcx 2t*2 wy gy ;:or is weakened, the capacij* j/g:tqw2 ;q2 )kysyxl9;at wm;vcd tance 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 capacito)j:xdlam 8(m w4ey7d qtwb 8g,r are maintained with constant voltage by a battery as they are pulled apart. During this pw(x eb7:adlm 8t 84dqw)y gjm,rocess, 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 para j:1xs.gfl4:lfglk z+llel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field du :l+l1 lxsg:kf fjg.4zring 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 the plra)t86+w6i b,g k9(qm kmccn bates of a capkmbnc gw6( t b6r8)kim,c+a9qacitor.
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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 9m:)i coy1p xxas paper is placed between the plates of a capacitor. yci9o p:)1xmx 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 paperj3q q (,9l xu4yl;kgyw is placed between the plates of a capacitor holding a fixyl9g(; ,qxyw4k qju 3led 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 a batterx.k .h.6gzfg pqj9w:ql :0 ykdy and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no chazw6xd.:9gp .hlgk q0 qf:j.ykrge 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 ofa f2ib 1b9rg.+)eacyv a capacitor holding a constant charge causes the energy stored in that capacitor to2bv +9.r)cbag ef1yai

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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 capacito hj1/7pn-mr)qy+jh fw(xlz o*r causes the energy stored in that capacitjo/(1xp*n) +zm fwh-7ry jlh qor 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 poinsh6(j (magc t:t A to point B. What is the potential difference between(smta jcg6(h : 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 c8g2ir4ztcy6 / z4mlf f:7 sbdelectron from point A, where the potential is -50ycrzfg24 lib47czf8md/ :ts 6 V, 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/g/d 1u,x lt2xu .drecv6mi q/ difference of 500 V. What is the kinetic energu/r tedq1l6cv x/2g/mx diu.,y 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 acca c.;mim+n, -5cz/secmjg9 vu elerated through an electric potential difference of 500 V. What is the vgcmcm cea;m 5+-s9i u.j,zn/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 1200j /v(w8wbgpddi.i+3- 8ltjzp V. What speed does it./p j8dpw i+lj3 t (8zbw-ivdg 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 movin4o9 3o .un wsb;rgn1deg $8.5 \times 10^{18} \; electrons$?

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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 aox.uh mk19,ip o(p t;h potential difference of 500 V. What is the velocity9(;uihthmko1.px op , 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 vm q t9;genql ;)q9q+ -5by9xteijz7c object is accelerated from rest through a potential difgnxz97 q)c;m9+ytl q-it;q eveq9 5bj ference, 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 between two para kj/f3c59n1ci/lpoph llel metal plates separol5 //c 9 pkcj3fipnh1ated 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 fielnt adrpdoo52 y+ i.n14d, with a magnitude of 500 V/m, is directed parallel to the +x axis.rpont.14oy5 andi2+ d 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 xcw ) pi-)qx1tN/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at-itw xpx)1cq ) 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 along the direction of an electric field of ma v: nd/i-q e*l7e:h a/yhscqi-gnitude 3.0 V/m. What is the change ilhc :/vq*7d e-si:ea/qnh- yin 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 1ulnbr3u-;r 3x7.nij.qo r kvery. An electron released from rest at a location 0.10 m from the negative plate. When the el1jrn3 . k.rinlu7 vx3 broq;-uectron 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, separa4tx cd-73tmp7s lffwj,3h jw2 ted by 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 electron arrives a 7twdwfjxjsh 43f-l,3pc mt72t 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, ar :l)csg160,-kgz/wxgb ut fe0 abbq9 ye connected to a 12-V battery. An electron released from rest at a location 0.10 m from the ne gf1zabl t0c-u6b g / 9wyge):k0x,sbqgative 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 elehu cwz:9.7am rctric field of 50 N/C directed toward 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 direuhaw m7 9c:.rzctly 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 e(42eqxass jz1nr0pk vyl) .tg -4s2 zylectric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is40 ssgn.) y2v z2s jkzerltxp-(a 41yq 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 vr,fsg/sl.ja;/i 7xu nvu 5.fdifference of 12 V, it will acquire a kinetic5g,f ;ivjv s.7n/sa xl/rf.uu energy (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-zr d9wj x3ti 14 caz5u;rq:dl 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 stic5n itrki6j*hgd o-z imr) )y,0k. Find the electrical potential for t-hkny)omir*g d)rj6 ,t 0 5iizhe center 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+evo- mn0f8an-nC charge is at (3.0 m, 0). If the potential is taken to be zeroo0 fv n+nem8-a 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, 0) and a -2.0-nC charge is at b0 bs30pzc9 v(f fkq2i(3.0 m, 0). If the potential is taken to be zero at infinityq9kcfb 20ps3fzi vb(0, 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 at (3.0 m, 0). If the poteuo o .wlesigrksh4l+x zg30z18 4ff:; ntial is taken t83 ozo:suhk f.1 zls;+efgrl gxiw44 0o 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 t5 ru: 8 -vnvjavdwk,l0 y:nt6are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectana jvnvu5k : 6,tl8n0 d-rv:tywgle 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 placed in two dif9l;i-(e)vyl gxt )c+ma )ej bagonally opposite corners. In the other two corners are placed chacb)j-lf xm )+t(;levi)ea gy9rges 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 (chargikxoj6nz +. x(e +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 ne 0sefjq,2 yakqbh*; -gcessary to place three charges, each of 2.0 mC, at the corners of an equilateral triangleqj, ;*sek-yf2a0 gqhb of side 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 dj: xm.*m+ zc8b7mblgeahq/8 plates of a 2.0-mF capacitor when it is charged to 100 V?lq m/mh.b:z8* mabg+d78j ce x

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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 of a-tw8uqdcv-k-: rpm4u;d5o e6k -b nnmrea $0.50 \; m^{2}$ 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, .9wkgb 6 t+dwpand the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is thed6 kg. ww+bt9p 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 capjly 9 p-.r.mn/ a2m)ztjvx4rbacitor 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 5ix7 p*mr.c. t5s4d mxm.0 cm. If the potential difference between the 7c x.r5.smd4xmtpmi *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 acrd fg,( hz5:gcgoss a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectgc (zh:g5g,fdric 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 1)birt gf )z4lcapacitor. How much energy is stored in thz)r fi1 g4tl)be 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 s;vi)(y ge)0 hmo5rv tkhp ;i+wwy+1sjtored in the capaci0r) e; gs)y+v yhwi1kv t;5h (ojwi+mptor?

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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 my ak jdgd ,-, k,drmc48+glc(of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capamd mgdcg8cl, d,-(+4ryj kka,citor?

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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 1kyxiqcf(t80j hx vu p*epuk .y1-+2lso 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 capacitor consieo*p; k/n9o itsts 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 ofwf);j 1p;ldnbt, o jd-meg1ni .i8si. 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 platef1p+: c 6yqwse)3n fvy-p+rdp 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 capacitor is in.xu3uny8 3lz;(xgrnw g)5.owg:rd 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 with plate area of )v 8hq 6f7ggx 7kh d7 gf,vlj0wyzj7gi/hx15m$0.40 \; m^{2}$ 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 ac.b; d 0 iktaiii;mw8;nd becomes fully charged. The battery is 0dikci;itmb;w.; a i8removed 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 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 nm)oj k bs):8tfully charged. The battery is removed and a slab of dielectric that completely fills theb jmns )o8kt:) 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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