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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 vector?uhr8 0lb, 5jl: cxzpx l18ym6z

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombq mgj1krw--/*ecib1 h is 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 insula jhv0n,b7iv2tted from their surroundings. Object A has a net charge of excess electrons. Object B is ghjv2bv,0i7tn 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 direction of the electric dp(ofiq)n /7t 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 b3rl8f av:e(u 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 sphere. Thka 5 3u)crar*oe +x;ak:i92h9y q fcjiey

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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 res; (h os3ar67vj7zifhon ,bba9t to a speed v by a 500 V potential difference. If the potent3 a7 9aih v rfz;,bn76o(osjbhial 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 py rp14c0(ng8d esmm*um0 : wuvotential 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 8h1,aqxc aol3B along an equipotential surfac, aclh8qa1x3 oe.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mudk2lt63q;obf -j sj h,st 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 to that on the electr4*bfgn-idhiiaj wmd,a35; r ( on as a result of moving through a potential dih f 3 5w4-j,mrdinba(d ia;ig*fference 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 unit ga 3 0fibb47- r ;fb)2 yc0n9dcqhuv (p-taerkof

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correg. hq;c7hy 81 nud58fug pf:zdsponds 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 po4;bbnm2+5a5 bv0is.b yaaoj u int charge is 100 V. Wha.o2aa0u j4ms5b+nb5v;bbi ayt is the absolute 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 distanc 5gh1az/*n,rc y :vmk c+rv(jp +mfa1te of 2.0 m from a negative point charge is -100 V. What is the am,vr +z 1(/akt:cpmh +v*ncgj1r yfa 5bsolute 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 a square is 3.0 V when a ch 1o9l2ho2p9j2(b v nnq3avh l u4hc9jiarge of +Q is located at one of the square's corners. What is the absolutj2j cv9lq o(2hubl 4vn23hion9a9h1p e 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 is 3.0 V when a charge of:i bsw566yc/rpuk 7ri +Q is located at one of the square's yb 6irskrp:/i5 cu67wcorners. 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 of two )x f+ybzbz u7wka9s8, 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 gl 4bubrb*o 70is 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 rb+ze 1ln393c0xu kppgm l0n2 sespect except that one has twice the plate area of the o +0e x29cpz3ln1pbsnuk mg0l3ther. If the smaller 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 capafyvfo.mq 8q7+6z8 jtr citance of C. If the area of the plates is doubled and the distance between the platezq o78+f8y trjmfvq 6.s 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 i g.mqk83:ijerpes:2 2k)sek c s removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains conrsikqk )8esk 32:eegcj .m:p2stant.) 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 )vr-a iwouas0a q,a7ea+45zy capacitor is weakened, the capacitance of w7ez 4 yaaqv , +saaro0uia5)-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 capacitor are maintaig/yhkl:o6k dd8/jf/mjb 6 1uined with constant voltage by a ba 6oy/jufm k1 dik:j6h /gb/8dlttery as they are pulled apart. 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 3m /oc grk zx b.fz1,5lx5u:iwconstant voltage by a battery as they are pulled apart. What happens to them1czxf wbk5iu xr5 .3z:ol ,/g 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 betwee 4eoreyxu21- in the plates of a capaciu2y4 r-e1xoe itor.
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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 betwtx,h :mz*fj* deen the plates of a capacitor. What happens to the c d*ht*j m,xz:fapacitance?

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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 papex ci v;he7.yvijt*r1 4r is placed between the plates of a capacitor holding a fixed charge. What happens to the electric f ivh74i;e* 1xv.r jcytield 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 capacitogeio:czbgpc4qu l nz :6p34l.5.ufmr 2vi:;mr is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation betwecq4m;u pe6gv::zib r2l.lfzc n.i:upo4m5g 3 en 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 holding a constant charge cau52l5nqdr kqq(ses the energy stored in thatqln qk5d(25 qr 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 capacitor causes the energb +oxem:gdx h *k-69)5bj vesxy stored in that capachbexx e+5k b*d6v)os9xmjg : -itor 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 A cpgg8tpe0l, , to point B. What is the potential differe8pg,glp tc e0,nce 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 thj6w 5e 0(d jwqqfm6it*e potential is -50 V, to point B, where the potential is +50 V, df0w5mwe6 (6qjj t*qi 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 r rqp5(fce:(kb7b 2meuest, is accelerated through an electric potential difference of ce 27ur5: kbbpe(f(qm500 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 elec) xaqr(rc upg09ubq ml,o7(u9tric potential difference of 500 V. What is the speep r7 q),9 m(rblxcog uu9(qa0ud 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 througy jnjzh-l()h 2h a potential difference of 1200 V. What speed d(-)jh znj2yh loes 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 ikl9hizqyc)0au g4:v,cq0dj ) n 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 d n.8 .;odxbrkk ;rdm7.epoc6500 V. Wh8kmdod;d crnk .7e6 ;bo. .prxat 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 obj+f3,z; ijj/e t -nue2/qh)pm w5y peukect is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the p +5pe-jzf; u)jehque,/23 mtni /pykwotential 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 differend2/ex 6 uwqr9d*sff0nce between two parallel mx2f/9f0e 6*qdr nd uwsetal plates 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, w lgkx4b +64zhwith a magnitude of 500 V/m, is directed parallel to the +x axis. If the potenti6b4xg4l w+hz kal 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 fq.m 4e5l:u0bu-vh ,l:ew klmcn8gj/sp 4a.umield of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, whatwpu:v k.5elb g:n4m4cl8m uuem -/h, 0q.aslj 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 m aloot8q.: 3jw+d d9nr gxtng the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the prodwd+:.j t8tng9xq r3o ton?

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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 connec eg *9.;m/e9+zqte gai m, j-wppfl:gtted 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 distance 1.50 m from the positive platg+ *g9, :te.ql-pmmgji 9 aepe /;ftzwe, 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 1y a-6q4 i /vjipezu*svm. h;1er p3t*y2-V battery. An electron released from rest at a location 0.10 m from thesmq; 4 yjea thp*e6.3 yuzvi1r-/vpi* 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 tfl::/uew p 7v1xh 0ez1aev8dlo a 12-V battery. An electron released from pa dxve/le: z7e h8:w1v0 ufl1rest 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 electric field of 50 p s; cdm4u (vnrf- 3n*sfyv4:lN/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 directly 3yfl v4scf-;4* nrpn um:( dsveast 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 dire6z 7j 2rw9tp jrjv(/gfcted toward the east. If the voltagej7pwrvrfg2/t 9 6jjz( measured relative to ground 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 dijx/6w,s fwx 2 p0iz+xifference of 12 V, it will acquire a kinetic energy (in the absence of frictjs xx/ ,ixzpww6+f2i0 ion) 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 distance ofjy qog5ng r;q ,/cax*9 $5.0 \times 10^{-10} \; m$ 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 ajr w ph7y,t*d1re at the ends of a meter stick. Find the electrical potential for thw7,dtjhpry *1 e 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-nC charge is at (3.0 m, 0). If the potep j;(r,cvhi9n;cke.cntial is taken to be zero at infinity, what is the electric potential at point (0, k,;hrpv. ije cc9;c( n4.0 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 chargem8xoa m kmu w2ulp,r:4g*ua8b(23bf s is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at :b x28 a3muswu8 mr 2(kpfloub*,agm4point (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; :yd; 2.(mp( lyd.d,p)wl q)wsebvmepcu1 mt 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 from infinity to point (0, 4.0 2u ws v1ey.;plw bq de)dc( )m.ld,;:mypp(tmm)?

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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 ahke cvawy*b 7 ;-y;w;gre placed at the 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 c;-vkw7heagy yb;*w ;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 placedz,)) fpy41fx7iyf (*zi mwg jz in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential in z wzy f)1,mj* if(4pif)7yzxgthe 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, hv5zd5fk7tr9 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 pla3o8 ;cp,hplqr45kf r *0gxc ihce three charges, each of 2.0 mC, at the cornersl,chcr0 ;hro4kf5pq8p3ix* g of an equilateral triangle 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 plates of a 2.0-mF capacitor when it is charged*e yvi/)dx+u fk9q0g e to 100xiu+dv 0fq)k/e9 eyg* 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 capb72wj tm sj3a0n) h+qj9uissjny( i: 9acitor has 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 filla -oa8ydxb30 xv-t *yred with air, and the plates are separated by 0.050 mm. If the capacitance i -ox-d*8y3b yraxv0 ats 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 capacitor has plqxy.x9gyji2ijo9 psc )q* h28 ates 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 separatr4ky*w7 v-+sn tfg-f zion of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, -*fzky7+-vrs f 4ntwgwhat 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 conp.99 /-v riw/kyxdgpz,srr 4hnected across a 100-V battery. After the battery fully cgv h ,rpw4r/s9idy-z/kxr 9 .pharges 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 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 sto :(kjkt .vh9psred in t(k ktvs j9.ph:he 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 i k5jbi+mms2ow9;71vqtm c/ nwn the capacit+o/b 721;wsmq5cm tnwj9 kimvor?

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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 connected l;m(x.a01gtld axty0to a 10(yxa t0xall gdt .1;m2.0-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 a :a-ncw;ehs gb)4e1 jstores $2.0 \times 10^{-3} \; J$ 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 of plates o y9zaaay ;ja4 d63oa,/at6oa af 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 plate fc8t5n+od by+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 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 a m-t5 umme3zwmrh915m*ju b7 erea $1.5 \times 10^{-4} \; m^{2}$ 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 iklw ha7 y7).ru5zh e6es 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 )v:+sh(3n319tehjjkoni w yz 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 50-4zw 6cbo :4tc/japy pyz.f .n hnfr0b9e+f/f3V battery and becomes fully charged. The battery is removed and a slab of dielectric that completelzp3c9by.tf6p f:w+fn e0rjc/ azoy 4 f/b.hn4y 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 connfwqvmvzo6 r3+l ,kb 4ybjw6g-t s5:c4 ected to 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 th35ykb 6w-4o fg4z6 w+st :v,mrbq vljce 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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