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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 followij ipak8;i). ntfnei66n x2b4vng 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 mx(32lyy h:hs5;2yr)cl w t/:qzk r uvis 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 thes bfwp r5a; .8mbo1j3zir surroundings. Object A has a net charge of excess ele; za.rb38 fmjs5b1po wctrons. 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 of the elecpd 65qc7f6nm( u7yo wqtric 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 1.zbtx h5f7pu 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 arwmx uswv25) 0ce placed 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 is accelerated from rest todyv ws2j 12g iqd8/p,p a speed v by a 500 V potential difference. If the 2wgyvs ,p 1p 8/jdid2qpotential 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 f0le/hrgl .s ;same 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 e ,l5q1txq vf7u f 38.iihbaaj 7xv71rpquipotential surfac, j37faiv x7u.fl iqpbr 1t1q78xvh5a 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 bexu3zhw,ku 17y

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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 pa 6ps:zncsjy-f7 ce/e9mm5l3 j8uvs z5rticle carrying a charge equal to that on the electron as a result of moving through a potential dif:5-cj3eln9s zsyv5uzjfm8 mce7s6p/ ference 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 uov. sq7 gdbwuhtpj+t,r0/ *r *nit 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 corresponds5c4oc9d0x q fdt1kxyd l9 3zn0 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 ekw3 7(o:jvr ,92jrw n-rbicaof 2.0 m from a positive point charge is 100 V. What is the absolkaj7e-: (crw o39wji nrr2,vbute 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 mc kc+odeealhvb0)8d su1:w 24 from a negative point charge is -100 V. What 0ck+seublw1o2c8 ah)v d: 4edis the 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 exact centp auf(x16 vo vp u6**gm.gz,kper 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 at the square's center when each of the ou. *6 6 ouk1p*vvpg,fpzxma g(ther 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 whent 9khf4r /gybcl s* iw1qw932r a charge of +Q is located at one of the square's*rh 3brkgc 1wfti w2y/9q4s9l 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 yu g tjs;iz4d64fn;+* /h dluh2k(fa aconsist of 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 isvx *h+ lj:o.fqy)dld9 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 0y;og/5en9l9l mg kq ain every respect except that one has twice the plate area of the other. If the smaller capacitor ha lkm9 ynq9 0g5g;al/oes 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 C..psl7;qqx v .aeem4,v If the area of the plates is doubled and the distance between the plates is halveaspv.e; 74xe,vlqq. m d, 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 remog /quv1x-m-duved. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential difference between the plates as they are being separatex vg/-qd1u mu-d?

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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 giveks-nl-j;wn 4xn capacitor is weakened, the capacitance;swnj-kn - lx4 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-plat m1q2ma3mfh- lg-2l6szura(ze capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of q3mzu za1ah2lf6mrg 2l( sm--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 maintainedpr9yj/vxnpgw-i - (m 3.wde/d i*sa 1b with constant voltage by a battery as they are pulled apart. What ha m1-vy*jd/x- gadinwpi(p /eb9.sw 3rppens 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 dielec;52hi,jpd oraq.ffz 9tric material between the plates of a capaci fjohq5fp2i, ar9;. dztor.
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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 betweebl(u.evf*.fw ird/6h-cp +hjl i7-lzn the plates of a capacitor. What happens to the capacita.*fj i lde-c-wlr v/u+ lh 6b.7fpihz(nce?

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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 0z.3b m bn-hfo7aa3zcn b,4 ljis placed between the plates of a capacitor holding a fixed charge. What happens3 nn ,7mh-alb fbb4 ajo.zz3c0 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 conan-fhls)0ie dh+4gb : nected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation beh :ain0 -ldbgseh+)4f tween 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 auke56:nt jc9s5dz knzj .;n /v.p4dq s constant charge causes the energy stored inujn ktk9d 5 czndz6vpj:q5 /.;sn4.e s 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 capacitoqfejk5* :5k3. b )vcv8yptx jjr causes the energy stored in that capacitor t):8vcb.kj f j5 v5 exkqjyt3*po

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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 chf jxb/b6ez- d:vu- d0rarge from point A to point B. What is the potential difference betw:bdu/fjxer-6 z-b0d veen 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 fq97c cuboo22h rom point A, where the potential is -50 V, to point B, w occouh9bq722 here 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 a xt8 m)zfx vi9 -dpmfwwio1,64n electric potential difference of 500 V. What is the kinetic energi9t1f 8xvzp o,m)f-4di mxww 6y 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, 0:;t mmswdo q7is accelerated through an electric potential difference of 500 V. What is theo0ws7m: td;mq 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 potentia.8g9l36 s dlxp-j x rt(rca,pzl difference of 1200 V. What speed does it acq tx-9al6 zc3djl pg.(8xrrs,puire?

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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 ,vhx(quul(:v svg .iv6t i*:n y k(ov-in 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 dizndj;9(sp z4iq o;u,ffference of 500 V. What is the velocityf; ios4un9j(q; pzd,z 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 object is accelerated f892 6o( *pcc2pbk),tuio xdap ;wr qnvrom rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential d pk,6b9r8uqao(x pivd2 w)n2c;cp*t oifference?

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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 differeq i* ; c)pcspjv(pwx(+nce between two parallel metal plates separated by 1.0 mm. What is the electric field between the p;(cpppc +ij*)w sq( vxlates?

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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 directeda)-la bgz1i-w brg7h.n9bx 0w parallel to the +x axis. If the potential at x =.n)-bw9 ig7z lhw1 0x- argabb 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 mripx ll2/6 jt1ox ( kyt0pa14of 50 N/C directed toward the east. If the voltage measured relative to groundprxllyki1tm4oax1(j6p 0 t2/ at a given point is 80 V, what 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 along the direction of an electric field of magnitude 3.:72xbbc- kenk0 V/m. What is the change in kinetic enbxekc bn 2-:7kergy 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 *mdjnzy g (26wby 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 elz ym(*ngjdw62ectron 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 connected to a 12-V battery. :wgi tll(o w s(u4lh 05alwm05no8w3e An electrn5mso(ow3lw:0 8 l5 4 ugllw0et( ihwaon released 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, 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 batte9bvgpe flb6k1e mrzi/a2mvaj)-49x 3ry. An electron released from rest at a location 0.10 ve3jam bvm)kr6 /p a91gx f 4zilb-e92m 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 N/C directed toward:8xq;do -a3b6idwyrno0g *qd the east. If the voltage meaody8 ;q*qa3rw:6bd i-x0d g nosured relative to ground 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 elxuu,4v bg2qq47 f1cbh ectric 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 directlybgqvcub2 1 u7x ,4qfh4 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 aq,ui crqi 4v 3g(ecgryuco6b7b9 ,6z9 cquire a kinetic ener6 cqg oc4er 76gb,,(v9zi uq 3yicub9rgy (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 at:qy;/kevi ,lu:u jeotg j7s4ki-g+ 6 )0qzrmz 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 electrizpw* npaemi/a /ust67s a68a :cal potential for the centa:6/anaes u8tzw a/mp s7*pi 6er 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, 0simp9bnl+8c 3) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric poms l+pc 9i8n3btential 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.c 9.qcuq9o7c07:z bbc8ilpxmt5b) kt0-nC charge 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 point (0, 4.b7:mb 5 iluco8)q xq.ctckc7zp09b 9 t0 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). p)ib*b gr 0pv 08fux0m If the potential is taken to be zero at infinity, what is the wor0bv)pgp x0f8* 0mrb iuk 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 charg6cgif/wpy;f:f8 mvon 6g9mc rt7 +t (te +q are 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 = +f/ fioc968c :w;tmg gtrn(6pyvtmf7 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 plpay5i;pn h pa )rs2+a4aced in two diagonally opposite corne yppn;sp+a5airh 2 a4)rs. 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 (charg,i)x s60 hg j0zptq2no b:cioum)o;f6e +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 thui0z p s+s*g.x m+cej.ree charges, each of 2.0 mC, at the corners of an equilateral triangle of si+ezjus*+gx..c imsp 0de 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 t4i-cimo3 mm- ohe plates of a 2.0-mF capacitor when it is charged to 10ii3o4mo mmc- -0 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 capaciblmbuk :47c3gt1 vy0e4 ;wdector 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 filledya. q.3 t yrtxq5qyc1( with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the .y rc tq(3ytqax5q1y.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 capa9 .l9ibmc/:fpx1jr qf citor 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 separatiytzl )/owg98zb ic7 ;zon of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at thezl b;yz9)8t igo7/wzc 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 bafoy;; 25iqj4 c xxa*lb+x/ qidttery. 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 batixxqqb/ 4*d +a;f 5 2xyolc;ijtery, 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 placc7)sf(hcud h6 ed on a 15 mF capacitor. How much energy is stored in the capacihc(c )h7us 6dftor?

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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 15prv+;d8*r mwmxq 5i0g gj7k:c mF capacitor. What is the energy stored in the capaci g:+ xidpg0wm 8rqv ;7jm5cr*ktor?

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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 capacia pk oz5i c5, o..)xoczome4xzz x*v(/tor when it is connected to a 12.0-V batterc)oexopi5. *zzc .kaox(v4,/5 zxz moy. 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 sto)h/nfifn0g 4ores $2.0 \times 10^{-3} \; J$ 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 capacipp * )vfsvvp6jb1 nk*ds0h *l(tor 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 con (1i+s 3nzp,eel9uv8*uy7 d;jfprddb 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 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 platef hvu.8g:aib )jxzd.* 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 capn6s c 7(wpejx9acitor 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 with plate area1zwonf0uc 4x-h) .acb 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 charged. The)r0ti k( ez5j1e94g jkhz h4fb 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 cap9 jhb5(4tfzh0g)z j keer1ki4acitance 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 fully charged.;*o p:zhdbi)v The batb)p;h:dv i *oztery 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 voltage across the capacitor's plates after the slab is inserted?

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