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习题练习:Physics Unit17: Electric Potential



 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 vect95m* qresr-oeor?

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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 is 7if)dfd) ff/ cg z2d0ea

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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 surroundings. Objecusxfo 3it.b1r . 1oi/jt A has a net charge of excess electrons. Osor/f1 1u.b. xo3jt iibject 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 o7,jktyj,7xuqp3 gq 40 loexk;f 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 upsg)fvz 8sjt /s q1:* z3ppgy 6r5po-direction 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 sphere. They(; c6kmy.q r2qds me-g

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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 ,zf iijahq,, ;o0uij+:t:qszgn+ng 8 by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ball b:z ,fih:+z0j n,qu inostig,;ja+g q8e?

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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 potenvf.g1m/2;6+7,x e : ia+yph wmdndrcwwg -kpo tial 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 au l-y m5 ;oxyxbaxk51.n equipotential surfaceky-;ao xbl5x ym.5u1x.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface m0q-y 0myr6 accii1ha,k tj32o ust 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 parjzunii:2m-,t2sw4 qsr 9pf 0fticle carrying a charge equal to that on the electron as a resulz f- 0si2,:wnmjiq2t9ps4u frt 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 is has wu0 yw0t);u nuepll-3.7za 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 corresponds to 4*gug j3ra(gs

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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 p:z g/ ceq5xr)positive point charge is 100 V. What is the ag/er q)xpc:5zbsolute 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 jkt2 xl7*m99zbxuq 2k a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point chargek9 klj ux7qb 9mtx2*2z?

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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 alfd;rucz b 0btx-b,.+k(5, cfdn zmi3 charge of +Q is located at one of the square's corners. What is tx,d+lbu5,zk0; c -b(c .zt dbmrn i3ffhe absolute 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 cent -5oxs*ga9ocs er of a square is 3.0 V when a charge of +Q is located at one of to axsg*5soc9 -he 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 consistltdq,pcm/.8kx+pe /k 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 a c opn60d8)dfis 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 identin:9xa (izfg .tcal in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one haaf:n 9g .i(zxts 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. If the area of the platesj b: aau1jdo:2( osi9q is doubled and the distance between the plates is halved, what is the new capac j2 :oj1(q aaosdu:b9iitance?

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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.thzy8 k 58gpz; 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 pla;ky8t pg8 z5zhtes 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 pvqgis07my by3 7 +1vwof a given capacitor is weakened, the capacitance of th ywiq+370y7bspgmv 1vat 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-plb-kl mw1rgdfr 9zo8* /ate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the pl89* /gkwlf1morzd -br ates 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-plateaortlz5q z64ojb .4s) capacitor are maintained with constant voltage by a 5zsoql6tbjorz4 )4a .battery as they are pulled apart. What happens 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 dielectric material between the plates o g(e+l/czk.apu0v 7b of a capacito.pv/ 0za (e +ulokcg7br.
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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 cap/cs7j uhi/ 7uciggj m +inq2(4acitor. What happens+i(n/27 chsc ijqjg/gmu4 7i u 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 papjga9cs es:p 7sbc9 zya6x3pkw 2m0h8p-x0n*uer is placed between the plates of a capacitor holding a fixed charge. What h7 n9m0 pb gcw9e2jypp0s kx8uaasx-z*hs:3 c6appens 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 ton) ifo i*0jaffp/o(; jiwm:v6 a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The ena jiff/m(in0v o* 6p:jo fw;)iergy 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 6 ziyw5,qew0 gvpc 21rc9lmj)constant charge causes the energy qrw )jmcc 1iwplvzg65,ye 092stored in 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 u ;ndua7r69sg given capacitor causes the energy stored in that capa6;sunduag r7 9citor 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:uaw n9pji )u9,khc*m point A to point B. What is the potential difference between points mhc9:j* ,k auuw) 9inpA 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, where9jk7qypu r/8j n7wqu8n2 ayoi:cbs 6) the potential is -50 V, to point B, where the potentiauy 8swic/7yqu9n n6 8 park72qjobj):l 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 potentsvs rgo4;d/ g8ial difference of 500 V. What is the kinetic energy of the prs/;gr8gdsv4 ooton?

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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 differ /7d d:j a5;rm-phcypyence of 500 V. What is the ;-5jpyd /hcy 7r :mapdspeed 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 1200 V. lurp6fuy8/v6u3p vbvh/. 6io What speed does it l8hr . vpvybp6uivu / /f6uo36acquire?

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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 moviitji5x( 4fk 8s 0bnut4ng $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electron vuaoi/xcm 5dg j0/alz srub/kyf) :hv0,9: 4zis accelerated through a potential difference of 500 V. What is the velocity of t9ur5lz 4 ,is0a xvu/:0:)o/ mzjf/cv ybd hkaghe 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 from ,x(n3gzlvc v 5g,q lxm1 4il(dxac6j/rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the pggmxav /j4q1(c,vl n(3xlilx6c,5 dzotential 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 diffe/nn3aen (7o7jfw; riqrence between two paralleieq n;w(73 7fjnr/onal metal 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, with a magnitude of 500 V/m,jnz o*-. +:g7xzohwsw is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potentiawzo:.hzj*w 7sog+x- nl 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/C directed toward the east 2n9t f+.to pvwuf8s4l. If the voltage measured relative to groun.fntw ltf 9 o24+psvu8d 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 alonq3 ,wh v/zefz2s0r6z0ovm0b-vpov p3 g the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetim r2p-h vp3/,06fbv30q vwz oze 0szovc 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-Vvkvu9g8e- ((cgv w :jf 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 plate, what is the potential diff:9v(gvjc (ge8- ufvwkerence 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 0.20dm,rp3u 5hv.w :q5 fah 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 at a distance 0.050 m from the positive plate, how much kinetic energy doesf ,35um:rpa.qwh dv5 h 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 2w+evfm 5ylzgt h:2sv b e(2m1a 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 0.050 m from the positive plate, what is thtgbvv(fz 2wy1sm 22eel 5:+ mhe 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 electriv6 e7ne1 2 mle9r9zwl n90ycvnc field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point i0ewy1zn6vn cr7l lm2 ee99vn 9n 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 electri5qt.gotod;r sq9 pa8 xu:p q,3c field of 50 N/C directed toward the east. If the voltage measured rel5 ds9q. rg 3u,op:t 8;oqtxqapative 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 potentiaur;2 nmdr;i6 dl difference of 12 V, it will acquire a kinetic energy (in the absence;6d;nm du 2rri 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 a distl 8-8( eh(jscffk)f myance 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 thf 1o9hcrnczof;u 1t :4q f19b1n5 kbone ends of a meter stick. Find the electrical potential fn cfu 1 nn91zr k:h1f1fqcbbt49;o oo5or the 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 b+q8c1 eyh ;tcy.edllsea(c( 30pyy4 -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is th8ydct13 e p 4 leyhye(s+0lb.cacy;q (e 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 -2.0q4a 0yu,)w(c )6zfkehz7 9exg)cip zl-nC charge is at (3.0 m, 0). If the potential isz(0z 4 )9acxklq c e)w,e7pzufiyhg)6 taken to be zero at infinity, 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 v.vagtc b48 8wis at (3.0 m, 0). If the potential is taken to be zewvtb g.8va c84ro 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 are placed at the cornmxqd.:vp a( 9jers 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, anj(:m.v a9dqp xd 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 +4f.yjj.sud x09y: vb 5t.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of v 0.ysduj.9jt5bf :yx+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 (charge +2e,nw4*nl6 t1srxw9l6g e 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 pl8/ b todv+f88y7ddw0lpsf-sdace three charges, each of 2.0 mC, at the corners of an equilateraf7o tws8-b8lddy0/dv8f +ds pl 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 ao)0j to fz:*yubsmd2 t68j;qc 2.0-mF capacitor when it is charged to 10)j68:um t2yqodsct 0b fjzo;*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 capacitor) 8u, x+enp8ubvx a1qd 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 filled 6bngzb:xo 9 gx3lnb /(with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the platgn/9(bbbo 6 xlxn3g:ze 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 has9q x23jimy+16fwqr as 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 s3ad,be) x8mht z0mw p/eparation of 5.0 cm. If the potential difference betwee0at )/mb3x m8 zpd,when 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 connej c*ctw i f)v:7 gico(ndm+);kcted across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows: owc m;c(*v dictjnkg+ )i)f7 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 stored in 5,nj*tlllv ;e/r9auv 5t 5+wel)xo kz the capk ; atxjz ullo*) ell+n9tevw5/,5v5racitor?

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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 ite *r)1 kejmc- *df-kzu( m.okn the capacitor?(d)r*eetkjk1fco-uk*z m -. m

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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 whevu lta.,sk y:de12 h.dn it is connected to a 12.0-V battery. How muc1.l a k,.hustvdd:y2eh 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 imkx 7+ul* hicgx)kykv61k hyoo4/j; 5 t 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 consists of plates of rfx6m n9d8blw3 jt-/uarea $1.5 \times 10^{-4} \; m^{2}$ 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 of6 f b4t eie99cn0x4be3vkymq. 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 capaci ;tns3o8kqu /:va:eml 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 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 con.ky1qt9+rqp 9.g ;vd6ymy nkw structed 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 ar/ rju8ly69g 7(hdnx qsy75 airea 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 battepe;d)a 0ocnyjk j-v6t9lup x(08y yx 8ry and becomes fully charged. The battery is removed and a slab of dielectric a8d)c; x uyevl6kj0y jp x9(0ny8to-pthat 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 battery71:rjz ed903jmjw qavayd9w u h3l;2d 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 5.0, what is the voltaj3: q mdy3e9adzjw7jl1 ahd ;9rw02v uge across the capacitor's plates after the slab is inserted?

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