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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 vect)68yyl ;x fiyqu,i(eb1 gnp5l or?

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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 wlsnd bd5tsz2;ykr ,.cm55 v: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 insulated do 8i3*mv: gpuh.ra* cfrom their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at gcp38di **rvum h:o.a 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 directio9t; 2kk9ucuvx n 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 thbx yoe2k:;/- 1b7sxc9a)mrv k6 yyqrw a c7yq;e 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 saxfz9qv) o3e -a7 uma3phere. 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 ad:b pt /g*f() h p6fsvc1tawl yhmytab8;2,. n speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what w).atm 6,n/cf8ly;p:fy2*abth1(tp w d gbvhsill 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 i2;a,ef *mlw cawo5d9ds 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 equ/;yjs zinnh/6 ipotential surface.nn/zh6 s/ ;ijy

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential sur:/gmn /vhd lc/face must 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 on9f pq0k,m3 :qbnz ln+n the electron as a result of moving throug0l pq9zf: k3+qn, nnmbh 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 unit ofn j*:e-dv3xmd zrbnm8)(lo zrio; )p5

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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 t exr 7g.g1hp1bo

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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 z/jv wogo7 f++g.1ovg1 e4sio2.0 m from a positive point charge is 100 V. What is theoo 1jwg7ivo+./ ov 4egsf1+gz 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 disv;yl/3sic j pubi.g0 7tance of 2.0 m from a negative point charge is -100 V. What is the absolute potential s7j0.l;vb/i gcu 3y ip4.0 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 squaredf4 si6nzu /r7* )yeou is 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at onuy47dfz6rs*/eu i)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 + h-zyh--qs f.nQ is located at one of the square's corners. What is t .hh-sf-zqy-n he 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 char;c gyed ;w7to,ges 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 4fzru,c rmvg+me( q+1a

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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 everyz 8mzxp a0rd*/f,r rlojsi-;jms1p-4cu*yp0 respect except that one has twice the pla s m d0;j*aszcz, - u*fp/lp4-0rr18oyrpmxijte area of the other. 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 capacitance of C. If the area of the platesh.w5a w2 qfon li8jb28e*ro+4ic2 mh w is doubled and the distance between the plates is halved, woww2.2*rhaf 84q+8 c2bh wnilme j o5ihat 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 fu-*xn mw7jgq p 5g:pll m885pjtlly 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 difference between the plates as they are beigpxg-*t: mq lpn58 lp7j5wjm8ng 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 giwa.d4 q-re)w k3u cz9bven capacitor is weakened, the cap4re)k3c w.ubw za9qd-acitance 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 capacitor are maintained with constaxbm *2l 4v0qu0 klfvf*f cj76hultv 8,nt voltage by a battery as they are pulled apart. During this process, the hcqv4* lb jm8f 6vlu2t7u00vlf* k,f xamount 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-platl j(5rti+e+cmrrl. 129 qldwo-ji7 ine capacitor are maintained with constant voltage by a battery as they 2le(9di j5+r+rli q-j l w71mcrit no.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 mater h c:pgrx9 q+1gpb0 ot18poe0uial between the plates of a capacitorp+o08: bp q1rtpg90ceuog1x h.
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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 a+60d nbbijcs(hx750 3nhicj bs paper is placed between the plates of a capacitor. What happens to thejn0( 6bi+ 7ihsdbcnhc 0b3jx 5 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 ajsorhe6ojyhks( 7 736s paper is placed between the plates of a capacitor holding a fixed charge. What happens to the e7k oserysj7h ohj 6(36lectric 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 battery and becomes fully chartzn /nlbl+1)r : sq0:dc8lu zdged. The capacitor is then disconned zl)b:qur c:1+ndn8ll0t s /zcted, and the separation between 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 causes the4zn6e f-;i7 x fw/4o1me/8rl hq abeqo energy stored in that capacitor- fneq4lmo e8ozq a1w6;r b/e47fxi /h 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 in thz cken57bdt40o;k z(p. (oq qpat capq7( tpnd.k(qz pbz o450c;ko eacitor 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 poi(+fmtl /dw0j bnt A to point B. What is the potential difference bwt0df/b +mj (letween 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 po+4jsf le+-bthe potential is -50 V, to point B, where the j+el-p os +4bfpotential 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 nyu vyzbs6pnh/,pv69 *s) bc 9 2inf:vdifference of 500 V. Wha92y,ub:n pn i /fv6phsvv* ) bscy9zn6t 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 a sti7jy0ee0y-a q1/hat rest, is accelerated through an electric potential difference of 500 V. What is the speed of the proton1t7yiy/0jeas h-eq0 a?

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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 ;q po)r)opun iuunzk*i3e1:8 e g.bi,proton falls through a potential difference of 1200 V. What speed does it acquirep:3 iunir;18uge i)u ,ebozp).o*qnk ?

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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 61rve 4 n5jn x0txwfw5do 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 difference of 8mg;v/g)q / +ml 9ibg(qpd ejj500 V. What is the velocity of the electron afm/)jed mjq lqp/9 (v+ibggg8; terward?

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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 ac) dvdci2jt 4h0t opv ;ly4(h4xcelerated from rest through a potentiavxt0lh4 c 4;d (yi4hoj) v2tpdl difference, 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 lc;ua h-e4x m-the electrical potential difference between two parallel metal plates separated emh-;l4xu- caby 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, wioxpgm:t7fx1 7p2s73i: ghou pth a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, wha 31 mptix::g 77osogfxp2h u7pt 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 N/C dpw5ez p8zd. 2xirected toward the east. If the voltage measured relative to ground at a given pointz x 5w2p.zd8ep 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 magni/c 4w7l.z3g+oknptwz7wqe l*tude 3.0 V/m. What is the change in kinetic energy 7/cn4*oe lqwgk+z7w 3.pt lzwof 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 mvmp:d ykzt5i /bp*.aq6 x 8q)h, are connected to a 12-V battery. An electron released from rest at a location 0.10 m fro kx)8z/ibthvqp*. ay5m qp6 :dm the negative plate. When the 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 0.20 m, are connected to a . g0 ;bfav/pw5:ai+( akakr gt12-V battery. An electron released from rest at a location 0.10 m from thak0kpggf+; (tiab5w/:r. avae 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 connect/achvn:v,.gy; j*co sed 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 ta ;ovshv*.j/:c cng ,yhe 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 fieldi -*yyua)lhm 0 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 directly eaiu-*mha )0yylst 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 el ) gpuz50dh,hyq7;wopop u3/bectric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the fiel5)qhy0p zw /po ;7bug pd,3ouhd 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 dtpl(q1a4 c2he1xgn2p ifference of 12 V, it will acquire a kinetic energy (in the absence of friction) of2p4 pha(ex21lc g tnq1

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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+f7 j2rj 1q1/lu dejmv 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. jmzdo,y5+9m) gst+r35 78 cx5mc) wyvh d nqrh Find the electrical potential for the center of the meterr5vn75rdzmhxhgy9c 5t+q dcm3 y 8o+j,)mws) 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). tcc(1t sxxao:+q . ph-*l4gzkh) hf, c If the potential is taken to a+pc o( tq:f kx,t-g.cc1hz*4 xshh)lbe 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 (0dbrm (o4fro +q(xiu r sk6. 6d7)zyxvoh(: .tt, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is d.m46dxvor tx.y( os7hr6z rt )(+iqbk(uo f :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 is at (3.0 m, 0vwk,3h5kg m *o). If the potential is taken to be zero at infinity, whatkhk vgwm,* 53o 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 corners of a rectanz4-pq5a *ms dlxgo3 e1gle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.psa o -1lm3zxgd5*q4 e0 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 onm:0d(sq5hns f +4.0 mC are placed 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 t: dsnq(5ns0hmhe 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, mahii-ago5 04xwss $6.64 \times 10^{-27} \; kg$) 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 nece 1t20e4nid jg./mbyfnwc 44usssary to place three charges, each of 2.0 mC, at the corners of an equilay/n2wtfec. n 0duij41 4bmsg4teral 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 o/nt +gq6 4 n,8b8nh htnx1tuxyn the plates of a 2.0-mF capacitor when it is charged to 100 Vnbtxtnnxhy,/ 8t8nh4u g1 +6q ?

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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 area tcmr5 3xigu4agnn29 4$0.50 \; m^{2}$ 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, a;ox 6wvhs7 kk7nd the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is the platk7skwxho6 ;v7e 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 p7 m:kluh*tnd.m5yxngc 0h 7o -lates 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 a3yr v nj zqr+i38r45ch plate separation of 5.0 cm. If the potential difference betweej 8c5r 3y3 rr+hiznvq4n 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 i nt ft-eje 9;dra35:vbs connected 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 from the b ttra 5befd3; :-9venjattery, 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 eneru57 ,xe -aenktwg80kem/4 cu5mw 4pcr gy is stored in the capu7wgmu- c,n w/a txkk5e40cm54 8epreacitor?

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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.rvgwk;m sxswz413ed0b h6.w3 What is the energy stored in the capacitrwb;0. 6emd wxgsvk1zh34w s3or?

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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+pemjr4yzo3ntt,-g 6 is connected to a 12.0-V battery. How much wo p6g+3-tz nm r,4jotyerk 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 sa)c *;v 76kw0s ;rcneqw:vttw tores $2.0 \times 10^{-3} \; J$ 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 oft+lnaq(hbdb .r zrso22hk1f5m; 7h 6a 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 of arey,2ug1gl:12z oo:vw8 fppegtt7w5f c a $1.5 \times 10^{-4} \; m^{2}$ 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 awndy* zake14 h-app(2rea $1.5 \times 10^{-4} \; m^{2}$ 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 wle h0q :5cufoegj4ijc4v.qqh6)n,x 3ith 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 oye1yf7p( )w pxf $0.40 \; m^{2}$ 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. wif8+403yaq0sci9kz :q rfwvj 3p,toThe battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the diele0s9y,vo + w8 4c:30twzpfi jk iqrq3afctric 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 :(u12,7f c4kwnx vk iz vxjm+vwj3cd*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 the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab i31cwd z*x+ (4 7 uwcjv2n,kmjfvxv :kis inserted?

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