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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 vegx6 61v:+xkvo thikq 69 o-qaactor?

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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 h9swu; syvg(ig54u4l 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 insulqqkh l-6dax,;1l 7-t f tzdcp24m2pa gated from their surroundings. Object A has a net charge of excess ,aladlpq- ;k1gm6p -zt72f4t qxdc 2helectrons. 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 elbg r y)5ih ;y*:asrdxx+.1rfwectric 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 directl t v2bca1+1mvion 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 spherf ,obh1h1 e1ni/azn8 9+puphd e. 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 acpq07 y l m+dezu*;7diz25 sbplcelerated from rest to a speed v by a 500 V potential difference. If the potential difference is cdz7 sm ipe0qyb*5l2d;z7lu p +hanged 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 al8 col (;0qlc:. xewf/2qseisil points are at the 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 fxbn xv5a8)o k qko+,9moved from point A to point B along an equipotential surface8of +9akq ,o)kxv5bnx.

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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 *,-rtvu mhi 3kbe

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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 th e 9etptl+lbvxc+a.;3 e electron as a result of moving through a potential diff3tc a t9be.++ll;x evperence 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 uniz7s -6kx-jihj t 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/x m2d.dh3fqf

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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 is,u2qrzym2i +c 100 V. What is the absor2 z2uc, my+qilute 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.zsy7(g9e5pts 0lv ih.0 m from a negative point charge is -100 ygpv hz s(is .5l9e0t7V. What is 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 center of a square is 3.0 V when 4ww; /m2idx7nk) d:kfn/z rpba charge of +Q is located at one of the square's corners. What is the absolute potential at the sqk /4w:;dx2b z)mn/rdw k7 pfinuare'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 6z+ s7vzxvu x)w6, o +bt9p *lwdf0ctmthe 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 at the square's center when a secon z9lzx+ +vtpxu)tb,om wsv7w*fd0c6 6d
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 alwaydf/f+) e) xz9qcxhuf1s consist 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 is )4odz5fo k nv w92yp9xa

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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 e1d 6 la6h. m8tpba:c tyok1x( 0bw:/v2fsufk in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitb:axch.w: kd21la t v6/pmbutey80o(16fkf s ance 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. +g kd(j ;p xzqk-j,sc20t+m cn3z2gikIf the area of the plates is doublimdc jtj0 c2 qggxknsz++32;(pkk-,zed and the distance between the plates 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 capacitoxl- -iy4zn 9jmr 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 difference between the plates amln 9j-yz4xi-s 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 capacitor is weakened, the cm hb7 5opz ;fxw2y)t3iapacitance of that capacitoro yzfxi 5m72wp)3ht;b

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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 a + twums05jn8sre maintained with constant voltage by a batteru n+w t0msjs85y 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 parae vqr ).cfcp :o-*jgm8llel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric fiel v:p8cgero -m q*jcf.)d 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 dielecnjjjiyq7w3is hrbb 78 ; ;nj7-tric material between the plates of a capaciij7s7hribj n w- ;jj7y;bq83 ntor.
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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 b ( a()45g g+twuaurpizetween the plates of a capacitor. W (zaag iup+u4gw)(5trhat 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 paper is placed between the plates of a capacitor0/uj wq*b yb)o holdingwoqjb*b )u y/0 a fixed 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 tybv,- vdp o6kztq31k (o a battery and becomes fully charged. The capacitor is then disconnected, and the separation between th3k- yvb1do6q zkpt( ,ve 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 holdingx nb7 t1so*3:g(mp stp a constant charge causes the energy stored in that7 *sop 3stg1tp( mn:xb 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 capacg z0/x/6)f wco)v 2,pwcjjkoo itor causes the energy stored in that capacitor toc ,6wo/ pkjwz )fjo0c/)2gx vo

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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*,)e +txh /jheqbqp r) charge from point A to point B. What is the potential difference between p, qe q/xeh)*bp +hjrt)oints 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 the p qh*ow*/9j1jfr m- i/w fybn,hc8b s2kotential is -50 V, fwhcmb wqi91h8,2nfs -kjyb j /o/**rto 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 througiig uv- i,c43(lydxczn2 kn,+h an electric potential difference of 500 ,cvg nun i-yz c4li 2d+ixk3(,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 an9ogp m xr5r8s+ electric potential difference of 500 V. What is 9prxgos58 +mrthe 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 12. voy4dfpq +w 5pf62xe00 V. What speed does it acquire+o5y.p24expq 6fvdfw ?

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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. ij6(0(idrxg *z (u*fd2bkg gp0 V do 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)tqvq p1y(5 pjzmvu24 a potential difference of 500 V. What is the velocity of the electron aft51 2qy (vzvjq )pupm4terward?

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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 ln odvq 45xc2,accelerated from rest through a potential difference, and a5c4 ,nlx q2dovfterward 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 potent56wrnkum )u7 jd4t qk o9bfkgj0k/sm t0r,y3;ial difference between two parallel metal plates separated by 1.0 mm. What is the electric field between 6 uyfjk j5;4 ,tnq0 tkruomg7k/3m09bwk)rsdthe 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,tr* l a ope+7oamzq))+yvn8o /m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the poo yzraa8 )etpm nlv*o+7,q+)o tential 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 elecdswu;5 y6ctm-tric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m direcwsc5ym6u ; d-ttly 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 c*yak((ynz 6(6. ucko3a; ixrm6cja m the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic en.6n3ai(*y6 rucyz(kaxcc6m ;j (okmaergy 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 0.2iyj4 b uu(j gl,c57z*uk wcc080 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*70(kc 8zcg,w5ibuju yuc l4j 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, a rsl-hlh(9-hxre connected to a 12-V battery. An electron released from rest at arlhlh9-s- h (x 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 battery. k9v. nwmt2:zz An electron released from rest at a location 0.10 m from the negative plate. Whez t.9v:z w2mknn 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 50gc8yr6ucjj 6a0;9 v w+ .ctusl N/C directed toward the east. If the voltage measured relative to ground at a given pointj+9gv6st;jryw8 a.uc0ul6c c 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 electric field of 50 N/C directed toward the east. If t-ltq1,l rr.r( 6z1r)mg bknathe voltage measured relative to ground at a given point in the field is 80 V, what i.mlr1at r-,qzlbk( n)t6rg r 1s 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 potentie+s zomuc8n;k d 82zq8al difference of 12 V, it will acquire a kinetic energy (in the absence oeukzomnc + 8s8q2;z8 df 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 dista /us; 1tvl(yglnce 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 electrical poten25zed44a1dl.e fc,ijc wf 0bgtial for the center of the dd,5 zf 1fwe4c bi4jle.g20cameter 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) . 3:*py-- oacuh7i:- dh.cwxdw qpagqand a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electricp u3aw-c:p* axhqc7q..dg:o-y d-w ih 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 (3.0 m, 0). If tf57 ej tnzx*ki8l /bo3vd-e (qhe potential is taken to bfv(i53e eb8olk /qn7j- xdz *te 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, 0). If thio ): )wqbrfj*e potential is taken to be zero at infinity, what is the work required to brin*:)qbijfr o w)g 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 +f98znv3xrt d-9:qok h q are placed at the corners of a rectangle of sides a and b. What is the potential at the center qf n:-k xd99vzr3 oht8of the rectangle 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 nvf l+9zqigo: -1p(oxin two diagonally opposite corners. In the other two corners are placed charges p- 1nio:x9g (qfzv+ loof +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 +6f-/mslbo *4yxfxj/w 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 three chargeauk43.f+u *g b 80i egtyfc+l:2*ipm dsd8wfns, each of 2.0 mC, at the corneg0ye cpt :ub+kml*2s i u8*. iffdda8w+f43ngrs 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 th.8n scd9l* gzpe plates of a 2.0-mF capacitor when it is charged to 100 sln9d p.g8*czV?

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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 pl9;xnkdx4 3 e/axnfw;r5 je-e vates 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 15--zqz:j swi (yyvwz with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, what is :y-zvz szi-5w(j 1qwythe 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 plates gx re e xe3cfgfzk(in6 o5 d/;d.z q+g)-lfi4;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 hascmg)p jc)+rvp+c c,.9xg n6my a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, )c96vgp c+xc m. ,p)+ng rmjycwith 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 across a 100-Vg1(iut 3- qmw*f7hf gx battery. After the battery fully chargesihxtf g m-1(gw* uqf37 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 cap-k+uu8-xhw bjdz5w+qacitor. How much energy is stored in tx 8q +- wwuduk5z+-bhjhe 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 in the capac ,s-wv1lqg, qyitor,qq gy -v1,wsl?

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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 f lgd31o0oy/7cw8)gto s-nuy of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capaci)1y ogs/8f30y-nwdug tloo7ctor?

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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 t-02o5z ae zhsfi( *opbhat 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 consists of plates of arw1 zv8l f08n: owlo)ycea $1.5 \times 10^{-4} \; m^{2}$ 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 area e(/-s i2d k0 6us*mxy7neivth$1.5 \times 10^{-4} \; m^{2}$ 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 con zl*y 7n/.grn nct7t5ysists 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 capac7 il u-owq58ixas8)bot vez00 itor 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 capac3:bz3wd r:wcf9 xj8 bzrf*j.mitor is constructed 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-V battery and i:imxf g l9rq.e7oj46 becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space betwee :4xr ie9oim.7flg q6jn 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 bavtwwc+,z 83 sli 4jut2ttery and becomes fully charged. The battery is removed and a slab of dielectric that compw4s uwlt 2 ct3,+vi8jzletely 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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