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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;gze -i76 x5d2ymwcx k 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 is /irkk./ixeq3hvc2 ur6.q6x p 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 frr7cb x x3cu/,ibdulz */.;bchom their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object;dr cubb*7z/,ihcxulx c3b/. 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 electrwu*-1a/ kfnh77rv6ag6xb ylx m s7b;dic 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 dic-ibyi8 g0at+ rection 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 conduws8g2y* .gwtu / +ihjycting 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 to a speed v by a 500 V potent-5yd/vzer(/o5cvr z tial difference. If the z/ z cdr/5 et5v(orvy-potential 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 samq9 (7kph5jkmi e 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 truuu + na7.u:rq0omrol,5 p4no point B along an equipotential surfacpo nmr7ou+r,u. ua4:nu50 qrl 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 bswvl szwu87 +,e

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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 o )xyqz) f9 atkd.zuz r/cig75:.y0g nen the electron as a result of moving through a potential difference of one volt is refer)k9deqy5xzgf0tr z) uc i7/ya. zg.n:red 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 ispsdike ox. g.slu+jzh/* )k 09 a 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 coriz2uil 49wu ,dresponds 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 distanx8x;yuj 8ii fyrq i**k hi-g(7ce of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point q 8f(;hyxig*kyi 7 xi-uri8*j 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 x0z2b okt/l7qat a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 0qz k/btx7o2l4.0 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 sqn.hbd6is+-obaa g8e()n .kr i uare is 3.0 V when a charge of +Q is located at 6e.)8rgaa kn n s-bi i+.(bohdone of the square's corners. What is the 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 center of a square r as(96(zmz:)k kyk ,,rq3 qtex+hdpd is 3.0 V when a charge of +Q is located at one of e+3r:m a (dy qxdqz)k k9 pz,,6s(ktrhthe 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 consis xam,cxe9ztduvh9 7w+uba t. a7 z7kf0 o-)6ykt 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 i(2xxq zevf,14(wq23c2 vwyo x7t lh qcs 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 respect except that one hn1dv mxy4)l)mas twice the plate area of the other. If the smaller xm4l)ym) n d1vcapacitor 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 thd 4gxk nvxp93)e area of the plates is doubled and the distance between the plates is halved, whapxnkv4 xg )39dt 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 remove61bm :tegeq 8wd. The plates are immediately pulled apbtg6w18 e: mqeart. (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 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, thi5 3 8w6f7;pfforfukfe capaci3up7 ffff 8 f5iwo6kr;tance 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 capacit3ohwr2 9n9jtfx.igc2 or are maintained with constant voltage by a battery as they are pulled apart. During this ph3i9ftnrg2 .9xw jo2 crocess, 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 tz k +xpk3bh i/qxgp )6bb9*j0constant voltage by a batb/hq6g j3ibpx +xb p0zk9t*k)tery 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 addingkubv.l z/d0,-wair x7 aj*/rw a dielectric material between the plates of a capac0akx-iujbw r. rwvd7 l*//az,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 between tm;1 zsntvow-twdv,3w nsh.*w0a3z, x he plates of a capacitor. What happensv. d m* at 0w,,wx3-nwnovst 3;wz1hzs 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 capao-z8jihnb ll7t h/1(tcitor holding a fixed charge. What happens to the electric fil ztjl71oin(b th/h- 8eld 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 98 sxi5f lnh09cx5inyto a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is incr9i55hin9c 8 0xysflnxeased 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 holdinp.0opji.k4y i g a constant charge causes the energy stored in that capacitor tyko . 40ppii.jo

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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 t* 1o.rg1x9dl gs dvu6that capa gx96 vd*1ulos.tg1dr citor 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;phh ;vrz dogm7i :wox.n+1a- point A to point B. What is the potential differencehigvx1am hzd.o -:7r;+op w;n 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 the potential is -e,kf.m) gm oq:tco:b+ 50 V, to point B, where ck,:gq f:.eob )mmot+ 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 accelerateqb9*3a mj 3ydkd through an electric potential difference of 500 V. What is the kinetic energy of the pd m a3jk93byq*roton?

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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 kjjnq5gb(m, ;potential difference of 500 V. Wh;jgnqj 5bm, k(at is the 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 1200 a9 hu5+ dh7un of-p)xuy2m(yf V. What speed does it a-(fu 2ua hhyu5 y)n+odmpx7f 9cquire?

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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 Vjcyh; 049 dera n*fz5n 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 a poc( 0s(*jslmcal;awi dy: 6w;iaf ;5qbtential difference of 500 V. What is the velocity of the electron afterw l m ;0l(6awwssi5cfbi;:y;aq jcd(a* ard?

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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 charge9kfg+fwrcu 0e5c /3t7 iq9oq p of 20 mC. The object is accelerated from rest th u/ko7395qffw09pcqitr gc+erough a potential 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 the electr1 5gzm, sno;x:;fmbc gplmz8)ical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field bengbczs;xfg,1 m8pm );l om5z :tween 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, sx4dxfo 0+yxpt;b0 n9with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the x+ot ;4x9pnxsf0dyb 0potential 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 dirp9vhh2lj f2 iza1,:gj a4s8 tnected toward the east. If the voltage measured relative to ground at a given point is 80 z21p fnv :9lj4ha8,sht j 2agiV, 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 fy8ovo 4th lg++ield of magnitude 3.0 V/m. What is 4vytgo +l8h o+the change in kinetic 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, egb(y ;n)ze.1nncpp.separated by 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 electron arrives at a distance 1.50 m from the positive plate, what is the potential difference between the initial and final points?)( b;nyne.p gzc1ep n.

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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 conmp4f7(be3z p6f 8wpeq nected 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 pwf 3pq 7bpm6peef z8(4late, 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, se znde6xr8 8af7 ,nf:nk3c e5)fgyj.lsparated by 0.20 m, are connected to a 12-V battery. An electron released from res)nx8s5e.l f r:yae zfc 673kfj8d ngn,t 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 ;:j2nm/s jwmiN/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, ws2jnwi ;/m m:jhat 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 fufou-egnn3-2(us 73sz o /wfdield of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point n -7w-nu u eo3f(ogsfsud/3z 2in 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 throul.ye;7szp 4 dygh a potential difference of 12 V, it will acquire a kinetic energy (in the absencyel p;z4.7 ydse 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 dista/z tk5,:xejp ynce 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 potenhapng n.ys* :zlhe+k1;5z;x o tial for the center of the meter hxzz;:.nyo5ale*; hgkp1 ns+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 p t+e9ucm/d nc5otential is taken to d/+m5 cu9ectn be 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 (0, 0) and a -2.0-nC charge is at (3.0 m, 0)4 a; h)df8c:qhv,yd xm)ydoi/ . If the potential is taken to be zero at infinity, whatiy:/hdo4x )a ;vcm, q hd8d)yf 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 the p4sa/)p( -/ocycdgu vev ss) *aotential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infi/ * dsssoegaa( vpcc-vuy)4/)nity 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 2meu;sh;tzufnv/v6lo p)4q.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 = 3.0 cm, vluz pmh64tu ne;;.)/ vq o2fsand 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:..9j dx-rp(smbonzky gfg7* mC are placed in two diagonally opposite corners. In the other two corners arekrjy: db- .*n9 pfz(sg.gm7xo 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 (charge +2e, ma:)pbdcuwa -zv5x5 jr *ss $6.64 \times 10^{-27} \; kg$) 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 charges, each of 2.0 mC, at the c8)cpyvr xfhc/1 /a+xgorners of an equilateral triangle of sidefr8x/1xhc/p )a vgc +y 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 /qee 8 anh ypj 9(1.kg-sj7bqicapacitor when it is charged to 10/s ehpq8yn.i1 k aq-e7g b(9jj0 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 has plates of sbtm*+ 30.vunhe) r.lq idz g4area $0.50 \; m^{2}$ 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, and the plates are0kebr r +k/4+cysdv9u separated by 0.050 m+rs k ky/re0 v49+cdubm. If the capacitance is 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 hast) i ddjsxeij-ctq5ye)o em9q d9wu-g) l+ 40( 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 separation of 5.0y oay,*4/y 3kl6 zynbe cm. If the potential d e3k*/yyyz4, ayn6b loifference between 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 connected across a 100-V battery. Afmz9 f+klk(.u*x4h h hpter the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = .fhkxh9m4 zk +*luph(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 onwj2 ;fvx( d htq ;j6m.t3c/eei a 15 mF capacitor. How much energy is stored in the capacitohewfj 6m dtq.(x 3e/;t;ivcj 2r?

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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 storv ll-wee6hmo.o+ h 4 05pz rnq3t4*qj5-fz qkjed in the capaci-j+onhr3pmf5qqq* v jel6 kl4 5eht-z4o z .w0tor?

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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 n6h hnvd+ugmpcr d-;2 0 g)7cyplates of a capacitor when it is connected to a 12.0-V battery. How much work was done in chargin p)+2nu-g6 dc0m7dgcrv;hy hng 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 thath+ g,w6c: pffw 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 capk*tmz7af 3 2r1 vr*nmh;)xwqwo1p* pxacitor 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 consists of7j v 5n2kke4or 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 consist)j6fg j 9z q 9pqj*qq,yxx(kc7s 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 constructed /wd8z (c76c ewa)v /pipzzrxjvl 9 90wwith 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-znr,j fnn4*a dgd-l(i 2z7qb ea 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 50c.w 2 sjbc.-ke6w.lahjya8 r/-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the h 8.wc2sc.j .rbjl 6wa k/y-easpace 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 conne gl7lj+:x3ivm cted 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 the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is insertedlm 3i+jg7x:lv ?

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