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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 iu ; svlf3h8(*- dmkezes 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 coulomjs1*k; yevk4kv zs*2v b 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 from their surroundinsw ;x9rr(t2qoeomc* 4gs. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higmqe xt9s2 wo;(* rcro4her 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 el( v;j5c8zw oyhectric 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 electl(8udn 3 / hqb)tknl2zric 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 sp-a , m:bnqa84tk3uxz rty 2n(zhere. 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 .raj+ toiw*d8 sxo03pa speed v by a 500 V potential difference. If the potential differencat0or8d.wis o* 3pj+xe 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 tnmsm,58 ypu6 5mzwbn0b,jex 9he 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 moezjevcg9ae9o. m, 1h-ved from point A to point B along an equipotential surfacee1 e- cez. a,ovjghm99.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface l(1c l.hbiqt3must 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 cajn 5nk+..q nwjkd 7c6nrrying a charge equal to that on the electron as a result of moving through a potentjnck d.wnkn76q+j n5. ial 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 ums8+bcfhl: f(ne x7 aisrmb. j.w ):-wnit 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 cor8y:0 zu gnv(koresponds 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 of 2.0 m from a p whzchak5qn0 o 8.-r kf//vng,:a :vdrositive point charge is 100 dwo 5 8gn fvhkqv -hrk/.0:/zna a:cr,V. What is the 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 distanc fj ng/ad-/wh/va/0e, x p7ywce of 2.0 m from a negative point charge is -100 V. What is the absolute potentiaxnd we/yac/vag -f7/ h,/pwj 0l 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 a sj. wctrzx1 /w87r1 ercharge 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 other cornerc1w71wrz/ sjr.x r 8ets 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 7itfkk ,7hrfd um5p- qzz1q07 a charge of +Q is located h7m0f1qfidu7 5rt -p qz,zkk7at one of the 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 consist w.h 3 et)un:)(voib bkof 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 fp9-evi 6lz)bis 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 identw m2* x)cr/huru1ff u:ical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capac *f hu:r1 )w2fxc/uumritance 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 has6/:n( oyp mwh(ia8pdy a capacitance of C. If the area of the plates is doubled and the distance between the plates pn(o 8 6a(yihwm/py:d 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 capacitor fully and then is repft18( 0 dqjs .ecc3rtmoved. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge ed10 .83 jc spt(ctfrqon 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 platcwu z*x0fmv9t/6k2 oees of a given capacitor is weakened, the cap o9k2t6w/cxumvzf* e0 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-platctom-8- yorgk 5m u,m3e capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, toy-g 5m ,u3 -rmkmcto8he 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 constant v yjfm ah0i l//qn*a;yn9:wk0 moltage by a battery as they are pulled apart. What happ wqhn/f0a0k ;m 9 y*y:l/iajnmens 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 of ,gyn nt1ku)e6 a capacitor6e nnugkt,1) y.
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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 bet 3:rqsxisj3e1 vhjk2.ween the plates of a capacitor. What happe 3k r:ji sqhx32je.vs1ns 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 capadfg 1sybubn-in. s zlg)rm5df2)8h.( citor holding a fixed charge. What happens to the hfz. d1)frs )(ds 52m8linynubg gb.-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 to a battery and becomes fully chpoq 1 f*j 1kwrx(4cmwysk j452arged. The capacitor is then disconnected, and the separation betwwykw1r1*5m4o js pqj(kc2x f4een 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 ca0 gwccc/d)pc8uses the energy c8p) /cd0cwc gstored 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 zmjfbe6ab 3*ma*ul -e-k;he0 a given capacitor causes the energy stored in that capacito36-ez m ja- ake0*uf*; lhbembr 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 point A to point s8lnl+av . b1xkkw8)ta723xts vlp+ wB. What is the potential differencebt12w8 8wxkkvl +37.+) xs p avlsanlt 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 97pdcfw sw3c+1 a+v rkan electron from point A, where the potential is -50 V, to point B, where the potential is +50 V, i7sfa 9k3 +1wwp cvrc+ds

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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 acceler:en0wlu k;pd :ated through an electric potential difference of 500 V. What0knwe u ;:lp:d 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 an elect e1c 7uarak5o0ric potential difference of 500 V. What ieau7 o krc501as 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 V 0nd kf8 r-q/jkn2xecf.8ax4nv,3ae s. What speed dokn 4af 8a2vnns efqd x3e,.8 cjkr0/x-es it acquire?

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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 d q29jc96uvoye o 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 o(au z. gg0 qy0b:qz9a7kz th)lf 500 V. What is the velocity of the hazz:q7 0gz)b t (09ykq.luagelectron 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 cy: u7h./d 2jfixu56 lblqmj1j harge of 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the po/1 ilx.djfl q:hu b52umj 6y7jtential 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 difference betwe:1 (jam0q*( ep+itnxzauma4q en two parallel metal plates separated by 1.0 mm. What is the electric f:*e qj(pt4a 0zami1 x(+ nauqmield 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, is di lno+de8;9dcicsnfz p )2vz+l1o9m 9 xrected parallel to the +x axis. If the pot+clzzfd 19 ;co o9) e pdlv2ns9+mxin8ential at x = 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 )po1x-pagy .h ts8w 5wfield 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 pw-pxgyo15h 8aw.p t)s oint 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 alofiy) 5mv*pdl; i8c l qoab.6p(m7ih8wng the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the prp qllwp d b68;* 7 h5yfimi.io(va)mc8oton?

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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-u : bqdun.oy* connected to a 12-V battery. An electron released from r *.-:o dunybuqest 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?

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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 conn.r i gt,-.iep7hs 9t:j; gfzh7rc( tvfected 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 does the electrontisvz( .p79e.tfj: -g h grf i,r7t;ch 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 connectxv om ,8w0)cjm g9mia8ed to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrimgwvjci ,8m09 8ma)xo ves 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 the u)-h3roq28hxg rp :i xr8jj 4))xstml east. If the voltage measured relative to grou8iq:2hs)l xro)mxx-g t8 3up )jhjr4rnd 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 electric field of 50 N/rm .o *//iatglC 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 1.0t / imglr/.o*a 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 differeu pfzd28yr( c7nce of 12 V, it will acquire a kinetic energy (in the absence of ffu c8dry(z 72priction) 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 am* / 9gzzrmz;m( rv5drt 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.e (r3q/kuy1v dp 2ger8 Find the electrical potential for t(3d qvpke2grr 18uy /ehe 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 -2.0-nC charge is at (3.0 m, 0). I fovup mt i+r768+h 2nby7v(zr5: otxzf the potential is takruyvb 27ohomx7zit ztf(v : 5n6r8++ pen to 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 chs z fw.cv. d;8:bbmh:parge is at (3.0 m, 0). If the potential is taken to be zero at in:.8v wdsbz. ;mcpbh:f finity, 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 chg . ull4ucwyu2n1/;cparge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to pointucplw u.u l/1yngc42; (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 equa8f3prwhq z6 vay)lze2.q(.; qeu g,n cl charge +q are placed at the corners of a rectangle of sides a and b. What i6n a)8zghlz2(rpq,e. weqc f.vq ;3yu s the potential at the center of 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. C8du gs x;ow1o2u09fg c8qbyb2harges of +4.0 mC are placed in two diagonally opposite corners. xso1 c90ug2o88qbu ;y2df bwgIn 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 (charge +2e, mas7qyxk/o*2l yxhu; 3mds $6.64 \times 10^{-27} \; kg$) 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 gm3wo,w6eqm,mC, at the corners of an equilateramwoqe6w , ,m3gl 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 t gkh9i hz *w5*+yadzv:he plates of a 2.0-mF capacitor when it is charged to 10za hkh :*y+v5wz9d *ig0 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 plateu /gn7(qwo7q pcp3b6ns 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 with air, and the plates are sep2mm 8w*5ixi omarated by 0.050 mm. If the capa mi 8mxm5iw*2ocitance 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 has plates ofa(z 1.-,m y riebv y:kx0u,fsqb.bce( 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 5.0 cm. If the sgm50 wrbzf0x ) ip2z0potential difference betwe0p0fz)0gr 52sm w izxben 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. After the fak6bs80 ;oc gbattery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge f0k 8;fbog ac6slows 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 storedt3 3b )tq,q9ug: pdfjd in the capacitor?gj9p )d qq,u3d3f:b tt

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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 t*ckv))ok*. fkpuiev z g()8azhe energy stored in the capacitorczkzao*pef8)( ui gkk v)) .v*?

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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 fs ;lhe qm9l)yo:*pq(kvlbo 9 -lows onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capaclo)byskq9e lm:-v p *h;9( olqitor?

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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 wb)x rmsa* 1c0so that 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 -:r2ti wc 3v/qc- yswqplates 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 consif+x;e x 8/owfksts 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 capacea7mq t4( (h9u0mzfqb iv9o:q itor 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 constructed with6k86 puoha7 ze 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 pe.2a2 vpv u3rp (i8r7oztqhdys q( e,7late 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 becomes ;ep 8sn7ayty+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, pet8 +;syany7what 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 battery and becomes fu+(udizgrpna3(ufu o qv 62 ;j,lly charged. The battery is removed and a slab of dielectric tivzgu(6 po3q (;+2r djufnu, ahat 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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