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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 is1n ejc-s+a w(k 8j0lay 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 adov lzg f8mf0, wn oh*tc1)j;d;n2j0z

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum o: 5etf r7pqp9mpn2d/u bjects are insulated from their surroundings. Object A has a net charge of excess electronp:r92ntu pmp e/7qfd5 s. 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 direc. u9-3uufevq jtion 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 opposidb(270 nly6 utux:q ja91p thbte 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 sphdxyv, ro*1gy(vwa0jap;ew k2)f.4 m ji1)b y were. 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 +93cgfjxe 3vn a(wy0 +ggv2iav by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ball be?+yx n3(g+egc0 9gafw2v vj3ai

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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 is refe9 i*3vasogn3 r.ft 0 j5g8ftsirred 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 mrpm4di e1*7al8-j2gl mw;mo h4i p)re oved from point A to point B along an equipotential surfacew8*d-pp )llo471eg mim ri ;ej2 hrma4.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfbajb5y8d. kbc .8n- epace 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 on the w ; v0lsj9)syn urj6t7electron as a result of moving t0yuj ) r;jntl s7s69wvhrough 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 o5d0jints cv 0/f

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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 v-npg( kh o zn*nl3:vy:+mtr( 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 positive point l y3 n+:senw ar00e/0lctd .pgcharge is 100 V. What idtann s er30ygp cw+/.0l:l0es 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 distance of 2.0 m from a negative point charvub,nm+ir97/ sflz 2*v2yper ge is -100 V. What is the absolute potential 4.0 m away from the same point charge?*s zuf9r27rv,nb+ /pmevyil2

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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 ofl 5.uf6( bxsun 2zw8daf gy,8c 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 squaru,y682f.bn ( dzlfwsc58xuga e'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 s.gxbfxxc z( 6n+bvfh +c)8n3is 3.0 V when a charge of +Q is located at one ocnfh8xbvfg3+zxbx.s+) (nc 6f 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 consiq9ow5 gh9+dlf ;/5feg yzn.5+ icgzwcst 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 ascl.ie*xzf :;

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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 hayj i k5xg rm2hxz4p digc hs/j10)-45is twice the plate area of the other. If the smaller ca 4c 5mxsyh)0pkgj5rij-hg142 i i zd/xpacitor 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 capacitaebn 7.ui8ni9)t(gjxlp r 2s:cnce of C. If the area of the plates is doubled and the digj x(7ut8 lin:.ice) nr b2ps9stance 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 capacitor fully and then is remove).gmj o8iyo.19ufwq c 9sf f 6/lmbe9ed. The plates are immediately pulled apart. (With th s/ 9fie o 9m86w 1bf9cgeml)jyqofu..e 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 w5jwh17n8 cw pp(j y5dleakened, the cnph 1 7y8wc5(5 ljjdpwapacitance 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 constant vwfooe i 2al;8ym/i,wv e7(7o toltage by a battery as they are pulled iy ;w/iowfovle7m(a,2o t e 78apart. 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 parallel-plate capacitor are maintained with constant v vqswtjcx /*;i o*0u9i6pee* loltage by a battery as they are pulled apart. What haolu**9 vje/;pexsi0tw6 ciq * ppens 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 t (m/0/ywpvu/stz tr4ehe plates of a capacimz ev/s (r4p/t0ytwu /tor.
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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)rhouelzh ;ef97l v7ysh-u7 : capacitor. What happens to the cyl h-h7v;r7 ):u leouf7 ehs9zapacitance?

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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 ibm md:ox2gq : 47gv rlqh60w1u6 f*nxls placed between the plates of a capacitor holding a fixed charge. What happens to the efol: m b h4*x xwdqv66uqgr7ml0n :g12lectric 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 fui00 te9wjicr )el,xbw3f2: dilly charged. The capacitor is then disconnected, and the separation wr: ,0ibxdljfte 02w) ci93eibetween 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 consal5bz sdyx )1wzp;t 7+tant charge causes the energy 1)pwz; sa b7yt+xlz5dstored 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 given capacitor causes the energy stored in that 8x6w rnk-7n boksubg+0b3 q v3m+ax rp;al/x9capacitor to9s3 kgrx/a+b ob8nnuwm6kl vx 0+- 7;rqab3xp

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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 energ55 zma oln tgyz,x 8t4;9n(lnty to move 10 C of charge from point A to point B. What is t ,znl tyonzt ag4t;5x85l nm(9he potential difference 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 A8 v;vk exb1rz/fda(;l :cn7f0df6isd, where the potential is -50 V, to1cldzvvs f x;n07/ b:dr 8(;efdikaf6 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 accelerated4g - r z*qmzcm*l:,rov through an electric potential difference of 500 V. Wha,r4l z :mq-zcmor**gvt 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 electric potenti4a wgi s5e:;yn q.tdx1al difference of 500 V. Whiwsyt1xng: 5.e; dqa4 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 th(qk vwhr2gonylv:mphs6 +8gixf9 .:5rough a potential difference of 1200 V. What speed does it acquirr.sox:h 9vi lhwg+g v(2f6: q5n8 pmyke?

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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 +lyol3kd0r( q 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 cns*;; hj )utidifference of 500 V. What is the velocity of the electron afterwa h;t;un j)ic*srd?

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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 auz 9r1un 9aq5lccelerated from rest through a pnr15uql 9uza9otential 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 electric/(nuu f0r mrf1al potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the mr ruunf0f(1/ 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 dilgv b92)r0e )sf;i mxfrected parallel to the +x axis. If the p);efi vs f0xg9)mbr2 lotential 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 field of 503j,3q kuvi* 24 xoqzvt N/C directed toward the east. If the voltage measured relative to grok3zu *o xt42q ,vivj3qund 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 ykr/ c1sfo4q/o,x+m i along the direction of an electric field of magnitude 3.0 Vyx/mik 4q rs,/o +fc1o/m. What is 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, separamh5vd0q:nrk vy56 . 5vaavw62nub5dkted 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 distav .m66rb5d dhk5a5wvnvvany 05qku: 2nce 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 y kf3+*r htuhkg 0ts4 ;fnc3k+connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron ag3hrs0fk+u kk 4;t*ntfhy c3+rrives 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. xqa ffj7wbt3 m/je22zt c8r(plrt1)p -q;j-p An electron released frxfzptb8 qr lt2m7 ;w/ r(jjpaqtje3-1 f2p) -com 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 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 eastbc74lceg)cme cs b;/utt 2/ ;t. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.074bcu/e;ccl)sg2m e;ttt/c b 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 directjpw adreg 60e/6k; hq4ed toward the east. If the voltage measured relative to ground at a given g4hewd6rj;e6q kp/ a0 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 potential differen vvpzh;*b5m(s n(4xq a0+s kynce of 12 V, it will acquire a kinetic ens(5sqpm k(4*;zvvn hnxa+y b0ergy (in the absence 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 distu :c1l (/ pfr.(fipzljo+/ +)dyij)mvnohwg ) ance 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 4qhap p c(p s9 jp+0t-gz7bxb.of a meter stick. Find the electrical potenti+tzpgx .0(a s9jhbp-pc q4pb7al for 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 -2:( tjm5o-qqgr3ibob (.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at po(oo(gj3m- 5tqqi: rbb int (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 the uab c,a.+d410snrax lpotential is taken to be zero at infinity, what is the electric potential energy of a 1.x+aabs,cl1ru4dn . 0a0-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 zkc4js(r:ae .n++zrseyd;g4 m, 0). If the potential is taken to be zero at id jaeyzgs : 4++ rcensr;kz.4(nfinity, 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 corners of a rea19p 8. ( wlpp.mmqwjc3ifxa0 ctangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 p.l(.p03jw9i 81f m qmwpx acacm, 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 keemghbos-*ko/ 7ncq*t.6, iin two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. e-gk7.s/iqh k* omobe *6,nt c 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 +2,0 t;e z:o kw-8egv8ivfhizdautm-14 cq -ce ,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 place three charges, each of 2.0 mC, at the coti5cp xxn28xlk gnm3b;gh64.rne.n4ichl b 5;623nxxktg pg8x mrs 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 the plates of a 2.0-mF capacitor when it di:/22 b5syoxwp e okx1g+* wois charged to 100 dwgbo o*wx +1/2io xskyep:25V?

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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 ar.pe44uda 9vqfea $0.50 \; m^{2}$ 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 ab0tw4 rnajk,6re separated by 0.050 mm. If ab6kn 0t,jr4wthe 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 has plates of area 3qukk3fb3bxe96ey8 d $0.20 \; m^{2}$ 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 cmsl9y85dxl4 ezldg/ * m. If the potential difference between the plates is 2000 lglm8 9ldx*ye54s / dzV, 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. Aftelq7/l mq849ajp6lhz)i 5 yrvlr the battery fully chzlh8aq 79 lv6pjm li)/qyl54 rarges 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 aqf8l t, t0dt ;aim1le3 15 mF capacitor. How much energy is stored in the capacito 3a, 1f8i0tq;etd lltmr?

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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 energly7e:q xm (mvl2s0fv32st6wv- tyk+qy stored in the capacitst7 :x63(ll qv mk02 wmf2v vy+qtyes-or?

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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 is connectedz. eotib i:eb1 q80lw2 / fm,lbge5dd: to a 12.0-V batter, bi:ez0b5l2 bdoegt1l ./ wimqfe:8dy. How much 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 it h/g08h rjqti/ 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 capaopr y+u:4+t -kinmx* mcitor 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 of plates of arefcvl .kzhwi t61+mr)7a $1.5 \times 10^{-4} \; m^{2}$ 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 consi+h -o*swm- ihqsts 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 with plate areag;gzo.y iq5v rgp7fjac (.c6, 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 njh/k0(w cmw(x.,zmwconstructed 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 becomes fully charged. c vcmwxp*o ,1w+,zg2k 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 capacitance of the capacitor after the slabwpcm ,g,v*w z+o1k2cx 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 batt 8(fcrkwxku2dv b:9z2 fw**0o0oje sfery 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 dielec9fe u8r dkjo:b wzxf ov(s0k*f2w 0*c2tric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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