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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 vector?kclg, 4a.pm5a

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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 isc 7wxf 4hv36b;/ vjxu:3zwxoek s/4 n*shhig6 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 objects9ht, n -asm), tun,br7sng/vn are insulated from their surroundings. Object A has a net charge of excess electrons. vb7,)rt 9u hasnn,/g-t n,mnsObject 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- ms(2suf yescvj+ +f, 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 the electric fieldm 2-vqm j/hgd:

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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 conductingsqnwwa-qb +r-) q.fc7 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 5z /5nvbedkp3)sv6rtc3) +rlc 00 V potential difference. If the potential difference is changed to 2/5 3crd 3cv) szn+ pbetl)rv6k000 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 same poted88wmrx+i8 sw ntial 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 tosepvir8 u* /gt*.:z6in; b udc point B along an equipotential surface.vidcs*6./ in;*r tuubg e:8zp

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surf(2z :ho p6emev u,7vjrace 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 1e qn1 gj pfwm0- l0r99ohxau.a particle carrying a charge equal to that on the electron as a result of 0 oqme g9p91 0rhljuf ax.wn-1moving through 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 ofzs0 oow3r -4p-18wc g.(xv lygm ,joex

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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 toa7;i5jq:,jb*imqb z n

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potentia6:sq4:g( wiku mnh0 gal at a distance of 2.0 m from a positive point charge is 100 V. m6w g0:hqkgni4 au s:(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 distance:) ym mw0c2sde of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the same point chargec) m2ewy0s:m d?

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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 cha8dwugr pzs)d/2do3* pc0an m /rge of +Q is located atp8/o0rg)pc*du d2/nwas zdm 3 one 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 sqf9ao0y0:ngr wtiq0 z** 6b x.sfrrle.uare is 3.0 V when a charge of +Q is located at one of the square's corners. ftl0b 0r0f: a *6r.nzyosxr gei*qw.9What 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 of two charges thatzw,rf g4.rm2-t- d bkg 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 mydios 4z.k2o qgl4.4 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.r.c-utf zeeeyj , o8dp y4r)k v*26bt that one has twice the plate area of the other.. 4ov2 b krf6tt -y8y,jeere*zd .u)cp 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 area42b /y 3fuv 7cdly dml8n8owy0 of the plates is doubled and the distance between the plates is halved, what is the new lody 3cny u0l/8f7mv2wydb 48capacitance?

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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 removed. The pll;yvswg 5a+us(g *+x fates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates rxl+* vgu;s(a yfw+5 gsemains 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 beub f y/v.0,vnuiu25u ztween the plates of a given capacitor is weakened, the capac 5 uvy/ui0fvb,u2 nu.zitance 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 c )m(3fwc*ymqm/p t/5gj2djs -plate capacitor are maintained with constant voltage by a battery as they are pulled apar/t 32ywc m cpgj)s(5*qf/mjdmt. 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 co 7rwdg*r. *wgwnstant voltage by a battery as they are pulled apart. What *g 7*.wrdrgwwhappens 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 dielecd 5sa,xon 1r-ftric material between the plates of a capa5ndaxs1o ,-fr citor.
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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 i n(9axdx)s m0is placed between the plates of a capacitor. What happxn0) xsd9ia (mens 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 bu+9msg ns 8le9w;9g5 aiplc 7v4n2stwetween the plates of a capacitor hold m24tgpan5issu9c wge+;8sl97w l9n ving 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 to a battery ao8 v.e b0s 2it -wl;-b(uqrmuv 7pjvp0nd becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored in tle i-07(uj w2quvsbbr;tp8 - v .vmpo0his 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 constan5nmkuq lb-7f 39: iypv tfa*r+t charge causes the energy stored i-p59f+7 vi bknf a*uq:lmy t3rn 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 1javolg s(6k 0capacito gljkv (o01as6r 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 energyvr2q0p 1i ybhqks+1g*+c4u gi to move 10 C of charge from point A to point B. What is the potential difference bevs gp0q+iyc*r h1 42i+ b1qkgutween 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 electdc )3+b wum/iiron from point A, where the potential is -50 V, to poi)+umdi iwcb /3nt 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 (tc o-f8qfs- t44i y 03ai2fmgxetk) vaccelerated through an electric potential difference of 500 V. What is the kinetic a4yt vkf3oiix0tsgc42q)tf mfe8( - - 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 potc;ajo jn:;hc3w )2 ntzential differenc;j )c2w:n;azc nhotj3 e of 500 V. What 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 potentia f1z qa*c3 +ac6z0wrcal difference of 1200 V. What spe q+3ac6 wc1aza0*frcz ed does 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 dmx-jt)q j +m6 )iub+pjo 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 o(if81 +g+g,g zv8jxhs t5cqcdifference of 500 V. What is the velocity cqchtj( ofx ++1v 8gsi85zg,gof the electron 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 charge of 20 mC. The objec xzufm lwb6w5v3 g06ci (:or.et is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. Whatwzlrgow 5f uv0:3 ix.(m6 bce6 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 potentisl3wlohk ib 0: 6xq:cl4i9,2woga (fe al difference between two parallel metal plates separated by 1.0 mm. What is the electric field betwf(,kxoi w0 o :lwac2ellh6 34bgi:s9 qeen 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 directelq jk)8 d(u,qtd parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0 ,l qk (dt)u8qjm?

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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 directed toward //gj x)/ys4yg1qy fmpthe east. If the voltage measured relative to ground at a given point x/ m/4qjygyp)fyg 1 s/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 dire ysow+2dcna4l9 mmn2lx9+ /ac ction of an electric field of magnitude 3.0 V/m. What is the change in kinetic enelm 4xy2 a9 ow2scl+/m9dcnna+ rgy 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 0.20 m+) ha5*smrspbsx r; e6 utu,b+, are connected to a 12-V battery. An electron5xu ssteb+br,u +h6ar)ms*p; 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?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, sep g hsiwsq7:x*gip-4(iarated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negatg sw4q p 7ighi-*i:(sxive 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 batt(it* k/gg *e0sa 0m56bzkmgdyi8a9ygery. 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 fi(tygk0 igm5a y za/sk8gg **9e06bdm rom 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 directedwpa n t90jvp(7 m,kl(k5 (vaoc toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage a0l wk7v(m oa vjcka9 tn5p(p(,t 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 fc:dh 6h3ch pl1g.5r gwield 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 l3h: crh15gp6chgd w .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 potent ammzyyv 32uo)z ;3cczt,m )9tial difference of 12 V, it will acquire a kinetic energy (in the absence of frictiont 29moy3 u)c;)tmzz3,a cm yvz) 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 atoi-t5 ne 1: g4:juyavo 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 ad jhm;m8lc bnr9p,(jr++t -bs meter stick. Find the electrical potential for t r(-s t8n,j+l bbcrhpmdj ;m9+he 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 i1tm(pst4) uw.v es :mj*r /6arx b *g6ptzea2gs at (3.0 m, 0). If the potentz:4(*mpmwej).u6/ t rspvgt*6sag1r2ta bex ial is taken 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) an5 psz*+ bbztc*oq95gld a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is thps+*zc zblq*9bt5 5oge 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 agpo 6uiz 1-l2st (0, 0) and a -2.0-nC charge 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 point (0, 4.0 z 2s1l-i6pguo 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 plac1md;jbt/)xytlh c+ 6pt ps3 u ted:(fh n1(c8wed at the corners of a rectangle of sides a ( nptewutmfd :c61)yhcs (p thd3x/;tb1+lj8 and b. What is 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. Charges of +4.0 mC are placed in tzzfmkk 1owno :crfu*:.4 af9n- +z8t uwo diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absol9k8 :uzz4ozmo- * f: f +ac1rkfuwtn.nute 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 (cha74:u*s6t qdjzwv mt.g rge +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 chxorwl 7*nhg 23arges, each of 2.0 mC, at the cornerglo7h 32rw xn*s 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 ,;glf;nihc) xe plates of a 2.0-mF capacitor when it is charged to 100xn ;,h)cgf;l i 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 platep1a yk97(ypbe*doa v 6s 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 plate pae g:w+tpf-9s are separated by 0.050 mm. If the capacitance is 179e +gapft-:wp.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 px3aqx4e:y+asjnj;e8 1, yxshbs 3o-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 capacitord(p0c0u5:7mzn zz y jt has a plate separation of 5.0 cm. If the potential differend5m0tczpz jz:y7 nu (0ce 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. Aft6 aikmes )hfn k+z+g3fnj .j59er the battery fully charges the capacitor, the capacitor is immersed j kig+f9 3s6mf. )jhannek5z+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 place e;bitjv/6n 5(whn5 j :jksdg0d on a 15 mF capacitor. How much energy is stored in the capvw5jj jn:kis;n0t(eg/h65d bacitor?

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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 energ0enizo7g o1.q y stored in the capacitoo.ziq g0e1n 7or?

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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 theok6br- a4k*orqp8q) x plates of a capacitor when it is connected to a 12.0-V battery. How much work q-kxp6r4 *8qr a b)ookwas 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 th6pf6s (hpoez ix4n/(3s0;h4pz fdt tga 7tl4d at 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 platlc55g5c r:andzua /*0xa id 4jes 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 plak kwbt,* n21f 7tvh;gptes 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 cap wt iab3j3l* b8k3qjmj5+kca5acitor 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 cons3vdohqayrk7py cxw jg) 8 5 :6/yith26tructed 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 capacit:3z zfcvw.k lq.x7jt n oj8l(q 8:npc;or 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 ae 0eprenp87u5y ,xr,q nd becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the platre7eqr ,ep5x,py 0 8nues 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 battery and becomes fully char( xe1 *6oj zyi)msy-9( wqp+d o4mgfacged. The battery is removed and a slab of dielectg mway(1c6o*o+4 jem-i yxzf9sd qp()ric 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 inserted?

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