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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?9 .2zh,e8s3lrsxgwi d wb.2 pf

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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 i gx49 hnoivrcjc0m5 )9xmi 5.js 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 objects2wtv1+t:m u:p td b )lu,z8bpv are insulated from their surroundings. Object A has a net charge of exceszu2p8 t,t lb:dw+: tbv)vpum1 s electrons. 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 ozu2bgk us(y*j60zie cc3:r:tion 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 d rm axi/3y, 1r11qhkdvsb.xy) irection 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 sphere.b0 b3jsp v,8y1fh nu3x 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 byjorkfyc 9p/46so1x * m a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of the ba6 r psk4xo9cfmy/j1* oll 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 ar- qoyfino e3yeb+2x*1e 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 moved from point A to point byk )mt;l(s 3oB along an equipotential surface.m3y;) b oklst(

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfalf ;h3.v wai+gt0s .sqce 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 thc2f2qjhyy- jjg 13 u/zat on the electron as a result of moving through a potential fqu jjjy1/z2y-c2hg3 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 unitm:(m7s28ly tlk ,4kpimn-/ ts/bhypv 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 corres grm/78anwdx u288 yfh398lkhk :i kxgponds 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 posit i:aob,i+5 u h6*/a k4yrjdrbsive point charge is 100 V. What is the absolute potential 4.0 m away from the same point char6ku/i*o+,abbr :rdi4s j5 ahy ge?

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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 poinl3,qdt hxoim, p354bw; itqi -t charge is -100 V. Whati il3wiht;px,3qq 5,-omdbt 4 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 isfx mi2c(vs :qhbfy:11 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:bh1 cfi(ys12:vxfmq 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 is 3.0 V when a 9qeokcy p y8aks+l 2+*qtjg*9charge of +Q is loksay+c+tj9e829 kq *ly*g poqcated at 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 otngi w;2p bdz(4xk z:fzk848l f 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 i1/hs ybvi7 3bbs 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 identicavz o p)gn-n.1hwszsn 4f(;c3xy ;ghk (l in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one ha( gfgc-zv wsn 3 hxk)(s yzn;n1p4ho;.s 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 capa4j-o6ut y3 4l gpxycd3r 6,bdgcitance of C. If the area of the plates is doubled and the distance be u3-rgpdb6gdo44,xjtl36y y ctween 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 tgk31uyal.py 2hen 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 as they are being separated?23yu k gap1yl.

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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 gh fs2pu/ *il: lurs96diven capacitor is weakened, the capacitance o:l u6/sl2 idh9*ufpsrf 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 co9ot9ngz ),1 dnibf3 mgnstant voltage by a battery as they are pulled apart. During this process, tzb1)n o mi9,g3dtgnf9he 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 parallel2b3y gg vz9,ov)sjx3 v-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the9x g, v)2vj3 vzbosg3y 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 add j(rh6b2f+heb ,xqvp5ing a dielectric material between the plates of a capa +fhxeh2bq5 b(p6,jr vcitor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material sucn p+ uk4c wtg90xng,r(h as paper is placed between the plates of a capacitor. W4(0ru9 ktn+,wn c ggpxhat 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 awl2 fi jbb3e 7e90/+bz nguxl)s paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between the pl+fz0 7uee2xwbj) i bl3/b9g nlates?

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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 ./ 83yxusc1 gb.cuvd( ysm e0hbattery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way e x(sy sv0g1cbc/ h.8u.ydm3uthat 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 cx7slgt p1cv*3lo1u ziet8 3p4onstant charge causes the energy stored in that capacitor1slv g4tc*3pp1 uxte8o7 3liz 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 aj);rsxms+ o:xq g)hz0)r gco ( given capacitor causes the energy stored in that capacjx)+gc(sr0o; qr: x)goh )smzitor 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 f 134z6pqpr bemove 10 C of charge from point A to point B. What is the potential difference between points A e r3bp61fqz4pand 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 e7i;b(.viol(yyy ip+u+b 1lze lectron from point A, where the potential is -50 V, to point B, where (1yiyi(v7ebbp;o.+l y u l+zithe 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 accel -*lgzyu4 h:y9c1brzrerated through an electric potential difference of 50yh u*-c1rlgz4byrz:9 0 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 an electric potent0xt+oh(a( gg zial difference of 500 V. What is the speed of the protg(tgx(zo+ah0 on?

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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 provx4z v)(9bczstx /5 rrvk6+m vtq+m ;wlc,8jqton falls through a potential difference of 1200 V. What speed does it acquire4czktv,rz9(j mx vbq+5 rq 6lxvsv8;w)c/mt+?

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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 gtrel 4kpejg .i 139)cV 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 potentipz/0ivofkj5:4ubpe; al difference of 500 V. What is the velocity offj 4po0uvkbiez5/p:; 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 ajp1uiki/ uln/5)t 3t)2ua sah charge 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 3lpuk /t /))uini5s12jut a haof 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 -94( sd ljexwp sumrnm q3v 8t4e6a;9welectrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the platn9 m v9 4w;(4aewemrp 8dsxj-slt63u qes?

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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, isr9ik/ g9pq- b7j*p) bhvdep( s directed parallel to the +x axis. If the potential sqp9 (bjbi*hk 7/ vd)pgp9er-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 50 N/C directed toward the easbxg-buc6v v6t 7 rtwe:ld.h5,52jj i qt. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a point 1.0 m directly westrg5.h tl,i2b 6 7j uxb-ec:q65jwdvvt 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 field of magnitu1;rpaw l,s7qy5p.ny mde 3.0 V/m. What is the change in kinetic energy of the pr5.;na1mw,p7yr ylps qoton?

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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 connected to a 12-V batt7kaa+dt fs7(r- sva,)3pklc: v xo8u bery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance kdap o3s:-tsr7v +vbc 7u8l)aak(,xf1.50 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 connected toq8 di2 q*fga5y a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. W f2q gd*qy5i8ahen 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 t 3wlju 6k vhl+mrbd7..akh9yi2k/k a)o 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 plat dyklv6l)hak9m.kiabwk2 7 r3/+ujh .e, 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 east. If the vols10 skub::pp1w (h-i+t b5g,tsehii ltage measuredw-lt,ib+etss(gsip0 5hh1ikp u :b:1 relative to ground 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/C dirj1gpafa;t 0 8tected toward the east. If the voltage measured relative t0 f aa;1tjgtp8o ground at a given 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 potentisbom f,5w fq,8d 4eew1he0/qial difference of 12 V, it will acquire a kinetic energy (in the absence of friceeq4 w08oiq,f/be 51 fwmdhs,tion) 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 distance o qk3k/l+ m1iqt ydmu;-f $5.0 \times 10^{-10} \; m$ 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 meter87g u(px e0j2h kt2kqa stick. Find the electrical potential for the center oeg8xjtu 2q0pk2a 7 k(hf 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) s*8c. qh2xnfuand a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0, 4. xq 8u.hs2fc*n0 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). r juqr/4.,ldoIf the potential is taken to be zero at infinity, what is the elerloq /4ru.dj,ctric 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 -f qc3c:10otgo2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is c 3ft0o:goq1 cthe 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 rectangle oz ;,5hsju rx6,-hfnzef sides a and b. What is the potential at the center of6 sz,;nje, 5-uzhhxrf 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 0c1w)f/.kgx99hiegqip s 9il f0tp 2oside. Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mCp0.gi2sl1t/h)c9fx9q9f ki wo0 egpi . 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 +2tmz xofzd+k3pja 3f8t swr-l1; 0*ki 7e, 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 ti7i cjwn rh9 fa01( rn8(dwl9corners of an equilateral triangle(j c7d (ilhw90ar nwnf819itr 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 thevp(+bs c3(bw:qtu c/v plates of a 2.0-mF capacitor when it is charged to 100 V?t3(pbq+u (:c vbvw sc/

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitfjuy/nh m79ey. rh: kf(ru9o(or has plates 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 withty zvs7 04r:sq air, and the plates are separated by 0.050 mm. If the s:rsy q47zt0vcapacitance 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 o;yun 7orbk.vre(qq 0-f 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 potential d- 3obgkgeeqv)4 n vyyf-2s c)ok2qr/ -is nb 2 y3c kqy/2-orkq4o evg-f)v-)gefference 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 acrosy+s( 8jkzam4v6x :omy8; pnb rs a 100-V battery. After the battery fully charges the cax nm6vjr+ba (o8 ;yy4pzs:km8 pacitor, 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 osdvo5/f fe k/r18 dx n6ki/zc)n a 15 mF capacitor. How much energy is stored in the capacie/1viz5f c6dx )n/dorkk/f8 stor?

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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 6qmkhs;s( a x6d rzfq:,lf70 hcapac :r7z0fm s6(ls; dfaxq,qkh6hitor?

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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 connecte4q 5p tjz5rs.dj4vs q7d to a 12.0-V battery. How much qjq s5d j75s4pztv .4rwork 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 stws- e abo*0gh tws01(9w jzx)tores $2.0 \times 10^{-3} \; J$ 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 ;+(jqxd9o xm tconsists 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 capacitorat z(v,g(c k/m 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 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 consists ofpy gn// mti;mi xx1q2;r)p ov+ 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 area ofn(- t3jqzx3:e mo.j +r0mgteh $0.40 \; m^{2}$ 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 i7ch6x +nyxd9(fy 2c wzs 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 andzr.6 0ldd ero,ko7ov j/n +1hv 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 capacitzvr/k vlo0d1ro7he6 +njo.,d ance 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 mza2r5ym6u 1xt(kx t 650-V battery and becomes fully charged. The battery is removed and a s62156k(a mtxrzyxtumlab 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 inserted?

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