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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 vecvk;7c.-eq jv1xu d)vg tor?

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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 3dy0p asw8 a *.dzb 6d.wlxm*lis 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 froyty.s kjbl:* 4m their surroundings. Object A has a net charge of excess electrons. b: tj*k.4ylsyObject 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 electrjfy-4i;n.s4e tilgx *3dty7 uic 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 oppositew ux ax;b/8 gb2wd9r,h 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. 1+juz;0;ftg some0 enx 5fz a*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 togaqyvm3am w l4;cj ;4j9 o ofuqvc;1v.(pn.v- a speed v by a 500 V potential dif.qv nypw4lo jgjvma49qv ;of.c3cu(- 1;avm ; ference. If the 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 same potential is referred pqfav bl46;; ni9-)anpkrh b 5to 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 B alrz b7z y,wr52rong an equipotential surfacer z2zr yw7rb5,.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surv-6ho6ja;+mli ql : xcface 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 the0o wzpl4g x.ng5hd8v + electron as a result of moving through a potential difference of one wl0n4gvh d po8.+gx5z 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 1gvym.jl c5w 7jlej-3a 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 correspo m qd-j*/5vyi2bhrhl.nds 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 charge di-p9e,zhi/ u+2 eeq d)ebp;z is 100 V. What is the absolute potential 4.0 m away ;e+b)2-dez9z ippd/ he,e ui qfrom 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 xvfecm77yc, 4)r r afm5a5 4kwa distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m awafc5f a7wra 7m 5)x,ym4v4kcr ey 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 is0 3 jp,*;cheoeyk zd3o 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 each of the ed,jz3*;03 o yechokp 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 centtvhll9q qh*mm/ x386a er of a square is 3.0 V when a charge of +Q is located at one of the square's t/8q h6mla93v*hmqlx 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 zm+s,ioq d1e /lf sypz8,8ff* 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 7 tzro 3wr*q(2krqvgl/s 9pk 5is 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 areoz2ystk /wmo1 28colfjy h8c *oq97g. identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one hac mylztgf1o/o q 72yoc*.whs8ko298js 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 hach5rf x.6r .:;linzuha zd5a)s a capacitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new .d rh 5ua z;c6.zxa nirfl5h:)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 capacibq+2mk6ag5,1z3n vcu lvq4ba m0s b;xtf.fg5 tor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on tvtf ;gl+fx4 3 2qgm1vkb.m uz65 5qanba0csb,he 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 weasl;6tr0v.bt2i a:cb m kened, the cal6v tiab0s: rt.cm2 b;pacitance 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 capacww0m/7dx8 : zaz x:io.y(93syntqpys a*r0e b itor are maintained with constant voltage by a battery as they are pulled apart. During this proax/sz 0*i .9soyp3x y:bw:( 8mtez7yrnaw qd0cess, 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 withq . b,z6dhhqbwc)h*5h constant voltage by a battery as they are pulled apart.bhhd 6,zqhw5 *h qbc). 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 foutu argo4jq 6nk08az4;yc p2 .r adding a dielectric material between the plates of a capacito4orack.uujypn6zq t2g84 a0; r.
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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 capacitor.l4z 3hzt g)e3s8qhmb* What happens to the capacitanceh3ltzs8q hg *m z)e43b?

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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 capacitor 1dytd.o)9x dl holding a fixed charge. What h)d 1xtddlo9y .appens 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 giiz227 xoq:u2 ysv;ea battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge v 22ug2ez:io; 7iyqxs 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 causes the l8 lx55pors7e energy stored in that capacitor trsl7 x558eop lo

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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 th: 9lhyg6 l /s;y-j(;bpqbkora e energy stored in that capacph9qy;o(y6/ abkls -blg; : rjitor 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 j) au,y(s+gzfA to point B. What is the potential difference beg(s,jfz+ u ay)tween 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 potentiuw tc tz3.9sy4al is -50 V, to point B, wherets.tuw3yz c 49 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 au2 tq1xw c8v88k p6s0-yfuq7ji nbq:bccelerated through an electric potential difference of 500 V. Whax: qc 6qjn f 0wtq2up 8vk8sbi7y-81ubt 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 accelerat )uy7v)eh,wq:ne q7qged through an electric potential difference of 7n)uq 7gwyeevqhq,): 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 poyme2d+uu5o )ctential difference of 1200 V. What speed does it ac)yu 5 d2cume+oquire?

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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 in movkz0bw jz;4 u hv o+y(/t5tgsr6ing $8.5 \times 10^{18} \; electrons$?

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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 kmw+1 )3jkj ru1 g4/*lluqbazaccelerated through a potential difference of 500 V. What is m*lzu j3 k41+wj)rbl/1q kuga the velocity of 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 object is ,lci8dk k-nl9 7pxes; m.m+rlno,z .naccelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnilriezns+m;c9,n.nxdl. opl7,-k8kmtude 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 potec/r +eeswe)m; ntial difference between two parallel metal plates separated by 1.0 mm. What is the elect+res;/ecm)e w ric field 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 directed parallel tj s2-lfli.+h u-fzgnc5 t8x)lo the +x axis. If the potential at x = 5.0 m is 2500 V, what i8lz.) -j25- s lguftcxn+lih fs 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 fie,3)k.lmu 2xucy7wejf l+:jk rld of 50 N/C directed toward the east. If the voltage measured relativ)wmfku lu:je+lcx k,. 2rj3y7 e to ground 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 along the diryy xnvf +.w 47,jsex0rection of an electric field of magnitude 3.0 V/m. What is the change in kinej.y+fsewx 0x ry,v47 ntic 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, separated by 0.20 m, are connected to a 12-V battery- h3 6rig*rnwm 4lei1wzmx+ 5p. An electrorn iz5gmrh+ 346 pmw *w1-xlien 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, separated by 0.20 m, are connected to a 12-V battery. Ac9hz xn::/ja s69s eycn 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/z h:a9 9sc:csex6njy, 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 mwonr0v (u/x b(, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. Wo (xnvwr( u/b0hen 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 87 rql57kde-d3e t4c s 6srbdbfield of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is 8qdlcd8 b3stresrk7b764 5 de-0 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 electr8a,mgch 8ts 7gp cl*3vic field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the 7 8mc,thp3sl*8 av cggfield 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 throuw 6s3+kt87lbq/x3lqod r4 phzgh a potential difference of 12 V, it will acquire a kinetic energy (in the absence of fricwqrots78q b/ h+dz33lk4x 6lption) 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 dt -verj.orw3+ln2 4zoistance 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 e0rxntnfe5m8q56ybh ax:l7 ; olectrical potential for the center nnbtly:hq o7x5ef 68m x r;50aof 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 z 10gm6gv4v;doh u; jcis at (3.0 m, 0). If the potential is taken to be zero at infini d vhzv1;4cjgu0omg ;6ty, 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). :px*2ya d rvun9;ilq2 If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at point (0, 4.0 lxuq*yi 2pda9vn ;2 r: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 q kr(7z ;xen(gc.5tbrdv6 o*spotential 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.vs 6cq o5 .z*bgkxrt;(7r(e dn0 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 coysdi;bp74 8f urners 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 dps f 84biu7;ycm, 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. fhya6gmj+ ih.0x6;6/vrd)hp 5e: 1 wzvs lhuyCharges of +4.0 mC are placed in two diagonally opposite corners.0g h 6u+5a6l hxyf1 6wd)pry:ivv; . ezmh/hsj In 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, mas ,a9se0sr5lna hdq:ri+/*p fn) soe:ms $6.64 \times 10^{-27} \; kg$) 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 thred -qsat9kijk mx9 c/;.i8e uh7e charges, each of 2.0 mC, at the corners of an iadx .u k-eq jmksh;t8/ i97c9equilateral 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 aox*j r-oh qvufb/gd*0)* e6ll 2.0-mF capacitor when it is charged to 10*oll6dx)* *qgr-j hu0v/of be0 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 ckq: d;k ,qdi, *pl8vj ngj :sid4:7drarea $0.50 \; m^{2}$ 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 ijh3 utvr.h94ns filled with air, and the plates are separated by 0.050 mm. If the .4h3j rvnht9u 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 capacitpthb )ks pgx8skm 9589or has 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 plateqj vfw.x)fp96p: sg-y separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at sgx y6-jq)v: 9 w.pffpthe 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 battery f1jx alt cm48k2;fa-qcgm mm07ully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remain7-fjac4t8c m g mq1lkxam2 0m;ed 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 stored inl- f aci+6ut 2,c4q;tfshi4sj thus6ict+i -,slqf f;tc4a jh 24e capacitor?

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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 cvd po1wf1whsm692kt7 apacitor?s1 wkm1 7p2 owf6thv9d

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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 capacitowsovx3x.+ bhk3/6 e ydt5i/qe r when it is connected to a 12.0-V battery. How much work was done in charging this capacitor?./3x/owest+53x 6qyk b e vidh

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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 i/c r ck oi2o y8elz)i-.;hsft+s charged so 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 *kyl7l2/u;0v tergu; :evy xv 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 cu9tek :r:w /zeonsists 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 of plates 8ic*e0ft; qs rm 8zbq+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 ix, nf:9dl8nu2kf9v4 wa0sr6rb pq+evu-0ay ps constructed 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 capacitor is constructed with plate ag4 6 dzoz)d* ;bnte3rlrea 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 charruz04h,yw* gos 9u 5dhga0(jowt6v x, ged. 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 cyhusda9ur tgvojo( gw 4h0x 0w*5,z6,apacitance 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 5zm7w ss194w ked3)szoo1evl 00-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plat4e0) ozdl9k s e137wszs1mv owes 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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