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习题练习：Physics Unit17: Electric Potential
本习题练习来源于51fly国际课程 (https://51fly.win)，是在线习题练习的打印版，您也可以访问本平台网站(https://51fly.win/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 75 即可在线作答)，，作答电子化后可随时回放，查看每题答案与详细解析，搜藏保存任意题目；教师使用本平台可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力。本试卷的直接作答链接 https://51fly.win/test75.html
 作者: physics  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 ve,3dxkn i23viactor?

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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 isd ti3t0z4baz6.rr f;u 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 surroundings .ioi2c3 nisl4;ixeqc1qm)3n a :0bz f. Object A has a net charge of excess electrons. Object B is ground).:mn3;o i in3c0cszxq iael2ib1fq4 ed. 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 elerl mejc,*ra ::4nho l+ctric 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 elecjf;e drtwo5 :+f.sxd8 tric 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. /)*ggwlo /bwzThey

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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 speedoyvufcx 5 */n9 v by a 500 V potential difference. If ty*fvu/cnx5 o 9he 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 refew-mibj j1 8+s7ncb8 zyrred 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+-cs5:/oq v xpm hbqsr w.ex9m(xl9d9 B along an equipotential surfac+9b5 -9swoqcl9 (x rx pexv.qmhs m/d:e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must 6m: xti( t oc7jr fs esh,2-zutq8w0x/t.c 6jabe

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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 cnda0/s5 -y qtqarrying a charge equal to that on the electron as a result of moving through a potential dif/5-an0 ydstqq ference 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 o-rs fg zc3t1+df

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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 *09 ntwklu,+1k1db; my pljsv 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 *3 bsk0 1fpd ftr52cdho/tqfp* kb2f *kj8qb8a positive point charge is 100 V. What is the absolute potentipp*tkfhrq8dob/sf1 *53db0c ffjq*2btkk2 8al 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 n -vmm*7i-ziby d;(d 0vg+d ydpegative point charge is -100 V. What is the absolute potential 4.0 m away from the same point cha-v (yd biz;mv ydpd0dm7i g+-*rge?

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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 wheo ddxk- c/ z;()s,jxlyn a charge of +Q is located at one of the square's corners. What is the absolute potential at the squa o,lx)dxs( d/z;y-cjk re'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 squaref.gsgmhw /b y4+.,o x ;n6fgxt is 3.0 V when a charge of +Q is located at one of t;gxhoynb.gwt.6m +ff sg,x/ 4he 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 of two charg .zdh*lt o p*h 1t+9um,wmfpb;es 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 agf+*t;otte* mti3/rou4 ugt ;

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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 excet;wq7 yi-j o-ept that one has twice the plate area of the othe;- 7jqotw- yier. 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: (/zbmiswe3e7x vy8 n of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new cavemix nwez8(s:3 y7b/pacitance?

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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 capacitorc4ly9pz -0n:v*5 whvj,8aoeluo tl s1 fully and then 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 tz9, *vntlcl:hpjwy5 4- o 0savo8el1uhe 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 gi f40yq5f dt/b0it hdk5ven capacitor is weakened, the capacitance of th5 i5 f dty0df/thb0kq4at 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 paral)m4qd (j ,houllel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the pljdo4lu) (,qm hates 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 voltage b7da5xn:yxds ( y a battery as they are pulled apart. What happens to the strength of the electric field during this process:asdxd 5 7xy(n?

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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 betweeuio, c2lz7 c sqtm3a6l4-d0oln the plates of a capac6qdt3c-ilzlsm 2u o,l04cao7 itor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric materiala 6o;m,o/wc3gl s6 anj such as paper is placed between the plates of a capacitor. What hap s3ma6oc6ow agnj l/;,pens 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 7cgm;kj(ar+mk,q 3 ekbetween the plates of a capacitor holding a fixed charge. Wk+jka7,r 3 (ekmgm;qchat 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 onpt:3-y xx0w4w8+ wj +x nfzuis connected to a 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 leaks off. The energy stored in this ca3xww0w y+ n-pt +x4nzx:ju fo8pacitor 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 capa t0,d/ xpki:n9k3fiigcitor holding a constant charge causes the energy stored in that capacitg/,di x 0kni39ipfk:tor 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 g3/bhe:tqz* d in that capacitor tt/ *b :q3dhzgeo

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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 /skv p) *dr/jrpoint A to point B. What is the potential difference between prsp d) r/k*jv/oints 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 b i.vm6(s 0 m.pz7;z,1 a 7eqdlcopkvepotential is -50 V, to point B, where th ebc, 7. 1p;6alzv7o.i zq0dmvkp(s mee 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 h1poy kdacc9 c-wk(( 3at rest, is accelerated through an electric potential difference of 500 V. (h-cwy9k ak dc(o1cp3 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 accelerj1+,pcg4vz x/utlv s1ated through an electric potential difference of 500 V. What is the speed of the pru, 1sv zj +tl1vpcx4g/oton?

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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 falo:p6 1saxz1t 8,qiy w0 oggmq(ls through a potential difference of 1200 V. What speed does it acqzoqg,t p 0iq1as:g8x w(6yom1uire?

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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 9.5ap k(.3qhl pxb xxc.90deet80 V 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 potential differj;x 7v* txw3kwifc +6bence of 500 V. What is the velocic6w7*w3 j x t+bfkxv;ity 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 a)u,1hgje s;xhkbhhw1 t+0 :lmccelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potentshkl0xhhhej1,t :g1) ;m +bw uial 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 potent9tbv)oj +:cnhm 2h1 nzial difference between two parallel metal plates separated by 1.0 mjh+9m:2 toz) bc h1nvnm. What is the electric 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 agt mq6/ug :d1o magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is q: d6gtgmuo /1the 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 ofg4w 5is gc + jqew4/v3rn9u/ck 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 point 1.0 m directly qgus wec k9 +wrgnc54ij3//4v 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 direction of an electric field of magnitude 3.0;car1 k-a .ieae d25(xowep-g V/m. What is the change in kinetic energy of the proton1 ir-dg(ap.-e5w 2x ;aea ceok?

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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 cm /9jhx8b ag:konnected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative p akbx m8/h9g:jlate. 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 0.20kgnl.+ 8gt0)ftxrq 1d 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 distance 0.050 m from the positive plk81lgt gx)rn0 q.ft+d ate, 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 1mq.snhr/9mvkt (k.pto a 12-V battery. An electron released n1( mskrm/pk.v .9thq 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, 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 directehryxaf v+/j )2d toward the east. If the voltage measured relative to ground at a given point in the fielxj/2h)yrva+f d 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 elev t5tqdvrr3a 9fva3n( aq /;7gctric field 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 direct/q q r9d t(; aa75vv33rnagtvfly 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 f t6:2n g3 nfla u4pyt7/kisgxt:5g,g a potential difference of 12 V, it will acquire a kinetic energy (in the absence of friclutgp k5t:7nsnx4fgi g23:ag/6 t,fy 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 atw 97*g ,.2l;i7bpwwiepx mfqiy(sp:t 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 stipht9vdgr9;fay4jx(ke eq8 5 8w0 d+pxck. Find the electrical potential for the center of thd9tgp0a q(k;+ y8fp 85 w4rdhxex9evje 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) anu7g9hj +y7guu d a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the el jg+g79uuyh7u ectric 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 chhza/z/fo+0pb o85x v harge is at (3.0 m, 0). If the potento5fp/ vxha+/8 hb0ozz ial is taken to be zero at infinity, 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 char7/4lo 0cejpma ge 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 70o/p a4celm jfrom 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 +q2 ai n+ zt3a(+/otdrxhq.l do, are placed at the corners of a rectangle of sides a and b. What is the potenti n+ /arh,.loo qt3dxida2+( tzal 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. Charges7 zvy)1ojc u)sm.l :uv of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mv: cj1 .yvs7uolz)m u)C 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 (char0f6n de5fichhld.z-/ ge +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 necessamxx*.:.qjs7 uia)tmw ry to place three charges, each of 2.0 mC, at the corners of an equilateral trianm:i . sxxa)u7tq jmw*.gle 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.(;fy6m -o jah rj6*a.kw0nc un0-mF capacitor when it is charged to 100 Vf0ru-(n akjn 6*.ohwcy;m6j a?

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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 p-p e/7ct:2lol7m oliof 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 plat-9omqvets 5 mmzd+lu m9;v i;.es are separated by 0.050 mm. If the capacitance is 17.3 pF, dz-vslemm+ut v mmqi9;5.;o9 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 of2fm2 0r rg2)d ;oyfgv+m5:*v fzvmam h 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 sef q* 6w,5z0ustny7zwb,y8 o avparation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, wha w6uznv7w*o q,8ty ,0ysbf5azt 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. Ap2:lut(.km xffter the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional chargek2p(mx :uf.tl 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 a 15 mF capacitor. How much energy is storuw8ua7 4:axpp sf87za ed in the capacitoauap uza:s78w 8pxf74 r?

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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.t 22*m,v(os(v*g etf dkdr-ok3ti lg 6 What is the energy stored in the capaci2 grf*(k*iv dom,etvtt 2 k-(ogd63s ltor?

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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 wocdx:n7 8bcw8 te:xqb,nwn: 5(qcl0a hen it is connected to a 12.0-V battery.owx78 b(5tbe8,xn 0qd c :wln::acn qc 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 (pkvjeps.okrn66d6 ,*0g7un ee1 oy r 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 o5z gp fv3t8ibb3fc3 +x8b +xzsf 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 con/ m un(q+.qsyv6jsdveh 1 dd(; 8d6ryysists 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 consismi0v+ x7zoja; ts 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 ajan)/ ml1rrb3 rea 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 ihtx :hx(:l b,ss 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 and becomes fully charged. Thera;/svj7(k vprzj;2veq0f6ulzo* r j0n ei; - battery is removed and a slab of dielectric that cj (;ao70usej r2ei zjr0 ;6zkvn/v-; qrf*pv lompletely 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 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 roh(8 6y hqwf.6ti, apbattery 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 diele i,poqhary6.h6t 8wf( ctric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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