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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 followi)(:z(:fe (mr 1sqy v*gxg)eptof 9tkm g5qnz/ng is 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 is2+ 0e hkcxfn40ckz* im 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. Obj3r5ft bf n8t0tect A has a net charge of excess electrons. Object B is grounded. Which object is at a higherntf8r5b3 tt0f 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 electri c;xgqbvn:;5 n9p (hvcc 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 dir2tf2 ehqj;*9j (3yv*ze nea xfection 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 conduct54 , twdgasx:aing 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 reshyr fqk+7 v )k*c:clv2t to a speed v by a 500 V potential diq2vl): cr ckfv+h7 *ykfference. 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 referred06,mcpxl mof2 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 B along an equd2u w/ 3mwyf/wipotential surface./2u/w yf mwdw3

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surh9hj8 q c u8ph*-pea6dface 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 bybf8+h)pwlzg.sj sm n )j ::1qz a particle carrying a charge equal to that on the electron as a result of moving through a potential differencps1gq)bz f+l:.jshmn)z j:w 8e 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 ua v/pkyy/si+)y4iv 1a 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 corresponw. fzu0y gnufi93 :ib1vw(5c ods 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 5 7tx5g;w- :d kdau:7jcagc xccharge is 100 V. What is the at5dc d5x:u7c;k :7agagj- cw xbsolute 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 ch ec(t0)0 tbqkwf+ *w+esijgp6 arge is -100 V. What is the absolute potential 4.0 m ae+0fi *)gej(wtt0 sb kpcqw 6+way 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 ex xw: 33rr(xxhzact center of 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 square's center z3xh:3xr (rxwwhen 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 36iuy/wzaksc f0z 52c7) q8s kk.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 z85w )ssuqk7zkc0cyak/6f2 ia 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 yv j2k-kv;ny o l7gh28two 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 voltp8p 2l jp*uh.f,.tw,n jhy p(u is 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 that one sui:gezbj 6 68has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacbuj 6z 6eg8is:itance

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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 hacwd(ny(j ps1 ;2 egdt1 lh,:l-9,wgv qp4ayaos a capacitance of C. If the area of the plates is doubled and the distance bejd y1w4-,g(pahglop9 wn av;e:ctd( l12y,qstween 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+p o,udtil/a / removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the p dl+/at i,/oupotential 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 owx- p7z y-romv.2.epcf a given capacitor is weakened, the cap7r x epoc.y2z.--w mpvacitance 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()4)wxmnhee u voltage by a battery as they are pulled apart. During this process, the amount o) weum eh)x4n(f 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 conshw y /m9p)z+6g -ch)bas g7sentant voltage by a battery as they are pulled apart. What happens to the s)ne b)y +gw hz7s pm9/sc-g6ahtrength 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 di u8*m11waaqn celectric material between the plates of a capacito18mn 1cwaauq*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 capacitomzlh9kkjh(pq8u+m /qb d:m q2e9 p .i1r. Whi2je uql khp(991hkq: pdmz/mq.m+ b8at 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 as paper is pj8e of1ro(l c8laced between the plates of a capacitor holding a fixed charge. What happens to thej l8e1(8r foco 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 and beco05vs/sj a+ k1e ky)1ymadn3tpo7 vlw /mes fully charged. The capacitor is then disconnected, and the separation between the pl m3+/ /5vtky a7l 1wsdv enyos1apk0j)ates 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 constant charge p+qdn)zec p- )ix,)py causes the energ-)dz) pci q+ype ),pxny stored 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 c 1-1 :ft8/:dgv0rq0 bvud3tkbtu pc dhauses the energy stored in that capacitor0f/dtvd:1 hqrk-pb0 uvd : 3g t81tcub 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 frorx0 y8ffzamqt4 k(- /vm point A to point B. What is the potential difference between points0z8 t4y ffarx-v( /mqk 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 eleo5lmxywf: kythr3 +(s-u)+w kctron from point A, where the potential is -50 Vl+) wmkrhuykft y s:-x (5wo+3, to 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 accelerated through an el,;oiooh7cdf-u c f*p6 ectric potential difference of 500 V. What h c7o-i*;cf6 ,u foopdis 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, ispo :kaqo/l0 dg14 jgf- accelerated through an electric potential difference of 500 V. What4/ kq1 :-pf0ggjoodal 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 potential difference of ua,ml43h,nz u -mk9 lm1200 V. What speed does it acqu am4zm-nlu, 3 m,9ulkhire?

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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 9.0f qh8jb5: )5w9vxsphf 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 electroqy - ,(a *7k0jdjevgyrn is accelerated through a potential difference of 500 V. What is the velocity of t*egadj ,0y v-( kq7jyrhe 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 accelerated from reska ur;n,,ee ;nt through a potential difference, and afterward the ball is moving at 2.0 m/sreu,,;naenk; . 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 emu 0; wzklp3*olectrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the plam0wk; luz*o p3tes?

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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 magnim1cr)*v d ad4-zi zj:lphh.8eki6h8j tude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x dh ra:e146kjmiz p-)hv *l hzi88c. dj= 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 east.l.yzxye.u 0a x(hc+g 4 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 west of th yu(x+azc04 xhy.lg. eat 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 thewwtp+ pr-h38 d direction of an electric field of magnitude 3.0 V/m. What is the change in ki 8prdtp+3w -whnetic 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, separatejd: 9i:i ,lhd o0vc:kvd 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 distance 1.50 m from the positive plate, what is the potential difference between th 0vodj: h9vdki::cil ,e 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 auzx l+w(7zqgpq :jz5 1 12-V battery. An electron released from rest at a location 0.10 7:z+wx1pqug z( jzql 5m from the negative 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 connec4 jgs )(u7ocfsvj 3w l,eb8*coted 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 plate, what is the speed of t8ujl3)bc*f coj7sg ( v ,es4wohe 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 towaryy o58 +t01pe2qpauzd d 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 directly east of the pp1 z0tyu8d2po +5 qyaeoint?

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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 fie*q3r5 uwt e0- dryy)wild 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 1.0-5 y 0wqter*)3wyrdiu 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 po / fxzhftl.yugjmv)7 ye7* a++tential difference of 12 V, it will acquire a kinetic enuzf y l ha)jf/+tvy*ex.g 7m7+ergy (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 distance ooj005w u;h;pqz+ wx0 m3abx olf $5.0 \times 10^{-10} \; m$ 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-qr,z *6ipij p ends of a meter stick. Find the electrical potentialjpr, -qz i*6ip 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 -2.0-nC charge is at (3.0 m, 0) q ;e9bx 1ximtuiu+-d(. If the potential is taken to be zero at infinity, what is the electric potential at point (0umqi-i 9;eux+d (b 1xt, 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;-xuk3n gie 3s) 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 electric potential energy nsex 33uig-k ;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-nikx3: 1hl asjb1qmt. +C charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work re+hjm13 sl1k:.ti ab xqquired 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 recto qm dm*xvoox+q/u98-angle of sides a and b. What is thxqumxqv/ 9o odm*-8+oe 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. Char(vmy7e yu (nk) jxen*-ges of +4.0 mC are placed in two diagonally opposite 7u- m*)ny(jk(xvneey corners. 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, mass f cion0iij+k3))e6t v0 vctkd-b44yj$6.64 \times 10^{-27} \; kg$) 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 charg,0fh: l5 fgg s)sdey8q/xdlq(es, each of 2.0 mC, at the corners of an equilateral trianghgdyes qgfl 5s/f,8dlq x(0):le 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 is charged t5ocb:*,r su gc()vbkbo 100 r(*k:bvucc ,b5so)b g 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 capacf j /3,izdma5nc1aj: hitor 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 witpe /regbk jj5-.89xs lh air, and the plates are separated by 0.050 mm. Ik/ .5bpjgl98- jes erxf the 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 cap5b zy:n )g h0gn84evpaacitor 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 plate separation of 5.0 cm. ;)7ns6ur2 q t uy9yqhtIf the potential difference between the plahuquy7)tq2r tsy96n;tes 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. d vz,( yv4ovd: fld )kw,v1dh,After the battery fully charges the capacitor, the capacitor is l)vwky, o(z dhd,4f1dv:v,v dimmersed 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 a 15 mF capacitor. vsds4q1hi 8;w How much energy is stored in the capacitor?hs4v d8q1;isw

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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 capacitoa0 s21erxv6 s u)zln7oawk +d0r. What is the energy stored in the capacitos)de s 60r70a+xwulvn kz2 oa1r?

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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 9 mi9tb*0gxgfflows onto the plates of a capacitor when it is connected to a 12.0-V battery. How much wo0*xbg9g m9 fitrk 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 ;o .xe)kp: egtr8bm(7 1oq1/ fcururw2 e7goocharged 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 capacitohkh ,bfh* 5,wcr 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 plat4/+(oywk bt*hl 3khepes 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 akrev-c nhs :vz :u b;*jxt9)9plates 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 wii2o a xe5b1 .o2mdecp0)uld7e th 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 constructe8 exn pefi-z) 8)9rnhzd 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 connecteeio. i 5zi(uo3d to a 50-V battery 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 dielectric constant of 5.0, what is the capacitance of t ozio5ieui(. 3he 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 clpv b0/ cq r(jg)u5)fxharged. The battery is removed and a slab of dielectric that completely fills thcpu5r/)l( g qj0xf)v be 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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