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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: 游客未登录  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 vyxiuu7-u4 vx. ector?

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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 iu0kcb a) rlxeq9 as )5sk)mfp,vh,+ -ms 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. 1yw1 zl kp ib+2j1ob,kObject A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potential?l1 + oik,2y1wb1kbzp j

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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 directio( * 5 ym8uc+q0hb:yk0wxubuhxn 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 direction oppositeh6x6h ,gd ,cne 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. They)h hu8 y4ccjg2wm;mf5

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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 accenud 4 t +dddohs0)t*x3lerated from rest to a speed v by a 500 V potential difference. If the potentia3d+o04t n t*)xsddu dhl 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 pointefa fx8px,(qlbkq.tt ;;q1e3 s are 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 B along an equipote4y k pfjurs1)9uc 43tlntial surface.jctf 9klspy1)u4r4 3u

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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 wsj.,lg n7+sqbe

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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 heqb7 ),*nsxscieg72a charge equal to that on the electron as a result ob xe gssqc72ei)* 7hn,f moving 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 aszl:fu 83 ,x uk0g:5vzr.aon t 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 correspondo8zv6 +i:r ueks 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 is 10dw:9 6wsvf 6jiaj2)ye0 V. What is the absolute potential 4.0 m away from th6vwi2 )9 djjy faews6:e 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 chari u/p6xc38 vuxge is -100 V. What is the ab8ui6u3xx/c vp solute 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 exacthjpj5z 4fl),/e;ki19t5+tzx cjb m zz 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 absol 4 z jmzte59htp lc 5jkx;i+,1/zfj)bzute 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 rs;23k k5dnta ;mfq;lsquare is 3.0 V when a charge of +Q is located at one of the squardtnkk3; as2lm5 rfq ;;e'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(jwzlf awg1ou s30k7bn 66u*n 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 i(-kbs im)km;)ckd sul aje(.ps j-j ;3s 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 h6ewxxc/k dq 03dbxw-h*g*u1 one has twice the plate area of the other. If the smaller capacitor has capacu6 / 3h x10bg*hqdcw e-wxkdx*itance 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 cv6)1eynea *jjmt; .(q* z0vwda. qfzC. If the area of the plates is doubled and the distance between the plates is halvq*wnj.qaf 1m6;.(ej)v ad t0z *zeyvced, 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 capacitodcmi 9l(y29f ar fully and then is removed. The plates are immediately pulled apart. (With t m2c(9i9ydlfahe 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?

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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 weawr*o0e*t k-k wjqb *1bkened, the capa k1-ob w0*tkb j**rweqcitance 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 voltage bydfgip6+ xp+ne*u f:,a a battery as they are pulled apart. During this process, the amount of charge on the plates p+gfpfu *d,ax6ni +:emust

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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 m 8nbmd pl 6cc-zt3f9tbn 618t(2qukyqtf4 9t voltage by a battery as they are pulled apart. What happens to the strength of the6b9nfz m 4tt8dp 6t(qtkt 39l1ucm -fyb 8cnq2 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 dielectric materi6j3 bc *3ecrpl mhx*q:al between the plates of a capjmh 6c:*lq3c 3erb* xpacitor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material se zsv24yq0s; 1a2t1hxau0u wwuch as paper is placed between the plates of a capacitor. What hapu1 2;y hu4q12w0 vesw xazast0pens 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 between the plates of a ca16qon m/tr p-z kr-j/ov2uop /pacitor holding to z j-1qm/rvo/6-p/np2uko ra 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 and becomes fully charg(viah b8e4zml51ta 6ged. The capacitor is then disconnected, and the separation between t 1gi6854l (mazehva bthe plates 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 causes the +lma( *1sgds wenergy stored gs(+wsal1dm *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 acros+trk k1n d))gnv 6f9frs a given capacitor causes the energy stored in that cap96frt rfg)1)nv+kndk acitor 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 poh)538 de7rpm8lcgdob 6itg g3int A to point B. What is the poter cg m8t) gpig bh6735dld83oential difference between 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, w3y s*q.cg+ l)im9k lvehere the potential is -50 V,*3lgqvscymi)9 +l k.e 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 t0x x)h4nxb,0 uida vuiko*l/. hrough an electric potential difference of 500 V. What is the kineticxia)x uh. /ku4d 0xobnv*li, 0 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 potential8262 uigeqahx difference of 500 V. What is the8i a2g ehqu2x6 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 protoww.t8pzpb-1 on falls through a potential difference of 1200 V. What pp-1z bw8t.wo speed 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 do in movivsmasx *5 (;5fufl yz/g )p*-dvlcw;lng $8.5 \times 10^{18} \; electrons$?

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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 difference nfgg1eq5 *rf8d1)d a iof 500 V. What is the velocity of the fd5gr aq die*f) n8g11electron 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 restqj24 2zpa( gta through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the po2 ( jagtpq4az2tential 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 ele b )*clae-14p+ sdvwyrctrical potential difference between two parallep1vae+wdb s-4*ry)lcl metal plates separated by 1.0 mm. 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 a magnitude of 5 8yi1;s z zpcanlxc29l82(kqs00 V/m, is directed parallel to the +x axis. If the potential at x = 52(aczssn8 ;xl1 ky ciq8lp29z.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 electricrix p5c2-/m ar field of 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 i-/ra rmcx52p 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 direction of an electric field of ma0)em-4ln 2xf* c m 3av,cnjyx+ g2irekgnitude 3.0 V/m. What is the c ya3lvmxk0e en ,mrn4 2g+c )xif*-j2change in kinetic 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 connect4q c f,, bzb2s4cmk.hved to a 12-V battery. An electron released from rest at a location 0.10 m from the nq hmz,c2ck44vbf ,bs .egative 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 p 4ur/drr l*q-ae*x l,battery. An electron released from rest at a location 0.10 m from the negativeead,pr-q u l/* 4rx*lr 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, areym zdmg46 w7eb0/po(s 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 0g m04pe7w ydzs6(b m/o.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/Co7j nnhid0 ;wr: /cm-c directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is t nwh 7ic-d/0jn:m rc;ohe 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 directed toward the eaidu5up + v/yv0-fmx(w st. If the voltage meas + f(5-x/vyuiu0pwdm vured relative to 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 potential0tlyk, g,m.oh8 teo12 s;ibc k difference of 12 V, it will acquire a kinetic energy (in the abso gkeyo0bti.mckl2,1;t 8,h sence 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 rloypnbwwq/p* 7*0i0 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 stick. Find ty (*t rqs(wu*;9oghz ehe electrical potentialy(tog 9eq *;r (hz*suw 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 cvu2n/fu v lj4mt3 n).(3.0 m, 0). If the potential is taken to be zenfnl/j t u)uv4.c3 vm2ro 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) and a -2.0-nC charge is at (3.0 m, 0). If t. nnd 9mk 3mqf8g)2kvche potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at poi3mqnc d8)k9.2g fkv mnnt (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 juo npp3tzx i5 )):gl.-2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the w.:p)5 x3 pti gjonu)zlork 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 recta90xpy8/rs.o /cb/m ruiyr6gs ngle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, b/g.u 9ry/xi8 ocsym6r prs0/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. Charge u cm24uc4ksuuz1lqb.d7kjj 1g v 449ys of +4.0 mC are placed in two diagonally opposite corners. In the other two corne9l4 ku .qgkuuyvd12cm14 jj4s4 buc7zrs 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 f;q5b*m8rzb5(+. pce h enysf+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 thre w1li*nc9.iche charges, each of 2.0 mC, at the corners of an equilateral triangle of side h*1liic. w9cn 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 capacitorfgq+wkuzz fw.;(;a( n when it is charged to 10nz (k+wuz;aq. gf(w; f0 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 3l.k;1.: r5,yj am; alhpoued.jnjc v 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 plates aragnez jb/te q 16i5*u0xq+0./iozjzue separated by 0.050 mm. If the capacitance is 17.3 pF, what is the plate arej0 qo zjuqu0x ia5b/ie1*/e+z n6zg t.a?

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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 of adji /-nm jv2cah5 wilq77jvam ,*iz:/ rea $0.20 \; m^{2}$ 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 capacam 8rnr;qsq.x(y; mk/itor has a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with thmq r( km/srxn8 ;.aqy;e 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 conn.p.str* yx7 cpected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in tra.txprs* .yp7c nsformer 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. How much energy is stortoj p,e.k; ua(ed in the cao tuj (ep.,;akpacitor?

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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 cej y(3c pkvq;cwzi;*2 apacitocpv;2ze *jiywc3 k ;q(r?

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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 nvfq.g,q/flzv -1: i nflows onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was doz ivl n,v.n/gffq q-:1ne 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 itqi/h cth/in,+ijx 5ux5n0ax 2vcp. c 1 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 consistshx qj 2pk9.s.w 1pbjt) 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 plates of ad wa+n2j /ko4xjlqpd4w)d8hn,sa(p*rea $1.5 \times 10^{-4} \; m^{2}$ 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 ofutgu; c/yd.pq*,n/z np2d, wq/i wileu2s: u) 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 constructedd a- lmizzq.pf0d7.*c 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 conix rh;2,zqw4l7w .aaxstructed 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 connec. agw19e obk*knx kp+j6*vg(mted to a 50-V battery and becomes fully charged. The battery vn*a* 1 k gm9pko.bjegkw(x+6is 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 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 tostk jyg0(.u+zp6 leg oo ;1 8gv-a75xmbtil-j a 50-V battery and becomes fully charged. The battery is removed and alzgg.to( l0jsp+1givbo;x5-t 6k8- uejya7 m 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 voltage across the capacitor's plates after the slab is inserted?

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