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习题练习:Physics Unit17: Electric Potential



 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 followiki7rc*f* xhr+ 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 is 3htu;t,, i imaa

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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 surq2x v9+ui,inl h+ 9xxq 8n/cwzroundings. Object A has a net charge of excess electrons. Object B is grounde/+ 2,x uzq8chxlqv nixi99+ wnd. 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 thecov hqec ;v65 th0pm-( -/zjgozv t,9r direction 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 opposite (5afeb+tsp41w5 4wzeve xo (cto 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. Thee 52uk )2sfl.wi,a sc)k4i1 e gxcr-eyy

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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 by a 500 V potent;pn 9g m;:i2i vixr;bc3o:qixial diffe mb:x 9;vicgor 32;qxpn ;ii:irence. 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 sa*bq 7a e47;kxxpzlr3ome 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 equipotentigefiwzb*f (( :sp );epal surfac)iw ge: f*e(pfzb;(pse.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface 7ybuwb+ :/ahz 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 yn 7z2t (l5dylthat on the electrond57yzlt ( y2ln as a result of 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 a unit vk/6g d,k w 7fxzw0*pkof

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspob d fw8;(-j:1b glzl8uige*frnds 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 q0z cguib1 5arrw1:,7 msa) tha distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from uhbr cmaa75qir11zws,t :g) 0the 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,; p cxyw; k4cl es8wozl1oby *e9.dj.egative point charge is -100 V. What is the absolute potential 4.0 m away frocdyjw4 zekp1 boo8l *,l e.;cy.xws9; m 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 08lbxw ycz ((/xnc q3ytw4tj: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 when each of the other corner:ttw 3q 4cj(0c (yyw8bn/lxxzs 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 squarehb6p8kl8b* w+*dp zbj is 3.0 V when a charge of +Q is located at ond*l8 hbw6z8bj* +k bppe 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 ax sp-qm-ui zuxw)p 8,*n1x gqq7k:h:consist 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 is a +ox6gefx8u.fzcpp +o, k52di

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate capacit(jz ,mrl -te0uors are identical in every respect except that one has twice the plate area of the other ( 0-,zmtjerlu. 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 capag4g:,tl nmv pd1 qs/2s 52 2ob5dsnoxwcitance of C. If the area of the plates is doubled and the distance between the plates is halved, what is the new capacitan5 g2xm,s/g2lopdqo tw 1 d5 bn24:vnssce?

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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 capacitorqvr 9b)97k* t hrror:r 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 krr *)rt9 v97rrhoq:b 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 weakened, t:(rsj j7l2hvimx /) qqhe capacitancesmq2h jr(:jlxi) 7/qv 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 voscqi-:f,*hlrtg a ng 3n -y:.vltage by a battery as they are pulled apart. During this process, the amount of charge on fh*srql3, cyivn :agg : -.n-tthe 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 ma.3usz uj(h k0sintained with constant voltage by a battery as they are pulled apart. What happens t3ss0( hkuzj.u o 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 for adding a dielectric maced. -m*pma z3terial between the plates of a capacitor.3 pe-.mz*dmca
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material suc7htmtv //bdwu ewd++3 h as paper is placed between the plates of a capacitor. What happens to/u/t7e +wm d t+v3bhdw 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 thedcvi9vdn0r/v-ll 44k plates of a capacitor holding a fixed charge. What happens to the el4d 09 k-ndvv4l/vilrc ectric 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 fuhlea:u s7)9;-los p,ld (x hwxlly charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way p sawl);ldo,xl:(e9- 7 xhuhsthat 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 enqappp+q4 oz56j ; wh(z5c,eavergy stored in that capac 5wvcqp,+ pe 56jqpa( ho;az4zitor 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 acrossz)nc 6e; y y1n;oww*nd a given capacitor causes the energy stored in that capacitorw zynw)yd;*n6e1 ;nco 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 chargy:lb-ken *ev-.md/ u21 lntrve from point A to point B. What is the potenti* .e yekd-nm2b/ruvnlvtl:1- al 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, where 69jlc4u ,ueo ithe potential is -50 V, to point B, where the potential is +50 Ve6,lju 9o4iu c, 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 apq9ecqxy ;m.947i f3b5zvc m*rp wzj :n electric potential difference of 500 V. What is the kinetic energy of the pr m.qp3rz5xmcwq;z4i *b ep99cj:y v 7foton?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially zz 9;old 5i;g 9qpx.jpw8d6 tfat rest, is accelerated through an electric potential difference of 500 V. What is the speed of the proton?idz d5;9qpt9 xf ;6g.wozjp8 l

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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 dif4oej+bk:a f*s 3d.;qm odf;kzference of 1200 V. Wham ;;.b*f 3jookqzf4: +sddke at 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 movp 3l5 a26frgkxing $8.5 \times 10^{18} \; electrons$?

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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 of 50kudoy,n-gf qw5fr.m - lal 6100 V. Whankm0ar , y .u1gdlfw f65q--olt is 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 i:vl+st p9t-iey e*1vis accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. Wh+i9yiv * vp 1tl-etse:at 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 electrical pote0 3dtj2z/kszvntial difference between two parallel metal plates separated by 1.0 mm. What is the electrv2jzs d 3tkz/0ic 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 pcy,0fnl g-gqsqi ge yn18uh2r8 ,8ch+arallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.hyc,l8g+1iy s q -8 qgn 8ceh,f0rg2un0 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 thezan7+ei 9, f7voh 1qfd east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at avi d fz79ohe1,7 a+nfq 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 7i +bq5f4rbqu-mp*b3 v1j v do*t3p/k ,ujlrhof magnitude 3.0 V/m. What is the change in kinetic enerpo trl1 3bq*uhv4 bu3+,/m- q5idk*7fvjprbjgy 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, separat j;(eklv9jrro :7p 2tvl-mb4eed 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 ep( ;l e-bmj9lv:4ojk 7tvr2rpositive 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 05q 5l6lu +eleklh6i;h.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 0.050 m from the positive plate, how much h+5l lelu;hi kql 65e6kinetic 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 cog+1 pr7flh:dcy5v 1xm nnected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arriveycdx 1v l75p:fmr+1hgs 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 directlz .j :/(gttt3aagq+ged toward the east. If the voltage meast+za g.tql3 /ga:(gjtured 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 directed toward hff/f/hvx2r. lc+s p)the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltav+fhr fp2/ l ch)./xfsge 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 potential difference of 12 V, iy- jgikhj50j :t will acquire a kinetic energy (in the absence gi:h05jj -jkyof 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 distan f9qx.t+es*t tce 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 e3r,; 94sxwyvi.dfu1be/ x: lc h (uiga meter stick. Find the electrical potential for the center of the metewise9g 4 u,v h;fu.3excdx(:1bi l/ yrr 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 c *htyw9)ti+h xx4x.tnharge is at (3.0 m, 0). If the potential is taken to be zero at infinity, whay ht in+tt)9w4 h.x*xxt 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 ih7.c;f2 l5 lh0frypn .dl8y0yb 4wop a -2.0-nC charge is at (3.0 m, 0). If the potentiaip25yd.hlrpl84.yy0wl h 7fcfbn0o; l 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 charge is at (3.0 m, 0). Is*e1hh cj5( 4ryu fd tdy(/(xvf the potential is taken to be zero at infinity, what is the work required to bring a 1/ (h5chsjdf(yy(v rex1 ud4t*.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 rec/:: ye i9ze1stuv5azw 8frlw7pd e/ s/tangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and ef9 wlzepi s 78 5e/ty/:z1u rvaw:/sdb = 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. Cpkzd 9sibb /5i,n25nmharges 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 mC. /ibp5,nkn5sm 2 9iz dbWhat 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 4n ,t 4;tst9 fz2(/yalfyaopy+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 three charges, each of 2.0 mC, opo ,(.5plaw 5qxad2d at the cornla xpwa, p5(2d.5qdo oers of an equilateral 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 a 2.0-mF capacitor when it 94cc qlm6z9 ax4f8 qkgis charged to 100 Vz 4g fkmlcq98aq49xc 6?

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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 plateewib no:6a 0b*/jq-w vs 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 are sea57wb(yf uyn) parated by 0.050 mm. Iy ubf7w5y )a(nf 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 capacitor has plates of areazv.i8q+i)y;9udt w d n $0.20 \; m^{2}$ 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 separa8zbgoeolac2 z84+ -4 a3s tc zy5z/aa;btuc:etion of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, what is the electric field betweoc;czb g3z8bztac5eay8sot:2/au z -l +44ea en 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 connectfxw3jti -l yf *lnj3:)8 :mpnfed across a 100-V battery. After the battery fully charges the capacitor, the capacitl*lnfp:x)f3 n-:jm ji38tw f yor 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 on a 15 m e;m(,pb,sxajj j 0r3s7 c;dblki4io/F capacitor. How much energy is stored in t,x4b sjo dsbje( r3;;ki/mcl07ipa, jhe 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 b8g3q uu:mhh-b e11o da 15 mF capacitor. What is the energy stored in the capacito3eg1ou hhq mdb8ub-1: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 flows onto tc91zdm6m w1gn w ,p rb,p *9pcv)mib9the plates of a capacitor when it is connected to a 12.0-V battery. m 19m 9wi)cw9r, p*6cptbm1vg,zbpndHow 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 str/o/fawr0kbloh m :zq0-.y +wzz d71o 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 cons iq3 4flkk.o dord9k7v -t(r+gists 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 capa 4ckvz)uxta0k e.s- z(citor 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 of pvuc+:*1zzthk,n uu0j lates 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 zr1d**6 j zoqgwith 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 const /4eb8i )ftuxwructed 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 fullykp3ni wchsp 4773;fe, e-golv charged. The batter3;c,3e- 7fhg47vl ewnpp oi ksy 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 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 battery and be+8rcumwk6 a+0 zx+ psxug7rgr2 l69jkcomes fully charged. The battery is removed and a slab of diel xj6xg k2ap+rkg9 ml++6su0rrwc z78uectric 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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