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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 vectortoezm(v b f:+)?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulombbxqwv;;d zmfg3x 2w/: is 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. Obj h)5ufin9k mnrf bx/e5 otq -4g9f(l(kect A has a net charge of excess electrons. Object B is grounded. Which object is at a h4m )kni(kufn r(5o/ qf9gel5bhft-9 xigher 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 fz3jy(35j, f gjj pz/v )zon:u,i,oeqdirection 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 ,i1v azl fetb2)g,+di in a direction 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 holll n(jra gzn/uge:8 (5fow conducting 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 i h 5md6hc of:f5tly/t,4(fnybs accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 200hyy:nb(,h/tmtfl 45c5 6df of0 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 sd;lk9 kkaf- 2name 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 y1bp3:b:+vdf,f nng+aju3 tzu 4k /eymoved from point A to point B along an equipotential surfacet1 u3 3jbgy:kpynbf:+ /a,+f evdnz4 u.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface:dbycgfbk y1 ivv0g *x,3i,:f 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 0 rx)sz )oack2:q8ok/gkq w.lqv2 t3lequal to that on the electron as a res wqotkg qx0 vr cs):q8.zl3)lak22ok/ult 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 sm 7r g,w7 a(lg-)reifkuxd2: a 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 corruj6 qvt wu+*.uxw kad.7e9l .aesponds 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 poea)ro 8 e)lu+eu7 )3uh 3;ryj5itbtfwsitive point charge is 100 V. What is the absolute potential 4.0 m away from the same point charge7 3al; ebjrt o3u ee) w8hfyut)iu)+5r?

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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 neg6f9pztc ss2k.(w0-j0oifv sn ative point charge is -100 V. What is the absolute potential 4.0 m away from the same point ch 69pk2 s- o.(j00vtwinfsfsc zarge?

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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 + pnhczotgga9: w-(+wis 3.0 V when a charge of +Q is located at one of the square's corners. What is the absolu(wag wz-9gpn: c t+ho+te 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(t82/g,cnbu8 robhw yv m 0xh, the center of a square is 3.0 V when a charge of +Q is ,n ybru/,hgow0tvm8( hx2 8cblocated at one 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 consist of two charges that nn9t- l1h)i43 i ae;zvk2h tkxare

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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 ikzo)yf;ob8:k;x3vp 88za dl p s 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 areh-m sd *k w 6kj*94i1ym1p2p btfzy/jq identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger 29pjk4-t smymwi1 qpb jfd1*z/*yh6k 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 capacitana8:upzf-sen9 ce of C. If the area of the plates is doubled and the distance between the plates is halved, what i8snauef:z p-9 s 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 removed. The plg/3u5j/sx gj zates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential difference betweeng5x/j/ 3 zjusg 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 fiel i4)7ieytg o+hd between the plates of a given capacitor is weakened, the capacitance 7iet og+ )4yhiof 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 wit)s y8vi h0af3e;gi+ct)8ik zjh constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plj c 0)a;ki y8h3i+etiv8g) fszates 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 bqh,tuv/ *uh 0vz+ ucx8y a battery as they are pulled apart. W,ux*cu0+vhuzh tq/ 8v hat 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 for adding a dielectric material between the *6ox bj+s:pt ouk)i4u plates of a capaciusou bx* ko)+p:j 4t6itor.
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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 placedjma8 0zmm+*kbpp i /vix2.3aq between the plates of a capacitor. What hap8*/.xz p2 mimima0v3a+pqbkj 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-g x:x eny0dsm il:sxe)7xl*+ such as paper is placed between the plates of a capacitor holding a fixmexsnx s*yx:e x:igd+0 -)l7led 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 bathg57m:cwsrxp xf ,s,8tery 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 capacitor87crf m,swphx: s5 x,g 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 constantf3)y1 dkye4*mld*ii k charge causes the energy stored in that fil yy ik4k)ed1*m*3d 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 causes the energy stored in thwck 7fdsy,n4(xhv9u +:vo4nk at capacit +f,(cs:h9vn7ykkn uovx w d44or 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 ene ;6jvkt/ ey;targy to move 10 C of charge from point A to point B. What is the pote;;/6jktavyet ntial 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 2*rchlay gf8(cks 4. nthe potential is -50 V, to pccg 8k. 2srh*nl(fa 4yoint 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, /m-:ioqebk9t is accelerated through an electric potential difference of 5009:emiqt/-ok b V. 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 ak. fv hylb ffatz8t:nj,03g;;ccelerated through an electric potential difference of 500 V. What is the speed of the pff h3;,:jfla;zvn . 0gk bt8ytroton?

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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 1200d +.xibtef yb(-dbd+4hl:j w* V. What speet.j b :bw4bl(e idf x-hyd*+d+d 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 9.3truk0 my.yerrm 07 3y66vkcz0 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 differw, zfh(m0+ hjqence of 500 V. What imfwq0hz ,+( jhs 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 acc4libgs, i t301v e)kxgi x,kot/i1 2ikelerated from rest through a potential ikkti43t ilbkg1/egiv ,i2s )xo10,xdifference, and afterward the ball is moving at 2.0 m/s. 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 electrical potential difference between two paraluaj):( bwe vm/b4 e4jplel metal plates separated pm()bjwe/ evj4:u4baby 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 magnituu ;h 2 kqfr,oyn1g40gq .jukv/de of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is knuq,uv0. y go/r1j k24;hgqfthe 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 e7d rd.b kllfd90xle7)3-no g6jz rz9+iftm o.lectric field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V,l7f9r9d6tfj0lzrz.b7n -+i)m e lod3.xdgok 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 direction of an electric field of magnitude 3csgjg, pf8 zbp8zs-:0mafv33.0 V/m. Wh:j svf bg3ac 8-g38m,p s0zzfpat is the change 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 0.2m)x w3pyu7 5pl0 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 umyw7 lp5x3)p 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. (dpe1.expe2a5 os; of An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distanco5pp;e(2.s da x1eeofe 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 connected to a 12-V battery. At/w wssg/1a 32o;lp yan electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a d2agsltw a/ows3 ;y p/1istance 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 directed t.8 oa9pxhn d8i ye(-jeoward the east. If the voltage measured relative to ground at a given point in the field is 80 -hix9d e(opjy 8 an8e.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 fitt3r 4gx ujtm 3qzhcq86(1sr t2t/f5aeld of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field ir5ca4 tg( ts tzf21jh qrm/x8t3u6 3qts 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 potential difference of 12 V, it will acquire rtq / sx22:dn3 ye3kor +ol7yja kinetic energy (in the absence +qnr tek2 d/7o y3 os:yxrj23lof 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 t v x/q/tob:9) a)bz i/uv qd/zan2e1ea 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 g n9 c( 9phddwvn:ce.7the electrical potential for the center hgc( :cv9dw 7de9np.nof 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). vib ;fnye:8jf:w ; koawu*s1+ If the potential is taken to be zero at infinity, what is the electric potential at point (0, ;w 8 fk wn1*aeisv +:jfb;:oyu4.0 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 (j.d3vhaf a s;8cj; w8bpe(5 po0, 0) 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;38 p.bo5j j;a f p8cwhad(vse 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 -24t dzbo.7, sjr.0-nC charge is at (3.0 m, 0). If the potential is taken to zjdr7., t4obsbe zero at infinity, what is the work 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 rectangcu rn2ak72f* 2bl8vugle of sides a and b. What is the potential at the center of the rectangle if q = 2.0272uc vg*rb 2kunfl8a 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. Cdz;2j9t;mcd zee7krx*z j8 m;harges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed ch d8;md9xm ;jez7*ejz;2z rkt carges 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 (chargedc hwb1ms*:vx*5p 4on +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, at tp.n15xh2ktyq+u5 rgn he corners of an equilateral nt5q rghp 2uk1. ny+x5triangle 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 isz2 qplp6ns 5(z charged to 100 zl2(pq s nz5p6V?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate cap c*4k8ypmhh :jacitor 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 j)h0 l-k 0yw ;uky/us-tmrfh,is filled with air, and the plates are separated by 0.050 mm. If t0kuwksh,fr 0);humt y/ ly-j -he 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 ploupc9h)o cv4+vzwh4, 5 c :q1 yywx/xw31 bkljates 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 r4 st/n b)/amjp**ti v2uvw z(10c -ks, dqkdga plate separation 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 betkdp,4 vbd*/s2w)rni(t a /s0jv1tmgq-c zuk *ween 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. A :jt839 r utt7 epmlb *vms32h(xdnz1sfter the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much(2t1 duj sp9se t7:nm3 3mxrlbzvt 8*h 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 cj4mxo/cus(o y v :hz+9apacitor. How much energy is stored in the c yh:zvc9/moo4+u (xsjapacitor?

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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 mw)x68kva.z1 edxfuj *F capacitor. What is the energy stored in the capacitu azxj. e6w8x dfv*k1)or?

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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 when it is c/q.*;qc2w bzdbkvh1j pjb /kh(hoe 9 .onnected to a 12.0-V battjepv *qw1;o(h/.cd k hj9b./ b2qkbzh ery. 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 it storee4 fzk.3vx, kxs $2.0 \times 10^{-3} \; J$ 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 capacito- i5x2cuwpr/q bd7z 6cr 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 capahc qe+ u;qc,y6citor 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 consist68o(ajd4v,b5f m 1tz: 6ueigwn-puy ss 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 aregt,l1(pss gxr:z 0j*ta 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 platd6aw nxtj3ej.w:3 g5 ye 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 6:jn:px fuql76 z)hd8pj43w bq fz3 ll.ah ii)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 the capacitor after the slab is :a hf3bjil6zx.p )lq ui6jpwld 438)qhnf:7zinserted?

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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 charged. Tcpt wf8ymq-6 ,he battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a 6-c,tfw8 ypmq dielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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