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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 vector+w fq3fsca3n k:-x) zrud/:zc ao)+ta?

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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 is2a)(swx 4 kcsr 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 theng uxw5/zdo 6;d:a ncc623ganir surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which gaugzxn :56 /cnoca62d;wn3dobject 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 direct7rm+*k,ef ltmlv(+pv2; rqw sion 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 sl t,*p897c abn/ocef 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 / ha f5p7iy6jydpc+m;a hollow 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 is accele el(pr6c g2xq,rated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 6 ercgql ,x2(pV, 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 al-cqo cegzf25 gh8c /2gn(1hvql points 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 +sbj -yt:tt-g an equipotential surfacesj+t- by-t gt:.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfa u7fc6cx+x( gzp p8l9jce 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 byth 1v yf e5b.y/ce0i9q a particle carrying a charge equal to that on the electron as a result of moving through a poeyy h 05b/e1qvf t9i.ctential 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 o3 ks. ycbik(it i,;(wkl86r rhf

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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 -ycd..3oy no ocm 6oe0* hi;any5f ko5to

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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 pmhl;c3vy -*4 npbt6moositive point charge is 100 V. What is the absolute potential 4.0 m away from the sam*; hlp6n3c vo-tm4my be 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 (i5kz4 kwk.1dvu0a cwjrw5t 1a distance of 2.0 m from a negative point charge is -100 V. What za1ik5kww(v .41cwkr0u jd5t is the absolute 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 exact center of a square is 3.0 V when aedyx/ myv aqza2/, 1u0 charge of +Q is located at one of theuad 0,v//1yymx2e zq a square's corners. What is the absolute 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+)xs a ru 9n6b15 re*vci-afkl the 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' vru n*bxsi91ale+-5fr )ac k6s 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 w wwlvd6*wg6am/ +eg6 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 isq-0f g:, ac:zpuj-pzi 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 jzb1pey5 ;ss8h2) sme6j z;tq are identical in every respect except that one has twice the plate area of the other. Ifs)8 s1;spjem qye z5;6jbhtz2 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 of C. If the area of the platek.x.09ybvb/d jti h *es is doubled and the distance between theyejb0i dt h/ 9.*vb.xk 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 removed. Ttii 9 a* ri2,wzar,io* .i1cighe plates are immediately pulled apart. (With the battery disconnecte,g*i act 19r,o2*izr a.iiwiid, 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 weakened, the s47a/5rktyih capacitance/ta7 4is5krhy 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 maintained8;s5 uq v6a q qqhv8ql jl)*t9v1ogpy/ with constant voltage by a battery as they are pulled apart. During this process, t9;tvuq8lq v5 68lqo/1ag *hypqv qj s)he amount of 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 constai 9yy4gtdn.j6 nt voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this pro ityjd.9g6ny 4cess?

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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 plates ok0 v bvq +zq2fp:uhw62(lv)wbf a capacitovh v6qwkfz2+ub) b0qp : (v2lwr.
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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:x3*skhxek s; 9l;wv j)u)jnf capacitor. What hapwxl)hnfj3 svx*jk :s 9);kue ;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 between the hch u , i0:;8r/jimbveplates of a capacitor holding a fixed charge. What happens to the electric field beth um,vc/i 8b: jhie;r0ween 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 capa 0j +z8gdxbs1vcitor is 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.b+0zdg 8 1jvxs 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 caj pi7p1j 76. lospxf (w(lvhn:uses the energy stored in that capafhsjp1j(:i wop(p .6lvnl7x 7citor 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 stovmt8dmd;gnv3tqjng 0 a 6); +dred in that cap68vv mgda0n )tgj; md;qn3d+tacitor 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 ygwm6ej 2 59v j rt1tkrn3jkc. .1g,qwof charge from point A to point B. What is the ptnge 6kwmqk59,312wvt yjj1j g .r.rcotential 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 the potential is -/,l 7iogn -yjk50 V, to point B, where j7y/i,lknog- 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,rq-.6vxli*vs ):z6x bb* f1aqi d0 inw is accelerated through an electric potential difference of 500 V. What is the kinetic faqii:.l-ix*d)vr1b6 * q0 wbn sz6vxenergy 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 z ws8j 7 d5:u yofjxx;i5j-e8lan electric potential difference of 500 V. Wha7dwxjzxyflju:o-8 8 e 5; 5jist 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 1200cs qcb5;3ta3h V. What speed does it acquire3ahsc3c5q bt;?

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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 mov2kw e ch12ts2w 2 gfd-wxcq7a9hvw-;ving $8.5 \times 10^{18} \; electrons$?

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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 thrh pf6m - weepkxegz68k*8xy5)ough a potential difference of 500 V. What is the velocity of the electz8yp85ee -k*hfg 6ke)xm 6xpwron 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;qpxtee 39 lo;. The object is accelerated from rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential diffe3;e9t;o lpx qerence?

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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 potentialmq2+i;sdqc ytzyt q*; +t*sau-(+;w/kqihj z difference between two parallel metal plates separated by 1.0 mm. What is the e *cyw-sq +t(zq;;2t/y z mtu*;+qahqi+sk dijlectric 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 paral( dwsl5 x o edakr81.61hicp8olel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the 8 drocwopd65a81hil x 1k.s(epotential 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 electric1fo x6fyir,.0m 0mcoc 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 vr00miox6fmf 1c .yco,oltage 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 magnitudkag6)s:9x4rr b oxca9 e 3.0 V/m. Whaas9rcg :xab)6r 9xk4ot 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, -oei*.54-yq4xczr3rgal kw4ieoa4 f separated 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 arrive5r*oaqkrla w i4 f44ige3- .eoyc4z -xs 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, separatekko*uwn/ i87t d 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 a8 inuko/k 7w*trrives 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 connected to a 12-V bat gwkl0 s-+(goktery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives atwg- k 0(os+kgl 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 l 3e07:t g. snlmt rjtc7d6o,mqb 6-sodirected 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 directly east of the p6b3jsl67,ods7.gmtln-qc ot0m t: e r oint?

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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 di:w oihrhrr/fjgt2vmn0-l0ak241, l xrected 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 directly south ofr/ ih vk14jha 2 rllgto -0nr,m2wf0:x 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 ak)tio ;o5g, pgcquire a kinetic energy (in,5);i ktggo po 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 a lrhq42wnd*b0t 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 sticu+4r z9)dpnq1) 0 k+qqslkaun49 mh ihk. Find the electrical potential for the center ofz 10i9n)dqq9 hm4rup)ka4u+qk +shn l 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)yya 1il:twy3o ql, .eh9myh33 and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what 1ymat ,:w39l .qeloih 33yyhyis 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 5ad iorfa2od 9bf.7l/ 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 of a 129 /old .ofbdaf57iar .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 (o:) tip/1hew3ec kqmz,rs7 duy rd./60, 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 work required to bring a 1.0eq 1 d3/ezph,mt)dw r:/su.7y ork6ci-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 cork;eia (ku+o+xners of a rectangle of sides a and b. What is the potential at the center ofu(+;a okke xi+ 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. Chargq 2jjn;jol s.ium3v9hwp d*f,( m:*ades of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC apdw ;d ml2*jmuiaqs o( 3*,n9jj.:vhf nd -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 (c a 2g3i3lyf0f ks47*; na d,fgprmq)udharge +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 nece0cn+a((hi z:w yr o6hhssary to place three charges, each of 2.0 mC, at the corners of(nhr(ia6h0y w+och z: 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-m t( o4v*qf53 orcxwlc/F capacitor when it is charged to 100 V*lc c/txr(o5fq4v3 wo?

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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 plts a6mh;5abzf61gh :m ates 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 filjtkp.*ik zi7;aan5a x- fp+v-led with air, and the plates are separated by 0.050 mm. If the capacitance is 17.i p fz-ajnvpa75xk t*ia+.-k;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 hal;sou/2/ud 5km)prqn1is t k5s 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. Ifj4 s pg; bg8zv)jc3di/5 dxc5lguj4 +g the potential difference between the plates is 2000 V, with the top plate at the higher potential, 54jcl zu;g8bj3pg gcv j/dxi4) gs5d+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 coglb,xsu(v y1l;)1v5 np7o lqcnnected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How mu; plb l sovc1 n1(glu)5,yqx7vch 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 store *b;w / ibm/h,pa/jlozd in the capacitor;zh,pmlj//o bi bw a/*?

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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. o hrt*l bzpzshgp7.u:f); (;+edhqz(What is the energy stored in the capacif ;p(hhl * +;.se 7r:h(zgoz bdp)tzuqtor?

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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 su5flw mxro: /m kj0+3dm8 zn*a capacitor when it is connected to a 12.0-V battery. How m8jk/dmwmm:o+z5 3 f ls0xrun* uch 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 c lc1ev+0sa0ayharged 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 capacitor consists of plates of2 .3ccc 7ll;zdvv.8ft)ttkym 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 capacitoq7-zo6am)1: jqp+hb vtxzayu7+ vbk3r 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 coh*rqfk-+j, kg nsists 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 c*rj*qk;bqh 7monstructed 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 constructed withm,9z1sqb me- g(c1ioi 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 becoz :6n(e6 sc+l.rqpnonmes fully charged. The battery is removed and a slab of dielectric that complec (+on qe:6snn rlpz6.tely 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 becom qd*kr2s;m4y.vxap -bes fully charged. The battery isra.2km;vdpbq*y 4s -x 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 voltage across the capacitor's plates after the slab is inserted?

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