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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 at+deut 3b:, q:u1rm n;xwg4zfz*:niy 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 isum3w4q8ppxpx1. vde5n zhf( 6 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 surh,q; 4s z8ab: qfvutl)roundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potenbv:lqq)s hu4f 8;zta,tial?

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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 electr o:uxbmnwc j)uu (1xrsdh1ix0 :92r4 lic 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 direcjk7scaq g6 q)u)w*h y,5jbui3tion 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 px9k5tokkem90kd2 j .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 accelerated from rest to a spopscs08v* ueyvi953 deed v by a 500 V potential differed 80e 3vu*ocsp9i5vsynce. 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 referred tof-ae 24moytgk9gcq ;n5b 4j5r 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 b8/ 0s f7 diuims ef4w9;.ejvymoved from point A to point B along an equipotential surface.md9esyfbivfj e.0;7u/swi 4 8

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mosjw2/r;8;js yfi)m37qte cgust 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 thatqija+f/.i ittnk*2 cc5t f he 7s*,9pp on the electron as a result of moving through a potential difference of one vok,9p. scj+pat*2 f i htint/ q5ef7ic*lt 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 o.h.i:rnln8ojv9 hs 5 xf

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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 t z kiyf3je:y6.o

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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 kn* nl o1e4 p rwrf;cs.9y/f8zis 100 V. What is the absolute potential 4.0 m away from t;l nkwcs8.erf49z/rn*y1 fpohe 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 charge is wrn4 62r. :raoktfs2l -100 V. What is the absolute potential 4.0 lf rwt:rs262konar4.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 sqg9 ri1si5 (wrluare 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 othe95iwr sgl1ir(r 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 tdcr(esiy5w 6ofc4 l27 he 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 (cf6s7o2 cy w5lie d4rwhen 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 thatxwmez oej 6w(t;;2q irpjho,(+ce/; f 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 a34x95fyqc3b tu,xh;y kj7zt+c)t7p)xt nad h

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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 evg+p),y/h46tg ynk- c bjmvsr0ery respect except that one has twice the plate area of the other. If the smaller capacitog6njmbt cp/g04hvy,y+s kr - )r 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 thy p, +fvqtt h0lgek /9t)bw0c5e area of the plates is doubled and the distance, /0y 9hkt0)f q5v tcb+lwpgte between 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 and12quu.x 92dnacw* (,lyq cw lz 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 the potential difference bet w2zcqa1u9d2xu lycwln.*(,q ween 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 weakenel/xsqi*t( 1 vqd, the capacitance of thatl v(1t*/s iqqx 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 constantxkgzla uto-7.4j gb23)ykj f; voltage by a battery as they are pulled apart fuj7goaz-.ybk 3tgk4;x 2lj). During this process, the 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-plat7lwoq 2wxe3) t nke,h9(e,ctu8gl1x re capacitor are maintained with constant voltage by a battery as they are plr(lhx1t7,o2,ukc9 egx3enwwte8 )qulled apart. What 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 materyb * w8 uq5s3meyflt/ nio+n3-ial between the plates of a capacit3 q t l3se/yf8bnn-*u5ymwo+ ior.
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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 plkf-6n5 0 ilkckates of a capacitor. What happenc50k k6-knilfs 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 o f(e m 6 ;nlhzg6vwzu6fvkf4fn,o288mf a capacitor hom 6zm lvwv 8u28ofgf6nnh(e4 ;f6zk, flding a 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 a7l/j:t)rg s f3v5goqc nd becomes fully charged. The r)g5:3 s7/vtcgfoql jcapacitor 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 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 capacitanc a ;0a:/6uyihmww v/sye of a capacitor holding a constant charge causes the energy stored in that capacitor t6:sy/ 0vmi ww/;ayahuo

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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 give0 5 t/ .alf)te)ashhsfn capacitor causes the energy stored in that capach a f50e tshft/)sl.a)itor 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 gz e g;y3ecg+910 C of charge from point A to point B. What is the potential difference between points A andg+gy9;3z ee gc 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 p +,o)zy v3hqxpoint A, where the potential is -50 V, to pointoh)x,pqy3 + zv 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 8a 0ky/f/vzvijj9kc -c zql38through an electric potential differencq8/ fackzv- kyzj/lc0ij8 93v e of 500 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 accelerated through an electi8-e q( vwm0jcbr0d4+ u0jib qric potential difference of 500 V. What is theej8br 00i0 jwuiv(m +q4c-qdb 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 1hiet 3r:g 3s( 2j-rcpo200 V. What spr(ts2gh-o:3i rc jp e3eed 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 moving v43ezchag( z5612tgiyq niv;$8.5 \times 10^{18} \; electrons$?

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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 aca0i4+plz s1fj; zsq6jcelerated through a potential difference of 500 V. What is the velocity of the electron aftefz;6 1 s04apsij+q zljrward?

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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 m7rwygvtf(o 0uj33p .gnr ;u-g C. The object is accelerated from rest through a potential difference, and afterjv3oru7tg0p.rnu w yg f(; g-3ward 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 betw *h l-(lv07 zjadejq wgd6t;6ween two parallel metal plates separated by 1 6l(-dj7w;valdew0tq 6h zjg* .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 500 V/m, is directed parallel to bp qb2dj: /d,rthe +x axis. If the potential at x = 5.0 m is 2500 V, wha2qd/, r:jbp dbt 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 elw u-,pwhg3w-ikkb -)vectric 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 a point 1.0 m directly west of that poin),b3gp-ihku - wk w-wvt?

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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 ma71v 3/ m :frwpuvv-n3rcp ktr(gnitude 3.0 V/m. What is the change in kinetic 3cpu/- tr3fvr:r vv7wk n(1mpenergy 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 connected to a -f:zg5;vn ey* ,jiu wh12-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 f,eiuv - ywzjn;*5h:gm 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 battlw*i slh7nb o.b h0s74ery. An electron released from rest sw 7lsb07*hb4 oln.ihat 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 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 connect6 umq3428qljrl nan;ged 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 positiv4mu6n ql283ljn;agqre 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 toward the e 6+s8vvgr0 92 ltgxloki-8f ezast. If the voltage measured relative to ground at a given point inz x g f8 li+l2e-kogvsr068vt9 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 ep3veugxbm *4 dg2*x2g)tua4toward the east. If the voltage meat2gmae)*eg u*4u4d 2xp vxbg 3sured 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 potential3vx,:t:/nr nh2io fit 0gs .mmu9nm)h difference of 12 V, it will acquire a kinetic energy (in the absence of friction)hn3mm/n i .0ts:g )ti:xm vn9,h2rofu 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 potentia)y0 x,q poz5dzl at 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 use( axj1:ewsn/pp*t oi+-t(are at the ends of a meter stick. Find the electrical potential fos+spt:oeue-tx1aj p(n (/ *wir 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).qqohenhth.akp v8l ;)8g/ 5-e If the potential is taken to be zero at infinity, what i5hqg eove;q k-8 .t h/8nal)phs 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 the pojci)0f:j 1jf k11pegh ( v4nnytential is taken to be zero ejjhp1(1ykvn)1 4fj:cn igf0 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 c+zu/gp5dy/dr 0q fm teub/py1v+pz.9harge is at (3.0 m, 0). If the potential is taken to be zero a0 5p+ ygfr 91.dzyepzb/d+/tvm p/uqu t 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 placi6t:5chiku 8zed at the corners of a rectangle 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 b = 4.5ci:t8k zu6ih 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. Chargevbkd- n;ne h hyps2b opk5-1.;s of +4.0 mC are placed in two diagonally opposite k2bdy vhpsonk;.-pe-;1nb h5 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 (chargejarb-7dqmz) -k*g0n-c ;licw +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, eachhijx +jnzfk0f) ;i2d l+ .3zry of 2.0 mC, at the corners of an equilatizj r3zx+k2fi hl.j+; ) df0yneral 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 *k5xfwq9 ipj *the plates of a 2.0-mF capacitor when it is charged to 10q fp5wkx**j9 i0 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 capac.mbdlo iw rj-4w5wt6/- u - q5o3lbvuritor 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 with air, and the plates are sepm2b* )mxt5cl 1iqzl5 t/:ihlnpc)f (carated by 0.050 mm. If the capaci1i l5m(p 5nt/2l)c c:h qzixl)cbtf* mtance 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 capacit1p/pevg * ffeqt6 q,1jor 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 ofc;y4n a:0rq i /o731pju,b wiy xm0xix 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at yjo; 34ax,b:q0cump iiinx 0/ 1 7wxrythe 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. Aftnwpr2 uh2i1n yl-tb- ;er the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4lyn2hr;w2uipt- b 1 n-.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 eners3-pgdpc3k0 dgy is stored in the capacitor?p-3ckg 0sd3dp

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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 czifb l;u t zfa046vl-1apacitor. What is the energy stored in the capacit;16 -l0tfluvifb4a zz 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 pox*.+vrd j.rpf +sqnx: 2z f9hlates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capaciton 2f*dq9 zxrr oxf+.js:hvp.+ r?

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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 thako5t /i//phd+*doak v(u j/ap t 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 oi wax+s7df.bt9 ac*fhjk h*ymw16b.3f 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 capfdg -a1/h /ottacitor 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 con;mh)8 eshmpcd-ioj 6y .g3o ljako3*0 sists 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 im- +3hw6hptrw s constructed 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 capadct -/wxy3j 4wcitor is constructed 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 fully cha :m x d,boxvo2ky1p,z2rged. 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 oxbv1:z 2ok,m p,2x oydf 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 becomes fulqbk,4i)rejb 1 ee* oa5ly charged. The battery ij k5b)o4ea1e, *b eirqs 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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