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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 following is n3l(unzga4a , o2yk9i c6xo3ki ot 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 a2s,l +no 1uzgq

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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. O,t l,( oav1vfebject A has a net charge of excess electrons. Object B iot(e 1fa,vv, ls grounded. 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 the direction of thehiyb4 hj-q(5 u 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 to the electric fiel 6 ki7kp8:ksipp84kt wd

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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 holl( uxiwmr * 8efq/4ckv:ow 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 speed v by :0vtai3*b6)g owqtay a 500 V potential difference. If the potential dt)w: ab3gyvota* 6qi0ifference 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 potentiav.d :vur3ee; al 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 poi e:nzw 3 jj2;vtea74cruk)w *gnt A to point B along an equipotential surfacegrju: ;e*w c)v a37enzk4 t2wj.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfacel4 b g9+-d ,hrlv -aqjgw8h f-+*frvuk 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 carryingmps99q(:pz8mh/ap-.es,uai j xs6j c a charge equal to that on the electron as a result of moving through a potential differ pqemc sm6s pa9 jai/-8supjhx :9,.z(ence 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 un;7glqu.dt3 o dit 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 correspondj tpd*rit2mker/ 7/ f(s 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 r53h)i ke e*pgoiz+ ;cfrom a positive point charge is 100 V. What is the absolute potential 4.0 m away from the;3 5+z)hcpgrkei ei*o 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 cho c*:cdg0kpg: arge is -100 V. What is the absolute potent :k:g0*pdocc gial 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 x- jloe l,/r. ptoz0n(at the exact 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 alor n/ -.ext,zo0lpj( bsolute 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 of8v1ejp wqfp1gx bdt5*q .wpp q84+x5q a square is 3.0 V when a charge of +Q is locaqpgf*.wvb11 5de xpp 8pqjqqt 48+x5wted 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 are*c8h,xl ag hh,

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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)036w+yp mwdi efl(xa is 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 one h2r0v7xxte ,z- p1z yjhas twice the plate ar e, zv10 t7-xp2jyzxhrea of the other. 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 capacitance of C. If the are*4ln( ok-eus ia of the plates is doubled and the distance between the plates is halved, wh-ku*en 4o i(slat 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. Th+cdcf(rl , tmw)o8zc.e plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remaint d)fc8lmoc ,rcz (+w.s 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 ofx jn ku4p)-fp. a given capacitor is weakened, the capacitance of that cap 4fp uj-p.nxk)acitor

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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 maintainedxw/ 3a:j7pd j(-1c wp edtsj/j with constant voltage by a batteryx:dw71(e jc3/p-sw/j p djjat as they are pulled apart. 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-plavi036 )qk x0 zkr2fse1r(xwvk te capacitor are maintained with constant voltage by a battery as they are pulled apart. Whw k 2k0r0sv)i3e(1 rf6 zxqxvkat 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 the6 327oup tb0 misiw3fr plates of a capf32wt7ibspi ro603umacitor.
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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 between0znt: +h 8b2ti/id dqn the plates of a capacitor. What happens to thn+hdt b/02diqi tz:8 ne 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 pl2f2mdq. gk fk/o*o 0ifaced between the plates of a capacitor holding a fixed charge. f*m g2.0fdok fko/ 2qi 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 h*fw1knbh,o)qi ltak p/b7) 6connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between tnk1ihhow 7,q)l bat6/k *fbp)he 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 consty pszb v0he3 ,4zba*n4ant charge causes the energy stored in t4vpb3z ezb ny*,a4hs0hat 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 c .uj 0xmt4 t)b+yr7qub *scr5utl+y0pauses the energy stored in that cact+0by4y5qpuuj.u)lx tr7bt rs +0*mpacitor 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 tl m 2k 3ue ub:ro779p.(kgcfiao move 10 C of charge from point A to point B. What is the potential difference between points A and7fbl(i2 c7upg9 kue3 :.arkmo 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, whki g*0v:ywqg+0h j8wgr t0 m4qere the potential is -50 V, to point B, where the potential isg ggrqwtvi+ k80*jm4w0h0:q y +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 ax94clf4,bbxh:g7lwm-b g4h kccelerated through an electric potential difference of 500 V. What is the kinetic energy of the protonbl4lc4m:9xghbw h-g k, 4b7 xf?

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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 e2to,y( t5ff;fape :t)h, esu blectric potential difference of 500 b ;ufea,:ftfo) yt,2ts (h e5pV. What 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 poten m)udansbw4d9a*zh)8 .i;ojba q2dq/tial difference of 1200 V. What speed do;zoj* / d)aadi qsa)mhu4. 8q 9dn2wbbes 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 9.0a-bz/ tur3n6 v 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 x rcr:f )/0supx3vg1 h onm,6pthrough a potential difference of 500 V. What is the velocity of the electron 0:rfx/h63) 1n mpvrspgcux,o 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 r+a ry tw7 emh3+u:at/1fkbrl ms88kij t)r38x est through a potential difference, and afterward the ball is moving at 2.0 m/sa:rms7tfl8rtb338yiatk + 1ew+u xrk mjh /8). 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 betwe6q1nm m9j acw;r e6fly4viz;q5gv,f8en two parallel metal plates separated by 1.0 mm. Wg wrf8 ymn;9 6c,f;mq65i4 1jveal qvzhat 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 magnitud, 1tgf4/ev gq-1om gpse of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 sg -vtmoqgf4 ge/1,p1V, 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 electric field of 50 N/C directed toward the east. Ifv 7j bq*(k)mpn the voltage measured relative to ground at a gi(mkpq)* 7bvjn ven point is 80 V, 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 magn :n9t :t)rd3mtb,dtca cq4f9vitude 3.0 t9 d4tbd)cttn,3qvfcma:9: rV/m. What 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 0.20 m, are connected to a rmys (4fmq 3omi8f tnp)2xk. )12-V battery. An electron released from rest at a location 0.10 m fro)3(xr2m48. ysfmfmqi) nkt opm the negative 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-V7-iizqszro2 -sa x 0up)v6w6l battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives atz lsq-rvuzwsap)x- o667i02i 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 connec1*zmp 28j q vpd1ggi(lted to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electrpl8(12im ggvjzpq*d 1on arrives 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 directed towardcvey156qsl vih:*o 4gy /s8me the east. If the voltage measured relative to ground at a 4 sqvogiy e58e l:hc 6sy*/m1vgiven 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 the east. b nh3a6eo h/s; If the voltage measured relative to3; bho h/sen6a 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 potential difference of 12 V, it will acgv0fu91l,m +btk8pduquire a kinetic energy (in the absence ofk+tu01p9fl b 8uvm, dg 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 atrhlhaz *j 6bp2:v9x2 q 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 stick. Find the elect gir,a646nwd6 :rkn zmrical potential for the center of the meter stick.dg6zmrn:i6r n4ka, 6w

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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 mqaqt-)lleo:6z0x nbr-q 14kd -+0w kympow8g , 0). If the potential is taken to be zero at infinity, what is the electric potential atk-6b :+ dm0tqoyp gak1w-q80qzx-r )l4leo wn 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 poadgv8/ -sy, zqtential is taken to be zero at infinity, what is the electric p8 ,v/ga-yzqd sotential 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 p;zp(;y:j (*ennw ;f*,n6mmfrmdmasm -(qud). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC cha -pf,e qn uf a;mmmr*;symz(* 6(:mnn;dd(jw prge 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 rectangleb :dqppis3(j+8z ,fa w of sides a and b. Whatwfsj+pbq(:d 8 ap 3zi, is the potential at the center of 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. Charges of +4.0 mC are placed in two diag/j br )uh2s.kyonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is the absolute potential ihkrub 2/s .y)jn 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 +2e, t)y4yuyit)n*a8 3 cezmass $6.64 \times 10^{-27} \; kg$) 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, al4 za.0o0k:l pdv pqbdm5pk/xkx)9 nfwb,1*ot the corners of an equilateral triankl.qp op*4wk km/bx,a:9x bf 0n10lo z5dpdv)gle 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 capacf)mm xf3s wt ue bv4a m4yn+r*b./;5lzitor when it is charged to 100 V?5bbafs m4lnyw u;x zr.tf+m4) e*/v3m

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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 1qy/cz 38o25 bixoaga 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 plesoehbb .3 +;ytgz+d( kaq*9cates are separated by 0.s+ b gqbt3.*e(;d+hkazcy e9 o050 mm. If 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 ar7420my dg as8hzj0tnsea $0.20 \; m^{2}$ 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 capacik(nfkqmt66wptji.v o* hw1 92tor has a 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 between thej*1(.nt k6ftvq 6h2m9w k pwoi 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 c, ghw.ysazflh.. n6 y8:sizz43kd4:c yglz)ponnected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remained connected during the procg nzsyd:yl3z.s:,zpiylgh.) 84f k wh. 4c6zaess?

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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. Hzk)h(z29 romgow much energy is stored in 2kh(9rzmg z)othe 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 a 15 mF capacitor. What is the energy stored in the s hfrftew 88;4capac4f w ht;f8r8esitor?

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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 key45k 2y9lwt 1p0 g,g7wi wxythe plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capacitowtyp i9gwl y574,12egwkyk 0xr?

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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 lms 5kh6*qo5jis charged 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 plaqv5 qi5 kb:l6btes 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 arex-cqbb y 1;s):bdi1e ya $1.5 \times 10^{-4} \; m^{2}$ 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 of area *p+ zsax +: b,so 31/vu pu6ygjzt1gqy$1.5 \times 10^{-4} \; m^{2}$ 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 winx ih0nc7 px+8n0r ;vsth 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 constru;r4 itl9f hcc4cted 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 de+oz.b.o 0qhb *8ssicharged. 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 so+bb i.h.*qdso0e8 z 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 becomes fully charged. Th+ wqk:a;*6ue gof(1au z9z leye 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 voltage across the capacitor's plates after the slab is inserted?9gqu* : au; 1+awkz6lof (eyze

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