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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 nx;shg pre: ,j/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 5+i7 9j6grw m hzgpf9pis a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminu.))xi5h: p jpufp4vuwm objects are insulated from their surroundings. Object A has a net charge of excess :fu4hu 5). pix)pwjv pelectrons. Object B is 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 dir:rz)b:c8t6o qz8po;o2nq rfiection 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 to the electri l atd)1bk,d/vc 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 oniwutg x:xtyy4+w:-,8v o x1qpleh ,j7 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 a 8uy-x ak cn,bm(77spgccelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed ofcb ,y(- 7gakmn sp8x7u 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.: digkx4e78bt et f3z 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 equi+x e-xb,q,d.jl6k mkipotential surface.d6kk jqmi.b- ,e,x+ lx

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface bv -kb8foj3vxq.kpc3tg 7 ltmc ./zz( 04uwz. 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 that on the-)n*ej(x/hme,x oh wi4paz5w electron as a result of moving through a potential difference of o(hn x54i), wx*eep zhowja-/mne 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 uni,q)v xvc6*bk 0po2tfht 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 correspondu-fzst-u 3w0 ws 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 p29k8fyam7 cek :ttq +at a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away frea892fpq yckt +mkt7:om the 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 potenti9qzd1) r8w3hoe -ub lg-qwp5hal at a distance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away -u9l)gh1wp5b3-qrwz e dq oh 8from 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 a charge oegz d44fi53t6tw pq +rf +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 corners is also filled 3rizpe6dwq44+t ft5 gwith 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 ox m7+tg.e +1dubq4r):rmcjz*:j ywpy f a square is 3.0 V when a charge of +Q is located at one of the square's corners. 1+d)x* 4mtrezb j:ry:gq.yc 7pw +umj 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 areyp x) - hhdh aygzc,3kt232r5y

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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)rf,nv/z)cyixq p ;0 o

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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 ar p m*,vv3wqm./kpzgv6/5ubry e identical in every respect except that one has tmypzvk*p6 /3b/uv vwm 5g qr,.wice the plate area 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 area of the9d.-ybvd*ba :o/y fxk plates is doubled and the distance between the plates.*y- bxod advbk yf:/9 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 full4f2 4nyzxymd i+d4-qs y 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 the potential difference between the plates as they are beinsn4y2miy xf+44- qdzd g 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 k64dz5 sn+qrigiven capacitor is weakened, the capacitance of that 6+5 zd k4qisnrcapacitor

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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 maintainjma)a97hx g1fed with constant voltage by a battery as they are pulled apamj xa71g 9ah)frt. 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-plate capacitor are maintained with constant voltagetl ta3hdw0s+2,3pl1veh q1je by a battery as they are pulled apart. What happens to the strength of the electric field duringsh +a q edp3,h0tvllwe31t21 j 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 e mc 4l75w 5pgulh0i-wdielectric material between the plates of a capacito5pwu le-w5l4mi0g h7 cr.
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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 th83 jxbxzssf95vkk;- 4w eeu k3e plates of a capacitor. Whaz33vw8;4ex s bk xsfk jku9-e5t happens 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 bet ifeo6 1*jpam,*a8ieyween the plates of a capacitor hole*pa eioj86f,ymia 1 *ding 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 and becomes fully ch0d)b er2sibv:*g 4 hyfarged. The capacitor is then disconnected, and the separation between th)yhib4 rs:2vgfed0 * be 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 constant charge l diwx:0 x5xz8causes the energy stored in thatz x:5w0i8 lxxd 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 capa; w/jzq* cl s,dm ,zm.rqp:ic7citor causes the energy stored in that capacitoqm,wr:zsz;/c, m i*cq.jpl d7r 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 charge from point A to point B. r)c(6 ac y/nbs What is the potential difference(cr 6 na)/bcsy 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 eu 8f6lf aif b,k9nn i48x:p(rolectron from point A, where the potential is -50 V,i 6(:a ixk 9n,u8 ol4fp8fnrbf to point 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 through an eleo5px0htk)-i lvb u:fm8 r7 ligoef;; /ctric potential difference of 500 V. What is the kinetic energy of the ov7p;u5ei08-;og t l)h / bfx:iklrmfproton?

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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 thro0s+ zuvik4yq);kw q +5gaoqce6dt- +j ugh an electric potential difference of 500 V. 4s0 + yq+jv qdaucweko56 q)igkt;z+-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 througpln5/ l.wx7t nh8bvr-4qnhjf1wv 7v, h a potential difference of 1200 V. What speed does it act4vjw nrf7nqhwxv p7/h .bl8nl 1-v ,5quire?

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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 ,lt-op (p yv:hin 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 ut5a*e qh. o pju8*a.ns7,bbwthrough a potential difference of 500 V. What o.hn*utqj,ub paae8.swb7 *5 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 is accelerated from s*0p99qym ql9g8lc qx rest through a potential difference, and afterward the ball is moving at 2.0 m/s. What is the magnitude of the potential dim9ql0* g l8pq9cys9xqfference?

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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 betsy k52ued9 q/bween two parallel metal plates separated by 1.0 mm. What is the electrk5q/9du2 s eybic 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 3m-2lmnav3 lnto the +x axis. If the potential at x = 5.0 mna v2n -3mmll3 is 2500 V, 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 thiqc0 7foj -ad,bc56 zbpn5yy-e east. If the voltage measured reb -aypfc0-yj5 cq, dn6i57zob lative to ground at a given 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 along6.7jvpugj,)f , jc bhk the direction of an electric field of magnitude 3.0 V/m. What is the cj) p6g , h,bv.jucfjk7hange 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 12-V battery. An e8i ifz(ss/kb36w i*jz1tmj)w lectron released from rest at a location 0.10 m from t(6j jksfszb8i/ w 13zw *itm)ihe 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-V bac9e-zo4 h (qh msw ee6z(3hx/tttery. 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 muchzs6 xhq4e3ethc9w ez( - (mo/h 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 bc.g7fhga 3tc:o.)a6f 3qcf szattery. 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 q37cctgaz:s)ff 6fo.ha.3 g c 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 5yfx*c,;9j 7 w7,h*wzxtdxdsc0 N/C directed 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 * j97z,xc,t*sfhddy;xxww7c.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 towardbr7(u6 ;g flsu the east. If the voltage measured relative to ground at a giv( b;gfl6 usur7en 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 l6h s-e(6qpm;dza/x f acquire a kinetic energy (in the absence of friction) sl(x6aqe/-f6 dp zh ;mof

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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 y)9 qcew v*(iy: 5plppat 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 elecpekr;97a t/0x s*ulrvtrical potential for the center of the mete;x70es9avplk * /rturr 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 k 6al8h97agpl.0 m, 0). If the poten87al6lh 9 kpgatial is taken to be zero at infinity, what 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 a -2.0-nC charcxk +8zys*q p5ge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the elect85+z k*sp qxycric 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 gjtbqgjb2/3dh7 h .pbs/ ;0 rsis at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity tobbgq t;bgs 3 0j/7rh.2/s pdhj 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.l(*/pz fvaua placed at the corners of a rectangle of sides a and b. What is the potential atu* vlp(a z/f.a 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.g),no;x4aks s0 mC are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3 k,;a4ns)s xog.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 (charge +2evu )5li.pma6m2i 9// qa8oabatur9zw, 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 the cp2x 1p bujwxo 1s7/sp0orners 1ujsppxo/b1w0 sp 7x2of 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 pla 6r jx,fxjvf0d l9nx 0,jw2/tntes of a 2.0-mF capacitor when it is charged to 100 Vt /9 xlw0 xd2,frjfnj,60jxvn?

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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 plates of aref8 bljo4g gdj91n f25b5s sa9aa $0.50 \; m^{2}$ 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 separated byo7z 2yqv1j8j ;u w ,(yprj6+z4gpivtf 0.050 mm. If the capacitancvjg 7 y62y,1p o+4rztfuijvwj 8(q;pze 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 ofood/a /yi-d0-rlw7re6qq nk8 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 capacq.zebm gg3sf8n- gg/m7q 6b(citor 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 tgc8b-f( geqb./ zgm36n7m qsghe 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 8/v;w+ df(y god5hi aebattery. 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 ;(yhovw+fd85di ea/ gbattery, 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 isy* z0:a6 nli qap5fd3g stored in the ca6q3lg azp: 0f*ain5dy pacitor?

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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 t1:f v+km y 7-czmf zj 4:u;iw-z3lapwche capacit:+afmzyupjv :z4 -li3w;w-mck1f7c zor?

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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 capaciw2 ek qlj zu4:;:ddur.ryv9q.tor when it is connected to a 12d.4y2j lk9zdr w :eu:rvq.qu; .0-V battery. 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 t6em 178)7tcspyd+ 3eri xtbnklcd9/j hat 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 c xtfbx 2 njvxqzv;-3..189 yvtbdfey(onsists 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 capacitor con(f 8w0 rqfhp zl.+:.uhbwl6sp31 / duaju,st fsists 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 platebyse7i*zk;z i* tfk/4s 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 capacinq00 .04ulfhsv zjfuu9 p r3ut5 4frz042qxhator is 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 capacitor is constructed with plate are9cays6oq ao (1za3 dj+a 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 +4bbj1+ mw 3a 5bqfmqs50-V battery and 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 the5 w qbb1fmj3s4mba+ +q 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 fulw5kkpde s4s)f9f+zlh(e). q ply 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 voltage across the capacitor's plates after the slab is insez5 )skhw. ep9peq+s(4ld)kff rted?

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