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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 7*0jqzlnkt z *is not 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 z6gny6i- s82m9wsrs fyxw/;da

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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 insulatb m(ia03-*yxqx6 b)beo q yk7ted from their surroundings. Object A has a net cqxb ai6yb(3*ybqo0 emx7t)k -harge of excess electrons. 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 direc6oqr8)x5bsh) tx: li htion 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 electric fieo6e3p +i gfz qm+)*anbld

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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 conduct 0zbhhq .*xld)ing 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 fc(+ lrbz;.5hgij xv s2rom rest to a speed v by a 500 V potential difference. If + g v5z;c.x(jisrl2bhthe 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 to asjx2 h/j42r zlb

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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 egir*tnun 0:4bquipotential surface.:nut4r i0g*bn

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mu jmxl p fl*g )-w157td2xkjp3nst 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 carryifh ,cd;8e .rxlii ;y5eng a charge equal to that on the electron as a result of moving through a potential di5cy,lrxe;idh;fe 8.ifference 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 ;t 8ek qg :44ywzqk0xza 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 co .e2t: nqp1s+ * 4pjdfgpdjr bb6qk3w/rresponds 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 positxm8z.sr 3 ek;noh:k n,ive point charge is 100 V. What is the absolute potential 4.0 m away from the samnmr;z38 x nokks,:e.he 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 disfvm,5moho,h0b zo) m0 tance of 2.0 m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from 5,bhmf,z00mooo hvm) 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 cen/na9- v,xrjrh 85alhtpwx1v 3 ter of a square is 3.0 V when a charge of +Q is located at r8n3/v xap,-thlv1ah x rw9j5one of the 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(mr2boykk-jq-8m 8;kc :g f uh the center of a square is 3.0 V when a charge of +Q is located at one of the squa-b ;jhc:kq-kmuk (mrf88o2y gre'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 are3g t3hw 4qbtk0.ec6pv

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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./ynowcxua m3 t*5m fvm7)-ya

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate caxz2bbpq8iew4mn z) 6 1pacitors are identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger on )zwbnq8 imp2 ze6x14be 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 capacis*-28y4tmkgj r m0w+6jp7 z vlue0qko(vclc) tance of C. If the area of the plates is doubled and the distance betwe6llv4-wo v*(tz7cmpjekq 8r m 00 ygsjuk+c2)en 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 and then ib qn3ub;,m8wvv+u8 ffqsw; 2xs removed. The plates are immediately pulled apart. (With the battery disconnn b;xm,w2vw8s;q3uqu+ fbv 8 fected, 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 in7 *c3puy+g1 wo1qqo.u5yi ems weakened, the capacitance of tho53o uui ycq7 n +gpew.m11y*qat 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-p7h/ 6iejz,ia llate capacitor are maintained with constant voltage by a battery as they are pulled apart. During thisaj7ez /6iil,h 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 consz uzo80./e7wdbn xewll g9:e 2tant voltage by a battery as they are pulled apart. What hap: bew70no.dgxu2e9zz/e l8 lwpens 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 dieapj.)x-x s.2ybgz9qr lectric material between the plates of a capacitos. .j-pxqy9gxra) b z2r.
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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 as05bd/a de 7 0kyvjwg1b6ppy /q paper is placed between the plates of a capacitor. What happens to the b60p7wvbk /ydea0qy dg5pj /1 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 of a ey;k;+z6 h5: nma kvnlcapacitor holding a fixed chz:n; le5h6a;k+ykm n varge. 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 connz-ytx jh9zpp( 1jpefou5*/ g:ected 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 chapgp9o x*hz(u5-fty:e j/p1 jzrge 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 causes vqs 1yrvya+4/the energy stored in that capa vqys1y/ra4 +vcitor 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 acros-qdcb78j3 tlk+ yu2 zss a given capacitor causes the energy stored in that capkbduj-lz+y7 3q8cs2t acitor 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 frdq evu -r9 cb,hjyn12;om point A to point B. What is the potential difference between points 1,en hyrbu92vjdcq; -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 g8;1 (bl f5bxqzh6v9 zh-bd xnpoint A, where the potential is -50 V, to point B, where the potential is +50 V, b8hd6 z z9 hfqxbxl1-5bgv;n (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 k 6io t;unhs:1an electric potential difference of 500 V. What iukt :;so1 ihn6s 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 electric potential diffdcb r9mwdu-d)h;rg b2x +(i :ference of 500 V.gdfrmdbrb u :+ 2;d9(-x)c hwi 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 pz2irt0umhw-cjw y4;2dd f5g ;roton falls through a potential difference of 1200 V. What0 i;y2fd-g2 drujh 4cwz5; wmt speed 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 m7g4, 3xp qrz;losw5msoving $8.5 \times 10^{18} \; electrons$?

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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 d :hdnlwf;ds/vjsy/)y2aj;s- ifference of 500 V. What is the velocity of the electr)dj / lshs- jw:n;yv2 /fyad;son 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 carrie)v1gb plij;l4- l*gm 8h+qsw w 4x6orms a charge of 20 mC. The object is accelerated from rest through a potentia*4q smjoll8 4m1-h+rxp g6gb lv;)wi wl difference, 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 u )fo7nvdcoy f5c9g*:sz( 2cq/hsl)c potential difference between two parallel metal plates separated by*zosdu)y5 ccgc 7f nq(f92o/scl:h v ) 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 fle, a )jazad)) ,6xyuoh2+ itdield, with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potenti at) y,+adx ) eiuzl,d6j)oha2al at x = 5.0 m 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 diooh9 8gn i l(al.0hj8rrected toward the east. If the voltage measuredh9lln i(ghr08 o8.joa relative 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 along the direction of an electric field of magnit:k0p )s)6lm -su0 q4uneam*pkg.dpltude 3.0 V/m. What is the change in kinetic energy of the.) qmt ls4 pemsd*u) -g6an:k plup00k 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 con6 -n,8cegn86 x p+/vhgj ooypknected to a 12-V battery. An electron 6xj+nh gepg v/n 86,p8-co koyreleased from rest at a location 0.10 m from 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 conno yue.iutj ;to4n(u 4y 3i*n.rected 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 positive plate, how much kin3tr (4nuuoetu njyi. y. i4o;*etic 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 batter-i,y)sfru si u2-0xg ty. 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 froisgfxyur-)- 2i0s ,tum 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 electri7b -+gozs m31dz9cbzcnlh( 9lc field of 50 N/C directed toward the east. If the voltage measured relative to ground at a given poi-zl+c9 o(d 9sbz3bn1h g7clmznt 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 odt f+hz2welsn:+i -8 nf 50 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 1.0 m directly south oflz+n+e: wi fhnd 8s2-t 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 wwxy(w 2r *nab81r/a sdifference of 12 V, it will acquire a kinetic energy (in ths* w2bray wa1n /8rwx(e 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 at a c5,9tz,;hkfuifo+ e.wj/; uxs a ;roldistance 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 electrical pomym(t,z / cuh/tential for the center ohmz(y ,ctm/u /f 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.j dkeo8xmh :1)0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at point (0,m1d e:)khj x8o 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 chg1zf6f -ooy3uarge is at (3.0 m, 0). If the potential is taken to be zero at infini6o-of u1z gy3fty, 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 up1sm9 z 2nxz5(0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is zspmn 12u9 zx5taken to be 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 corne) 00buj xn;l- p;fifeqrs 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 cfnjxei0 b pfl;u; q-)0m, 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 sid2q t/no r7 (x4eo d/8)xggcbnke. Charges of +4.0 mC are placed in two diagonally opposite corxtr/c n doq) g(kg4n7x8/o be2ners. 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 (charge +2e, masst5eoi.( jyg s35- g scxhmddkmw--7)o $6.64 \times 10^{-27} \; kg$) 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 n ioilje 4(59dgk-l /ftecessary to place three charges, each of 2.0 mC, at the corners of an equilateraf 5-gol9l4edt(ik /j il 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 thee lqr4 nhc: yjwt04d58umv*n4 plates of a 2.0-mF capacitor when it is charged to 100 Vytlr0mh 4w:8c4q 4 j5ndeu *vn?

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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 w jx2p,y:x 3kvhas 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 6ge :w gq()a0gw3 dapfseparated by 0.050 mm. If the capacitance is 17.3 pF,wg(w da eg36fq g0)a:p 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 o9x/o4k7ve ,euncf :vd:e ,bbpf 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 ra:,enlf3b *scm. If the potential difference between the plates is 2000 V, with the top plate at the higher potential, wea b n*f,sr3:lhat 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 connex-vuv8x1b., zyp3 pmhcted across a 100-V battery. After the battery fully charges the capacitoryp-zvp3m.bx1uvh x8, , the capacitor is immersed in transformer oil (dielectric constant = 4.5). 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 energy is srzix4byj a)8 d9w( jj g7 u/sll5+oci)tored in the capaci dj)5i rjw8l) c7zol4(/igxa s+9bjuy tor?

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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 cavbuj1c,xc. +p pacitor. What is the energy stored in the capacitorcv .c,ux j1pb+?

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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 c(9 *8;mu.escf;er*xqpdxgba capacitor when it is connected to a 12.0-V battery. How mucrcg. pe;ex cd 9b(*fsq; *m8uxh 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 2v,c5 nn:,zdydy-s oh8bh7yz 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 ogvkf,v-;15t 1wcoylm f 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 consis,ge9 ncks wn3*ts 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 consistsw st 6)nvxl7o- 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 area ;ay,a5srw(8kt1 up pgof $0.40 \; m^{2}$ 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 i; utumrd27e *rb prf0+h ,xna)s 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 conn1 hvw4p6ps. rgected to a 50-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 the capacitance of the g pr1vs4h6pw.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 charged5a6 g:q/+fwg l7xhdbjjf (iv 2. 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 a2bhwq+ xdaji7 g /f:6l5vfg( jcross the capacitor's plates after the slab is inserted?

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