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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: 游客未登录  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 vecto*ia s 832m/fnz9 cjbfrr?

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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 0stosgv sqrwg a.56;/is 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 theun b38t) rtkx*ir surroundings. Object A has a net charge of excess electn8ut x*3)rktb rons. 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 g)zqxp 1-7p)v7hxhk a the direction 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 movingb yeq5 f2aj5co my5n)q +-w(og in a 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 a hollow conducting sphere. f+u5pfcn6(6g)+q:2k 0n nz oc xrvhegThey

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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 1i zbdbd55j -o3l ct0p zsbzb r(pp)-2by a 500 V potential difference. If the-ibl5 cjp0z)dbbt2d-1(z b z rpo53s p 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 refercyul7q.s (1 8 psu3:qsneo7 hqred 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 9zvk;;lw .jp/m6yt xtpoint A to point B along an equipotential surfac;ykzmt.lv96;/jp x twe.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface must bljh0v -t4 b+nke

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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 ca5wyjm(.h2d hp rrying a charge equal to that on the electron as a result of moving through a potential difference o y2w 5hpdj(hm.f 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 isvm k,9i1l0bm hfglantv ,0 vgn-y586 o a 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 corresprt:g0 ng,5heuonds 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 posit,wu ;wr,it ffl2iyg-80bli. nive point charge is 100 V. Wy u;ilwl fbi- wgitn8r, f,2.0hat is the absolute potential 4.0 m away from 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 potential at a distance of 2.0 m from a negativosgfc4gy 03(oe point charge is -100 V. What is the absolute potential 4.0 s43og0 oc( fgym 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 a cqv cz.v9 y8i:vharge of +Q is located at one of the squarviq .v vc9y8z:e'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 the center of a square is 2el vhnq-x() 5q/c:80sjwphjy o :noa3.0 V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square8jsy:qqonv jlp5(/ex)a wo 2nh: c-h0'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 tw6 wge3aijw2c: 6 a mau8frieoug:mf). ;h 51hyo 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 is r5vymc ne-ew7d,c ur/7tvcmrg8+hedpt ;;)9 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 -wo,j,dt1t c2vi1tv/j v vbtt; s/x(qone has twice the plate area of the other. If the smaller capacitor has capacitance C, the largsw12/vvdt/o (,jtv v;q-btjtc1i x,ter 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 hp0ekkm, pz5 bs3 s1p c04)ypynas a capacitance of C. If the area of the plates is doubl py mpzk ybe4 )sns3pp5k0,c10ed and the distance 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 capac y2 2xz6)etuasitor fully 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 a62 2sztuaey x)re 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/0/abn ef 9nxbauxg 6- given capacitor is weakened, the capacitance of that capacitaebb90a fn6x/ugn / x-or

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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 para5 qnum2c:.y 8ffla iz9llel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on t8n2c qy5f9f mi:az u.lhe 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 s/1wvna e*b,omaintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this pro/s woe,a nv1b*cess?

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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 of a 3:pdj- civ,j ng;p :wxxlalth2q2a: 5 capac gvnpja, :wt il5:jhp3q:;x2-cal2dxitor.
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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 thefgq5 gid/.r.5 izkh dv0q6(qe ijuq:0 plates of a capacitor. What hvqd0(h50.:g .e56/fju qzd iq iigrkqappens 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 plate-/n p h2jl */ypc5nacps of a capacitor holdin-nc/p/*5y cpph2jl na g 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 char ejie 5jj cpwdjons61(g9)j 0wa9(z 9hged. The capacitor is then disconnected, and the separation between the plat d hip)j9j16s 9ceoj5w(j90n ze(gajwes 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 holdingoves42c :m oy0iyj. *f:hku- ss*atd6 a constant charge causes the ene4svt c *:*ok- y:fi6udyhaeso20m js.rgy stored in that 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 acrov0joa forn*7- ss a given capacitor causes the energy stored in that capacitor vo j*70-anfroto

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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. Whatbac)zfmc4 ub1 1 9mm+ao0 tdo5 is the potential difference between t o4 )d5 mc+fm01amu91obzbca 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+vas *.gp3u vr8p)/ibl5ahsi eh 17kx from point A, where the potential is -50 V, to point B, where the potential x eg *s7ia. r13v+ih)b spulh/pka 5v8is +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,8iwrihuf5x m5y(,oxx k7i a2 through an electric potential difference of 500 V. What is the kineticr 2,75mwiyi,a8u xxk x( hf5oi 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 elect2 9y3o+f1lgukvzj*bu mwc+(h ric potential difference of 50gw obj 9vfy(1uz+u2 c*+hl3m k0 V. 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 ab r68 73qn2vmk h,vsncg+gk *p potential difference of 1200 V. What speed does it abqn2vg nr k *msvc8pgh,37+k6 cquire?

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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 jf53gh 8bp dni6bx2je8(e3 c hdo 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 through a potential dif;jgmoxgoc00c-r vbdd 2 /yrg7b9 1yoxd)+q1 lference of 500 V. What is the velocity of the electron afterwarcoryb- 9g1 /rd0ob 0x;y2 m1dq7)o g+lj gxvdcd?

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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 cx * b6owcv+4dhh.x(y charge of 20 mC. 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 potentia6 voy4 dbh*c+.wx(xchl 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 t9y pp r.mqig1g/5g1txns8jj9 he electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electricp.8ys rpjg 5qg9jx9nt m i11g/ 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,fu2 ao ,dm66eh is directed parallel to the +x axis. If the potential at x = 5.0 m is e662 hudmf ao,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 toward56cvpi2syh x2h/6 nhn 5b e(qa the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at5q 2 (v b2ixhne6 nahs/pc6h5y 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 magnitude avx: rnmelw;yn3adw 0,de77b+f9r w *3.0 V/m. What is the change in kinetic energy,y07n b:f9 mwe*wlw3e;rxaan+7v ddr 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 fw7q2kb i)gie;s4h7q 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 1.50 m from the positive plate, what is the potential difference i77k eq2;4hi) bfqsgwbetween 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 tpx ez nz6, (ozl-q)) r93rlzbdo a 12-V battery. An electron released from rest at a location 0.10 m from the negative plat3lq (lzo9rxz,z be)d z-) rpn6e. 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 ui)p9 z 7n)x7 lgckxs/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. znuxgsi cp)7l/k )9x7 When the electron 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 b9dm ht: m9e2gfield of 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 east 2bdmhe9g 9tm: 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 diwaw o kj/o .:3 pz902i qvgx,bnmq4ep:rected toward the east. If the voltage measured relative to ground at a give m:o2wvgo.9:jpkw3qe/iba , xq4 np z0n 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,: xy c;ypibyh+40heu, it will acquire a kinetic energy (in the absence of frichi,;eyp b4uy c+:yhx 0tion) 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 a6d:9ek5d*qck br l ay2t 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 3o:b39 dx lqj 2 uljv-y.lmgw)the ends of a meter stick. Find the electrical potential for the center of the meter l:l2g xl 9jjyo.b3v3)qmd- uwstick.

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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). If the poteu1a0cz c7qga/4 ;cx:sce6tp j ntial itj17u6 cc4 ca: ;cesqg/ax0zps 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 chatt8. v yov gcq1c1pu54rge is at (3.0 m, 0). If the potential is taken to be zero at infinc1 y vt14qpgv .85tcuoity, 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, s-z8w(00ke 1 adbu gkz0) 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 requir8 z0u(z10 dkgwba-seked 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 plab 9k +jkkpz.(z.9md0pk ,/nicu s ya4rced 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..9 r9 zpub+sadc,n40/. kypkkkjzi m (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 diagonc5j.zh9; y*ml jjhgb .2vx 04cdy(ph nally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is txg0myl . c49z;ncv.d5h2jjhp(j *yhbhe 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,kork . k77pu7 2vr x6jzh7+9 uyiizw0h 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 thmz ex ;* u+.b6twh+v ,iit3- mdb7vimae cornersm ;b7ixihm+z3tu bvt-a .i6v+em *wd, of 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-mF capacitor when it is charged to 10a;;)3vjg odsb3 );o a;vbsgjd0 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 capacitor h octe vmp1oy*x+ qo-:8as 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 oxo-8 8 vinkv3with air, and the plates are separated by 0.050 mm. If the capacitance 3v8 i -xkvo8nois 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 ucgc wg+:(k3n 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 a ma2obh59,wwseparation of 5.0 cm. If the potential difference between the plates is 20009 hw52amawo ,b V, with the top plate at the 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. Afk;iz0c z:rwn g7 7wb)wter the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional chai0nw7zc :7bw;wzrg k)rge 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 energ70 neviz:2g bey is stored in then:b v7gi0eez2 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. lf( 8m0ycvgh6What is the energy stored in the capacitvhg y8l6cm0(for?

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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 capacitor when it is conne4x;j0kd ; q opl3(oqour*wfb8 +-xsf ccted to a 12.0-V battery. Howo8w3*c0rf qp;o4x -jx d(u; k+l sbfoq 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 capacitor4x b2nrkkr) p8tgk 8/qof:d5h is 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 capa+jrsews-,kce2 09v qd citor 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 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 o x*j)7oh- p/b3w l tiyyz3w-gjf 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 ;kcc8 *.1 tu+ugud(tjqv:bzcd x6 rh +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 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 constructek )jcetg.7 d-705nepjjiwd (pd 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 c* -bvgxp5 ,;aypek(c v )ga1qkonstructed 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 ba:ahw,:ke8cb du crmqj9b:y- *ttery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is insawycj,euk:-r9m hb d8:*c :qberted. 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 bat8 7lgopjfzf pu7 y.+j*tery 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 diyf+7.jogpu* lp7 j zf8electric 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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