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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 a7v3iup dv,xpsbg6:n7.p nz e4 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 :ovi,lrygi7yf - zd5h3v6nr ;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 objec8, c7m t4dvj gd 0eaf3:ggqgfq7zt8 7bts are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at abztvg d8gd 7 fj7e7agc g0q3t:,q4f8m 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 di5bf2b5erfv;mu h3( verection 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 eyq9iw awdbb;;e,p3e, :9a ur nlectric 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 kb9+c5ven9 sn. 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 a znff hwzf pktoz.96n,27yc z6ir369g500 V potential difference. o nzg93zchiwf kz6n9z pr667,.yft f2 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 poterr1htvuub/druea:e 4 -3 h f1)vt-f r,ntial 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 exqbhp;f/.7 nlyd0k*uib +5mf quipotential surface/5bqxu in*f k f0;m7l+p.yhdb.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfactw3j 7cv vn/08:szk xae 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 byg bkn bv df5dg:j:cez4: ,c0p3r4cjl, a particle carrying a charge equal to that on the electron as a result of moving t4ncb ddb,:zl5: c0g 3fgv4jjecp:rk, hrough a potential difference 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 uq scs6zl3pz35 )rw -j 6irok7qo.m:ic nit 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 corre713 :v5hmp fn ;qdcguusponds 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 c 5*16vbndv27stpjd (mo 3 5o le;wdwaat a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the sam*1s w23la 6jb5; cvowd(p d t5oen7dvme 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 ,yh +iu y:+(g2lfq bunn2vka ;m from a negative point charge is -100 V. What is the absolute potential 4.0 m away from thvafb2q(ul:h yn 2;g y,+ kn+iue 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 n p w3+6 w4c7mwksnv8yfdoa9 8a 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 other corners is also filled w ns8w v8fmnk6 o4973d+pywwc aith 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 3.0 V when a chargylvj4(5zpkdy 05nn)o e of +Q is located at on nnd5l v (zokpj)4yy50e 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 consisea jc7 fr :mvq76f7(vtt of two 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 ii53ymu g:uwl7chmky ,crwt,8 p-;e4js 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 resv vtbfvm43v7zlw9+3 r pect except that one has twice the plate area of the other. If w 93m3 bvv4v l7zrfv+tthe 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 the fqw ;bhffl6e. xs; 4a4plates is doubled and the distance between the plates is halved, what is thfxq6s w4fb;.; h 4afele 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 capacitjd+zxmd6d 5/ : 6bc;mj pl3wknor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amd;n/jcb 65xz+ m j3dd:wpmk6l ount 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 betwbffej*/7lu tr ;:-a fween the plates of a given capacitor is weakened, the capab ffrtf l:eaj*/ ;-7wucitance of that 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 constant 2y/hpdns 4v:d3yocax hs 7*h/xl:dl .voltage by a battery as they are pulled apart. Duv* sad .: dchlhxp2 4y:l3dxs7yn/o/hring 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 witlfe m73: y as5hg zk2dalm7yfs r*960bh constant voltage by a battery 30 * llrkdhgy6eamz9sfby 25:7am s7fas they are pulled 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 material between thc :qgwx(fd vq/i:w9y1y:-fmb e plates of a capa/cdix f(y:wg b:q:vq 1w-ymf9citor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material suc st p uzr2um(1gdp73+lh as paper is placed between the plates of a capacitor. Whp u7lrp +tg(dmz321suat 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 pa rftgw44r-p d*fwn+e 2per is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field betw +gwen4r 4wp*fr 2ft-deen 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 fulvjo671 u,j willy charged. The capacitor is then disconnected, and the separation between the platu 1,i7jv 6jwloes 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 ccfe/j p +sop6+mz,0uk harge causes the energy stored j u+0eps ,z/mfk 6c+poin 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 across a given capacitor causes the energy mp. * 4ikir2 ubjl2f7rstored in that cf7kjubr2imp.r*i l42 apacitor 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 mov/hw4*:e nurjt35m ybm e 10 C of charge from point A to point B. What is the potential difference between b he4* tuwj5:3rm /mnypoints 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 point A, where thx7ojxdq o vw. ,dp)r:4e potential is -50 V7 .qvd xj)o:rodxp4w, , 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 electri:z(kcn syxj iu.d:1s hin3 w5)c potential difference of 500 V. What is the kinetic energy of the proto:wj 3y ku.h xnsn):i(s1z5 cdin?

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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 potent arvw /n(j1pw2ial difference of 500 V. What is the speed of thvrpj/1w2( nw ae 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 1200 Vhqg/ el si- ay30i8wx;. What speed does it acquix;ws 0-igie3 l ayq8/hre?

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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 - kvwxw3*ztfo:i o3du.b4 l(q$8.5 \times 10^{18} \; electrons$?

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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 b,q4k2p bd4rd8zcd0i 8 xswx+jc 6 j,ta potential difference of 500 V. What is the velocity of the eleqj8, +c6jpc24tsrw ,ddbbzx0 4 k8xi dctron 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 rest th alx**sun4cfq 55lc5vrough a potential difference, and afterward the ball is moving at 2.0 ml *cna 54fqxu5s5v*cl/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 potentfb/e36hb.huals ) j; dial difference between two parallel metal plates separated by 1.0 mm. What is the electric fil/bs 3bhh6e;fju d.)a eld 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 directedv)a4o 7c*hmre parallel to the +h*v47r ame )cox axis. If the potential 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 5dol(i1-9zypj-rl (4vo el b 1l2yi tf(0 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 yr9loi f-z1ly tdv4li -pb (l(j(o2e 1of 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 electrlk6w qu;1lq p.+bn0 ksic field of magnitude 3.0 V/m. What is the change in kinetik.6bkq1unp+w l0 s;l qc 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 battz n3 rxe+ j+6e3srq mezp97q3fery. 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 frome f+9qe+mz3ej37r s n zr6qpx3 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 + )oll-z5p-hr,v :pnx, gztkp0.20 m, are connected 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 kinetic energy does the electrong pozxv,l,n-zt5 ph:+rk-p l) 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 ts22 ; mfzpi ,40ar0uvlsctn(io a 12-V battery. An electron released from rest at a location 020t iznlfsm ;04ic2,rav (ups.10 m from the negative plate. 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 fielilq*f e*j em/dt ,.reg18w - ,iab6wayd of 50 N/C directed toward the east. If the voltage measured relative to ground at a given point in the field is . r*jmq-g dafw6wye 18*l,t ,ei/ieab80 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. If thbz(xzh,p(2 vhu; x h, elr5a5ze voltageze 5 z,x(zlb hu2h5hxv r,;pa( 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 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 ac. 8z9iyyyh gf,72vbg zqrp-a4quire a kine yvyg.rgzz4qba,f9 -27hi py 8tic energy (in the 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 distance.n0 a8)pm i8qlray c3*hg5uq u 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 sjmey/*4e5n : rclqy-vtn8pzrz)2lz,tick. Find the electrical potential for the center of the meteey 52*rz/znn:v 8zj tp4yl le q-)c,mrr 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 q.ldq 2n+*c0gq e:sov-2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential at0gq2n dolsq *c.:e +qv 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 (3.01rci2v3ujqva7rttz. uy.il67 0q ic- m, 0). If the potential is taken to be zero at infinit j lruai7i -qtr.t.vu073qz y1ci6vc 2y, 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:+* cxry:d0rlgka6n6 eyd 5ed (0, 0) 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 require *ryd 06k :gry56dad:elcn+ exd 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 corners of a re ;s ;sq;uvxzy)vkf9sh3og+/vctangle of sides a and b. What is the potential at the center of the rectangle if gho9fy; z/k3v u;v)q;svsx +sq = 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 twot1n svgi )4t-k diagonally opposite corners. In the other two k -vgi1ttns 4)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, mass 7qd ak(2hzx0eqclg 2gq)v ;d 5kbqb45 $6.64 \times 10^{-27} \; kg$) 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, eajmls,gg)dcac52dds* 6eat+ 2ch of 2.0 mC, at the corners of an equilateral)lm22+*dsctdg ecaj,5g 6d sa 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 ittq( 9 cy8ny-,7alq3j2g gs vfz is charged to 100n flg(-jq, vtyzqa9sg y38c 72 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,ii/ xu755 dd mjnvs(litor 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 t4rg jw:3vi i6*haxfh(h y:sl0 1kkez6he plates are separated by 0.050 mm. If the capaci vx3rw(i jh:fsa *6gek yi6k41l:z0 hhtance 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 capacito8ar 5 dx3p asq0qk (0z.1pxxkor 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 of 5.0 cm. If the potentiashcmz.u jo10. l difference between the plates is 2000 V, with the top plate at the higher potential, what is the m.j sz.0 ouch1electric 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 batte; f,yby6ob 3rtry. After the battery fully charges the capacitor, the capacitor is immersed in trany6torb fb 3;,ysformer 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. H-y:4)k0 t mhoeuu o6adpo:j,pow much energy is stored in the ou a: ,:m6khpu4od-ot )0e pyjcapacitor?

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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 enen: ooa/,/ uswergy stored in the capacit,oaes :/nu/owor?

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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 cojd us2v 05an5ennected to a 12.0-V battery. ade5v n5 suj20 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 thatjyv:a /xq;n j6szc2 /p 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 ,kd0 jq7)ys79 swa+ ym pyjct*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 con ;,w.ejcgzy r 1ot g535v a7(dbpbv:gdsists 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 plates of areapfm 8rame0*+s $1.5 \times 10^{-4} \; m^{2}$ 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 con6ckg h/i8ng8w structed 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 plvbkm4 t lope)q52g*c. ate 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 charged. Thesbnt4wh- ;3pv0jt.b u battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a dielectri3s0wt b4vju;b-pnt.h c 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) 0.hf7bgb n:vs v9nuu 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 voltage across the capacitor'svs:)nv ub0hgfnb u79 . plates after the slab is inserted?

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