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习题练习：Physics Unit17: Electric Potential
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 作者: physics  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 followip;rp5i q/d;ub ng 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 iwnxp2jrlo8, o eo 17acnl,8-xs 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 theu9z/t95p z-fcnd( (t: zxw sk ainf)g*ir surroundings. Object A has a net c( /9)audg :c 5zsftftw np(z-9 zn*ikxharge 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 t f:y k/6a kf)5okkn27l1.e *tppfge tmhe 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 moving in a direction opposite to ;,f 7v f/jfgj mzxqhh5-tpes7k,on30the 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. wzpo 9f0 b)9w3ohz aj)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 -c )hbmxf) /r-vk,ff*e. egj. qhu5jw 500 V potential differencfc /hxjqf-e m)-g5.b*rfvj kw ehu. ,)e. 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 potential is referred to az 7,bm7wkk-n 5h -msnm nas:r/s

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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, u3npy6zc2lyn 3n5pr to point B along an equipotential surfac yp3nr2ply65z,n3n cu e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surfwo2+;y6dpjg+m zv9 ouace 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 chargaw;/t pr g0w6ne equal to that on the electron as a result of moving through a potential di6pw/w arn t0g;fference 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 unitp xyai*ll, ;a; 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 correspondfd +,;rmbd0 8niacy(i 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 from a positive point charge pxs qp+4e*f6x.oh64hid6 ib iis 100 V. What is the absolute potential 4.0 m away from thp *.psxehoibi 6dx4 +h4f6 iq6e 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 charge is -1rd 55r)dsf wnv- jw5p800 V. What is the absolutpv8 5nd-5d) s5jrwrf we potential 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 at wgmf u y;55m68,elwae2gll 1rthe 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 absolute potential at the square'sw f g5ell,2 mew6rl;5ym u1ag8 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 o*nx k 74jbaxp gwtj9h,2(cw4if a square is 3.0 V when a charge of +Q is located at one of the square's cor2wj w*jxa,(7np4gtxik c 94b hners. 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 alwaysm-)(t jsdi. pj consist 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 is au qnf5v*6d.o d

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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 jiwkq68gfu a*) 12 cdxare identical in every respect except that one has twice the plate area of the a*61jw2qdi c) gxfuk8other. 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 the plates* ;l s/8jk37vmy sohxf is doubled and the distance between the plates is halved, what is the new capacitancemx7 8; kv*jh3fsl/syo?

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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 7d:dte/o *nc wthen is removed. The plates are immediately pulled apart. (With the bao7c/wd tdne* :ttery disconnected, 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 capaci macqn86woc-iuq)8z ny8y)n 7tor is weakened, the capacitanz8im a6)cy8-cnnuw8oq 7yqn)ce 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 voltage bnl er7wokd6o14 k,h crof8 7y6y a battery as they are pulled a61n kfckhrl867w o r,o4ey7d opart. 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 g0 0mqs-z)gjo 3ny i7r *3t:ef jzdcv:with constant voltage by a battery as they are pulled apart. What happens -*g:ei3qzn t7jvry) j30s 0z d:gcmofto 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 the plates of a caple0o f7c/ipy/hk wp2 ;acitor.lci peh fw2;0 /oy7k/p
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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 the platk5su7 5q(kynres of a capacitor. What happens to the capacik 7ur5k (nyqs5tance?

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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 v5lb mcb1 yicd f09gmv(cqb nw7 0y*60plates of a capacitor holding a fixed charge. What happens to q7 v0dgc 0yw1by*fm(cn09b lim65 vcbthe 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 connectedt3 7ow9/ voheo to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plateh oov73 we9/ots 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 causes the ezzf9q ;y*+y)lv y.q e5k6thftnergy stored in that cap+; 5h.el9)vzy* qy zfqtkfyt6acitor 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 stored in thatgg- 3 tjoafxw *ke89-z caa jgwtgke3x 89-fo-*z pacitor 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 cmv +g10zpsja ymv*o 4 agv8d7+harge from point A to point B. What is+0v7mzp41 j avga*sgmv yd8 o+ the potential difference 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 electron from point A, where the potential i,qwpik44* s0rr vfnn5 s -50 V, 4qfs50 vrkn*n4ripw , 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 24 koa )fa1beko +byl4an electric potential difference of 500 V. What is the kiklaf yb+ oeba2)1ko 44netic 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 accl u ),hxc qwb0.-.6cadge 6isielerated through an electric potential difference of 50066chu . b-q la,sxeic)d.0giw 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 a potential diffzmnjjpgw g4 f18;+w 0xerence of 1200 V. What speed does i zp +fx4w8jm0g ;1wnjgt 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.ga(r wr,tes2- 0 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 through a potentiaajg/2 s c5 )x/fvqrw2kn96g fql difference of 500 V. What is the velocityq5 /rj/)a6 f2n2qgg scfxw9 vk 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 carriehff+ lw+w,h9z s a 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 + w h,+hlwf9zfthe 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 eler;nglshak-uv(+ q1j 0ctrical potential difference between two parallel metal pla(s nu- j0;1q+rhval kgtes separated by 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 field, with a magnitude of 500 nprpemm)8e57 iju 5 .sV/m, is directed parallel to the +x meem7r).8p5 n ispj5uaxis. 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 50 N/C directed toward the east: l*xp nm0p ;gq)df,klpo.p8 z. 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 of txp8fzpn) 0pm l:ld o,p g.k;q*hat 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 elec((+hhe7f7 i2v rlvusa tric field of magnitude 3.0 V/m. What is the change in kine(f7+r(ih2h7slav eu vtic 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, separatedztde)*c e k4b(q*agg) by 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. When the electron arrives at a distance 1.50 m from the positive plate, what is the potent)z( gdkcqt*aeg ) e*4bial 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 btz 9on*mv/bq/ )yy i6q0lyps1-c v c.dattery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a cl/ov s0myq )yyc.9qd/tz 1v6-n*bipdistance 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, separated2qxqk+;w1gonz7f0/ulr m4wd cj a 1r( by 0.20 m, are connected to a 12-V battery. An electron released from rest at a loc+wrndz/4g 0uml 1x2r7 1awqcofqj( ;kation 0.10 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 field of 50 N/C directed to1j 295b8 j mfakgdpgr-ward 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 fg-8 2mdb5p1gk 9ajrjof 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 :fpweoh0fis ep/(p -: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 sof phs :f-ieeo(: w/pp0uth 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 4 extn4zi3 ljhs)o;fd557dwja potential difference of 12 V, it will acquire a kinetic energy (in the absen4 nl dt5foxe j7hdj;3i4ws)5 zce 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 distanv30b.4g knokhjln 5-wv/j-y dce 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 electrg1 /sqydm q3 1h,mjdi1ical potential for the cq/d mi sjy 1qgdm11h,3enter of 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) hp uf6i 5bd,q3and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is q i5b,u63 hfdpthe 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-nj t;dx y/z8kz0C charge is at (3.0 m, 0). If the potential is taken to be zero zx8jtd/ y 0;kzat infinity, 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, 0) and a 5a 350ntcq-o it,6x qq0)vmafjhl )ui-2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to brinf5h 0-,v5l 0u i3itaqt)o 6njcm qx)aqg 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 equalx kgd xn1jae;vsc3*pny/l:i(ff 5. )*t c0z zf charge +q are placed at the corners of a rectangle of sides a and b. What is the pot)t nfzg:dfp3cx150l ik;ay. zn jxv/f c(**seential 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 placjad0s (cxihn8g-e,y-vy+b .eed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What iy-eg-.nej0y(+ hd,ai s8x vcbs 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, mas9o4n qmc-dr)r5 *,tq:0 -yibvz cumjvs $6.64 \times 10^{-27} \; kg$) 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, eac7rysy9cue7z 6)xbxt;i b.oh(h of 2.0 mC, at the corners of an eqct9zr ex6y ;iho( 7bbys7ux.)uilateral 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 plateih r2;avxtk9- zr89e qs of a 2.0-mF capacitor when it is charged to 100 V ri92-tzve;k8a 9 qxrh?

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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 sxk/sxa.mo5o4l) :ehhas 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 wytg4w/ pu -nju)f.k,dith air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF, whatd/f4u.p -ty,jku nw) g 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 capac* axk9n w1 c0bgtc8xi2itor 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 h0 ty; y k,pmiw:z. h+7rhwbupun5 8ak4as a plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the kyw0p5wma;4tui 8,u+pn r7.:y bkhzhhigher 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. After the:gb:c, ppul;-scs g81i ly/vs 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 congy:l pspvsc 1gbilc- ; s8,u:/nected 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. rs+y9nhgy91, g quh n-How much energy is stored in the capacitr+gh sn,yy919-nqgu hor?

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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 1b grdv5+ (pjq.5 mF capacitor. What is the energy stored in the capacq+.drj p5g bv(itor?

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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 u seh5moan;df* / +5ogit is connected to a 12.0-V batter+5;hf/d5u a nm *eoogsy. 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 that it j lgca6 y3n-qy 73ha*gstores $2.0 \times 10^{-3} \; J$ 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 capacitt4/ugv :yt77hxq jz8qn,q b e9or 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 of plates of arem, g df:0bi(sea $1.5 \times 10^{-4} \; m^{2}$ 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 cappl q(q* es/t5f byst7)acitor 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 constructed wi8c*t8vqm 0iwgth 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 areu51 9wtmez lxndq );t6a 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 bec ohf jn89.p3vq f,0urdomes 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 capacitor affj8or.h39p ,nq uf0dv ter 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 b l(uxcb 93byzew1 9n+do0ay .dattery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is insertl9e3n10+ zby aw9bdxydu (oc.ed. If the dielectric 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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