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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 a 4wp;n7 sy a*8xdvoso+)1e c2wwq;ssuvector?

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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 a vdnp vil*m42.

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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 insulateddj9,lm rg,xm 7s qslj3 8g2mj sgcz4/9 from their surroundings. Object A has a net charge of excess elecg7jgs8 9grd9s/lzx ,s3m,4qml c2j jmtrons. 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 directi(g*g xaatw.1ta/egw 8on 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 movin,f brpgqo( (i4g 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 2 y+4p)bxh j*; 6qjyj jsihoue64l2lqhollow 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 accelerated from rest to a speed v qw+; 6nmym)j .ew+fyv by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the nvj+m.;wymfye n6 qw+)ew 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 fpn not58 p(k3 i,v e52e( beklubg1w0are at the same potential 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 poiv7 fie z/klfxukx3p l850. ;pbnt A to point B along an equipotential surface.3l xk.7 xki5ep z0fb/;f plvu8

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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 zcjp5y,vys ;r+hmz* 6be

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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 pagp 3o2 e*l sebge,e7f+rticle carrying a charge equal to that on the electron as a result of moving through a potential differenpl7e ogfe,+3*es2begce 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 9a5fd5eh0 h vnunit 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 corresponds toc)w ga1; k)lqw

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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 distance8jaew(6j*+ k/pm buon of 2.0 m from a positive point charge is 100 V. What nabjm+ ( /epukj86wo *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 a,bry6r qe0/a xp+ ,c:hqw ;yost a distance of 2.0 m from a negative point charge is -100 V. What is the absolute pote60o;rpxehyq cyra /:+,,wbqsntial 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 potentia9u8lf du4 4khml at the 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's center when each of the other corners is also filled with a charge of +Q8fdm94 hl u4uk?

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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 tt za4 r2i 82sr3f7mbwxhe center of a square is 3.0 V when a charge of +Q is located at one of the square's cornemsw2 ra4x 8t7zf3b2rirs. 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 th maqeo). 9dgp0at 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 isdhs 5zdo)ep7 8 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 re dqr gfto0- z+,qko ok2vyn-94spect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger 4qogon k,vkry0od+-z-f t 92qone 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 theds3p1( 1j)s0kgyumu /-yfaq t plates is doubled and the distance between th0ydutgja(mkyq s/1p) 3-1us f e 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 zj( klm dcae t-83e)a+capacitor 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 are beiet+ 8l ke c(z3jmd)-aang 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 is4wh,.8 s d5x7qr tinhb weakened, the capacitance of thi,xn4h rsb 7.hdq8 5twat 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 :g(.5*jvgrh o o0n q4t-egmlswith constant voltage by a battery as they are pulled apart. During this process, the ag-o*h oq:te5. jmrgv4l s(gn0 mount 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 maintain 4w59juqh-t8v8o2zjksi:w p3)ytan zed with constant voltage by a battery as they are pulle at28w5kh zn:ivjw-zo9 u4qj p8)yts3d 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 the plates of a capd3vdr w 4i+2 zv tb.a+hhwhf.rf 68yp4;jct2zacitor 2yhc2ta d4pb8.f;v6wzi3v+r fh hd+4.tzr wj.
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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 pqvr/5g .x xc ftdx+o42aper is placed between the plates of a capacitor. What happens to the ccvfd . ort2gxqx4+5x/apacitance?

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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 a(sj21g3gc9qr iepkxf6 j,1vu s paper is placed between the plates of a capacitor j321us6 (f9 q vj1ceix,kr gpgholding 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 connexsjxg1 .sa-j3 cted to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the pls.jsxgx-31aj ates 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 cause(jcf/8c 1lc fgfj6 7mas the energy stored in1 mag jf8ccl7jf6(f /c 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 capacit:+uc;lc jl w)t fbhj+ixft08a+q7 5faor causes the energy stored in that caph:)wff0xa8t7 ;j i+la5cf + cbljqut+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 n,9n x8pj wtl,from point A to point B. What is the potential difference between x9nnpjl, t,8w 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 Ah/l rmfm opk 1l*09hw7, where the potential is -50 V, to point lhr91mm0 p / kfhl7*owB, 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 electric potentiaar+z;eaid -t4 :+ m/8duqba-3vqy n ksl difference of 500 V. imz td+dyqq/ :;a84-+vauk-bsa3n reWhat is 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 a3ocls3*y6ru/k( sno hccelerated through an electric potential difference of 500 V. What is the spee ol(6o/yurk* s3h3csn d 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 difference of 1200 t2b equ/h)88dhxi 9cd V. What speed does it c8 idqhdt x8be9h u)/2acquire?

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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 9k1nc0 xb*x. ci.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 potential difference of 500 V. ;oodlj h68kf;4ib:ytWhat isdhf8 ti6bj ko;l;4o: y 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 oft hug)oox5 op+624ii z 20 mC. The object is accelerated from rest through a potential difference, and afterward the ball is moving at oii6 2op) zux4t gh+o52.0 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 maintainsry;)( gdtfxjy4+d5 kbpq *u jhmks170 the electrical potential difference between two parallel metal plates separated by 1.0 mm. What is the electric field between the pf;xyp(ju +ykgqjt)bkm5 r10 4s* 7hdd lates?

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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 )jh. whfhu cpzu+5mgubs1/q07 rsk6 ;/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what is the potential at x = r/).5;60 ujh s1kupzcuqw7 sf g+hmhb 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 di/ w a2umy*3kwi (gwr,irected toward the east. If the voltage measured relative to ground at a given point is 80 w2i3rm(y*iu g ,wkwa/ 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 elec+t qq 8shmwspo:)6gttonje2r jo)e0;.q:s l*tric field of magnitude 3.0 V/m. What is the change in kin8e2t+t ;peo s :o6*js)joqnq lmq.0 :sghtwr) etic 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 mom r:kuh1al f682nnu6m: ,n-n5vbjm h , 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 posolm:hnm f5h k j 2b6-u,uvm1nra86nn: itive 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, separat jxr3(nij;.g ned 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 0.050 m from the positive plate, how much kinetic energy does the ele.jgjrx in;n3 (ctron 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 )q/wdo8y 16cnafx67p+ zygr a12-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)g7 /porqx+z6 cfayy1dn6 aw 8 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 fi81g7mcpyi9 j8i 4d5 qk 8lkahteld 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 dirylct18gi958ki4kdpq h7m ja 8ectly 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 fihz ra3.j qrg36-7dzx neld 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 south og6-d n33 h7qrz.xrjza f 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 acquireaen 1d zr3x+,a a kinetic energy (in the az de1a x3a,+rnbsence 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 oq 8ky j/ip9olow/1 k71f1wbksf $5.0 \times 10^{-10} \; m$ 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 eno9 3y qa5edb.d*q dm.k5 5htwpqz4lvuk:3f3 eds of a meter stick. Find the electrical potential for the ct udk*aw.qd 3evf :5q eo lq dm.hy3p35zk945benter 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) and a -2.0-nC charge upxm /:2r 2wqw1c9zpe is at (3.0 m, 0). If the potential is taken to be zerz2peu x2p9q w:mc/1rwo 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.*-;9m6gkwi 0 cnsdo zfri4b2d+dlpl 30-nC charge is at (3.0 m, 0). If the potent40 p w;fic l26d+9d-mlk*rgzdsnbio 3ial is taken to be zero at 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 -9)7dr ws:l *4(mce)rzblh-gaq cu 1lf2.0-nC charge is at (3.0 m, 0). If the potena uezl:g )49*fwb lrc mdlrc7)h(1qs-tial is taken 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 4 b(w.rcqf)k athe corners of a rectangle of sides a and b. Whatck4ar(f)bq w. is the potential 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 v5b6ezg*,:lonn 1rma . Charges of +4.0 mC are placed in two diagonally opposite corners. In the other two corners are plbzn e5g a6 v*lno,r1m:aced 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 kt cvecd), dbvi2c (.;+2e, 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 necesj/hjq5) pddsf kqumgi .tm88, / q4iy/sary to place three charges, each of 2.0 mC, at the corners of an equilqfkt8 5 d,si /u gi8qqp4 m/hj.jm)/dyateral 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 ckdwrp6r 0juec u5,7u -apacitor when it is charged to 10r , 056ucd7jrpuk-wue 0 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 caph ;czyn-k9kp2ht/oc 3 .px0e nbio,6sacitor 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 /*bjtry pppwj*z*d(, air, and the plates are separated by 0.050 mm. If the capacitance is 17., z*pypjd/jbp* t(r*w3 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 capac,scf86q ota9 fitor 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 1b( mfx .iwh. h+c+cxsa plate separation of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higher potentimih.h1csx+c(+bw x f. al, 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 1iqpdyq gmh95-ybt8 3 - inu2:f00-V battery. 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 battery, which remained conn:5 9fg2q--iiy3pmt8 ud hbyq 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 capy29ah yvhy hy))7(ikdacitor. How much energy is stored in the capaciyd)ykay 7)ihy(9v h2 htor?

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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 capahblr o.wg ef/8g*3i- vm*-cr ncitor. What is the energy stored in the capacitrlrgci8venfw- .obg3*- / m*hor?

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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 b1.wp, gkrt *yis connected to a 12.0-V battery. How much work was done in charg* .rt1w ,ykgpbing 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 s-:(j,r) zobzxqghw2 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 of eyuss( o:vzdw4-tnwdl(e/4* v ja 9w )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 capaciy;w+j3;t0bi: gs/ 9yxd 4t km ygxqzr3tor 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 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 consistpx wn: b(4thc,s 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.t b q8abi m5j*e4skvhk5of osa;*6w3 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 con)t y3jkx ;*vpistructed 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 battery and becomes fully charged. Tsh x-s n6z+*mftuz6sm jc77; nhe 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 tn7 ;6fhs7j- m xztums6scz+n* he 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 fully charged. t9q,8wi9diq b 9r8ntw 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 afterd q89w98ti rqnwt,9bi the slab is inserted?

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