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习题练习:Physics Unit22: Electromagnetic Waves



 作者: admin   总分: 35分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月28日 10:07  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  
  The basic equations for all electromagnetism were develoe;2t nnj2k3xw4 nxjkq( 1l7;rr z dmm1ped by

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electric field is s(b10m,7fgj-o v( 5okado:z/zuesca produced by a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A changing electric dk9 ho,h/ *4gbmdh r9rfield will produce a

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic wnfn:mcfy h4 ;a05hr3lxp( 74gfiuv:daves travel through a vacuum at

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a vacuum, the velocity of all electroma 3hbfuu0bc3qn;o4 lq :gnetic waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves can travel thr1b pw4tkctix.faoq :+:,p, s wough

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The strength of both the electriw 3mzlvckl2z./x1m6( (q fwec7goz*mc and magnetic fields in the radiation field are found to decreal*lmc1ox7z.(3wcv f2k(wqzz e m6 m g/se with distance as

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The $E$ and $B$ fields in electromagnetic waves are oriented

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electromagnetic wave is traveling tkym)w o3t .1udoob ,g3o the east. At one instant at a given poiktw. obm)go1, d3uy3 ont its $E$ vector points straight up. What is the direction of its $B$ vector?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electromagnetic wave ixm5n zz 7i jm;o/w4aqd y4xt)5s radiated by a straight wire antenna that is oriented verticalx)t7nzy 5zo4; wqa / xj5m4dimly. What should be the orientation of a straight wire receiving antenna? It should be placed

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves a)/btov u;68xn t5la 5f pn,zcgre

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, which is no0kjvz. 6zvrvh0ipf8 w( dy1h(t electromagnetic in nature?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Visible light ranges in wavele : xre6)oyir(6lbf)jq( l vr90ry bn:ingth from

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy an electromagnetic wave transports per unit time per unxqxw7-y83v6qxrcbr / it area is the6cr8bxyq/v r73x x-wq

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The force per unit area eaj 5n91irw aik7/gf w8xerted by an electromagnetic wave is called the

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following correctly lists electromagnetic waves in order f j,uous6azx;j .9m tt/rom longest to shortest wavelengt t/ uzmx j.96toja;u,sh?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric field in an EM wave has a peak value of 2.0 V/m, dlxy s0 x4pu8v)l,v 6mwhat is the peak 8p04dx xvyv6m,sl )ulvalue of the magnetic field?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength of light waves if 17, oj vpzrjj0-b v1/tz0xbshtheir frequency is $5.0 \times 10^{14} \; Hz$?

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength of a 92.9-MHz gw*pm4-fo)7z ug 5nag a0kgn) radio wave?

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength of a radio wave signal transmitted at a f4 iwte(h n2px/requency of 7.2 MHz? (nx2t hei4/wp

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength for the carrier wave in 9 dzou pu2uc25the station WBRN 1460?

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the frequency of 20 mm micrr98q6 g-e mbdiowaves?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How far does light travel ikn 0vwwydzpo168n1lk: ag9 d1n 1.0 ms?

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How long does it take light to tri u+2j67vf: pg(izcxg avel 1.0 m?

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How long does it take the signal from a local r; lm.l47y od.fzkm xv4adio station to travel 20 miles?

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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How far is a light year (the distance light travels in a year)?gpf74w3bu f4 k4mpd d m*0faj8

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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A radar receiver indicates that a tagzii)06i t t4ransmitted pulse return as an echo in 20 ms after transmission. How far away is the ref06iat)tgii4z lecting object?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Radiation from the Sun reaches the Earth (above the atmosphere) at a rate *; hrtydmn5xt,nmih h :*f4h 4of abo:th5 n,y4 xnh t*mfirhh;4m* dut $1350 \; W/m^{2}$. Assume that this is a single EM wave and calculate the maximum value of the electric field.

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Radiation from the Sun reaches the Earth (above the atspn)h-tq )0qdqqy2- omosphere) at a rate of abouthtq)sdoqqny)p0-- 2 q $1350 \; W/m^{2}$. Assume that this is a single EM wave and calculate the maximum value of the magnetic field.

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the maximum value o;tno rm/ 3b5zx hdsbw)cz2;m3nv m5(rf the electric field at a distance 2.5 m from a 100-W light bulb?;h3br) bsmmv3z;mzonxn w/2d5ct (5r

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the maximum value of the magnetic field at a distance 2.5 m from au)anh r(lj8sgz 9 gr+3l-xp ;mzbkg6) 100-W light bu(lbmrpgzgl8an 3)g k+hus6-xj)9 z;rlb?

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15.0-mW laser puts out a narrow beam 2.00 mm in ve i9mqf1y6j:giw:+yr89 l.ht w5l yodiameter. What is the average (lq86oiylw9:f:re5jyt+ v9wig1 .hym rms) value of the electric field?

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15.0-mW laser puts out a narrow bes ;+mxc6zg*cph )seq ;am 2.00 mm in diameter. What is the average (rms) value of)q6gs; *;h escmpx+cz the magnetic field?

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much energy is tra4rbafdkki2g5-yww3st p 5- v-nsported across a $1.00 \; cm^{2}$ area per hour by an EM wave whose electric field has an rms strength of 21.5 V/m?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Estimate the average po guc safbbf6- v:*c;,mwer output of the Sun, given that about $1350 \; W/m^{2}$ reaches the upper atmosphere of the Earth. The distance from the Sun to the Earth is $1.5 \times 10^{11} \; m$.

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