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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 o84 jp45z-l2ce4l9 yswwq6dkjxa 0 ar electromagnetism were developed 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 p /wfrl;kbkr);7r7ue troduced 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 fieldk3jpbdv s(0: ()s oexu 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 waves travel throu*smpsr 1gw9 )fr4iehl9ua*w (gh 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 6-1olckce;+u pjn0 3+8 jwoqim7l hjnof all electromagnetic 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 throvufnv /jw. 6wjypnckmei:dqkz//e :(q 0)b3 8ugh

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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 electrk8cg i qh8kwcww;/. w d glar.y.;hd4)a,a /iyic and magnetic fields in the radiation field are fgh gw/ diw .adaww );q;8iah,r8yclk.4k.cy/ound to decrease 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 to the east. At one instant at a gt7 lngk 2g)u-/cfj wcq6u 37ipiven point -)/u3fi knc6upj g 7g2clwq7 tits $E$ 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 is radiated by a straight wire anteaj hr:-ox) rv8i w)7dznna that is oriented vertically. What should be the orientation of a strxrz7w-)hivr:o j da)8 aight 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 nml3 -/jjz3i 4j)zsglxp, ,m kare

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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 not+ r860qrrv*rl uev tr* 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 wavelength frokdlu:, u,uze *2:c cidm

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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, atvkitemhi (h z2:51 per unit area is thez,:h5itm ith 2ve1k(a

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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 aru).w)xpqhhe2 k u;;mr3i1v (iykem 6zea exerted 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 wave,kaaown:/ gau- o.ws2s in order from longest to. wok-ow2/as,nga: au shortest wavelength?

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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, what is tgcc.mtya:66 e he peak value of the c.m6 eta6y c:gmagnetic 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 their frequency isntr 9qopygw90 rj l/:0 $5.0 \times 10^{14} \; Hz$?

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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 9ib 0/byuo(9 a i)g3 byr-chxg(2.9-MHz 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 trad690v ffk5zn+s da(nznpd9(jnsmitted at a frequency of 7.2 MHfnnspzvj5d dadn(9fz609 k (+z?

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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 d g4 ;f-eoc-o8lsc0acthe carrier wave in the 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+ b ly mm)phgy4v70qm. mm microwaves?

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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 trar)v.. 7eif:cq vspb:7b 8oxkovel in 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 lig odjbzf:3 k*80*.(ju nxfb-jylqx -raht to travel 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 thu )::x6b3c0 kcsda/ odl+vombe signal from a local radio 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 i 8oc8 6u j6hk0a:xvowtn a year)?

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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 transmitted pulse return as an echo in 20 ms aujqc962i:k w 23m tisvfter transmission. How far away is the rw2k utis2iv3cm6q :j9eflecting 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 atmospqn hj 1l/.u8dluf,)sh here) at a rate of abod8)j/nuu .lhhsql1, fut $1350 \; W/m^{2}$. 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 (abon6;j.aj;xevb rlpu; 0 ve the atmosphere) at a rate of abonvljp0;e6 rb u;xja.;ut $1350 \; W/m^{2}$. 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 of the electric field at a distance 2.5 m from a 100-;o caej.tu6be+d8 ax:c02v2, joldhdW ligvda; d8:eho+ 2x0le bta6c ,c.jjud2o ht bulb?

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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 f yu5 / /qmvvs:eu x2l5b2z2s5t6h ozfmagnetic field at a distance 2.5 m from a 100-W light buo 56sz/f tby v5xq 2uhuze/ s2:f5ml2vlb?

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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 diameter. What is the averag1e,k)m un ( arz29 ezsfqu /4zxl*ij*ue (rms)xu l4) kan(9q mr *j1ezf,sz ezu2/*ui 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 beam 2.00 mm in diameter. What is the , jl;plyh3t b-average (rms) value of the magnetic field?pt-3,l;y jhl b

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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 tran 6zu .(gtr5su+tg+ qbqsported 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 power output of the Sun, given th1vjo x)g w(i9dm*jo mll)s5r-at 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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