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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 electromagned rx3fh;hb: 6utism 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 produced k / r00sk4v3zqhy3wzw 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 field will p h0gxt)m/(vk iroduce 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 through af8mij lu )- p322yuytg 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 velo e)o3 aomc/y(ecity of 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 trave*e a wx2;xhadgv ku8 u8uo;.a,l through

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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 tpza *45 uh1yfq9 bwmx otit)ym 7)v(e1he electric and magnetic fields in the radiation field are found to decreuexoh qa15 i*fm7)yt1 wmztvp (b )9y4ase 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 given s3 mco 1wnpmc:kk 2 a-x./kf8ipoink2x k1cf3i .8: mwsmaponkc/-t 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 is radiatedu x3o*jexmns p;4u a2: by a straight wire antenna that is oriented vertically. What xp3j4ex2o as:um;u*n 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 arrlyhh0 +: pbm w*;(cxge

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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 electromagneirqz5. .jq wgx8+hi0 atic 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 f;(koa1 npvtsj i5k -(wrom

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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 5pp p,po,cbc khg/9)atransports per unit time per unit area is the)hkp5acogp9, ,c/ ppb

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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 exh du ;6ojei(0u7m o+zz rx79v-wbdd9 q+uj r7berted 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 yr/m4 y/k)-mpe pr qf63x-odmin order from longest -6r)f/d km 4mopp3qy x-rmy /eto 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 isvj iq5/qj,yjdk: p m() the peak value of )vpykdj/j qi5(qm j:,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 o j)4y5af6bvi xpe7pqd-;7kn if their 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 nchtoc(x / -0ot-+suz of a 92.9-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 b+m ;d8fhh u+fsignal transmitted at a frequency of 7.2 + buf;8f+ hdhmMHz?

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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 8of -x prs;m7vfor the 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 mm micro ,0e4/tz lgz o,asn0gc x)g3lywaves?

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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 in 1.0 ms(/kxqa. twfes:9 afh9 ?

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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 travel p.y qf-j; cel 4iq7n1n1.0 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 rad81kqq wj z05 )xgnzq ig/p.cc0io 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 c(f r lm1/qiz6yy tq/;in 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:bbfwp et++ 5a0wvpg1 pulse return as an echo in 20 ms after transmission. How far away is the rt+pwbpw: f a v0bg5e1+eflecting 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) 0w9ha swp+. piyr2 db(at a rate of abou ip(dbshr .w9+a0wp y2t $1350 \; W/m^{2}$. 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 atmosphere) ato3 ) ,e2y.bnzstidsja.9vcv( a rate of abo cs sv,)eba n.dj 9it(v3y2.zout $1350 \; W/m^{2}$. 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 electricv *v35qix3q8 g*4fy8y.v mnktn +uadj field at a distance 2.5 m from a 100-W l m53yyv48uija*dq.qg f n3 vtx*k8v+night 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 magneti 5g 0efseom93ec field at a distance 2.5 m from a 100-W lighe0 e sfg59e3omt bulb?

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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 ot/m f(.dv4u yrut a narrow beam 2.00 mm in diameter. What is the average (rms) value of the el r./(tmfvy d4uectric 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 .oxp.k9whmif k, kjg5)g8ge 23wfxl6 is the average (rms) value5ghk, op gk iw.jxf2)36kxw8f. mg9le of 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 transported across a)qa(;ch. uzb aepy* )k $1.00 \; cm^{2}$ 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, gic- 6i 1dpvjg3lkn1v9sgb m +3mven 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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