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习题练习:Physics Unit22: Electromagnetic Waves

 作者: admin   总分: 35分  得分: _____________

答题人: 游客未登录  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 electrxh)8vtka8sz 2omagnetism 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+r(bzqyo )ixl ,/p3 qz 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 willico( n syvoa4da80h 0: 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 war7xq 82ldn;km4 gbif3ves 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 electromagnet8zk9e2vocjt,w z t:wt1znwz).j x+l 16z s t0jic 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 through4:9cb1f m5emrbhh.ms

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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 electric anekfmd9fe-d(2ix tf4* d magnetic fields in the radiation field are found to decreaseei x4f md9ef(f-d*kt2 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 isvw*1 /4l tdireuw,9b f5:qaen traveling to the east. At one instant at a given point w:/5a bw1dlqrt9eu ,vf4 ei*n 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 wavx+ nugnnw pu;k-i)p7.;d c .kje is radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a s;;d)7 kw+ngn. u-ppk c.xnuji traight 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 atx:* vs*(xq9n 2rhydp)q x hv2re

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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 electr/zfsl/g4e 1naomagnetic 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 wa.mg99nce 4 rytvelength 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 unit area is thg )n9l3zc5q e lq)2kndeqlg 9)e d n)kzln2qc35

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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 eiez rbffo6x33e2 , r );rk(l:z+hx gqyxerted 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 co1-)yjmq ch+ t1mobfdk/v6n* gvh6 1phrrectly lists electromagnetic waves in order from longest to shorm )/v+y v6htjk1hch n1*m6gqf-dbop 1test 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 the pe3cw n)()hotq qak value of the magnetic fielo(qq c) )3wthnd?

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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 k+q.y pvbk/6l 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 cty;v.lcf1zi - xtt 99of 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 si9bisit.g9 7u zg:r2k(up4nyoe w*fi /gnal transmitted at a frequency of 7.2 MHz?i b2u9i4z :ksyr(pgfg7u.w*/it eo9 n

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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 t-4amqr )jke y*dv177 iit2cxuhe 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 microwaves?u8r;5z gs d. hv)9 wa8l0vdeyz

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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.u8n+wj orm3z3 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 travel 1.0 m?r m+ 78)apyptp

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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 fqv2dd(j .oyyqteh.+ i l3vn.q x*;ccm d+w0 k6rom 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 in 4-; v6f;om8sa jfn )efjem13xb oqi*oa 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 e9f.5u s58viud km rb-kcho in 20 ms after transmission. How farvf- m 9k.5uiksud58rb away is the reflecting 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 t3 - jtjc:9xdlvhe Earth (above the atmosphere) at a rate of abo9xj:- dcjlv 3tut $1350 \; W/m^{2}$. 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 q6d*g)+ cc uukthe Earth (above the atmosphere) at a rate of about 6dk) *uucc+qg$1350 \; W/m^{2}$. 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 s ( )hj9ei/f08jcpqpja distance 2.5 m from a 100-W pjp80 qcej)jh fs9(i/light 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 vacc:a ybp:mw)*ts 8ks 25gaap/lue of the magnetic field at a distance 2.5 m from a 100-W lightc*8pt s)m/sy gak5ap2::cwb a 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 out a nap+.ftg zpawgeut 8q)s,k1*j y):dc 7 urrow beam 2.00 mm in diameter. What is the average (rms) value of the electri7+f.st*8 z: jqu,gu d)1eytcg) akpw pc 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 y7y:wn/9,dxtqgp.s a in diameter. What is the average (rms) valxyqysnt w g./ p9,d7:aue 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 transpo dwkb l)zh7yq*/e dh8fyn, p5-rted 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, 1gw v7svh fn94given 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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总分:35分 及格:21分 时间:不限时
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