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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 a t :aocfw)d0z9ll 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 pr .4 5icy l4oc*ir6-hiegfwv3ax)tz 6qoduced 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 w9t4dsgo q0xqk 29r f7jill 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 wavefs + 2ogja/+ xoa)(5oaskgf ymq kv2*(s 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 electromagnetic 9/ v6r (kur,elpo x)jpwaves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves can90ix9wntndw h4mo28r travel 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 the ele/ch*e k;p,yy rctric and magnetic fields in the radiation field arey;/ epy*hcrk , found 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 to1/w3 q on6tmbwxcucc6() i vp1 the east. At one instant at a given point it uw63pb xcic( q/otcvm)1 1nw6s $E$ 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 ragq-4 (cbvuv5j 7sf ,iqdiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? I g qivb-(5fs,uvc7qj4t 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 wave 5fu; -u8almct5 :c)e(z+x qni8waects are

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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 electromagnetic in nath x2p2ii m30isqm4r)oure?

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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 wavelengci l/ ;qzz/g87s- tqeoe*v0 mb45-hht; aiyclth 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 unx ys0wue8l-kqb)/h ;9p d hhj2q 4tnv0it time per unit area is thedn9s0hwuq 4v -;8th/2 je hbxqypk)0l

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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 exerted by an electromay4 f+btm w6h1oihc v52gnetic 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 listsaqvi+-r ; /h o fgh3tu1uuq9s1 electromagnetic waves in order from longest to shortest waveleustr-hq/1 1aouif3 ;g uqh +v9ngth?

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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 h),cbu9+wv 5f, ettriby d-m1wave has a peak value of 2.0 V/m, what is the peak value of the cb+hb r-i,u5,wtd9v et)m1fy 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 their frequency sb u)p587 ojw;ftyke. 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.gbf0( s9 px2+h s7zmic9-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 transmitted at ct7l k7ik *;ee,bou/9dq lng8a frequency of 7.2 MHz?8u,nl7* k 7el;c i9b/dtg kqeo

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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 the station WBRNgt.am-d) ceab,+7 ecw 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 wx(ay 7lpdq0+n6 1nji20 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 trave3 w 0gx/vz(*izlnp :nxl 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 light to travel 1.0 d 74mrfl, u0 jyz5pz6h*( tkxem?

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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 frox)*h je3c4upx m 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 t+edj yt58 3qr (laz35vq b jb7;kvxy5mravels 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 pulse return as an echo in 20 msz +ivvotqq -ri.3x 2f) after transmission.ivfq zri)t3qo.xv+ 2- How far 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 the Earth (above ta2z*y lo 2+d s(p,ugffhe atmosphere) at a rate of about + s,au 2dy (z*ofp2lgf$1350 \; W/m^{2}$. 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 reampxz/p(a): iyu5m7( dh0cpn x ches the Earth (above the atmosphere) at a rate of abo/c7 (05xmadpupmp y)(hnz: x iut $1350 \; W/m^{2}$. 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 10( h of2uu)v84*jlu8uxcasb /q0-W light *s4l u8x(o8)v2fua chuj/qbu 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 magnetic field at a distyh(fojt0m7 pem; q d: rt..ly1cyx;w+ ance 2.5 m from a 100-W light bum qy.crwxt+edt :(h f;joym 1y.07lp;lb?

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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. Wha: ,na uusecxv*35-pu it is the average (rms) value o avu se3icunp:5,*-u xf 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 s r-8hk fq :6l)ev86-y9kce0hjqchpe is the average (rms) value p fsv8:k9eqjhrh q86k - c6 h)e0cy-elof 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.2ixa,10caev bd u z/b 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 that abou 2sjwymh7xb+d l5 :.mot $1350 \; W/m^{2}$ 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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