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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 hc.sjv9 )ts-f 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 scxu)a)n:j lt000kgz 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 field will pro4l*ivvn9if 5ec bct2(duce 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 a vacg:,f pu.peh (xuum 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 wao mfeb6wn, )5xves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves cag-hw8 7ye7r: fwk g5cp5c:or sn 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 electric and magnetic fieldsd dr (2o/g5z zo,rx5rjqb8or, in the radiation field are found to decrease with distangrz x,o2,r(qrdoj5 5odr8bz /ce 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 0 fttg/g9ti1v kx.l z)point i)kt/ 0g tlg.tvzxfi19ts $E$ 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 i;va m4 khm0l0 ui4dt/is radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wi kamhm/4u040ditv; l ire 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 0m0s uais1/l1i7;p tweizmoz4s5g 4 gare

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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 nolwj jv2 0sp++z25sn smt 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 wad:qu8m+ 2iw/+byz -: qcftvfr velength 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 ni6 ix:2m syi+unit area is thei +26mis:n xiy

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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 electromagnetic wayiw xvs9;e12p ve 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 bx98ue6 av .ljorder from longest to shortest wavelexj.b9lauv6 e8 ngth?

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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 a41(xr+*tj,cjfs .xilh dry l9n EM wave has a peak value of 2.0 V/m, what is the peak value of rys9* x.rtj(4dif 1jxhl+c ,lthe 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 frequ9avkjqoy ;.z,p ;).fi zs8riaency 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 wavelengtiu+*z. qb4xmpb 6vt 3eh 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 signal tran lz28+7rlbgn gwn* t:qsmitted at a frequency of 7.2 MHg8brz*tng 2:l+lw nq7z?

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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:;c8 dys q.u*tdsqe 4r 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 20t (+a -bj3 ru;nyqbt8p 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 travel in 1yx:+82bkx d ad.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 trav6lvqv2e nx(r 2c9 nj,tel 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 sinvw( y*zh7y1jgnal 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 trav 8y0:fhytcujn3g, e:b+7gw r ; wowt9sels 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 transmis*pl5oy2kg *mz/hfz 9 tted pulse return as an echo in 20 ms after tran/ykh5zgs* l*9 zofm2psmission. 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 Sung7ssurp p3 1k( reaches the Earth (above the atmosphere) at a rate of abous1s( r7pgpk 3ut $1350 \; W/m^{2}$. 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 t h3 s)ygmmd (6,/kubqdhe Earth (above the atmosphere) at a rate of about(u 6 ddyk)qmb,m g/sh3 $1350 \; W/m^{2}$. 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 nch 1jr-5f*ee of the electric field at a distance 2.5 m from a 100-W light bulbne *r-j5 h1cef?

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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 do,ht1/ cld2.rqrq - py9 d7cbvistance 2.5 m from a 100-W li.h pd 9/c lrcdytbo1 q27-,vqrght 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 8ci citpd0ln5y .jz4zdg*+; f narrow beam 2.00 mm in diameter. What is the average (rms) value of *zic+ iy8ctn4.ldd0g5jf p; z 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 averb h - k.bif,./7ilmgpaage (rms) value of the ma.7bibh-migl f. ka ,/pgnetic 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 gc 9p0 eofpw4qs2 :ks6$1.00 \; cm^{2}$ 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 pown1, lhz /1lc2d s9i rbwci pst8+hl3:der 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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总分:35分 及格:21分 时间:不限时
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