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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 feq8py idyl t) d3j+;z(or all 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 produced by a4 7wzvle (y)pe

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A changing electric fieloao 8ie uy (s(oy,6l c-)5qwlud 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 w tvn8yq *yooa6d3ke6 m-c3,h 2lrizd5aves 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 aly-m f/a x:(b ts;b(ghyug5wxgrveu+-3r )t(q l 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 throughlcfx)si * 7ry1

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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 electricsn6 p--+qidy a7ccr (h)dyr :qyu54gs and magnetic fields in the radiation field are found to decrease with dis dr(spgcq uhsci +5:y4n)qy7- r 6ady-tance 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 on 3i 5*()xichzebwk. woe instant at a given point itszxh co*wb3 k(i)5we.i $E$ 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 antennah-zs1eo ;hw 7z45writ that is oriented vertically. What should be the orientati h eht51 ws7;-4rzzowion 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 .l; vlyz2ou2s 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 5n 0 qb,/lpa rwek jyf6 7zjkfma+ub9v7b-1c-is not 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 wavev eii85xg23mflength 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 transp)sxfr (jhrbw4tk e*++orts per unit time per unit area is the+ fs4)hxbtrr(k j +*ew

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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 wavegl k.h(e+ 7*atqvfo9u 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 electre 1mkefc,- 5dn*7uewi omagnetic waves in order from longest to shortest wavelengt ,5cim*eeu-nf1kw7 d eh?

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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 dl1 :(hpw e zy1xk:hn;an EM wave has a peak value of 2.0 V/m, what is the peak value of the magnety1wz1;:pk h :lhne dx(ic 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 f:w1 -uotve3ffrequency 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 oop3ej9xes7 ;cf 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 transmitted at a frequenc00bhsg)ua blx c 45. opf6,jt7stv:sky of 7.2 MHzsx5)vbo7sb:,st 0ua ckj 0lfg4ph6.t?

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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 thev hbb8 zdbc,9; 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 microwavesred(-2ca/ ,y94b.gecrbj 5 f qg 8pwh5 id;mxp?

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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 e4jmby:jtu2;?

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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 lighnc: tj e30f8;sxzn psb 7rkh65t 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 the signal from a local radio statio-puq 8m4ijl,qx8j6 e u- t e8lqgnq0y+nnvf 61n 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 (t1mb of,*mhs3the distance light travels 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 ms azdkrvmk,s )0d i241nhfter transmission. How far away is the reflecting object?nh)2rkid k vm4 1,z0sd

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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 ha6gm(sm*e xe9 kpqsd /a8v20Earth (above the atmosphere) at a rate of abou0p 8/*m6akqas gem9x hd v(2est $1350 \; W/m^{2}$. 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 Eo;v:f;k2 3 fkmbcax8 zarth (above the atmosphere) at a rate of aboutkxoavc3f;: b8;fmkz2 $1350 \; W/m^{2}$. 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 fro 0evvc/ fddc+j:jgp *3m a 100-W lc:gv0p+def vc d3*jj/ ight 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 distance 2.5 m from a 10088sqlpi + l9pgqt 50dy-W light bulbd spl9p+l880tq5y giq ?

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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. (/.gi+x :noufi o3gk51zaqsdWhat is the average (rms) valonixf:.+ ukzq3d 5o1/gsa g( iue 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.gt1c/6/ aoyd6 wcys i*00 mm in diameter. What is the average (rms) value of the magnetic f6ia1 /y/ 6csto cwy*dgield?

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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 transport4z t a/bc4o 8idnsd,6yed 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 6tv aw*a -2itxthat 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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