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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 electromagnet6b p2ytmod9 .i+ kgeq8ism 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 m5u,bvu an,toc w: )6-/a5k ynnwcw* rj.puu. 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 pu/( zzi.cj1f eroduce 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 vac m2pe35e),qma:s 9ytru uf(o (me,bit uum 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 wave-rj0ojen7. ht s

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves ca o6uvy* 7i2zr 2 /uggob xqn;elqg,s-2mi,w n7n 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 fields in the radiaty smgbd f206 tgvk,6(yion field are found to decrease with distkbg fm6v ,dg6(y02y stance 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 gb4d d; o4an0heiven pointo;hn44e bdda0 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 h1yr1;jj 4lh jradiated by a straight wire antenna that is oriented vertically. What 1jhj1;yrlhj4 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 ar)z (an.n5uzx ve

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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 eleuqf8na-dgi t 1+v(y 6kctromagnetic 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 wave /z8q. ,- lku8/5;.niehzprvxqh ffsblength 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 upi*8n u:gm ihz l;+uk)nit time per unit area is theh+u iilug z m8pk:n)*;

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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 elf-cvt*o kk pouu**0w )ectromagnetic 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 electromagnet+mw4 o(em-8u enzrrg1ic waves in order from longest g8o+ wre(umn4rz- me 1to 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.km5f duzw/u4ul o :7a EM wave has a peak value of 2.0 V/m, what is the peak value of the fk: 54wo7dmazu. ulu/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 frequenc d+qu1k **zq)cf +ihhqy 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 92.9-MHz radio wad 56b5f2jj ,*cgsmxwove?

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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 sigf mihoh.2r /-hnal transmitted at a frequency of 7.2 MHz? -2 /hofrhimh.

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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 jf*w4y-6u(bq)jj uaejg+: sd 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 mmel zp4j0l n2 mit5s ut-v49/i4lpvk-k 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 trave 6jq,jrgqqqzdf9i( 46 l 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 tls czho:mh ;g+, i68 6,xcpsk1.0 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 station cxyd/z 74ibn(y zj8 :0zy,kol 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 (t0n iioxza3p+e lvm9.6 he 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 transmittem; y(, plnv8lrd pulse return as an echo in 20 ms aftm ln(;l,y 8pvrer transmission. 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 the atmosphere) at a j-fis/ o4t6;fcc 0 drbf8al3x rate of abou8flfxcd3c; s -oj/6rt4 a0bift $1350 \; W/m^{2}$. 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 atmosph ,x4y, kzg:3uqrkb 5dbere) at a rate of about d4xb3zu, r qk:kb,5 yg$1350 \; W/m^{2}$. 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 y/ 4.de0is2bmv)pp;ne j q4qw 100-W light bul m4inqj vb/.qy)e0s ;pd ep42wb?

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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 magne lq :57 jqpbhn/h3j2nttic field at a distance 2.5 m from a 100-W lighthb5nq l2qj7p:n/jh t 3 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 narrow beam 2.0p1 i r*mrsk//u0 mm in diameter. What is the average (rms) value of the electricukmr r *s/ip/1 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. Whativl7 4juwyo65 is the average (rms) value of the magnetic field? 4uv57 l6jwoiy

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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 transpor0lvw ckv.+2rm ted 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 thel9 spyb 3;4cws 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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