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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 electromagnetism were devel,bwt/8mag ; puoped 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 ljq0jj6h qv8an:6rcq4 qi5 i4 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 produc.h klg (un)55onwjji-e 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 vacuum huuv- : p0di+aemf11r3svu; o 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 79s2s2m6e( voqe eovf ecj)m:of all 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 tgvs cuy2+s,vt pad:8: hrough

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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 maq8/gtra2 m6s -ti 6p(h wqo ;vjho1au3gnetic fields in the radiation field are fo6 s8tjuq13o2m t /h - qgar;h6(iwvaopund 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 to the east. At pe gc61d/ i( fhtccv+/one instant at a given pointvdce 6c/1+fi(hcp t/g 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 radiated by a straight wire antenna that is oriehe 5gz4i09 nalnted vertically. What should be the orientation of a straight wire receivi0l a954zgenhing 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 wavefkw d3d. mh758 rli n0dhs7p)ys 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 electsu5.3cu6)f avoequlp:ky7 7r*4r e.zpltpv5 romagnetic 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 wavelength froox1 (o*f dwex3e3;v ikxm/3cam

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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 tran:trye)vu oe)ocfr0dt+ *vkd75m7d s .sports per unit time per unit area is the7cvk d0tmyerv):drde 7o. u5 +t)so*f

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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 60x+u(eqdpo texerted 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 correctly lists egtkz41wb u. upw:0 3p0ugx3qvlectromagnetic waves in order from longest to shortest wguwbgkp4qtvx1 3up .:w30uz0avelength?

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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 kgxl s5m:-l ;w odz,h*the pea;*w,:hzkm llosdg 5-xk value of the 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 the*et/9p zhtjc20ddd4h. 8 6iufzvlp7 yir frequency 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 *o hgbm0 ku qv3726hbtwave?

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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 t/3 .vmffyzrt 5ransmitted at a frequency of 7.2 MHz rtyf5./mz3 vf?

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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 carr +ao/9 6cwej 2cnl;1u8hx bzbnier 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 microwaveok (3yvyo)w3 r2ffe:xs?

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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 travelx8o hzl. f371 du5vtvu 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 t quij+va3;7.(suobd fo 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 t -rtsg:dfeiol 6- e62ehe signal 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 travels izjpuc mgnz,k.3qm7sb r9 5bc:eq3.0 sn 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 echogryj6qyq omwc)8 ;)o 5 in 20 ms after transmission. How far away is the ow ;qqo8jc mgy6y) 5)rreflecting 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 rata (gdh,h:/tw g v6uu ,wrm-fy8e of abou68v/w( ryhd,a, -:u wtmhfggut $1350 \; W/m^{2}$. 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 atmotgew kc33 t: o4f5y)qwsphere) at a rate of abo3f)qtwk:yt 3cgew5o 4ut $1350 \; W/m^{2}$. 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 u;/bxm2pb*f *id8ixojj84 -reks n wm4n)tf1100-W lj* 8m1xisf 2nuf4; rtjbw8o db4e -xk/*p )mniight 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 valuem ,y*ppz t e qiw8sszx8,8*k+5n1pe gg of the magnetic field at a distance 2.5 m from a 100-W light bulbpg,etg5, xz1w*s+8k8s*pmpy 8q enz i ?

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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 begcmr nnj,h9 ;2am 2.00 mm in diameter. What is the average (rms) vr9cnh ;j2n,mgalue 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 nar7kb7wlq ou0k7) zi7mp row beam 2.00 mm in diameter. What is the average (rms) value of the magne lukko7wip07 bqm77z )tic 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 7x8ctw t6jn jo5 i7c(uacross 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 poq p 85ki7fi0 srp4y4+cff *izwwer 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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