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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 electiue24*9x zfji*c5 ey nromagnetism 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 isfd;h2sp fl vh 8lxd:fs63*qdls7xd 50 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 wx uh,yqk)6mwe,3 o1s qill 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 waves travel thr101 rumv0 hre6adypj; sbmx0:ough 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 electroma/ag207*sdj5 goakeqa gnetic 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 thcf.ueqs :,x3grough

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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 radiation fie.ulu 3- okasfel /5qn0ld are fou 3l/-l 5fak0nqe. suound 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 one ins0ekx+jez-mov 2+.lt /uj9hfi tant at a given point i- vj t.j x+o+/2l9iekz0hfeum ts $E$ 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 iu)/ wi i0hvo/-7g l5cf0xtnpn s radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight w-50/l7ii0opct xf) gn uwv/nhire 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 a nt,0+a d*ec;a,kw xtare

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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 n)9ent0 6 tlaioot 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 wavelength h6audu o.:t7f73drspfrom

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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 unit area is pb(miowm w +lmxa 3):1theowxw:l3b m )p im+m1(a

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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 e-dev/sc xbplt/x o0cu7z. p;7xerted 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;h gzq6g b/5km* wc.mx lists electromagnetic waves in order from longest to shortest wavel.qc w;hmxg5 kz*/6gmb ength?

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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 d:d+etae:v xc6g0a*j 8at,h0uuqk u) an EM wave has a peak value of 2.0 V/m, what is the peak value of the ma va0uj:,q8add6 *)k xge0a utt+eh:ucgnetic 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 t4czv qp/y9q)5oh yfc-heir 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 radio7qe(6 : pdcmm w: nghyw1kw*q5 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 oos*jkxr o42oqtsf, 4-f a radio wave signal transmitted at a frequency of 7.2 MHro txk-4*oqs s 2o,f4jz?

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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 sm cl*cg4:c-j uy*,f bbtation 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 frequenct)7y:v93vy gw2 a hqo6z l*urny of 20 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 tzsxn;3 ,6xkn dravel 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 ldbq-leev,lxc m 55g 6(ight 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 fxwd1*+m 7wk ynrom 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 in a yehyrvsa*6fce:pm;3, v* z:h uear)?

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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 aspq)lg4 r. lbt8h;mv+c- s7qnx an echo in 20 ms after transmission. Howc. 8 n +t4q-hlmsp; vq7)brglx 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 reachesu;dodk zvf5;/xew m1. the Earth (above the atmosphere) at a rate of abozxd.f wu1emk5;;v do/ ut $1350 \; W/m^{2}$. 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 reachea)l:otu4 c5 xllgh:z9r zw,t 6j/jf w9s the Earth (above the atmosphere) at a rate of about lz4c gj ltozt,/la 6fw):x9rj h5 :w9u$1350 \; W/m^{2}$. 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 1eyoq*ki,;dyv d1tdgjr*8 5n distance 2.5 m from a 100-W light bulb?iy81nj yd qtr 5;e*o*g ,v1ddk

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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 h0k ubunn(1myf f4( 5ya distance 2.5 m from a 100-W light bulb?( (uk nybf 5hmnf104uy

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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 dia8tir;mr in2/(vkp t:fmeter. What is the average (rms) value of p(r82fv ikr/nti: m t;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 rvsklnv5al5 khbln:f)29j/ep0:f l6u 7j)siin diameter. What is the average (rms) value of the magnetic fieldhksb/ :0l r 2j9pe)7v n5fasu :l6 lkvl5jif)n?

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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 nukq4/d gmg+aaxx 69-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 e(dud mj.ep *,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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