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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 a na7+ :hi8rboxll 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 producu* izciv 54v7g)9idj bed 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(3 u r54m2n qupnv.dhd 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 wav m i62x94vptlpes 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 all electroma9.p5hg)ad5tqd e3rkc 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 lazz 13yf+ nqsn;-h8n can 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 radiation field ar.q*xro9jvgn2 t7 ;; q 4ljcssge osrvljjtg.*gq2 ;nq9 4xcs ;7found 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 wq9*t 5/pazjbbh-x;ri c *e:pkt7b 1xwave is traveling to the east. At one instant at a given point its pt;*e j17 xi5qw/p*ahc9r-bxbk:btz $E$ 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 q-nm 04p-epa iantenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It should- 4- anqimpp0e be placed

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic wavesjjo;ragz;4ty30q vu48t1ju(c 3 eosn 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, whicvw;7e2p3 yf+o,mdds4au h;yetynv(1h 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 wavelqpx)t8 6kj(z yo,jb /jength 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 unit area is thz+ab+o(,wd abk +jv pb3(im2wed+a+ mzapw bk(ji+ bo3vb(,2w

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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 electromag vvgidu1 fn:e*9w4xpk58 j5gqnetic 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 followingcoiuz/0v;,w pspumkj:pd1 e; ,m .y 7g correctly lists electromagnetic waves in order from longe ku;;c,s /u :yj7 iwmzgd.0p1eomp ,vpst to 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 EM wave has a peak value of 2.0 V/m, what is the fu w5/,rsnm4. wg9mnrpeak value of the magnetic f,5/n rmu4fwwngm9r .sield?

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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 f(06lfhelc n73s j g1atheir 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 9e ha ,eyokdj1 yh0qz g2-)0kl0 x7gvba 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 sc.w;;r b ;iepaignal transmitted at a frequency of 7.2 acrb.;; pi w;eMHz?

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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 . x.sm:3y3ytqskdv9 e)ufs6b 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 micr b bm- 1:/9m hkf/mc tczk8tzh)gvkk xs)6je.8owaves?

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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 b *jviml,ba :81.0 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 -; n aec(j:vk69e21 umrwzoafsre7.d 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 f7 o 6ucc;k;9tk g3mchbrom 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 tratgln(ow,7 p5g vels 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 echi 9)m;p+n rkqzo in 20 ms after transmission. How far aw);p z rqni+9kmay 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) a.zn-e2rj1d0dzo t+r co x8;dnt a rate of abou -z82ortczxn+njd .d d;o1 re0t $1350 \; W/m^{2}$. 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 Sunltkzh.lx2 5:xz.j-m p reaches the Earth (above the atmosphere) at a rate of aboutjx llp-z .mhxt.k:z52 $1350 \; W/m^{2}$. 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(k00stx dt+o t field at a distance 2.5 m from a 100-W ligh(ot0tx0 d+tskt 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 d jch l 36h:gcww:-9xzqistance 2.5 m from a 100-W light bulb- hwqg9h z::clj 63cwx?

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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 diamby;5 /m)a 4rvgvbj4fueter. What is the average (rms) guab;4 4bv )j/f5ryvmvalue 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 2.00 mm in diameter. What is the avern8c hnv)eux7-zncd jlv)4:i5/rgsu5 age (rms) value of the magnetic fiel:ne8r ucjiz/c lvu n)5)5hnsv-dx7 g4d?

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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 acrosdsy(o m5lt0c 8 liq::ms 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 th, ud,:czar 4g pgg2r2 *ijyvx365 yndge 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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