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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 electromagnetism were developeum(pqisl/:6i lpf p43 d 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 is05odb ih*fg i + .:2top tnouyb0;g)az 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 :9u lfy5q, uszj)6kmkfield 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 waves travel through n9 ow nn;w9zyok;v8bhdltly .+ 2fa/7a 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 elec,dhz:uy uev97 5plob5o/6 zjt*.u lyktromagnetic 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 tr;sdd 5 js1u2 4ob.pq2z6hjqll avel 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 radia3wz h ipi3qg70tion field are found to decrease with diqwiphi7gz0 33stance 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 hlnw6(i ru7 6rinstant at a given poin r6w6nhu(i r7lt 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.ya-sc/up * +qqcspx stdz0 34 by a straight wire antenna that is oriented vertically. What should be the orientation ozcaqdx ptc*/ss+3yupq- 4s .0f 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 wave; v-(b3*p , hp3i /ifbizuuhbss 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 electromagnetic in nf z ,+vqlsfm8,k-id 0ys7pm8 cature?

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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 wavelenp zru ,w)ziob8eh; i(9t*x4jz1 bag-ngth 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 ;1t9rq.b7jf khc: lvo per unit area is thervqc.okf9 j;7b:l1h t

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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 electromagneti q , 0;cr(qpdxbgeqlv7,y5 ld-c 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 )n2qep 3q .rfymn (9e r/;etcpcorrectly lists electromagnetic waves in order from longest to shortest wavelength?mfprtc q3n./)e;(pn 2ee9ry q

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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 or,z ;d:j7igj/w*kh i uf 2.0 V/m, what is the peak value of the kzjw7i; , u*rij:d/ghmagnetic 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 waxwlhja obua0d 9),7s1t 0d x(qves if their 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 omt/eo71* vqli3wg :id f 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 *l .gz 5bbcj xfl1r t:x)8dt*lradio wave signal transmitted at a frequency of 7.2 MHz)bl.ctft: xb*5zr g *d8ljxl1?

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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 carri5 qxl gr98z/,w7yxq h.ruuf5 wer 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 microwa3.mhh n 6q5):yib 6llnha0 daaves?

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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.bjg0ic:uamp y1-3nu: 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 (/m9dhaxa rp, light 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 station to oh,,oee z rlc om0o29eh /(9nztravel 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 m ;(g7). bqo)v7n 6uhtjsr mtz/ gj3azyear)?

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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 transmittuv4 xrs7 flkjj0 4f k6txg(c62ed pulse return as an echo in 20 ms after transmission. How far away is the rxvsujrj06f4k( g24 xf67 kclteflecting 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 (abovy:ep 8nck i:j8e the atmosphere) at a rate of about ::k in8pc y8je$1350 \; W/m^{2}$. 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 ( /odtzrmfcijd qbo9575.ku aaz :k35+above the atmosphere) at a rate of about oaq97.+53adfz:d k miutj5 co5 rkzb/ $1350 \; W/m^{2}$. 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 distj08 ip,wbnlt:i*w hdz6/(.vzu2rq dd ance 2.5 m from a 100-W light bultr iw 8v hz6./izdl(,nj:*duqdp bw 02b?

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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 valaay-0 sj+cqu) j3 0obhue of the magnetic field at a distance 2.5 m from a 100-W light bsc)u-b0oa a0 h+j3qjyulb?

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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 ou qh 8a oek)pqc+.dk(v2t a narrow beam 2.00 mm in diameter. What is the average (rms) value of the electrqakh2( d)co .qpev+k8ic 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. Wv phv 3m9mej-ig9e/r(hat is the average (rms) value v/ rp jvh9igm (m3e9-eof the magnetic 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 tja/u-d p/h6 j9cpqs+tdn+h6 fransported 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 powerjrmf)+8z6dwo 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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