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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 electroma: v8wgy42xh)r hhs.eb m4 ij1i(cyqi* gnetism 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 producecqqq )49j ;qfqd 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 produj+xwimkrbg1wl)q3 / ;ce 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 a(z g4q7c doc4vt

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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 o*h yegjd:gun01t -h s8f 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 throl0o bj uc;tvp4kh 8 o0(dze2*tugh

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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 7tltlgrlo9/ k 1 87oyt:cixic 2va1u2 field are fouig1y v 7 72oiar2ttll9l:cu8/ t1kc xond 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 easidh5s dv-t7m(t. At one instant at a given point it(-5m sdit7 hdvs $E$ 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 ta froqa5p)vp6(0+s hc hat is oriented vertically. What should be the orientation of a straight+ aqs5) v cpafr(ho06p 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 3d 1,7m5pogwk m*lpxxw)1mf9oct e o8 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 ecbw3 higa.gi7u( k q-2vgh;r: lectromagnetic 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 waveletat*z; bb,c +, bh2lowngth 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 *f/hrzoq.dhs x11 e+a( zb zp7wave transports per unit time per unit area is ther o dz(fs/a 71 1*b+.hpzehzqx

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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 electromagnetic wanv :cmg5a;,; xxekya/y 51lxuve 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 oau5j a)6e vbe:gd6wfk4h /a(electromagnetic waves in order from longegu)fk56hvja a/ eow (b: d4ae6st 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 t)q;;44vgoyvoucf;mb he peak value of the magneticfv;bg um );yo4qvc4;o 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 ligg--wv mkev*ets+ 7- ahu(fd1iht waves 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 wavelength44l*17boauipukkjfg8rmq n7 jf /2 t4 of 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 )+1 oys69iew55ib rbzw9 agfl radio wave signal transmitted at a frequency of 7.2 r+yi 5wwi g6b9 5)bzosf9el a1MHz?

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelengt2a9 uvti1r3j;xj6y,: n2dglun 8j v gyh for the 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 frequenc anykvro+,f j8;q7nf:+mv)o hy 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 travel in 1.0 9(lv k7ax-ne7c -+3 fqovaytvms?

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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 te.h 2josz o,5pum* ga2o 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 tr7 2cggr57 asx,m5fau.sx sn)davel 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 di) pi fya4tb/zv6a+p*c stance 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 indicas gtlfml+99 k-tes that a transmitted pulse return as an echo in 20 ms after transmission. How far away is the reflecktms9gll -9 f+ting 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 reac51zruu d*ipm +hes the Earth (above the atmosphere) at a rate of abou+pu mu*r5i1zd t $1350 \; W/m^{2}$. 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 (abovejmsphq z0euo k5un- :3:b4o :b the atmosphere) at a rate of about 3 :op4 jum5ezsn:oubkq:0bh- $1350 \; W/m^{2}$. 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 froteod7nw0sx0 sbh 1( p4m a 100-W (bsnxs 0pohwd7et041 light 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 4s; u hm4au83i ego6rgthe magnetic field at a distance 2.5 m from a 100-W lighh6ge 3au84g ms;i 4uort 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 out6upzb;mttnmk hca-i 1xt y5s2 ( ,2n3v a narrow beam 2.00 mm in diameter. What is the average (rms) value of thevm tn1s it5 tc 26pb -z(nx23,ymh;aku 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 diamea)t;. n td1gkster. What is the average (rms) ;ad )k.gt1t snvalue of 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 transported5dzkr yd9)j7l 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 outpu *6a f e+(geqy)l ijdfg+h6wk1t 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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