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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 f6pse j, z 3j.*c7ebfafor all 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 ps9-r ykscyap rd1 wqg+60j0q8roduced 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 produce dj 6mlcyy)x1uf 0z+ dvs+*pbn)r+ p+sa

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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 v )m4:*wsvlwc x4m/stj2ab lg(acuum 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 eleu h: owfp:aa :js*ol/-ctromagnetic 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 thudk)z yohu,bx i 4 dibo1)5/+xrough

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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 eleve1ejaiiu7+l pa72/mbwtg 1(+ k z by-ctric and magnetic fields in the radiation field are found to decreeyb 1-kzi1lu a(7mavbtw g7p2ej+/ i +ase 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 thneh r8*r 2sl5bug of(1e east. At one instant at a given point(e srr ngf h2b*85l1ou 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-nj4c v fv9a:ee3oo8 d0s4 owo is radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire recejon84ov0e93fd-4e avsow: ociving 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 ar-+sftz9yo-u3/q jtx.xqddda43 im +h e

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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 in5iam 0v9zx*bl yd-mc0 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 kvwy* *nw)*ljin wavelength 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 arp8nas573 wcx gea is thep wgxc sn3a587

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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 652i( ae, brobfaeed 6z7txa qk hd1-*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 electromagnetic waves in order from lor hm x:b;+cej qhl- xrr502z8qngest to shortest waveleng +xh2x:8brm5q er; 0hzjrlcq-th?

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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 )i.r7 uaip/bh value of 2.0 V/m, what is the peak value of the magneti/ .i i)uhpra7bc 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 ofdfc)d5 w/:,zi c//sadk n2btu light 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 wavelength of a 92.9-MHz radio wk o jueoo rv y*o3t/8-:og,h8nave?

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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 tqpmlmg - rku+).bz;/ransmitted at a frequency of 7.2 M.lb p;k mr-zgt+ /mq)uHz?

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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 carr78 w:ijkyq x-oxa+v/q ier 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 me/ + k:rif*prxq -*cr pt3)mrxm 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 (x0e u6mre.* ooa fff2ms?

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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 tqa 4vfsv r-+l; l;i/ +neue;tfo 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 st,g;8 9wqen0fi. u i)6trzdasignal 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 j(rm.f+o1imh g ag08 win 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 ug-o7fo)0nz: rp +vfctransmitted pulse return as an echo in 20 ms after transmission. How far away is0rcvofn): f+7- gpzuo 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 atmix1.l/lz i uvo3xa xs6dcj7 24b2j5rnosphere) at a rate of aboulnsi jx21bl2c 6 ur/.v5jd3o4ix7 axzt $1350 \; W/m^{2}$. 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 *dx .(vcswdmpp* 1*kpn()l;wbu ) b nureaches the Earth (above the atmosphere) at a rate of abo. bm np;lcwbxd)(1npp(uu*dwv )sk* * ut $1350 \; W/m^{2}$. 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 distancy6wn1l0cat/h e 2.5 m from a 100-W lhl 6/wna0t1y cight 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 distance 2.5 m from c56 j h5qqu :h52kchfya 100-W5hkh: qy j5f6cuh c25q light 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 out a narrow beam 2.00 mm in diamesvf 1scx l g2py8mk,sa 6om8(8ter. What is the average (rms) value of the elsx8( y c8p m2g,smkof6a8sl1vectric 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. Wha/ ,awgwx0;d)o0 u lswjeup1-yt is the average (rms) valu sope ;ugjuwy 01 ad-wx)w0l/,e 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 transported*(y)ib9jyhx g* kox ,uql;p9*d9fcw n 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 output of the Sun, given thato xt jr, xj27czaiw6q5t9 s6/f 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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