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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 develo.*curar3kwju4 :j) fg ped 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 t6:m yi0te1qaproduced 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 8, i(i hs3o(hyq;hq keproduce 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 t6e p*:;9 exfm n m5 t,xu-gicdmi7hq*wravel 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 el81 g ,tehkq;9vt)nl ;h djm xa9w:ae,zectromagnetic waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves cani hb:m+3 gaai4n,*fccg6eo2dwb g i7 6 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 fg j;ph5estf4n6 3d- uin the radiation field are fo gp s 6dn3utfe5-h4j;fund 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 travelinj ))hamcfc (*qsjt*d p*h,6(aj biwc3g to the east. At one instant at a given point ,ai hcp *jmcchq)((wt*6dj*ab)jfs 3 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 b8ptby;8 scpu:wb xzqs8b 6 +k5y a straight wire antenna that is oriented vertically. What should be the orientation of a straight sb b6z5xw88qk bt:us +8p c;pywire 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 rkygrro 975*kre

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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 notfj*y)vmxa i/cu94w3b 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 rz9 )fojm ;8sqvtdi- :in 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 transporz,*xma rwqd7 3q4wdz, ts per unit time per unit area is thezq am xd37z d,*w,w4rq

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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 anjut6+w607c o nlhjit8 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 lists electromaa wqmh:/ag1;ngnetic waves in order from longest to nw/ma;1aqg :h 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, whj o29dgqcr +qb,r2bxu nm7wa.542 j rxat is the peak value o9nor27q x,j q.rr jw udab+2 xg245mcbf the magnetic 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 thdz y 0x+v8p3 ui0ascij4u6gs+eir 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 radiol*fbq9j( w1 bm 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 w x8zov: b;pm:oave signal transmitted at a frequency of 7.2 M;mpvb :oxzo :8Hz?

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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 station WBRNrzjvgofhy cjwx)3nqf+zn754- z7c/ 2 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 s10-4rxlc)sgwd;l3pno 8i3 eyqhzo. 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 s5ru6 *(7gnpaw.hzx7w7j mum-g ulk. 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 light to travel 1*l:gsx(ilc (t mhw(nu i; /pz,.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 st rs,nre* ,5okakkk 7w8ation 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 distbt d4oxn:0wjl-;q,w b ance 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 indicates that a tra+7m .hp*xqq pvnsmitted pulse return as an echo in 20 ms after transmissh*qpm v+qpx7.ion. How 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 reaches the Earth (above the atmosphere) ojza1 ng 0yjq 4+0fu)cat a rate of abog 0)fojq4az+10yu cnjut $1350 \; W/m^{2}$. 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 (abovjsz,t(0zf kwh i((s.l97vggve the atmosphere) at a rate of about. lshiw(v sv kz9tfg(0gz7,(j $1350 \; W/m^{2}$. 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 dist,q7e hmns9bbh964 dr oance 2.5 m from a 100-W lhon67h, qs9d4 bb9r emight 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 distanj(d 166 q eit(n1hwdghce 2.5 m from a 100-W light h1616 tdn( qd iehwg(jbulb?

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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 diameter. eii.r6pefzqmct.p f8-7b0 8f What is the average (m.6bfc-8.p tqi8z f0ipre 7efrms) value 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 nallkk/w n mk 0t*))dbr9rrow beam 2.00 mm in diameter. What is the average (rm 0r*l)9/ l)bndkkkmtws) value 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 tq tsrx s,9s9:oransported 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 2cw3.*pg6wry ao-v:aitfw bu z8ul, 5the 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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