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习题练习:Physics Unit22: Electromagnetic Waves

 作者: physics   总分: 35分  得分: _____________

答题人: 游客未登录  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 al8 ipql /y)w*dt; rnzr*;+trd yl 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 nby)v pixis7m2qvp+r:/2 u;x 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 field will: (x6 /dpajeiuu6ru fbmsw6*, 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 a vaceateoaq(+fn 4* 3 h)ycuum 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 electromagnetic s r tx(o1/tylss 4*q,uwaves

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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 thropwlgos u.(tq, /(m :xlugh

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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 elec:3: fmpk nyh8ptric and magnetic fields in the radiation field are foun : :nhppmyf3k8d 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 travy-3)c 8bl rxqt.fg pjbdrj785eling to the east. At one instant at a given point itjr3bpxb)8rg cytj-5q8 .7 flds $E$ 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 radiatednz(6mwk8;chiu / k)fu by a straight wire antenna that is oriented vertically. What show(uzm) fin/8;kc ku6huld be the orientation of 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 2miqa ,z1yi1ds 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 electromagnt;lh( 4*fcttiz g8tf5etic 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 in7 yp0o 7volf:x 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 e :h/so 5o*zh+pjny;ounit area is the:ehno 5+z ;ooyjsp h*/

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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 wavedtf5eq;mx+hrxn w764 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 co -utnzt.vus-c +/ tbo3rrectly lists electromagnetic waves in order from longest tuv.3tubt tso -nz+ /-co 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 w)x ,izv:;r8hn crq azj8s:jj 3ucqk:)ave has a peak value of 2.0 V/m, what is the peak value of the magnetic fi ) u r3jkq;s8:q:x8,jjva)c :hzrnc izeld?

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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 their frequ6h3l54 p2a- yiblqcx sency 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.fz9wlq* -ck9 kmyu)s99-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 signal tranu(3;lz7hwtq xez62e h smitted at a frequency of 7.2 MHzh(;63uxz7e2z thl e wq?

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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 stati qmfwiiz: 7:e k(yg.tkb6z 55b6k *zyvon 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 frequenctd80-+ bfuhaxk bp/2qyc1 nf6y 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 ms+e a) ryd vpxydl./5ro3gf-j6?

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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 travepy-/pn e7g ck,l 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 tralxiq5- 2 zgvq,vel 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*+szk68y4iobky 2 f;d4 ey l3yt ymrl0 (the distance 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 transmitted pulse return as an echo in 20 m;e. a o bt0ey6-n w*umi:rs (,idvym6bs after ( b*vwt60i sid:6o mm,- nb;ey.yraeutransmission. 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 El/u)zc dwi17m bc1z-t arth (above the atmosphere) at a rate of abou) lc dw1/z1cu7-mtzbit $1350 \; W/m^{2}$. 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 mbjh;,g9u4qa (above the atmosphere) at a rate of abou,ghu 4q jb;9mat $1350 \; W/m^{2}$. 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 e5a r6utr*md (rep. )t;rvwhx0 f)lj. hlectric field at a distance 2.5 m from a 100-W lix5rl pr).vh0 e6wrhttr*afu); (j.md ght 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 magn ze5(oisunh 45etic field at a distance 2.5 m from a 100-W lighu45nesz( ohi5 t 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 mmxg(227afae 5ab,cc tq in diameter. What is the average c7a5fqtx2eg2ba (ac,(rms) 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 narrow beam 2.00 mm if2m)h a(qg ;eljuk9 mpuh* :h7n diameter. What is the average (rms) value of the magnetic; humfpmh *uegah)qj:2k7( 9l 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 acros/w 207:vjq:xrtbxul g s 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, ge/ikf3mw )jx;iven 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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总分:35分 及格:21分 时间:不限时
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