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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 electk-8snxln or: nx53m e0romagnetism 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 produv a-t 28*eabu5+ hi2jx8hufvv ced 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 fieldgss)gvw vl,g0.5n4ks 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 throfstp+g *ml5 zzy9svk,6z; ( xvugh 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 electromagnetic q (l.f;k 3mt7qk prt2swaves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic wave2nb3 ufrcijy-;6p0t ys can 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 in the radiation field arx g zao)mugg18c(46w ue gz)(um 6g18ogucw xa 4found 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 eacp yj0/vmgh4yg8*;eloc j7 (sst. At one instant at a given point its 4j gge8(l s*7h mvcycp/o y;0j$E$ 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 strsv c;+wuf1 a6xaight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It should be+u6vw1fa ;c sx placed

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves ar3gyp y/6yk re-tl +kj2e

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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 innpp a9 +8z(aa d zpgd90c1(qmc 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 wavelength frovhg eqffnb;s b*dpm4z8r4m 2tn;d9 ::m

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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 t2mz m/mozz- soje7c(e; ; b:imransports per unit time per unit area is theo;/mz(s z7-ce; zim 2jmoebm:

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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 wave is calleydny:un, hj h33lg14s7ru o3id 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 cx fo y -ll31zg :4i qn/*-njom+fiyx/eorrectly lists electromagnetic waves in order from longest to shorteqeiy xfnz3-x o *li1fnml//4+gy-:j o st 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 wkh k cm-.c*i6dave has a peak value of 2.0 V/m, what is the peak valcmc-h*k6.k d iue of 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 67*g zv pkryi5 (tjrqcw(u*;xif 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 92.9j yeq.j 977ni*ckep,axpvw0- -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 transmitted at a frequency of 7.b* sx2d kf6* 3 -,zhelhp6ruzt2 MHz2hz 3bd tu6rp-fzke*6,l xh*s?

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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 WBRN 1460?6huxqh0t-th/ud - zp*

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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 z s9 6ezob)6t5zqmh 2zof 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 travelvddf*gm )h;s; 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 ligh zc)fk/ b;ty3nt 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 travel 20 vv:lk3o +v,0flob 6tymiles?

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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 trvhq7 dx*+us3z kerx2ps 9e4:6) ryv afavels 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 indica2zqe(+ pe:5mrqewof6 tes that a transmitted pulse return as an echo in 20 ms after transmission. How zq26mrew5e:+f (peq ofar 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 (abh7l e6 mbetb:d0,(xzmguz 5e7ove the atmosphere) at a rate of abouge7hb:tz6l e(ezb m dxm7 5,0ut $1350 \; W/m^{2}$. 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 (above the atmosphere) at 5unym7d/2k(h. i y g5ot0zoica rate of abot0cd 5onu(hy2z gym5.ii7o /kut $1350 \; W/m^{2}$. 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 from a 1frev o4v8xarva:xu+(d: hm t9 +8wrv 400-W light bulb4raafvw8+h:+ : x rrt(vxv4u89edom v ?

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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 td(,k qj/zdwi e95bymb;+1cldistance 2.5 m from a 100-W light t +/b yq(1e5lcmw;z 9bdkjid,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 diameter.v yt32c;tlho 44h9htu What is the average (rms) value of th;9y 3t l2 tht44hhvuoce 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 narroze we/h ) (ey5 2gzez-mx,6qeo iis8,tw beam 2.00 mm in diameter. What is the average (rms) vi(e w /ym,-i 2eze , 86xhoeqtgzesz5)alue 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 transporhubiai20q*; k * 6tnsuted 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 S. 6lcets dpwgy8-,2rvin(l8cf ry5 d 1un, 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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