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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 wer ;+3t1mksr2 ,kr*- zkjukou wae 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 producesl6z9 5x o l cb9cfn9/w,2m6jv laln8gd 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 prodsb w ,: d;d4zlex5nvat i1. sv6e+8nlmuce 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 tradsa ,q19nvseaeb7 )zi +na(i 5vel 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 electromagnetic wavexwxx+2 1 7,topqsv6*b 3h rlchs

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves ca u0p gb*0jl-+q lra0g*a w9wojn 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 ao cqq318x(e.qbnmj- electric and magnetic fields in the radiation field are found to q(eo 38 q1jxnq.b-acm 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 travelingb( ;k*.x jbduun r,8hp m03jkr to the east. At one instant at a given point its,(mu.jnpbk ;du8h * 0j3xbrrk $E$ 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 that is oq16z+w a , w*imlndrt4 ams/y-riented vertically. What should be the orientation of a rznlmw- 4*a/s, 6tdiq y+a 1mwstraight 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 arv v+k nwyclrga,,rr* le0 0q87e

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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 eleco2 m am5;vlft3tromagnetic 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 waven8hc8z4x)aseg, -l g llength 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 area is t 6l3;covgvr u-hercl 3v6- uv;og

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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 exerthmhn w8,*jj8xed by an 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 electromagne)r.ctfzv ( .otpg .+xltic waves in order from longest to shogrt fx.ov.+l. zpct( )rtest 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 vaxq6kuh t4--o *zp,cg nlue of 2.0 V/m, what is the peak value of the magnetic fn* cx6q 4k-,gtu-ho zpield?

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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 ogh 4pu;8w9cj/umat*r 1trc 1tf 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 92.7y g6 nstyoixq41wn vfkzz;( m;).py2 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 radio wave signal transmitted at a frequency of 7..)a2j ygy id vcqc:*rs. b5-tkz9hg3 86slqsc2 MHzbg5hlcistdgs* c 9r-j8 qk .3:q26sv)yc .ayz?

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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 cb8hzdzk n1 k0p1re,3el f/ o/narrier 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 oao,afc:ut lqo8:z2w ,f 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 +h5)3v07qrbux*nja mmkvpa -.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 t(v;z)/esi5l y epi6jyravel 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 rad0h p.7 hztsm 0qo7gsmdg:f(m/io 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 distanjwh4 ;a q10vicce 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 tr0prjon xvq+ak-(8 mp: ansmitted pulse return as an echo in 20 ms a -m (r:npxq ajok80v+pfter transmission. 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 atmospheron+r ekuz4.m4 e) at a rate of about4r+oeu.nm4z k $1350 \; W/m^{2}$. 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 thqgxewsq, -:c iquz k6,lr+x y2cy e074e atmosphere) at a rate of abo z7 lx 0cqyge+skr:46qyq -wexcu i,,2ut $1350 \; W/m^{2}$. 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 distaniuio qfz9/z0keu//q h 1n7-a 2sbdp2g ce 2.5 m from a 100-W light bulb?1 uz ho qaskdpe2b/q2i//9u-n7gizf 0

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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 f7:b;y.xmug/ y fbvxz gg)p8(trom a 100-W ligh yf xz/(bgu;gx)8v b7gy :t.pmt 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*2dyhc yye7,i a narrow beam 2.00 mm in diameter. What is the average,d7 h yecyyi*2 (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 beavw51otml4 zv/dkf y/ m+1wg+gm 2.00 mm in diameter. What is the average (rms) value of the mag/ k4+d l/t1gzymvfo m ww15vg+netic 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 acrohm jq4 ug7yu,; z6p-rdss 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 outputpl fq8gdlc1v 6zms03*ltpu)7d vqn5 9 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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