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习题练习:Physics Unit22: Electromagnetic Waves



 作者: physics   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 fo;ch5 iss(q e.nr 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 produced by g1-l35njmuaxy;8 x e sf q-ir9a

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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 a.iiqr/*q b*i,7eywbh

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic wxzoyb:r-.cu *) vgpki3p+ 2eri w5j/ qaves travel 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 wavm 2hwa:cl+1 vbes

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves can trn7;i6wphr -(kep0big/s k*ujrt ;6kuavel 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 electr0ux 24gjvlnfwlyk365wi48k iic and magnetic fields in the radiation field are found to decr3nx44liky0jwu6lf5v 28 i kwgease 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 east. At one instant at a given poi8q7 t9lv*wdx mi ;84cjr)uqiknt itsql8qt4w j ; *dviimc89k 7)rxu $E$ 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 j;w6x gjsw jp/ o 0lt*i/(6jiyradiated by a straight wire antenna that is oriented vertically. What should b (o/tgi jsiwx; lwy6j/pj*0 j6e 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 waves are8 bum ve43m+jm

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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 elev8: .hr2kwy /l70hhvq1 tlbeqctromagnetic 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 wave/b ,x.3hjpmr flength 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 thfmrsi* t)tiz x/ **;eyspkfj1tv)y4 *e ftjv t**p4f) s/;i*ykyrs mi)1z*etx

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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 electromagnezp)imuc 2;p -4*u hfeatic 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 h b 3iaswa0 vw;tn:p,)longest to shortest wav0;:wa, v ab thwpni)3selength?

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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 an3a6 jr(now .q3rg .otcg).y1 q;owmch EM wave has a peak value of 2.0 V/m, what is the peak value of the magnetia go3;thqromq )rn6 w3(.ycw . o1gc.jc 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 wavg,tpu w5m6t.ivdic,ge74z 0 xes 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 wavoj v )gsdxbh(1 0d8i*v 4 gvebi,vg/p4e?

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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 7.2ft;s;( r(nx -8p lgtvz M 8-t(;nfvzlxpst g; r(Hz?

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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 stationy7sbw ;u /u q 0o:dvqzn0u0f1w 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 mm microwave l5okde,of.: is?

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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 tra:uihytn21 3s9 i tfh6kvel 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 lighths)3*zk krn )w 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 mighcs,n.2 npi2les?

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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 in a yemh9uol l u)/dj fm,o84ar)?

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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 ms 5jh (xauosy:, after transmission. How far away is the reflecting objec(,usay ox5 hj:t?

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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 reacdxhc r (w0j ycdcrh wwm5l +92mpv6s3 di0-..bhes the Earth (above the atmosphere) at a rate of aboc( 9cd0swxm w rpi5cy0 2r+d-h v.3wd.b hjl6mut $1350 \; W/m^{2}$. 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 rea8:nvbfb; en:h ches the Earth (above the atmosphere) at a rate of about: fehn;v8n:bb $1350 \; W/m^{2}$. 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 electri-v9a fpun 91(ve tvs+tc field at a distance 2.5 m from a 100-W light bul pf+(n- 1sttve9va9vub?

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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 dist gdlu:s0*sbldz y:1 )mance 2.5 m from a 100-W light buz:dsg lb0 :l*u)dysm 1lb?

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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 x9q uh +.pjddobh gm/l0u 1k*4a narrow beam 2.00 mm in diameter. What is the average (rms) value of the electric 4+09u.pklh*g/1obuddh m qjx 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 narrckwq 8u 4x83)lkthgbifw926 aow beam 2.00 mm in diameter. What is the average (rms) value akfi6gw88hu tl wq423ck)9bx 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 acrosrogvv*v :8*d2 9ujzvf 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 oz 4m/dj h(h22gveg at+f 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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  • :
  • 总分:35分 及格:21分 时间:不限时
    未答题: 已答题:0 答错题:
    当前第 题,此次习题练习共有 35 道题

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