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习题练习:Physics Unit22: Electromagnetic Waves

 作者: admin   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 all electromagnetism were develop eat(a/mc+-r qed 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 boqqq vmq2kid;3 pl1xz y. 5;py46d;zproduced 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 wil;*g*pq 6wqbivo ,j g0hl 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 t ssqofb f 1dds8),15bcravel 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 o h-+mezcc1wf+pp rj,:/ap- ,k s zew3wf all electromagnetic waves

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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 throughstrq/(l* h wf21 d0exahx5pcpvr3,,e

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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 electric8nmdbet:9 72z(bovai v +dei 5 and magnetic fields in the radiation field are found to decrease with disime( iv:vb9 +doz5 2t8anb de7tance 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 travelingt6a.wdbil/ g* *o y(eego2a)p to the east. At one instant at a given point g*d b6aoigae(tewo.*/y l) p 2its $E$ 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 orie0z.of k1 avp,anted vertically. What should be the orientatioav.a o1k0pzf ,n 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 8/19 8h qfiji tdapx fqql+9/care

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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 nq c *, 1nxsr.jon ug:il6:;abzot 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 in waveao g1 i1,dt4qff:;gtulength 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 w erof(6u5/mnoh4iz z5y;. qw 9 pm:yeunit time per unit area is the if w mo4eh96zy;nop:zyr5me5w.uq (/

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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 ev rjk8 ) 8a*.1zowdrv0sv z)v xk;bue+xerted 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 electromagnetic waves in order fro8z5*a /pt a,2 tqxfnm3zd5iny4 5nhcom longest to shortest w z2hnai5non4qdza55 8,yftx/ pc 3*mtavelength?

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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, what is thewvof8r lut+k46:plm 6 peak value outf 6ollw4k:m8pv+ 6rf 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 lw+ hli0xaa5 8pight 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 92.9-MHzdzgxt0g0 s r nh :rp04-48ydgt 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 ofzyf/9 e8pm c+f a radio wave signal transmitted at a frequency of 7.2 M9zy +fcp8ef m/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 statio cme o0tffold*v4n f:vr- )7c+n 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 ubkv-)qo: 5yu6fs z(dgw yt 83of 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 o-gbn vpii33 .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 trx4m9dkks 0/gzj y,fn 4avel 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 statio:83u tk rr3axtn 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 distance light trkjp*mscji7o3lk)q - ; 61cc aoavels 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 transmit1j xu6+ muwmjhg58p+oxyi(zct sp32 +ted pulse return as an echo in 20 ms afte3+1 mympupjxj2(+iu6 h5w xosz 8gct+r 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 atmoe.m-+q en 5z6v bq8ioqsphere) at a rate of about 8ei q-5meon+6zvqq b.$1350 \; W/m^{2}$. 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 atmos05 op -ezso-nrbxb* s7yfdudo-9.ap 7 ,r rql(phere) at a rate of aboutd.dp0(oyr-frop z7,ql 7b*s9b-n ao- uxs5re $1350 \; W/m^{2}$. 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 ele1y2n1n)diouow ytxrv, op/ 7-ctric field at a distance 2.5 m from a 100-W light 2potyo7,xw d1rn/nu vo1- y)i 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 b1mq5hli +f,ef y pi-:gb zy/:the magnetic field at a distance 2.5 m from a 100-W lighg :-:mzh byq+bel/ 5fifiy,p1t 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 narrx nk j1 4 ig+3.u*zci1yujlk8cow beam 2.00 mm in diameter. What is the average (rms) value of the e1kj3c84 c ku uzi1 jynx+l.ig*lectric 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 bwy zifz* 5u2,narrow beam 2.00 mm in diameter. What is the average (rms) value of the magnef,w* bi2 yuz5ztic 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 across-4- lyc:f *adksb*vje 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 t) frx2lfzjz59ium yjjo e1/-)wfzt)(: t7mpphe 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
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