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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 wertom3b fo0 ,xape8*t v/e 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 isay1:ujc)x,0( e:onj vm 9hpdt 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 : neu :mui*pp1 y*b4njproduce 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 vat p*)jwsorm 88cuum 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 ex0 * 1dao urp,ef4eoym6s))rnlectromagnetic 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 pf7x9l65x wj+d -c zuwtravel 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 radiationhbj zn +v*tjm q5e0/-o p- ix9mr)fqe; field are found to decrease with distai9 -rfnq5t/)0 jexzj ;+vpm b-emhqo*nce 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 ins0 uyo s*c0lx(4v 1yfam fh6)pdtant at a given point x*fys6)41l hm0o d(y cavf0up its $E$ 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 straigz xn+2ojy 5s -sp+9l9pv.pfji- 5a.lny+ dbf bht wire antenna that is oriented vertically. What should be the orientation of a stra.sjfbd 5.+fnay9xlyop-2si 5- pbp ++znv l9jight 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 arm nvkz 19m9 rhyd ,2tabhk: 85m:ck8nbe

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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 :2s s rkk9dj8xa/si(u 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 ; -im*cb9 k9lp6ob shjwavelength 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 electry6 xaxs 8gy4crd. ,,iwhv) 7diomagnetic wave transports per unit time per unit area is the4wrdy,sxa7hic yix, 8 g6.vd )

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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 electromagn gzg/ phqqh4ltyg3b 60)/y5 ssetic 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 limn- svc 3+raj ,52q2cvw)flkists electromagnetic waves in order from longest to shortest wavelengthl)sr-w 2vqcfi+,k25n 3m ac vj?

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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 Eg;hfko l;iq+ 0M wave has a peak value of 2.0 V/m, what is the peak v; q+ofl;0kghialue 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 if their frequency is-5eoqla7 lydcz5f 1z: $5.0 \times 10^{14} \; Hz$?

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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-MH97t6 osqqb-me4ctvi8: ndh2qz 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 a1. b *81bpou*jhsj/fjjxmd zn *sb*b4 frequency of 7.2 Mzjdj8 j nbhomu1 bp1. 4xs*bfj*s /**bHz?

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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 qubvai ( y6m1gk:ft e .0pw1;athe carrier 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 of 20 mm microwaves?g-7w wos,ad ;8odfh f0oz:oh9

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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.islf9sjzr e1;r )b6, h0 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 lighj1 p9b4o zxlulou a,l a,w6z7.t 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 28nd-t:ifzv;q-wrajasc9m9 1 t ;/u mb0 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 (tvtk86+xkbpe f3f d4f(he 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 indicnry:* js9id 0 c1eszi5ates that a transmitted pulse return as an echo in 20 ms after r 9iden 0z*ic j1y5:sstransmission. 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 Eart i9rch0w9dw-vh (above the atmosphere) at a rate of abouvd 99wiwr hc0-t $1350 \; W/m^{2}$. 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 atm6np2w8bii bn, gnr j-1osphere) at a rate of abo812ibw 6pnn-ibj,rn g ut $1350 \; W/m^{2}$. 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 bm )bj)2((m gitl2t pzelectric field at a distance 2.5 m from a 100-W lig)l g2( (mjpbb)im2ttzht 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 magnetic field atrn fitf.4:9u j a distance 2.5 m from a 100-W light bulb? 9n.f if:u4trj

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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 dia5 a2q;u/ zurkxmeter. What is the average (rms) value of the el urua2/qz 5xk;ectric 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 in diameter. Whi1bzl i;s/;y vat is the average (rms) value of the magnetic fi;/1bi;iyz sv leld?

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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,zdq mumjs.0; h s8k6e4ji9 wh 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 4lmo 3fm-.ybq output 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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