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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 were developed by,pis,a4 t08fgf6;znya ah g d*

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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 produezggi7g9 d 4)uced 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 ek+m qp6z r;9u- zi5vb+y hs/,b d*hryfield 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 through a vg ug;ih7fb-3btaxk6gj 8 : vf5acuum 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 ofu7d sgxn24wf6 :z,jvu 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 tra k85sh6sa jte1vel 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.4-kxnnmbeobo a, btj*2.n. /j i,vba electric and magnetic fields in the radiation field are found to decreasx kb bnm t4/jevno-*,nijb..a bo 2.,ae 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 pog5f+qgdb fa. k imn 0;9fcg0n-int its gf. g5if+gad kn0-fcqm n;0b9 $E$ 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 a205 gdpbur dva .36jye straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? Itj6 p2 darub5y3e0v .dg 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 wave.p4hyyd y4 r1 mn3.2 jejvpzow 3d9.tas are

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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 in nalv.59adk lcj(ture?

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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 wavz-qc8d0da :f0h/pb shelength 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 transporti3r( tefj 9qt7.ot1fss per unit time per unit area is thetieftqs( 3jf1. 9 to7r

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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 exertet4prck-odpex v 4iefj (3c67: d 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 electr6 i7lm;i.mbpj omagnetic waves in order from longem.i ib m;j67plst to shortest 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 wav1(l )6ie/u1*grmkumggsl j3 v e has a peak value of 2.0 V/m, what is the peak value ugu1ljm6m grsi) *e/1(vg3 klof 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 rh3jkmblc9 90(ps gt-)*nmc o 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 92llscz;(b)rqi:gh82d 5jj-ou zr3y a /.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 waveg(:e7g bq imb5ao z:,j u.bbc7qm6h6k signal transmitted at a frequency of 7.2 M qubzo6(7kbmq:6b57: eh g.gi b ac,jmHz?

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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 wayb;jc+fk+:wfbaahz w g.7d23u) o2v z ve 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 mchhb* ynv+cf7 50er9sicrowaves?

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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 tr avda svk1;l6n6;a 0giavel 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 n5a03 -xna b7t uxesat (3-yyhlight 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 (*ihjxki2obt1:p0aw, +ti ls 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 (thfdd2 3kblh 9gm 7,feq8e 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 indicates that a transmitted pulse return as )cvjrp +n.4jki w9x3ie9mu ldq6))csan echo in 20 ms after transmission. H 9+j 4.cmnw cs ikdr6)) 3quvxl9jip)eow 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 reacmrclwrpz,k,kr 2)8r;5 stet, hes the Earth (above the atmosphere) at a rate of aboutrlr wz,c 5ttkerr;p2, sk,)8m $1350 \; W/m^{2}$. 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)d x., 1z h/xer2qyxoh9 at a rate of abouxohqz1hxy2d. /9 exr,t $1350 \; W/m^{2}$. 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 fic8)c *aejj)f.exdv4lc a m4b6eld at a distance 2.5 m from a 100-W light a) l d4 )jec .f68vxjba4m*cecbulb?

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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;t t4 xr+l5imz.5 m from a 100-W li 5zmr ;+4xilttght 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. W 4t:y7yjbgrn1x b kjiy.)/ -buhat is the average (rms) value/gtb.7j1 4y x r: bnbk)iyyu-j 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 beam 2.00 mm in diameter. What is the averarr :2bm0lk9rr65jl hmpkjc3h8 nbaqh 2)n ;) age (rn:pblmakr 23kq ;)ajlm95jh)n r rr b826hc0hms) value 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 across nug3ww yn+s v7o 90nx5a $1.00 \; cm^{2}$ 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 ofbij07:7i pwprjp 1xpfs,3: qf 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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