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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 electrom/b)g dkpa zs7s+0eo 5 f41tdanagnetism 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 po) 7a gxq )gl ua3c;u/do:1fferoduced 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 fi09fx9tj 1o4,oh zhpx3 ans8gkeld 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 wavesx(s7wyqd5gc2w ;x o;cftt h 5, 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 wyfgk*ibm )q7c s-8/iw*qgbp(aves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves can travj0r7zsm ::fvf el 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 ele:he l/i*/ prosaj/3r,te;eed ctric and magnetic fields in the radiation field are found to s3 *:he ar/ reie,eo ;tld/j/pdecrease 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 gvnsz,3*eh m z+iven point iz*ms hen, 3+vzts $E$ 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 :11vmtdz0h j:s-o kwr is radiated by a straight wire antenna that is oriented verticallyj z0td:r:v1m-os kh1w. What should be 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 are/a)maiknz23-v7e ;v ffj8u ke

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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 electromagnf4 2t 3xxzuq2netic 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 wabd)sn* gx rqt;w 9eq;7.f 4ztavelength 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 h b:cgk 0ed 689wl0yoetransports per unit time per unit area is thegw06h o 90:lbky8 edec

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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 electromagnetic wave is called the;r x/ko+ihln z x(jihd+4s::29 k wjjs

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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 freq 3v )mopgr aebm0 te8)-yu(*om longest to shortest waveleng)8 qv*(mt-e u)mry b3goae e0pth?

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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 tnb y:-ko bhbj8r/+ dlf3 b4al2he peak value ofbo 4ndyla3-b8fl br/+jh :kb2 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 *;gb7g xobfvz3 )pfr(y3pl.s( atk9uis $5.0 \times 10^{14} \; Hz$?

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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 ) 27l/rkloc +eo 7s +hhixjxn3of a 92.9-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 aib7*x5-7rxeur7zc ma 7 / bvql frequency of 7.2 M75z r 7av*b mcx77uxiqr bel-/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 thfn. hu0cjj3* :cqee f/ed)tr0e 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 2,0ix cztketmoc6gb 4j. 84t4j0 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 1.0 ms3zk 8q*khonm) (ln) hl?

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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 travel 1.0 m? ;l2pz:j- .7e1klngyzv0 tmru

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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 mileskw1f: zcvl ij-r5k.m0lz +-pmc9 o+xs ?

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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 d-s j: k1ei**hd 9jxemuistance 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 an qhyj 1)9ww gli.i 84ojecho in 20 ms after transmission9 jw o.wgl ihyq)41ji8. 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 atmosphere) at a rate 1c y f pzca;10rppl8-xof about80c;fz ap1 1p xyc-rpl $1350 \; W/m^{2}$. 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 x(eduxp.ta0k95;t mo atmosphere) at a rate of abotx;eut(p .0o5 9 madkxut $1350 \; W/m^{2}$. 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 thioi j)wc0e8nk+ d d),te electric field at a distance 2.5 m from a 100-W light buln),i 8 0oict kjedd)w+b?

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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 from a j-)2ufnt o1duoy;ht2 100-W light 2ty) hn2-of1uu tdj;obulb?

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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. What is the aveod5uh+cct( 0a0 ,tcugrage (rms05ho+ ca,(d0cctuugt ) 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 narr8aw5nw8,k ;nzueluy 6ow beam 2.00 mm in diameter. What is the average (rms) value of ekl8w nn56 8wu y;a,uzthe 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 acrossa.og1y xc a2 b1tbc-v:pludy47d(h: j 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 the Sun, givefpe;z:9ac+;mc n*-hj qp id5mn 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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