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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 electromagnf5(9t fyw hvik- ,:epfetism 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 byx kr(gjic 1),i 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 produco 7b-ew+u l9kzc;rorgavi ,nvi. w329e 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 throughzi;lgr;e0s g+rb/lc( t8; wws 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 velocity8 k0w:rrb h/0cfl9rygezh:d tqrkyv n6 4954z of 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 wavesm,*ulp7 . vudy1yn ;ok can travel 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 magne780+n oj1 jigfkadg a5.oz .g96vqnzs tic fields in the radiation field are found to decrease with distance ak+gg7jvo8 nqz 6 .a.fzo90d1 5gijasn s

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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 g igf z0irhz9x)5. *41osc kidto the east. At one instant at a given point i.i4 izfg*ihr g 5k)10 sod9zxcts $E$ 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 wav9* )ubyc2 /qzzrxey+ue is radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receuq*e u yy+rcz zb9/2x)iving 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 wave p,4x/+mc9jlg . unvqzs 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, whic3i.uiw)dn; xw h is not 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 wavelengthqwxb3n0u) 5+vjc o0w spy bk89 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 tlir .- a1*cl paig7fdh6b5g: vransports per unit time per unit area is the:d-7 1pa ralgfic5h blg*6v i.

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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 exerteu3o:jfj ljn9qib.xg : ,g 59gxd 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 followin 8hpdnm8zqv:sh-,nj5 g correctly lists electromagnetic waves in order from longest to shortest waveleh8-m, q:8ndns v5hj pzngth?

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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 ie9 ;x f)/3a v3q8ugtnkt ii5dvalue of 2.0 V/m, what is the peak value of thev tfeg 5;3a i /k8iqnt3)x9diu 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 lps;5a ,2 wouejd(och* ight 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-MHz radi+h5bq my1u9 ivo 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 waveleng rmd)i:n/jcv d4 kxlrze-1qa*aha+ky4b ,a;5th of a radio wave signal transmitted at a frequency of 7.2 Maade bra,j /r4mhnqdk-:; *) 4+zil yaxck v51Hz?

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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 xyvn-to2i*5 g h8r a8gin 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? zii(spfq, 4 m+hgo8)l

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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 travelwi1d- i2 ifapbe,mf20 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 trampzt/l9k bt6 6 gv1kw4g3uuzq b6h-p41dp zv -vel 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 signahlw(ysamk80y v3+m 0tl from a local radio station 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 yearh5z yjip- af)p-h 2cn/ (the 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 rtcl zv3o *z s7+byf9(as an echo in 20 ms after transmission. How far away is thel z*sct+r fz( 7vby9o3 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 Earth0;077m tjuqh;41 kmafigar on (above the atmosphere) at a rate of abot;0; ua7rkfjmo0 1 4 mhgnqa7iut $1350 \; W/m^{2}$. 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) at a rate of aboj.hhu72i + rmmut.uhr2immh +j 7 $1350 \; W/m^{2}$. 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 field at a d2 u0 :rdb2 kwx/(wtgcsistance 2.5 m from a 100-W light bulb?/ krtbd(scug0 w2xw:2

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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 m0j jjctyg /lt-g:9k ce e+,m(d from a 100-W light jtm(j dg:kgl+0/,e 9 yc-tcjebulb?

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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. Whu+gv aq:w()gaat is the average (rms) value of the w):u ga+qva(gelectric 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 ousb5kp w /ku0)u ijp *d6f1uad7t a narrow beam 2.00 mm in diameter. What is the average (rms) value of the magnetic field?ubf7pd5s) 1uk k6ipjwad*0u /

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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 a;;bl ba(xjl: vcross 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, given that abth h)n89vwka8b3ul sf0 (pv+ jout $1350 \; W/m^{2}$ 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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