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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 electromagnetiysb*jm 67)qd8dr;x b rsm 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 propldw2bh 8yyg z5ad 2-2duced 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 fx61chvusm fbff)u ftx (0+bdz(d(+9hield 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 tra.4mowcvp;g rb)372l v)b stg pvel 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 el0v*ol *dyf 7bdectromagnetic 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 throug n3n+.utg)h4nvd5 qf bh

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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 then njp*z npf)uurfj1.nkov7h +-g( 8 4m electric and magnetic fields in the radiation field are found to decrease with d* 4-1h + jn k)8znup(nrj.u7fgp onfmvistance 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 givexb, 9/ tke1w oey,hn)u,br1lkn point itk,w9lr ,kb e,uyh /x tnb)oe11s $E$ 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 wave6pzkiz;q(0hfkg np4 + is radiated by a straight wire antenna that is oriented vertically. What should bep p k+n6gqz(4zik f;0h 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 arejqmsfg10( ng ylyow a53i8vzz.e;i6cc 1ey,7

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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 naturbht;ju j8(x5p e?

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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 wavelengts8ilyd /iodvg,s /2z(z3v nub7q6k 6vh 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 electromagnetix qv7hy3qoy-)x s2yj7c wave transports per unit time per unit area is the7s7o3qy jxq v)yy2- xh

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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 p 08(90obbihjri tg y0electromagnetic 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 -6e+2m,k f,ik my uxr*nfwg,c from longest to shy*6rkmf +,m2x c,f -ik,g newuortest 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 wave has a peak val5x; c29sk:sclxh2oid ue of 2.0 V/m, what is the peak vasc; sxhx5l:9k dc 2oi2lue 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 theirjo6kb4 h r,0h-w r)hij 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 iw-o qy -4.rv 7z0fc 63jiayvn92.9-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 ovzew*uj7 y 1ny3*uu) xf a radio wave signal transmitted at a frequency of 7.2 MHzu euu) 713y* nzy*jwxv?

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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 statix1ih0z4bk *f+ qh ,rtzon 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 micrf0s0 3v,6asxvaa x v;kowaves?

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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.r nd9,l9hh4e82i bqde0 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 liw 2. 5gok9eqpaght 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 jdl38 tu 55bkt:sw- en8 thebt:;qo;s 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 (tl-dsm ft7v/dh0pqsa /7;uv83cm:pu.gm;biphe 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 returc3 29qiwmgt6j anlusym3+9g ct(; 5emn as an echo in 20 ms after tm3gtwa36m9lu9c mgc2nj 5 i+ye; t s(qransmission. 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)b645nbizss g sh.( :chx 8zr)c at a rate of abouz8bcsr4 x. s:h65sbci)h gn(z 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 tha- ea.* kn5* husx8unte atmosphere) at a rate of about-e.auu knanht5 x8* s* $1350 \; W/m^{2}$. 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 wi:t 1 od a(m o8cfu)a4/;v(afj kijt8of the electric field at a distance 2.5 m from a 100-W o 8id f1iwktt)vm:ua/ofa j((8; jca4light 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 fiv 5)l phdc69dvccqu:0eld at a distance 2.5 m from a 100-Wlp)qdc 6dv9c5cuvh 0: light 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. What is thp: jd8 u4ugo,0z ayj4ge average (rms) value of the electric fieu 4:,dzgo 0g8jauj4pyld?

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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 .zre,lr6n n5 vcxo )n*the average (rms) valuezr.c *ox,nnn) re65vl 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 tran8zq sy uxr2hn:w 9g:5zsported across 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 m12gtkw( a*fq 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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