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习题练习:Physics Unit22: Electromagnetic Waves

 作者: admin   总分: 35分  得分: _____________

答题人: 游客未登录  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 all0derh7 wf syr-6*2ae j electromagnetism 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 u*fw -,;g /gks8(6apx5utn yki-dissproduced 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 fz4t xseo0 ;+ -n*lutgproduce 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 trav ux:(0(0t , t c,gguh6i8 cx.eaxgvuuhel 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 electromeyp :m0 tkn7,dagnetic 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 trave2m6h( wr7/qdy:b4bu0e y dqnal 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 radiatiown2.g(..cpz - jffdy gn field are found to decr2c(.p.w fjf ggn-z.ydease 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 rjc ku;4/zy d mow49r8:x;itg given point it8rd4z9t jw4gk roi u; c/:mxy;s $E$ 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 straight wire antenna that is orientec rn. nnuq+( 5hb9.6eke7 b7v) ayillvd vertically. What should be the orientationkl)vebn .qcl7h7.e(ni9 yn u vb5+a6r 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 al07fcs24a.vhdo -g.e :nt ukg re

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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 nature?r kkjlsoa,q ,z h.6zo;f)51 ec

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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 waveleng, e9amlo4uo c)th 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 wavmfdbg , 2jwkp+: pqf);e transports per unit time per unit area is thegd)qm j;fwkf, 2+bp:p

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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 arl;osowy34bb1 ea exerted 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 electroma boig/() j 9eh1mwjy6zgnetic waves in order from longest to shortest wyi/m(j)wb9zjgo 6he 1 avelength?

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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 du,f.0fqosc-bn 8 q 0ain an EM wave has a peak value of 2.0 V/m, what is the peak value of the af0,8db0u- q qscon f.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 theia9leu/oo/(j1b87lphf i+fmc x ,s/rwr 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 radio wave vtu)sg*; k+ld?

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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 transmitte rp.4w g*x xre19rig+gt9c y7htb94mvd at a frequency of 7.2 MHg7 1 4cvw9eigr .ptym gxbrxh49tr9 *+z?

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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 station WBRN 1460? ckzcxowt;568swekkt .:yi -7

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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 microwgdq s rg4g+,ivmx;8, waves?

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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/ .- wm wt,ax9num /n+swuo5ph 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 travel 1. nzmp4 :ykl /d,:sub8g0 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 takemi,3sfr2),ae lo qf1r-; e mkq the signal 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 year (the distance light travels iip bn8dj g96n4n 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 indicatesi,pn-k k2kx e7 that a transmitted pulse return as an echo in 20 ms after transmission. How far a ek -7xk,2pkinway 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 ratebzre c/tf gp1/m7r4;r of abo/47g ;br1 metpr cz/frut $1350 \; W/m^{2}$. 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 atmosphz97fklem6 tn2d)mb v -ere) at a rate of abou9-n kzd6)evmtbl7fm2t $1350 \; W/m^{2}$. 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 distance 2.5whel , *pl )ns+q*flm69yde5m m from a 100-W light bul *5qey d)fpl+ w,l mhmns*9e6lb?

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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 v3fqd/qhc i c, er5a86magnetic field at a distance 2.5 m from a 100-W light bulbe/idq5 f,qc63 rvc8ah?

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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 meh4e2s mgav04h2nvfd5 o4j4t m in diameter. What is the average (rms) value of the electric fiem v ge4ojtsd52 h0e h4a44nvf2ld?

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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 si1dg dcg w:n9 t5j)xibvuj*s l7t*/6is the average (rms) value of the magd7n ti 1s/dv:b t)wxu5sgj *6gc9jl*inetic 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 acrostpvh,y k,c6/ztq .mnjw: g4)ts 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 that5 qc nr7xsp+e6 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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总分:35分 及格:21分 时间:不限时
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