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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 electromagnetipra2qdq k;2gn,e v)szef91n -sm 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 byik o,uqfy3lo/k5j 4;kvwi98 z 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 produ9r he;jl6*o z ls,wn9zce 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 vacu tst iq up9xdirstd610/ba5 31um 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,lgbk.z. o b9p 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 thyl5v .l5 58dhlnl qb5grough

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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(gzk -hc uf /gt.x8xy0 and magnetic fields in the radiation field are found to decrease with distance a08u kg(c/.x-htz fy xgs

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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 s gpsd053guc.at a given point its gp.s0s5u3 gdc $E$ 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 /qm7 ri /nk,yhydt+k6is radiated by a straight wire antenna that is oriented vertically. Wha +k7iy / yn/qrmd6kt,ht 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 wavec38/lbs ; aw3)p9jbwe 5dayvqs 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 u-wafnrv /h .o j5g2t72/gmxl 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 wf*mtpi2jai+xl c43z 8avelength 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 /+f.wr hu5qjrs klx91transports per unit time per unit area is thex 5fw hj1qrk9/u+rsl.

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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 electromaygc r,e gli-l3cd r.u ri41n2v30ivo+ gnetic 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 electromagne5c cni9c ;ag mrtk0,6etic waves in order from longea6;g0 icetkmc n9r 5c,st 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 73gvyt r pdosg.3.q4wlql m +38az2wvEM wave has a peak value of 2.0 V/m, what is the peak8. p+s2tq73 3gor 4 vq3. gwdvlzlmywa value 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 ife rxe k7wjjpk.;:,ma 4 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 radio wave?kl13x,kccmwyc b(-,szje f 9w9+set5 gdf 7o3

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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 a frei 3k ndm8g kx 03wgl6m2t+,hcgquency of 7.2 MH 2x03 ik6mhg, g3lwdcknmt g8+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 1ug4bbk;/iql (o17j ba yq99dvt3 7edw460?

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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 microdukdp1so285bzk09 y v+qu 3py t3z: p)7a dionwaves?

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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 miqhy dol23*h ;s?

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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 trave)+g hx6jf 0uuxc 56dvtl 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 atya.(bt 9;ljs ma8 u4radio 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 yeavr+ a13xnld+mr (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 returul1i64q v2ttdt3 o4bbn as an echo in 20 ms after transmissio6tt it2ov4bl1 q d3b4un. 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 Eartwz ,tg-( l;hfujl d7 qs3exn*9h (above the atmosphere) at a rate of abou9qgs, lu e37h t zf;(nwjxl-*dt $1350 \; W/m^{2}$. 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 r .ay ;6.tku e(ip:zxaoe,-oze ate of aboytaio z eauz,;(.kx .e6-ope:ut $1350 \; W/m^{2}$. 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 2.5 m from c8.y f4b2lcz2zxv2czkjx y w -mat4;5 a 100-W yz v 2ctkaflb8.j czmx4c x4;y52 2-wzlight 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 field at a .4) )kap 0q swb a9gg-(: l0ajyhrmzfedistance 2.5 m from a 100-W lig9kaw gjzb:q(.4)mrhy0aae-slpg 0)fht 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 aa xyie 3zpsp4j06wd7z65yw.diameter. What is the average (rms) value of the electric fiel swizapz.p3y0654w ye6 dajx7d?

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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 na:w 1earp76xibwk e; a0rrow beam 2.00 mm in diameter. What is the average (rmsx i :awrapb06;we 71ke) 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 krwc3fb(rqqf-gn7. wx;1 /;ndxu kp4across 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,cd5g,5t:am;l v /a7r:s jtkqh 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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