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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 all electromagnetism were developed fl1ew .:b: wzoqf+7m eu5nsl/ 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 byvly:)6 qhao a9 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 pro2fbag s6ujfc th 4;/v:duce 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 va ig l4i(c8e-n4+wde ozcuum 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 nic l6-rb /fu7zgty2+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 waves can trave 3g9oo:5y6 2swd zbnmkl 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 magnetie8/7 l/hog rr)vr -rqkc fields in the radiation field are found to decrea/rlov-h7 ek8) gqrr/r se 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 wavek gk074rcnz0 :sz,3ssf ojd4x is traveling to the east. At one instant at a given point itx73 d,zk4skfscj00:g4zsnros $E$ 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 oriyzzf:* v)6 r65dwry07+ xc,jh epfcqbented vertically. What shhy) ,y rb+x:*c zc5f7v6 pwefqj06rdzould 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 arn stpoy65;2xy e

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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 :*+ knbz(pmy qau:q5ain 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 wavelengtdm1;t*ipc8s mdco; yfxg f: 5.h 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 waf/p4m27t) ism mggb+ qve transports per unit time per unit area is the/ f smq7p+g4mbmit2g)

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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 wsn2x q +ylgbm 3b2d7y7ave 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 wavej sm,fl9 6jxvmzvmwq v)bh7g8(j, l14s in order from longest to shortest wavelengtm4jm,lv7 zg89qj 1()fv jswh6b,mvl xh?

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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 inumj i u 8/lewmdy4 w-+i45ag/l an EM wave has a peak value of 2.0 V/m, what is the peak v8wi/eyu m mwl/id-4 ju4lg +5aalue 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 lx9sevdk8ie ( e.gr 9c)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-Mir7nb6h zz2pl.xmp-j lr75 9wHz 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 rm mj+sdi w:rm8y/6 b6radio wave signal transmitted at a frequency of 7.2 MHz?rb:+6m/jmd i6 y8wrms

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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 h3xq0drsg7tad4he dsg e*o1d 7(/8 mwWBRN 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 micro vxp04qv0gof :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 tramqgoad.np ;7psg0-*avel 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 toac9-:e fzmi m( 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 statiwmt c7bxr jl/r c47*+eon 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 in a )0x4duid:wtcr0n :xg 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 retursoh+a5mhp9pp j;)((fm . yrkbn as an echo in 20 ms after transmission. How far away is the r(.pfm)5kp ;h s9ba(pojm hy+r eflecting 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 rn9-use (k28fs zyvq cyk70w:weaches the Earth (above the atmosphere) at a rate of abouvys(k829:nkqszy 0e7u-cf ww 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 the atmosphec2z pfj6ktr9 c8m 34pare) at a rate of about 8fp cja2zr49 6k cmpt3$1350 \; W/m^{2}$. 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 elecfay vx rant:*,gg8s5,tric field at a distance 2.5 m from a 100-W lgrv,5t*:fa8g y a,xsnight 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 tk:5-ac nc,b mop4cc 9 3osz/smhe magnetic field at a distance 2.5 m from a 100-W oomcz nk4acp 9c3/scmb:5s-, 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 ouviss*l.xr , o+t a narrow beam 2.00 mm in diameter. What is the average (rms) va, .*si lrv+xoslue 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 narrow beam 2.00 mm in diameter. Wv0ejem80l e nw.y *e-that is the average (rms) value of thy*em8net.wevj-l 0 0ee 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 acrog czrhux;5, i/ss 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, giv*5ths;at-c juc dg.;ten 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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总分:35分 及格:21分 时间:不限时
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