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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 devp6.3fpbt o8g 6ygq *ev np r)h+x:*dyeeloped 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 5ds9jdwev2(1ouc sq6l 6jqzrv)pe ;jhl5 /m + produced 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 )jxr7v x2:wrpfield 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 travel throur75w aa8dcoabw(yjre9z-ay. n, .o8l gh 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 electromagne)rs:)req) uqep (zr(r4l4 cw ttic 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 through sa:m3*ruw0*e /w pxv/osnl-6 pmdj5i

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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 magneti c8qz +l3w5l x7t+*rebo2 dw7c4qpef xc fields in the radiation field are found we8q+xc7dol z r 4qfc+ 357ltpbw2* exto decrease 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. m;ik; b 6cm 5wl)6ojqm At one instant at a given poin ow)i qm5mlcjbk;6m;6t its $E$ 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 radl5 h1w :tu,ic:oem2jzt9tp( niated by a straight wire antenna that is oriented vertically. What should be the orientation of a sz :pn 9j52tl:hto 1t,wmceu(itraight 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 are.a5*+hibj7lt (i7 lvbk jjzz 9

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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 electromx-e -*qiu:entszuo .;+a zj-l agnetic 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 wavelength fro bwar7e8 iv92*zow(vdvm5j8 em

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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 transpo l z5*2w7qk3pjogg. tmrts per unit time per unit area is thekogjp5 .l* 7qm 3tgz2w

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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 ex rmof54-ao;:p68zmhg-ai b o gerted 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 llqu* t c0- x,kmxj(c+vists electromagnetic waves in order from longest to sc jt,k lqv+mc(x-0u *xhortest 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 waci7m5b)wq;vw hw 9ff;s m/ tb0ve has a peak value of 2.0 V/m, what is the peak value of twi9 w)7 s0hw;qvcf /tm;5bfmbhe 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 their frequqgah6, 3fy3 jnency 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 -)ffm q:jc/r 65gairv 92.9-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 of a radio wave signal transmitjavdgqwl0- ,o.d ajn,,c *,kz ted at a frequency of 7.2 ,jcd,z d n*qv-koaa ,lw.gj 0,MHz?

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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 j (,kyh0 wxr, li)j6 ow tj0muig5/bd:wave in 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 microwa sscfg-g;bl lwrt8+ 8)ves?

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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 ms 7n2,sjx + icsxxloj5g:i;c8 e?

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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 lig7exzyd+nv0y/ ht 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 20 mil, j3zlt, omkf a:mj0o+*zu oe/26uj fces?

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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 yeq5+ nt2wr-0r duq3u sear (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 trwo jqcj6(7tbq3mw5 0 ai.qa2zf)8au mansmitted pulse return as an echo in 20 ms af30mf b (m jw658jazcu2aqq .ti wqa7o)ter transmission. 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 atmosph(a zb4rl 2r3vvz.twk:ere) at a rate of aboutltvr zzab.23w r:( v4k $1350 \; W/m^{2}$. 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 abp 3de jfti.jn9(di- 3dout -d j p.9(3td3dfeniji$1350 \; W/m^{2}$. 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 a 100- s;vm ,7,+; os3ou8ggcrhtolm W light bulb?sovcl;ho3;, mr7omt+8g, g su

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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*-ellsn 4 (6fk0aekir distance 2.5 m from a 100-W light bun (*0e a6r4es-kklf illb?

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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 diamet 2el6k36p hq2cdrmlm. er. What is the average (rms) value of the e2mmkl 6 p6rle3h q2d.clectric 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. What is the averagebe bg-d55jl:j -pl 1,kqgu i0t (rms) value of the mag-ggi5l b5 k:0j1-t du,lqepbjnetic 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 tra-qb c 6pgg 9rr)owgf0:nsported 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 j5w ;d lwc74xqoutput of the 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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总分:35分 及格:21分 时间:不限时
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