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习题练习:Physics Unit22: Electromagnetic Waves

 作者: physics   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 pvdj3rj d*.gltbet,-* oor9+ 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 b7bsqne0t;) i dy 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 fif;z m6pbq9k g, w;3wbjeld 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 through a cknx;nnw-790 vjz 4w;soq e*tvacuum 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 electi uqh: (/vlnl:f1loj.u .utf2romagnetic 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 throu3ayn za(-u 3;z z/zlvtgh

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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 el3lgzmr,,dl z3p.j,m- za7 vu*2cuthu ectric and magnetic fields in the radiation field are found to decrease with ,lz*z3rp c - h3 2l ugdmazvumj7t,u.,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 sg w0le04ez 1:c) z rx9fpct2ythe east. At one instant at a given pointsxef py wl492) :tg cczzre010 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 raduf:.en;5zbbyeen-lvn39 m t 6 iated by a straight wire antenna that is oriented vertically. What should be the orientatiz-byn;9t l5 m.ub6 vneene3: fon 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 wavessv abvv/:xp)o7 bi3 2oh+k 3wy 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 electromagneti ht;;dx)ss0:1 kocfz:+j1 j*f tmo xguc 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 0dga y qud,-m5from

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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 transports per unit timeki*x r 1tj/t )i0u8rc,bd wnk3 per unit area is thet13bj,nr0 /u8wc )di*xkrt ik

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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 eace/x1;cl xv.ht3;fj4ao-i 2v1 cp b blectromagnetic 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 from lob3vr40xvdjp9cux7er)3 ; c4dshemu5ngest to shorteph x) edcv9rjs37 xd044e;umcb3vru5st 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 o5:e,mbais4ob 3we 5khas a peak value of 2.0 V/m, what is the peak value s3e5ob i:4,boak5 emw 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 their fn(8u2wq6dx ywe:ubq9requency 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 radi qv(t/mt36r07l9d tk lff1bpz o 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 signaphqf795j eyl: ;sr)a4ag y e;il transmitted at a frequency of 7.2 MHz p7:hir9fqy4a )e esjgya;;l5?

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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 Wecn+iyuu y 7f .4mcbsv4* d8di5mo3v7BRN 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 mmoskhu7w8)g +v5 lbu 8vb(vxo9ybvf e+,d 5d:m microwaves?

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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 trave6jcoct e/vzbwj5x1- ip,d:h 4l 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 to travelthmuflz9 ad8o -0vrmf:n5 2isq 4e (g: 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 milqchp a0tmi+ i-b(;jyu1ldmi74. hor/r-/l w qes?

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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 travef7rpp*2/zpf55 q ijl xls 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 returnf)b5czmx rs e3r3/v75 bvh5hn as an echo in 20 ms afhe5 b)c7b5f h3nm svr35v/zxr 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 (above2:mzlnlgtug . 5 oa;5b the atmosphere) at a rate of aboongt l2;a5b. zgmu5:l ut $1350 \; W/m^{2}$. 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 hw6vy1 t++azse+ v-uw (above the atmosphere) at a rate of about s +w6hv++av1u -ewzty$1350 \; W/m^{2}$. 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 tx, mjhwluu ;-+he electric field at a distance 2.5 m from a 100-W lxlu hm, -ujw+;ight 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 gxcm)p*i psv09rcn6l 3 mwp/, magnetic field at a distance 2.5 m from a 100-W ligh gmc sp rvl9/)iw0pm6n3x ,pc*t 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 diam-(a red8y-vubeter. What is the average (rms) value of the electric field8abv- y(edu-r ?

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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 diaau:j7nf9 t *uozvpv-3 meter. What is the average (rms) value o7 fvoz:u 3na*j9ptu-vf 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 transpjl+q .,qq)q eqorted 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 pow3kstf4 iihu /-j: da/*6mq fkper output 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
未答题: 已答题:0 答错题:
当前第 题,此次习题练习共有 35 道题

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