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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 electrou;c. umfi:- qnjcw3luqt n 1, :mxr2n1magnetism 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 produceg7u*3,gvx n8bli* uj4vd uh8m d 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 produce ai,yyh h1hug3 9

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic waves trave)zh1jzlp f g)0 x9tgl*l 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 y9: r o)x/53iap pfuw.oggu:selectromagnetic 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 travvdh *4yh,b z,di6rg/ 4btm) tpel 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 rarj6w b2bj 1kt.t4g fq)diation field are fo) t1bbjg4jw f.t62 krqund to 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. At 3t r2p6wy.1aak u(wxow8u um)one instant at a given point k. opawumar8w6 3)tx(y1uwu 2its $E$ 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 radiatexq*o1g vf+mn1 0fv*vb aemf 94d by a straight wire antenna that is oriented xvmfqv 1* bf0gmo+f*na9v41evertically. What 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 wavesuv/dmr/w2n. 5d j 5mga 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 electrode w * e1 59qenm-yvs0bowd5w0magnetic 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 dz8u.drg0wt3*.nujtl-9i m w wavelength 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 transports per unit time per unit area io5 hxf8kmfd ojk9 8fb-;/uy7ts the fmh okx8 jfbk8;o-u7f/dt59y

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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 anbjjn1 *s hcot*gy:* b; 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 electromagnetic waves in order fro0ewax90 bu: atp t:bj ni9*p-om longest tawnb00:e*abtuo- 9:j xt pip9o 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 EM wave hus iz/a+ m:4l9n3mo8xzb:*w kvgee:ras a peak value of 2.0 V/m, what is the peak v/::le g*z m9 wuxz a+o4mv:e3kbsnr8ialue 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 their5vt-55fvu ovz 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 h qfnc-u) ro./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 transmitted at a frequey9d1 vzb x+40khyg.ho(m/fl y ncy of 7.2 MHz?m ykvlb. 1h / yzxhy4(+0odf9g

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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 thup tp 9b3kg/ s;g.l0aopg2+ qie 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 microwave,g sd pt280jfos?

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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 -hvbn tmj: .x3ms?

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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 traveuznf) db hxq 8+q adlpbj(;2g,3d,);pfnwo 0el 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 e ,0b*g0q tsvk/th/b:zfn8 eistation 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 ligd3 7nashsi *pk.q(fi t)39zscht 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 transmitt )u4dy u9 8vqp:hbmoe,ed pulse return as an echo in 20 ms after transmission. How far awa:po8y)veud 4umh,qb 9y 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 t0k8p dod 0ujw)he Earth (above the atmosphere) at a rate of about 0wo uk8)j d0pd$1350 \; W/m^{2}$. 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)6w/c5s*fwdu hefq6: y at a rate of abou5:h6 scfw6quye/d w*ft $1350 \; W/m^{2}$. 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 vjl 8xcppr/)xdm /+q8sopo;;ralue of the electric field at a distance 2.5 m from a 100-W lig; xp8rx/qls pj8d)rpm o;+co/ ht 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 disto022)p/n6er3 +aoei t uxrgh eance 2.5 m from a 100-W rixroe 32hat60)+pgn e/uo 2e 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 out a narrow beam 2.00 mm i/ 4xa s) .bervl0p5hvln diameter. What is the average (rms) value oe 0ahxvr/. )s5lv bp4lf 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 diametegq 0-hdd(uh*t.9z dlwk b 0q.cr. What is the average (rms) value of thelhd*d 9 q.b0d- q.0hzk(guctw 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 tjvdg a j.kqm)enf3 j l: 1oo*.d29aa+jransported 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 outputmfv: h;.w m.mt 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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