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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 foh7-vw m7z tpu+9quoc (r all electromagnetism 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 (.k rifmy(1m gproduced 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 wiy;xp p2:ldf vse z*ljma8 x(-8-(dlccll 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 vacuum ate:f-4g c3wyu l

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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 o +vtl,h,mh e/vf 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 tra1q5j*eunqk3 f f4ile0 vel 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 2f7zjijd1y nl5ku( t .the radiation field are found to delztni27yjj (d5 .uk 1fcrease 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. Ad mze0ccm30b.d (d ++0 qkkth- nr)reot one instant at a given point its mt m +dhke) z(- dd0o.rb3+rq0ekcnc0$E$ 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 straigh/5 (m(wgrbqxg 8l9pdyt wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It should be plap /xr(wgd (myl gq95b8ced

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves 6+wm v xxt,gc3are

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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 iv.u0i3ev0gis. nof g 3n 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 waeleveh;et b-.d+4q6yb2n9fi 0me,avvelength 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 pfviuu*n/o)g 2+q z5ne er unit area is theevf )oz 5*uu+in2gn/ q

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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 wave is called thb zcm1**6gn1m 8qr, 0qtufnt nu;6aln e

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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 ord54v-uh za gum1er from longes m- ghva1u4u5zt 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 EM wave has aarl .eq4( (.smsfun63alo g d- peak value of 2.0 V/m, what is the peak value of the magnetic lmd s fonau 6-(s.r(ale43q. gfield?

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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 wavxh 0yfqk c31 *jrgw1,ses 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-MHz radio wa,ucw80uiad2z g5b 7i d+u4qv3agn*dtve?

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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 signg,/ odqxq p 8mid*(rj6al transmitted at a frequency of 7.2 MH8*m(p/g6 qxrqjo,iddz?

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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 1460?v7- /rurl-osb

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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 mcym fv7 d0u fyz3c)f1+icrowaves?

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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 1t49l edh.-iq yjyoc32 .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 travel 1t/+iv,,x- y*a mgehzg.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 ,6hq s ch 9-up vwmw6()rdjw36zlmxn: signal from a local radio 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 yea04 uptnrk)e .t m4b4pdr (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 retgme)0 erfmtc wdz,sy 4c20 +)curn as an echo in 20 ms after transmissts,c 0) r 0e+ed)gcyf2mwmcz 4ion. 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 zr8l;dj4 ok2yao,tthcxm 6 21(;u5vs ,m dfufEarth (above the atmosphere) at a rate of aboutu cmfv huratz6fy1 dkx 82dos5 j,(l2t;, 4mo; $1350 \; W/m^{2}$. 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 ( m2ta):7a-pxnl ti ,g*hx/u dyabove the atmosphere) at a rate of abouux :)gh/an*p a,xmdtl 2-i yt7t $1350 \; W/m^{2}$. 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 valuz f;eav;be .:qe of the electric field at a distance 2.5 m from a 100-W light bul;a:zqef b. ev;b?

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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 distance 2.5phgc;,y ;ms y9cjvrn :q3qo s,d,,v*q m from a 100-W vycp*vh;q3nqy d, qs;c9g:r ,o ,,js mlight 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 nariv+/3)t sj ktqne.0w wrow beam 2.00 mm in diameter. What is the average (rms) vatsi+k. t/3v)q ww0jenlue 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 tdt c lap)3rg0dd+nve1r *s/ )a narrow beam 2.00 mm in diameter. What is the average (rms) value of the mal1anct*r dpv+stg) 3erd/d 0 )gnetic 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 acr9; rge0s( y0nql0yvi fh) k-buoss 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 zr/ hntz0,8k;bvz o3y 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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