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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 for tvz l4)9. qrhh,e7fk-go2t:z l 7vhng 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 produceda)i; ;cduhn,v 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 produc;0 )8: dcopkbp xk.paqq0d urb:li+2xe 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 a7w;j,r.emg/7ag bgzbt

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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 velocit mo-ycjduq pld87(1 2by of 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 travel throughzgoz+m u)/3 sxft* 86 9bpennk

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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 thl r0 4 zz3(zvz:)ccfwfe electric and magnetic fields in the radiation field are found to zc:lf3 c w4fzvz)r0z(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 9fn893v)aaahz- i rgzto the east. At one instant at a given point its 3g9fz- a z9ranha)8 iv$E$ 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 st pjx1cik dq0/hy(y.gu:i) r)iraight wire antenna that is oriented vertically. Wha/ u) iih 0kxp:cgyd1ri.jy()qt 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 waves p7vdw n;c:9qf 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 v0g*r8b8f0nm 1dzg gw m1mcb:k9;klc electromagnetic 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 from kdl,y aa7(jh8

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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 uniw( yrre obpl;*3 no0d)t time per unit area is the) 3bop0y;r ed*rwn( ol

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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 ec8p1 cha,d.6mjg l ak0lectromagnetic 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 orderw,pgcer 4uk +,+ k*wbd,dvm-r from longest to shortest wavr4dgp+c w,vmk-+,wr, ekud* belength?

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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 a peak value of 2.0 V/m, u7f :;t7vxdt )u q8gcywhat is the peak value of the magnetic fic7d7xv ft uy)t:qgu;8 eld?

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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 lig ws,xr:ahnv6( k 6o*myht 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-MHz radio waveb 8 dawl.zs66x)mcl /k?

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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 uj xd / zt;w;tm05*:yi5he 2/nk sbqbbat a frequency of 7.2 MHz52ywtx j/0:mb;s/bnezb; t*h kqui5d?

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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 stas c94+ ol2vwjetion 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 e8.vy**is wi smicrowaves?

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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 txj hnyml6od5,2tqglp51;3 2gae d l7sravel 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 takoc 7c 8g9:-u rvb/rvkt d9lvl)e light 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 takea,zhfv:)twov . ap(u- the 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 year (the distance light travels in a yeaaibdm95, f6 7qetnjjs 6b6j+jr)?

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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 return as an echo i4cz9npk3ig+ k n 20 ms aftekg3 4zp9 +ikncr 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 atmo -t-kof5.t /3pi.efoxqfa uf- sphere) at a rate of abou-3 /of5tx . e ptiuakq-fffo-.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 (abosy- ta/gvjzl t01 b6/kve the atmosphere) at a rate of abou 1 kvt/6s/ay-z0glbjtt $1350 \; W/m^{2}$. 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.a;y4c 4q (vfjict il -dk,6uk 2.5 m from a 100-W - 4cv,y c;6kaf4dijkl( ti.uqlight 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 distance 2.5 m from a 100-9/ yfwhu:1twvi/ dim,W li/,iw9/ v:u ymhfi1 dwtght 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 diameter. What yfpmmsohe::9* e4oc 8 is the average (rms) value of the electric e9hy:s 8f*moeomcp:4 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 q9 71) lopbi +jmvh9ucbw9ai0the average (rms) valuehvjoip li)w 1+79a0m9 b uqcb9 of 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 transported acr8d.pi n-7 -v0czeenpcx1 +ni qoss 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 orc b1pul--b*j/giz1+ ha3m sdutput 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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