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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 all electromagnetis7zinthhh32c .dcrq6 g/r j 7/tm 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 producedfnr77a 33c9r8b waqz99mtqp p 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 prolw;z4s 1bla*z v3vhb:duce 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 throjls9, *31qkrdl)c tm, m7dt diugh 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 electf/ xgeyh3t1 (xromagnetic 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 travelb;b 5ogb;.d/hjszr(d2 i1c l b 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 radiation field ar h ns:tqez q+9,,eu0sje found to decrease with distance ue0:qqt zj, h9s,+es nas

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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 gye4)uc )cp+i traveling to the east. At one instant at a given poiugc p)i+yc4) ent 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 radisegx( dnoye*6 y7 72ieated by a straight wire antenna that is oriented vertically. What should be the orientation of 6gy(n7x ysieeo27 d*e 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 arab5 gl1t+4et0b,jph je

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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 elech6c zm5d;m27zl59qnk 1sub gbtromagnetic 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 rangesfvr k- o4jhqlqp+s)9, in 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 areaq ;hnamaf1tdr70n )+y is they1fd+nt;na )0 hqm ra7

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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 elect f+i1)mqyxx:sromagnetic 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 wavm-w0+s 2yt:yc:xnawj2qi ca+es in order from longestw2+tccn 0- wxy2: q:jmay+ais 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 a peak value of 2y (p ngrp5ly u*gf3o1z9w):vi.0 V/m, what is the peak valu* 5zw:yppfgu r g9n3ivy)o l1(e 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 ofw; x6x csp-iy23 aw2eq 3c v90lrrgzd4 light 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.uptm9d lej/7 eia1w:)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 transmitted at a wlp6gr2m +nsyl 0) xcak1s96c frequency of 7.2 MHz?llc+6n1mk0ag 26ws yp sr9c)x

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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 thrnx v h))*hv1ue carrier 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 qf i -9xm5f)x+i c4mm iqp z)*ntc(b)m20 mm 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 travelh0.(kpn sohoe7)(jxm 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 travel 1.0 m-sj9ywc7lyl yrckye.c 2t 3(* ?

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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 d*v-zkc e7(: ic 9hdezradio 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 (th-ro;-(;zx*nn a siz7 zx +(ohts*n jlfe 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 transmi0kf0vtbm os,7 tted pulse return as an echo in 20 ms after transmission. Hoo m ,f0t7sbv0kw 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 Eartp* +ovm26mp vah (above the atmosphere) at a rate of abomp2+o av *mp6vut $1350 \; W/m^{2}$. 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 al38z7bohe*r kw9 ;xa dbout 3d 8re; zwabhx79ok*l$1350 \; W/m^{2}$. 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 distancezw6t x1d5 khv8t4tuc( 2.5 m from a 100-W lig4zutw k61(dtht 5 v8xcht 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:svl/ af+diq( at a distance 2.5 m from a 100-W light (ai+dqv/fs : lbulb?

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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 2.0pt1 l- kdvu0x;2 m.2qvpdvu2q0 mm in diameter. What is the average (rms) value of the electric m 2udvq2kd0p ;xvt2 -ulp v1q.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. Whac7 sj4g51h :nyfbtmy ;t is the average (rms) value of the magn4yg7h 51bcj fym; nt:setic 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 t6.il9zip nttq +0b+ 8yp:dty uransported 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 output of the Su bqf15z :-mgphn, 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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