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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 electro5eyp*/l .wutdmagnetism 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 isuo euj hm,*1f0y cx-lty;/cw( produced 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 859au y+d 6ehupr)e-:vgcnm r 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 vf h xeji-o7zkp.(fkd 6 u4,s9xacuum 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 velo o4ie65lsu7 w xx;,rsycity 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 throughxz n eqi +iw3gnk:,2)ic, rvd4

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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 rad(yv qx-a/yg c+d wg w9:qf g3zvqp56(iiation field are found to decrease ww+di gf/5(z9 -vxy gcqgy3:q (pq6 wvaith 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 one instant at a givem**gorl2p (g vn point its (g log2v*rm p*$E$ 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 straight.)4vms va rpcof,t60j wire antenna that is oriented vertically. What should be the orientation of a stra srjv4tcv6,a .p)fmo 0ight 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 ares1j6z hq4gm40 v5 vtyp

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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 in nanew vjp;igd-4. +5ieyture?

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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 wavele ac9k e54v*rvdngth 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 transport;xt2b:ixdz-l j a +uf8s per unit time per unit area is the:xla2 uzi d;tf j8x+b-

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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 k;i(l u8kby8 l5jmf m1 st8o6ian 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 ofvulkv1 ;chno.ve an ;)7xt/* rder from longest to shortesn vanv/f u)kv*;oxe ct 1.lh7;t 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 of8 yw ,l+gu j5e15 *ajt bet(a4tgumz;b 2.0 V/m, what is the peak value of the ma*ga 1 5gytt5bul;4z mejaw+ ,eb8(jtu gnetic 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 the +l2v/:rh lw:5fpbi wfir 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+(-oet fn. tyo 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 wavelengtmv d0 sf)kwe:c(v3u1jh of a radio wave signal transmitted at a frequency of 7.2 MHz?w3(f c :j0vskmd)u1ev

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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 s5t sljle;6x ss kaq)d5;74gf for the 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 i)q-j)4lcudljd :hy* of 20 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 travel in 1.op*5b:tg) zj0r .y.x8 .r,etz bs logb0 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 takez g;u;7vw f3ab 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 take the signal from a local radc )vmvi xi*g* 2o56jweio 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 (t .f59)hd5ufhgy/ yzzj73j orche 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 indicat w. ddc,iz.v9ses that a transmitted pulse return as an echo in 20 ms after transmission. How far away isc .z ,wvsd.d9i 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 Ea2fonxajcc 7 .n5 yri+bs9ax06 rth (above the atmosphere) at a rate of aborcxa o xnj+ y.n5bi7f6c092asut $1350 \; W/m^{2}$. 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 ed0lw akb4b20atmosphere) at a rate of aboudle0w02k4ba bt $1350 \; W/m^{2}$. 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 distanlmllwm0dy ; d 2an33xgdp73 .oce 2.5 m from a 100-W ligagowd 073mm 2l .n3;l lyx3dpdht 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 c7z-hvk2f4hsd*4 gy o a distance 2.5 m from a 100-W light bulb?chd-24zg 7 oy vkh*fs4

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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 2j6 jboy)c(vikj9z2p . What is the average (rms) value of thjk9jzo62)2j b(ipcy ve 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 1rredgvb77ds0 z/ o)mout a narrow beam 2.00 mm in diameter. What is the average (rms) value of the m )o7d/dr remb7 zsvg10agnetic 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 acrosmn1d. e-y8o:c kvcvm*s 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 i i)o-s.v+cudthe 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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