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习题练习:Physics Unit22: Electromagnetic Waves

 作者: physics   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 electromjvb1-wyrkn a *q5j; .hagnetism 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 prodtrzc8u+u gpec*e+0* f uced 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 produceagdro2 ,k40d m ynsz;203iehhvl;d*v 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 thrqsg nyw0x+5 kk;1 bw,b/p /murough 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 elecom)y u+gb*/zx)i b *jblr(v3 dtromagnetic waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves u0 i*u o4lt)e)nd,aa9 lr*.rfln*ub gcan travel 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 thec/mf nnc yn76hpn7 :a) radiation field are found to decrease with dypnn:c)h 6nnca/7m7f istance 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 xwte r:-mn,nc1kw-o+1x u(xf u vg ,gw6g9/c othe east. At one instant at a given point its / w mwg(+-n-w fg1co ,u,c16ukveg xoxrxtn9:$E$ 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 wis0 145 0 wq9shds6yalsejy4lq .kep( zre antenna that is oriented vertically. What should be the orientation of a straight wire receiving anten1ajqyl4 e .sy5sp9k d0lshq4 e z(w06sna? 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 a0 2v22jtuj cu:*t ioicre

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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 electromagn8.o (-w ap-yf f yk8zjs-ffab3etic 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 z bg.how(oyoa1; 2o(z4 c+on owavelength 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 tra g f8u eqvc,*tg2jq( q xb(iozhe0+ra*55eh*cnsports per unit time per unit area is thec ( ezx(qhc ra+qgo*28tfveej*0*, g h5uq i5b

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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 e,e)fnp h(hy,i6cba +ew k)es.lectromagnetic 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 from jr0rc eae)e+c. vrd/-longest to shortest j c)+0- rde/arce.vre 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 EM1x2wq ec1qhlw5tt06j wave has a peak value of 2.0 V/m, what is the peak value of the magnetic f0wtc6w1tlq j52 1 qhexield?

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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 their frequemt: g)qihk35sncy 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 9i 1v9e:ho*,6 vy x7bgkwcks a-2.9-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 frequency4.uxesc +i *7dtzr9f i of 7.2 MHzxiz tf. u4ie 7d+9*src?

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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 ,xlgk q6pk*1 tcarrier 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 20 mm microx,gqhd:6zqvl32rh*s waves?

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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 trvse.vnt ,-3dyavel 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 lis-ea,l;7 qurl ght 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 radio stati vs r.fp3du w/86h 8ksduzdi05on 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 year)?4t,*h9)(dn5stf c8 rmatgbbu

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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 ;3fuz+j,u;kutuklw 1as an echo in 20 ms after transmission. How far away is f wu+t3k ju1l,u;u;kzthe 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 (k,v2+ ;ddocs;yvlya1 above the atmosphere) at a rate of aboutykslvv;o1y+ad2d; c , $1350 \; W/m^{2}$. 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 (abov ,5;,fjhs cyxue the atmosphere) at a rate of aboutfx sjh, cu5;y, $1350 \; W/m^{2}$. 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 electric96+uw07 wvc 2hztmdf k field at a distance 2.5 m from a 100-W lightc2k 09dt 6vumwf +z7hw 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 magneticga4+)p .t jjdc field at a distance 2.5 m from a 100-W lightc)ja4.+gt djp 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 izfcp :crg7fa *ctm/x aj.)2i5s the average (rms) v2g:.cx cj/fpa rz*ami5)7 f tcalue 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 a narrow bez.ly 2knw3 jxc/l5j j2am 2.00 mm in diameter. What is the average (rms) value of the malck2j jz32w / 5.jnylxgnetic 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 traoulo*j t5/(x lnsported 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 po,hh; c ynyg20zwer output 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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