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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 electromagnetism were developed bymrmks po+9w 86

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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 pabrzt*p-e u6 y(i-zg /hk,,pcf 6+fhoroduced 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 produhgt6-ztffin9p : ,uu) ce 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 t9a drqol/y14su x:t0;brk l8z /kdhk5hrough 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 velocityt7ikar i+qq.u y70z7oe9q asg o :;.sr 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 throughn,6m0e do4fyheq/xhu9qfkw; c0( 2mm0 /r g zp

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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 electrm dsa( u,8st5fxufkruw, 1z +,8+ezwuic and magnetic fields in the radiation field are found to sf+zww8k+dtuum(,58e,rfu x,u1az s 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 to tl/ j3myx)4dv mj9.f wzhe east. At one instant at a given point i vj4y dm/mf9).jxz lw3ts $E$ 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 wire antenna that is oriented gec xuih/of a2* :327,virizsvertically. What should be i sicroh, :i*a2f/3gz2vex 7uthe 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 6 v1)hi:ynoeq b)oanly6 25w kare

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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 inbrp( f2-epr8jgc n+*xl rxh1 gl):*n g 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 fr tnuz*6 o1aey9qrw -4vom

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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 pert jz;5h*1 x ps:cuj-a*.mc;dnv fb3e*v lh8wu unit area is the5 jdc8e*:j.vm pac- u; w xlhb*1;z v*tsfhun3

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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 cal 0w g 9ui yhq0;klcr662x5ohpmled 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 wavei+o.u4 pi bhw x,jb40fs in order from longeso 4j0,+xiwibh.b4u fp t 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 2.0 V/m, :c cjktk jhu5; 1z5uds6ds9)k what is the peak value of jh65c;sktdd9)s ukjk5 zc:1 u 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 of light waves if their frequency is m7ay *in14 ax.zg.fje$5.0 \times 10^{14} \; Hz$?

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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 wav:8t:muj xc - i,egb4lge?

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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:1hl+o/mu:bppat ckr t5 q*(v 8.qyzr a radio wave signal transmitted at a frequency of 7.2 MHz:tp: +p qrc1(arvkty5u*/mzlb . o8hq ?

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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 th)) ,cs nmwp md1.kj8fse 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 20 mm micdg p3 n.wd1gk:rowaves?

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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 trqt7 8s azy2f(vavel 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 ow5-wi ae qaz jh xrm:doivu 09;w1;-9m?

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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 takcb5 fk-e(iesx pil6**e 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 year)?x yf .qhbdlt:*5ug8 t(

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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 transmit-rvs(9 peeoxi1 4,z tdted pulse return as an echo in 20 ms after transmission. How far away is e4 p( oxsdr,iz1e -t9vthe 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 atmosphere) at a4 c,7pu(ztcwxjso c (+zx7*dc rate of abostjxp,*c7o 7c (u +zxc(4 zcwdut $1350 \; W/m^{2}$. 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 atmosphereaxw )e 6jyj7g0) at a rate of abouw7y e6x)gjj0at $1350 \; W/m^{2}$. 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 2.5 m fuoelvtg3v 9cj6l7b ; yw3 1gm:rom a 100-W 9ljg6y:l3ev13v;cmub7g ot wlight 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 ai;2p y0evuzo: distance 2.5 m from a 100-W light by2pv0: e ;izouulb?

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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 is the averagdgbe;rg llzxha8i -(9 vzr23 , f(mhb)e (rms) value of the 8lbfr (hm; )g-v(d3egb2ar zzxli9, helectric 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. Whas co*zl1sa4zkr4a1bi j6j pbjz2*3+ jt is the average (rms) cz4bpz s kbrjjj2a sz3+*41j6li*o 1 avalue 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 transpze 3tl.m.x7mn orted 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 Sun, given that abou9zp+ns tzc:i0 jcjc66t $1350 \; W/m^{2}$ 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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