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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 developedj0 m 2a mzlbb*zs98ht /dpy7w8 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 prodv2f m mq)u/g(*kk7o mnuced 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 prod uvx.hw-+m9s92mbnzgw 26 neiuce 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 h* /8h2a tji wpkzlk+z11u bw(66koqn travel through 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 o hehil g5csq9( 56l cb2qb.y9rf 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 travbt1)ydeyk4q . s kb-35x xtbeffj5:r) el 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/ch qgt/8tqxy7g9k54 ge3wau+b j kh6 fields in the radiation field are found to q 6a7kukgj/9 ghe54c8+ gbtxy t3hq /wdecrease 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 the east. At one instant at a given pw c2g -gd1hynz3+jy1yaa 4) j a,yxg;soint its g1jyx+jyg a3 yawn ;cya1gs ,)-4z d2h$E$ 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 wiren 50; mw bmma jjy5nu2*93xjhe antenna that is oriented vertically. What should be the orient9mwmnhu5j0m5 *nj xye 3b; aj2ation 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 q hnrnug)+ot g 0,-gj7are

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, wha3exdtl t *1u s1*/j qei)2vmlf*ja, lich is not 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 f a;kd o*g)sjkv; unwy,6nso;( rom

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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 wa4k*7 ;+bq ahar+*f+4yxjzilzm pqay4ve transports per unit time per unit area is thehzylf m4a7z kia 4y*a p+j;q+x 4r+b*q

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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 exerteut,n.u (hq)m;6;lou0reelf l d by an 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 electromagnm /p4bh eccpg1dep()vf0 5j5uetic waves in order from longestm1ebjh5g( / upfv)cdp ep05 4c 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 2a g68nchf 1sw7.0 V/m, what is the peak value of the magnetic field?nhw cg8s7f1a6

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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 freque-hv8pj2.7:jvo 9sy t)a ayqbzncy 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 -tiltv4, cs/u/ i* zpx:x*yh qradio 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 transmittn lek1-:x zaj8dudo,f92xc/ ied at a frequency of 7.2 MHzj:on82 9ku1d-e z /axlcd,ifx ?

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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 station mci + lbp-a9ibtxet()o0jr8 /p-q h6t 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..3hozrx*wghtz q7, zes d.2i 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 1.0 mm 77.ii7xq ff /;yyd9vdkj,trs?

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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 lix4(u 9 ;-es h-4tqle4xigqr i9h0 xiqwju 6(nught 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 station to travel 20 mile5p,cp1fvh b1 as?

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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 (t1egpt9n j ) qg(lc7)byhe 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 transmitted gt3k09r 1.ifpl7vivwpulse return as an echo in 20 ms after t.rkwi37gliv vtf0p 91 ransmission. 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 the3j.;js n1-cjhj ,z qje atmosphere) at a rate of about sjjj.-je qz;1 h3jc, n$1350 \; W/m^{2}$. 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 Earthjn o-e*(vbfhv .x2b2f (above the atmosphere) at a rate of about xve *o.fjv2-bb n(2hf$1350 \; W/m^{2}$. 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 distazw; 0y8h)i,- kofr sflnce 2.5 m from a 100-W light bulb?y f;z, ik-frsl0h8o w)

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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 of5,y:uqm u k2ghw yh*+u the magnetic field at a distance 2.5 m from a 100-W liggmu yuw:uk,h h 5y*2+qht 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 na5u2,; jjce7evpqy vk-rrow beam 2.00 mm in diameter. What is the average (rms) vaj,vqeyj epkv c7u 25-;lue 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 beam 2.00 mm in diameter. What is the averageuzzazx fx;v b49-*u,be3,bmk (rms) value of the ;9*x z ,ubbbmz4a, ezvux3f-kmagnetic 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 acrosgut.d -a1bz7cx 2 swzzwie+37s 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 p5ssrgqy2qhyz5 )3-ar ower 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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