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习题练习:Wave-EM Wave



 作者: admin发布日期: 2024-07-31 22:50   总分: 14分  得分: _____________

答题人: 匿名未登录  开始时间: 24年07月31日 22:50  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  
  10.19: Which is the 7kx cp-i0:-rzx+xmw 95aexhicorrect relationship for the speed v of the following three electromagneti x--05+h9xa ikx7xwrz i:epmcc waves in vacuum? The waves are : X-rays, UV rays, microwaves.

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.15: In the electromagnetic spectrum, rank the following electromagneti : j-gjxp(hk yy0;;pujfniz* :c waves i * u: (ijngkxz0 jyyp;p;-h:jfn terms of increasing wavelength

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  12.06: Electromagnetig5wafbo1yy6a/1 4lwzuy(ld4 z : f*goc radiation travels through vacuum with a wavelength of 400 nm. Which onbol(z1wafzog /56y: afgly 4ud 1 4w*ye of the following choices best describes this type of radiation?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.11: Which of the following types of electromagnetic radiation has tgudcn. o v8x5 atj*+h,fca1bm5kkyb 7+pa8 8w he least energoh+awk n 1x jv5 d kt8+cy.b58*gmpb,aau7c8fy per photon?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.07: Which of the following types of elvp 6s 7iqtf,2ggxtcj+,g9d +cectromagnetic radiation has the greatest energy per,+7qstg p96j gc ,vdc+gtxif2 photon?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.25: Which of the foleklzmm q opl9;/j)(;vlowing types of electromagnetic radiation has the largest jo( m lv;mkp;l qe9/z)magnitude of momentum per photon?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.04: Which station broadcasts with 3.27 m radio2 dxkej-hrd: t8ak69e waves?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.25: Pioneering radio station KFKA started bro5blfh, kcqiz3 84p)bc h q39stadcasting 78 years ago at 1.31 MHz 8c)q9bb3k4izthq5h f c3 slp, on the AM dial. What is the approximate length of its radio waves?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.07: The length of the nd:cdr,bnde*c4 *9e-.qtxde most effective transmitting antenna is equal to one-fourth the wavelength of the broadcast wave. If a :,x*.teecbdd 4- nddr nc9*e qradio station has an antenna 4.5 meters long then what is the broadcast frequency of the radio station?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.15: A radio station broadcasts its signal at a frequency of 10c 4tyo* h5;8d85b.ol *qy3 hovoairby0.0 MHz. What is the wavelength ofydv *yarb ;bo*t oh8c ioy.q54h538lo the station’s signal?

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.16: Which one of the following choices bez xkwf44sus)bw07x e /st represents the type of electromagnetic 4f4 w0bs)xw/xs zke u7wave associated with a frequency of $10^{18}Hz$?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electromagnetic wave has an electric 43-,v1bsebe l nnok,qfield given by the expression (in Cartesian coove b,k b,oq1-n3esnl4rdinates):
$\overrightarrow{E}(x,t)\:=\:6.0cos(1.14\times\:10^7x-3.34\times\:10^{15}t)\overrightarrow{z}$
09.48: What is the direction of the energy flow for the wave?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electromagnetic wave has an electric fg*:c8d8lr4u5 fk6rf q sayqi6ield given by the expression (in Cartesian coord sduf 45 a8l 6ikq86cry*gfqr:inates):
$\overrightarrow{E}(x,t)\:=\:6.0cos(1.14\times\:10^7x-3.34\times\:10^{15}t)\overrightarrow{z}$
09.49: What is the direction of the magnetic field at time t=0 and position x=0?

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.48: An electromagnetic wave has a magnetic field given by the er :o8oynx, ,sczdooz ;*. 8towxpression (in Cartesian coordinatesr8too o8zz;, sx n:yo *od,w.c) $\overrightarrow{B} = 6.0 \times\:10^{-6}cos(2.21\times\: 10^7z − 6.63\times\: 10^{15}t)\overrightarrow{x}$ . At t=0 and position x=y=z=0, what is the direction of the electric field associated with this wave?

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