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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 correct relationship for the speed v o kfm6u2ah 4: ra:;onbsf the following three electromagnetic waves in vacuum? m6ahr;nasub 2 ::o k4fThe 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 electromagnetisd02 p tymk+pxeek/o d/9ci5 6c waves in terms of increasing wavelenpi05p /e/o69m+ tddy cxsek2kgth

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  12.06: Electromagnetic radiation travels thro2sdcvm2g- r7 wugh vacuum with a wavelength of 400 nm. Which one of the foll7s r 22-gvwcmdowing 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 the leastr*6isihmo)gv pl cj*n1 +11rx enerrmoj*+hgxi 11c i)nv1ps *l r6gy 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 electromagnetic radiation has the greate7k1nmnnjt cuw ,k+by agy8-9*st energy per photoajt*18n+-,yn9ybnkkcw 7 mgu n?

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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 following sx-65pw8 rbv ytypes of electromagnetic radiation has the largest maxsv685bpr- y wgnitude 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 radio t:55imr ;n;- b1x:orkh zy1 os f7rfnewaves?

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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 stati h y flui4mqv1(uku+(-on KFKA started broadcasting 78 years ago at 1.31 MHz on the AM dial. Whatkif+4m(h u1u-v y(lq u 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 most effec1x8 ejl/:bgx7p+ sf-n7 2v jg9u oozyytive transmitting antenna is equal to one-fourth the wavelength of the broadcast wave. If a radio station has an antenna 4.5 meterso1y2lzgjp fn7 78 bu e 9jyv+x/:sx-go 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 100jfrv )/e k7a)j.0 MHz. What is tervj /a))k j7fhe wavelength of 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 bestl b1 cw4y krc41u9rf)tcny/t/ represents the type of electromagnetic wave associated n tf/ly)b1uk1c4 yccr49r/ wtwith 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 fieqzc eis6j-l8iu e9t:6 ld given by the expression (in Cartes i ej6-z86els9:tciquian coordinates):
$\overrightarrow{E}(x,t)\:=\:6.0cos(1.14\times\:10^7x-3.34\times\:10^{15}t)\overrightarrow{z}$
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 field given by the expression (in+) 5gh5. gfz tuhcngf8 Cartes5+c.) gtn5fhzh8 ggu fian coordinates):
$\overrightarrow{E}(x,t)\:=\:6.0cos(1.14\times\:10^7x-3.34\times\:10^{15}t)\overrightarrow{z}$
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 hqb,eu )5 1ql abpcn4ca9r kw7/q ewjae4.q2 -mas a magnetic field given by the expression (in Carte) r2 4b5q qmwca1 -qpwa7eeq/c., n9ljkubae4sian coordinates) $\overrightarrow{B} = 6.0 \times\:10^{-6}cos(2.21\times\: 10^7z − 6.63\times\: 10^{15}t)\overrightarrow{x}$ . 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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