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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 relationsh50 p ci-ebh. c;zubphizj88fk-x*yu4 ip for the speed v of the following three electromagnetic waves in vacuum? The waves are : X-rayszi;che. 48*u-pb bzu c jxy5h0kp8f-i, 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 tho575no gx.+ yzg.zruje following electromagnetic waves in terms of increasing wag+ r5zg yno5..j7xouzvelength

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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 through v7lf 7 /knmpp(uq10/zqyg..p k. tomm aacuum with a wavelength of 400 nm. Which one of the p1/pmk p .(zf. 0uly 7/mqaogmk .q7ntfollowing 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 least7lm+4ev c: oax8 .bz+er5cf di energy per a4zmc f.+:7ere5o8i lbxc+v d 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 ofr571ry int;ire (5 y wvitvupu1/2*fp electromagnetic radiation has the greatest ener 71rfurui n(ive5vwip *5y y2 tt1/pr;gy per 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 ko rp.:/ai(: lyyeb*6dli- obfollowing types of electromagnetic radiation has the largest magnitude of mb-dl(kblri:e*poyya.6 i: /o omentum 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 winw8 ,sbve2.xvth 3.27 m radio 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 broadcasqrtx3h/y1 twu7 abq2 /i-m3mcting 78 years ago at 1.31 MHz on the AM dial. What is the approximate length of its radio waves?3bh tq1ayucr 3m /7-m/x iw2qt

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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 effective transmittin*9u /i nctt+yjw0x+ gug antenna is equal to one-fourth the wavelength of the broadcast wave. If a radio station has an antenna 4.5 meters long then what is the broadcasti wu0t/* jug9 t+xc+ny 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 frkgg3p ce ;v+y-equency of 100.0 MHz. What is the wavelength of ykp g ;3vec+-g 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 choi0xptyql, 1fzakat)y0m9eh/p9 rip/ i :n )rs(ces best represents the type of electromagnetfz:ytir a1 eyip m,x/rk )9qp/h tls 09an0(p)ic wave 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 elect-yyjwv -+klcg)y82lk/y y nznh5/y v7ric field given by the expression (in Cartesh-lgwyy 2)+-7/ /5yyzclvyv8k kynjnian 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 01 7sp *y5/c4 qc4nbgcj zljheCartesj* 7 0nc41 plbyshj/ qgze5cc4ian 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 has a magnetic fiqx*p6 f*ippi 5rtvem1xf p,kr g --,x0eld given by the expression (in Caimr-q f0*fx, xg- 1k6,p*t ppreix5 vprtesian 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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