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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: 游客未登录  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 thevvy wwtgj v4(4b(ji hiv1)6 a5 speed v of the following three (5 hjgwyi bi4j v6t(a1v)wv4velectromagnetic 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 electromagmgz8noy1w6 pn z5z19h ei) 5cxnetic waves mn6 yc5z nh1ez) o9xpw1z5gi8 in 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: Electromagnetic radiation )vmy0bk n nk99travels through vacuum with a wavelength of 400 nm. Which one of the following choices best describ) yk0k 9vbnnm9es 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 electromagnepeu s ir +am;g9fa4:gcj)h p8/tic radiation has the least energy per photonegc;r ajf u+gm:)ip/48 9a psh?

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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 elcd ,zdmjmnz mhg-/.,1ectromagnetic radiation has the greatest energy per phomd, .-m1zdnz/j, mcghton?

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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 types of electro2(sf,kw87 bnhx0o hybmagnetic radiation has the largest magnitude of momentum per pb,o0h7wyk n82 b h(fxshoton?

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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 wn9(ggyd lmj5b .j g6z7ith 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 broadcasting 78 d--trb;bvm3ts55 ,9:e kq rty zxq oi-years ago at 1.31 MHz on the AM dial. What is the approximate length o5rvk5 ett xm9o3-is,zb;b yqtr-q-:df 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 effective transmt2b0x: eu9rnq itting antenna is equal to one-fourth the wavelength of the broadcast wave. If a radio station has an antenna 42b tqe: 09nxru.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 signk ju4q /;)h1w uckw7dxal at a frequency of 100.0 MHz. What is the wavelength of the st ukh4 wxq /)7wd1cu;kjation’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 best reprebo6-eze8yv,i-ql nta8 /w kn ob7 :cw(sents the type of electromagnetic wave associated with a frequency of ,-y aw6(tokv/n 7 n8lzobi:-qcwe8e b$10^{18}Hz$?

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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 field given b6;pz y2()wi 6jk cqhimy the expression (in Cartesian coordinat(m2p ;c )qi 6hyiz6kwjes):
$\overrightarrow{E}(x,t)\:=\:6.0cos(1.14\times\:10^7x-3.34\times\:10^{15}t)\overrightarrow{z}$
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 has11qlx. 2ch4/ar6ecuye ni ,be an electric field given by the expression (in Cartesian coaeu6 e/e i,1xcr1b4nl h.2cqy ordinates):
$\overrightarrow{E}(x,t)\:=\:6.0cos(1.14\times\:10^7x-3.34\times\:10^{15}t)\overrightarrow{z}$
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 electromagnetgy (:sej, afz9ic wave has a magnetic field given by the expression (in Cartesizygjea s(9f: ,an 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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