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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 spmr 6nas3m0a;oi6rb wcs 3s d9hpz:,p7eed v of the following three electromagnetic waves in vacuum? The waves are : X-rays, UV r3r ph 7cp b6n9r smo,aw;3smza:id6s0ays, 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 electrongm4 q7w n5s idh(+6jqb,tdb9magnetic waves in terms of increasing wavelengtb+t9md i76nng(sw5j q,db h q4h

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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 travex8vb lrr )jb0qabi8*7ls through vacuum with a wavelength of 400 nm. Which one of the following choices best describes this type of rbivb7 ajx*rb0l r8q8) adiation?

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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 electromagnet v(m9cxnwmfv5a-t7tb8qi3 x 6ic radiation has the least energy per phot9wt - i vfx 5qc(386t7xmmabnvon?

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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 7uuve h,9 hxi7c09k lkfollowing types of electromagnetic radiation has the greatest energy per ph ukv 9u97hck0 xlhie,7oton?

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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 electromagnetic radiation.gwg )l*0u*k b xtmz:d has the largest magnitudgb*z d:lu)0mk.wg* t xe 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 broadcw v;a;l*cy 5kaasts with 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 years ago atqbk15 5; l7tcoim zq3qci v-y, 1.31 MHz on the AM dial. What m3tbz;-5q1 7ck,lq oqi 5c viyis 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 effective transmitting antenna mn(n5vl,cn *.nig, 8rez nb f: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 broadcast frequencm.rf,znc 5:v(n* le nbngi ,n8y 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 broadhp (+sgx+3 sk ;wh2uu 1mmyy5kcasts its signal at a frequency of 100.0 MHz. What is the wavele5gm umswp hs2kkxuh;y3+(+1yngth 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 ou;ed5aoce5nja ypsy6 yv(6la 7c5; er:f,r7best represents the type of electromagnetic wave associated with a frequency osy7faj:cl r6acp7edyn5a5; oe ,5v yuor;6e( f $10^{18}Hz$?

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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 g, ba*w6wgoic6 pa80qby the expression (in Cartesian coordinate,q awp6ib0*8 oggacw6 s):
$\overrightarrow{E}(x,t)\:=\:6.0cos(1.14\times\:10^7x-3.34\times\:10^{15}t)\overrightarrow{z}$
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-zsl az+9 ug9q the expression (in Cartesi-q9zzu g+9al san 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 field :7-wy3n irdrw ae)t)vgiven by the expression (in Cary w v3wne at:r-))7dirtesian 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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