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习题练习:Physics Unit22: Electromagnetic Waves



 作者: admin   总分: 35分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月28日 10:07  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  
  The basic equations for all eqywv1;t9gv4 tghse6/lectromagnetism were developed by

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electric field is prtbhl); 9zwj s rhz8f4g 1sq5)hoduced by a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A changing electric field wnu+ 7n+ 0guwt8srgw uvx;a:)iill produce a

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic waves travel through a vacuch2+d)9rowjr um at

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a vacuum, the velocity of all electromagnetic waves+f *+bb zmiyhbm-m6s05fv 4u -fwvfg1

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves can travel throts 9 pfemp76t9ugh

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The strength of both the electric and magnzuqna;.2 81is4fqzcz2we ;h petic fields in the radiation field are found to de.zs iawz;2u1 ;8zn4qpf 2hqcecrease with distance as

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The $E$ and $B$ fields in electromagnetic waves are oriented

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electromagnetic wave is traveling to the east. At one instant atguaeqrot1ssn 0(u 9f+ brh0 2( a given pointu9nbh( g0t1(q+ra so 0 2refsu its $E$ vector points straight up. What is the direction of its $B$ vector?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electromagnetic wave is radiated by a5s sj1z0b :isap0j2 uc straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It should be :5 c u2 isssj0az1pbj0placed

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves z+7qcmh8+sgp p7na8 n are

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, which is not electromaqkrj*.ku9 0 rignetic in nature?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Visible light ranges in wavelength fdqiv9ix(d-9 c (v zm,irom

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy an electromagn4ms:;k lbrh,h etic wave transports per unit time per unit area is the;ms: k,r hb4lh

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The force per unit area exerted by an electromagnetic wave is c(nc z :fn( sqrtgjh*f63t7a0called the

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following correctly lists electromagnetic waves in oro7xt a*hgv)-885lp: s nmdzgider from longest to shortdt8-a s*ohmp5 xl)7i8gn zg v:est wavelength?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric field in an EM wave has a peak value of 2.0 V/m,y2 vtt y6uzmlb8.x p/uun;k.1mzfz ,, what is the peak value of the magnetic fi 6nfuxv8.tu;ump,, .lz1ymy2 / bztzkeld?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength ofn,itl )qjm:l yl43v tl/ yk;x2 light waves if their frequency is $5.0 \times 10^{14} \; Hz$?

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength of a 92.9-MHz radio wa6cs)x ma y uyjq--7cj+ve?

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength of a radio wave signalqwzk7ezag * t u u7i;4-9x/ rdt8l-mpf transmitted at a frequency of 7.2 u-iw;r-/fg qt l7et8zkd7 x*auz 94mpMHz?

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength fozz 06 fd6+:dnx.2x5oczr+ac4y:y3st six yid r the carrier wave in the station WBRN 1460?

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the frequency of:w1 n3bgch)+s v1xb ju 20 mm microwaves?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How far does light tmo+ gn*y:ojek 4jas/ )ravel in 1.0 ms?

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How long does it take ll5vaf-qoj8; .i,d xuzight to travel 1.0 m?

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How long does it take the signal fr3i- 8luo,ns wuom a local radio station to travel 20 miles?

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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How far is a light year (the distance light travels in a year)ntoc1 -e/wfkw.- h9m yt 2g2jx?

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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A radar receiver indicates that a wa-yc9mkypv t t*4fsl 01,kh:transmitted pulse return as an echo in 20 ms afte*s1,m-l: ta4p kk0yhf ctv9 ywr transmission. How far away is the reflecting object?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Radiation from the Sun reaches the Earth (aqw.z4hyv *v vk.w8+jl bove the atmosphere) at a rate of abo4vwhq zvj *.wk8.yl+vut $1350 \; W/m^{2}$. Assume that this is a single EM wave and calculate the maximum value of the electric field.

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Radiation from the Sun reaches the E dbf nzt)w:j-4arth (above the atmosphere) at a rate of abouj4)nbdf w-t:z t $1350 \; W/m^{2}$. Assume that this is a single EM wave and calculate the maximum value of the magnetic field.

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the maximum value of the electric field at a distance 2.5 m fromv tw kqajl5m9 paz;ux7730 sx,mq 8q;n a 100-W light bulb?,7u5kam7 ; vx8j3lx9tnspqqzwa ;q m0

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the maximum value of the magnetic fie-k b+h -vadia;we1i 92kuxwv8ld at a distance 2.5 m from a 100-W light bulb?e-w h;kik 9 1 vba8idx+wau-v2

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15.0-mW laser puts out a narrow beamca4z9.v jbo*chuy 0 *g17 kwzx 2.00 mm in diameter. What is the average (rms) value o* 7wu0*9y z1jx4hac.zobcvg kf the electric field?

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15.0-mW laser puts out a narrow beam 2.00 mm in diameter. What is thesqxfep45f4n*:a;ybvjht l0 / average (rms) value of the magnetic fiesf0lt:fax 44 jyvq* ebn/hp 5;ld?

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much energy is transporte;,ghsy77s d9ctzl e6nd across a $1.00 \; cm^{2}$ area per hour by an EM wave whose electric field has an rms strength of 21.5 V/m?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Estimate the average power output of the Sun, giv:/r 3bjym y-vr1cwf +j1sv sa)en that about $1350 \; W/m^{2}$ reaches the upper atmosphere of the Earth. The distance from the Sun to the Earth is $1.5 \times 10^{11} \; m$.

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