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习题练习:Physics Unit22: Electromagnetic Waves

 作者: physics   总分: 35分  得分: _____________

答题人: 游客未登录  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 f + aak3bvvs) 3lluo:x;r :eh0+/avutbor all electromagnetism 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 produ l2s.lhzxd +ewfi20/r ced 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 will auo/2 9yz7w uk,b sw+2l,jkz hproduce 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 vacudco46ng r+.uaum 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 waves2j.ti vx3 z qh(ap5zic-:sk r,z4. l9fk(jjqn

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves can travelj m.q du.2rmme .nuq 57xw/5vc through

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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 magnetic fie-i lsj97 hbk18f t6qkklds in the radiation field are found to fki1qt67kh l9 j8sb-k decrease 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 i 48qzm- hbp r08h8tvk1bdrqhugs (y96nstant at a given pointhtdhps(61- yh u8zmbg 9v84q0b8qrkr 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 a straight wt3a jh60b8ub 6xdn;tf ire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It shoulj3tdhbn6086 ;fbxua td be placed

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves arn gh3(6vp ut5he

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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 electromagnetic in nature,c :vb7o 6a5o *sed56 uwqfpjn?

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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 fromgj6:b-jg kt2u3mer z1

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy an electromagnetic 8 h2a4hkf) kvbwave transports per unit time per unit area is theah4)8k fh2bv k

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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 ycx7+f8j/e(equfx1)s shdo 2 called 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 wavo4tb* qyc ss-7bs-:,rf6+ xx qh4d ownes in order from longest to sqbr fy6twx+-xsn*7 oqo4d hs,-: 4sbchortest 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 a; qx6o 8nh;90sxkr qran EM wave has a peak value of 2.0 V/m, what is the peak value of the maoh9 86xx q;kqa;0rs nrgnetic field?

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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 of light waves if their q4mz3mp mgokz h o:;*0frequency 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 wavelengthb:r e82257bn+0pm dxin * gc7qjgjbuz of a 92.9-MHz radio wave?

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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 signal trs0jxca/)f(vvmx 5qyuw74z 8 zansmitted at a frequency of 7.2 M(c 80s4x/ mzw7yuqjv )fazvx5Hz?

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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 for the carrier wave in the station WBRN 7zhp 6 qppcib/rdpr t,i/vx +ru/8 0*o1460?

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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 20 mm microwav(pkjgfmag) ) 4+6)jsvmm e :zges?

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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 travel ir(nmr2,u6 rqan 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 ligf )ce;g1q qrd: :ikh9ght 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 from a local radio station to tac0lyzx:.k 3h-p (u) :k dbd9vzswnf :ravel 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 travelsk*5 d;)gsq;lskr)xn l in a year)?

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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 tke jd/tf2ma ;6hat a transmitted pulse return as an echo in 20 ms after transmission. How far ;de a/fmkt6j2 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 (above the atmosphere) s56v v:. c;xrwm8qcmq at a rate of about m;r.c5 s8qvm:q wx6vc $1350 \; W/m^{2}$. 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 vkvp;,73kht narth (above the atmosphere) at a rate of abouthvt7k,kpn; v3 $1350 \; W/m^{2}$. 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 fi6 cl+yoepgu3z2 ux,u6eld at a distance 2.5 m from a 100-W ligup62+3e z6uc,ol gyxuht bulb?

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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 cd+laef;;(r a l1ce(vllw b41of the magnetic field at a distance 2.5 m from a 100-W light bulb?rl+ f;vwlace d(elb 1;4(1alc

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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 out4+ d fy5verikdbjdy(jv0s6jt h5 esz9* 61m0v a narrow beam 2.00 mm in diameter. What is the average (rms) val54hz d59v j6ij0 ersdye(yj*m+v6skdf1tb v0 ue of 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 dits/b4 oq3a:u) n ahri0ameter. What is the average (rms) value of the magneti)si: /uonq4h0ta3br ac field?

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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 tran afo zr567ocn0sported 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 c aa 1m,vp99hooutput of the Sun, given 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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总分:35分 及格:21分 时间:不限时
未答题: 已答题:0 答错题:
当前第 题,此次习题练习共有 35 道题

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