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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 for all electromagnetism were developedmy(yzg+s e (h- 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 prep f),jwodx7 7jk 9 -i yh/+rx(iytvklox z(9,oduced 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 produce)qjkoejhy3l/5n/f a 6e5b8j n 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 vauyar8.-b gh +g y3x8ubcuum 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 ww8 ibo /v50svbaves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic wavesdas77jpdl4m-u-x; in can travel 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 fields itp; hr/slr*1fn the radiation field are found to decrease with distance ash;f*lp1 rt/r s

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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 at a eua5)12o r xynsxn0d1sdp qn8qds. 2* given point its*yx n ps1 rx1.5d)0n2soqsd 8qa n2ued $E$ 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 wire antenna p p) bu3x(4lx4xc ;vr.bjkq1ethat is oriented vertically. What );u kex 1rb .p4xqblv3c p(4jxshould be the orientation of a straight wire receiving antenna? It should 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 ar-wl ok-b,tf wmzi:jt3 8lg+h0/ ao)tfe

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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 naturr2j1wwwz w0xy6x sx2 )e?

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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 wave 9ie47 jof,k);up,l*s mqpgps. +en ullength from

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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 wave transports per unit time per unit area is tm*h gpfw1w .na 6,2pb amuyc;z 6*jc-mhe uz6gaypp 6jhb;*1* cw, 2awmnf.m -mc

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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 w6j 4 tvj*8jm;xhuw1nqave is 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 l:dr. y4kxyl -waves in order from longest to shortest wavelekdly.4lr- x:y ngth?

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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, what is thc6uhav6s7ehb; .x-es qp.+lp e peak value of the magneti epa +6sxh;csv7qu-..lep hb6c 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 aifm 2sx5hu d4 ;+fp g*qgp7-nwaves 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 wf6 a;a sl mb+nwk6cl7wk nc+69n*r4fmave?

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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 transmitted9lxtp j 0(c6sf*w wpfgicn-pbm:c80 + at a frequency of 7.2 MH pwppbffw0g:jm(0s clt 8 c*x9-cin+6z?

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelengusz; v697tpwxagko*j 1i86veth for 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 20 mm mx.p l3ceul;8s* lv 1m h*zdxv8icrowaves?

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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 in 1.0 )agnz+prlwmn5o aic5 7 y8 rarotm6lg254,k: 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 light to travel 1.0 ma2 l5t8n;pfh 2jd okr4s4v9ay afsdq l)0yk9:?

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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 stat 3n a14a1vewjlion 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 lpy4blbt1k (4s kz1ng6ight travels 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 that a transmitted pulse return2yq0a l-of r6d as an echo in 20 ms after 62-fo0qday lr 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 (above the atmosphere) at a rate of abov57(fvva :zgvu7vz: (a5 gvvvft $1350 \; W/m^{2}$. 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 Eartid6;l jgt r1b,h (above the atmosphere) at a rate of aboutlibdj rt;6, 1g $1350 \; W/m^{2}$. 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 from g +np gfqn6u5th6*ss 5a 100-W light buf g6u5p+gt nq*s5n6s hlb?

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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-zh+8zqn ( mjy magnetic field at a distance 2.5 m from a 100-W light bu n zqjh(-myz+8lb?

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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 beam 2.00 mm in diameter. What is the ave1z9v lp9 v,i4kqlh;herage (rms) value of t;1 q k9,vphllzh iev94he 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 the avp 97gcc3x2yzl erage (rms) vax ly72c3zp9cg lue of the magnetic 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 transpor.tqqg 7 ,;c *g6iuqd) .cojqefted 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, q;*j bbtjz 3s7 2bdrz0g avc/nwql46/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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