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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 electroma, 2cn btg.bnz+zga.1rgnetism 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 do ur.dx*9yv7tov :u/produced 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 fieldl;bh(cej61le3m n0a 3p tos )e will 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 wwt.a9tigj 5;,fw0 i n/lswl7eaves travel through a vacuum 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 a :ae59icsda)aq7 7ain ll electromagnetic waves

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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 through6e w xnxp c1;j)ndu1.9ce,owh

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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 magneo-r,.fwx / 0wlaqv-tqzpdu )7tic fields in the radiation field are found to decrease with distance as.v oxzq7f-u0 pwla )w/-td q,r

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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 wavc-w-0oq)aw; bp (q2ahw5hn tze is traveling to the east. At one instant at a given poip)zb h (w05qh2wqon--cwta;a nt 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 wire antenna that is ori080sqe x,jymhj(f jtn m9sd7.ented vertically. What should be the orientation of a st ehjq0 d7nt9 m8fs jymj(.sx,0raight 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 ars)n--olng8n*8s eqo: ;qt gxq e

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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 electromagnet9he i/kb19ej ,9 kjrt;zzen:bic 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 i w ul-)r3d u5aw2(sdoun wavelength 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 pekt2rcx.*lp 3dss;) tx r unit area is the )dcpsrt2l;3xx .*skt

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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 .rd)6 fekp8d dexerted by an electromagnetic wave 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 wa 7mr8*k9 qnex3 fxo9hsves in order from longest to shn7 f *ex3kqmh98s9xorortest 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, what is y/bc y7mbl(u7p alt83the peak value of 3up b/(t8lalm7yy c7b the magnetic 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 frefzuxb5-d kemu*z z+93quency 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 o0u6g tj jp5an lyhl420f 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 wyrbh; b )9xda 2:rjchs(82+ eetdy0ba radio wave signal transmitted at a frequency of 7.2 MHyh2es)+xjr brdbwt2cd(; 0y:e89b ahz?

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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)vkbtvyb y4f5pgl94 , 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 khm-x 85tz+ek 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 travel f0lda:gwc/ 87nps/zt 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 light to travelh. nruuc rb9( q5q2o) l0vhwq5z+tg /k 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 radiog5g4efk(ntu6 ljs a56 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 d9es u47idzch 2dod znp-( 4:ejistance light 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 puldkb5t(g x,8wsse return as an echo in 20 ms after transmission. How far t 8wdx(g5 bk,saway 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 (abovve,ok9e )x *ace the atmosphere) at a rate of abou k,ex)*eo9cvat $1350 \; W/m^{2}$. 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 Earth (above the atmospheremd s8(zlkmg*g( urm 12h/iw )a) at a rate of about (gdil*a/(rgm m zms2h1u)wk8$1350 \; W/m^{2}$. 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 fmm164qbq:: izxwnb8nhf by-cu9e0 7 electric field at a distance 2.5 m from a 100-W lighbf b891c bzui yefmxm 67:-qnh qwn40:t 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 of the magnetic field at a di s(5p rc*rmo0yf :6 v;vegg*4mrx9 awnstance 2.5 m from a 100-W9rmwr6y5*( 4 *ce go0ns:v rfga x;mpv light bulb?

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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 avo4vx18oj j4crerage (rms) jcoj1r4x8ov 4 value 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 o -)i kc oxajer4jbduf4a9 0 -z,f7a5jxut a narrow beam 2.00 mm in diameter. What is the average (rms) value of tc x 5,f-jxf)uzba4o0e4-iad r9k a 7jjhe 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 tr; 1emj)te pmwf .ft82oansported 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 thn+pu ekaa yr+bl4:64ye 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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