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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 electromagneti i 2dpa3j-t6i yqwxf ts43z05vsm 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*nlqj4 kxi.5nced 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 filmkz /ny;wl: )+r9fe zeld 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 waves travel through a w..r; /9qn+ s w (h6.mrbknwqc8ktdnm 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 all ; dspenti 9n1cm o*1:pm;kxl; 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 ca2k+qx;mdo cfi k7-m)y n 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 4wero pt n+80vm8 t77iwlyy 1fin the radiation field are found to decreyw pf v4nrlti0 8tweo+y7m817ase 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 trafu;k2p(3/ ) bab a( ubywfntx(veling to the east. At one instant at a given point its n (;tk(bufyua /3ap (wfbb 2)x$E$ 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 isa;kg 0atzg 34b o12kvz radiated by a straight wire antenna that is oriented vertically. What should 1o;z3gk k4avaz2 t0gbbe 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 a4nom1 0 5 tksgy8e9 uizosuxh-(33vfy re

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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 8rc1s)jj o vc)is not electromagnetic 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 wavelcy1lv ;v*/*jgmhl)i5nwabn. ength 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 wavk8 : e5domg7boe transports per unit time per unit area is thego5mob 78:dek

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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 wave9auy 8e p3usy9q -c(nuqye (6i 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 elec,-,gn6ymi d egtromagnetic waves in order from longest me yi6nd, g,-gto shortest 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 thegnvq1dcj.qhuqq6l7b ;q)-6 j peak value of the m q67q)1 qqj dnulgjbv6;-cq.h agnetic 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 frequency e m u6hyz95.jtis $5.0 \times 10^{14} \; Hz$?

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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 wave?9v9q*9 ce 7n *jw*nz.dpuwffy

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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 transmitted at a frequency oex74,ri; f oanf 7.2 nor;4 axe7f i,MHz?

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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 th o:dec6.)a 9iy, cfbcr*ajd2s e 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 micro-12efcn omv/s7 ohka(mv8c-:c 1pg a dwaves?

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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 tk l-6ptavko ovy:a (5;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 light to travel 1.0803 jcc/,n x( orjwpmh6c)mpp 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 travel 2 az6 zwq* vsz3zs*82ae0 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 /e-35.d a ldm 9 3fv5di7ulkekay/oppdistance 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 indav /8sze69.t kmhtz+2 ncq *koicates that a transmitted pulse return as an echo in 20 ms after transmission. How far away is the reflectingc vs.akt62znm+/t zk* qhoe98 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 re;qp , y;mz3k vl2znsh2aches the Earth (above the atmosphere) at a rate of aboutvqk;,p3l2z y;mz 2snh $1350 \; W/m^{2}$. 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 p0 zw.of*ue5caj *h+vreaches the Earth (above the atmosphere) at a rate of aboutpa.0co5jh*efw* z+v u $1350 \; W/m^{2}$. 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 aow pa/uc3 1wi(qwh4n+)u w3 2xiku7aat a distance 2.5 m from a 100-W light bulb?)wnoipauw7(43 xc ku23/iw qa+ huw 1a

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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 2 q f+)u1e ygczqyl+2qmxt d;09os9nx magnetic field at a distance 2.5 m from a 100-W ligh09yl92xxsc)+ oemqzf2utng +; ydqq1t 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 nar.fj5k7q7 +1hyjayf b,/9y+occp fktgrow beam 2.00 mm in diameter. What is the average (rmc,kyf7/7coyf 1k+jq9 p a t+gbj5y fh.s) 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 out a narrow beam 2.00 mm in diameter. What is t-mfs:f -qn-ee he average (rms) f-m:e- -esf nqvalue 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 transporteda3crsmdt bba5n(lk gu00;uy8n 5 * g,t 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 powezkw93 tt7pu6qhr)) rsr;t7y dr output 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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