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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 mx437 3y; mj6pbzomdwall 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 produced by o f*,,ul1m k96j4au ajy,wngoa

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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 wi.ah1 n. zo b,9mlv((kqevgugv f5(-d ull 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 traxr o rv2o;2-jtvel 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 veloe v 7xdkwn *pxuvqf)4ebu8,-4city of all 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 throu9/un0y,3i d*zc8t wruk jj g6ngh

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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 9+bx a;+5xznw dkv-easlr7 o+ in the radiation field are fouxav 7rn 9bo 5d++kazl-s ex+;wnd to 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 onek6s9rs3sz 3i:mx)pl q instant at a given point i93 xsqp3sks)izl 6r :mts $E$ 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.) 9xn1s cr-qa/yycc w radiated by a straight wire antenna that is oriented vertical9w 1/n qyys-rx)cacc.ly. What should 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 arwylz 1qotzdrw )96k(: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 fck0d;gw 3tv3not 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 waveleyod +wis2o xz7wgt 7 qjq6qc*+qk 48;angth 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 wgslz/d-yu 9hy cg2* 0jave transports per unit time per unit area is thej 2ug0zhd l*y-s9/c yg

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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 exem//shz1+2fov-kowm5e 2uy bb 4 -gy ukrted 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 l ahv* .ozn4sjl1d)h m-o) c: 3+zuopmyists electromagnetic waves in order from longest uo+). vo* z34mdpoc-y) amzjhl1 n :hsto 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;mapmth. br :b*02p(18xi (y dyq jfbt l/xo4g a peak value of 2.0 V/m, what is the peak value of the magnetic fi8y(ol;bt/t :xmi1* a mhypqb (pfd2r4 j.bxg0eld?

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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 waves4bxzkfe10 / zc 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 wavcc9 * xbl yf(fm(zhc/8e?

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelengyczd h h c*q73-lc)kz)lk33nwth of a radio wave signal transmitted at a frequency of 7.2 M-cc)l khqwhlcz37 z)33 dky*nHz?

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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 1460?v2mxjk29 jy6g

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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 microwavro6a) 6 huwlo4es?

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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 tridcrpi -;1op ku/g*)b avel 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.ftm)gg,qb x: f.05unw0 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 -(fyxoqm/.n m-o/iaq1qb k; gphzb 4+ 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 lighuc;naovefa 2: b(tm9 6t 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 pul0 v*.us e0kzhese return as an echo in 20 ms after transmissioehv0u es.k*z0 n. 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 atmos3: 6b;kvpgw bjq;i s3hphere) at a rate of abo 3w;6isk:jb;qp h3bvg ut $1350 \; W/m^{2}$. 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 reachk-lx /h ,lwrg:sz8p - 05hcavoj dz1b0es the Earth (above the atmosphere) at a rate of about-v5z hacj8-0w xl,/d0g1o lbhr:kspz $1350 \; W/m^{2}$. 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 alndo0(b/np4eczl 7c 6t a distance 2.5 m from a 100-W light b4ce ol /6pdl (c0b7nnzulb?

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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 distance 2.5 m from a 100-Wjx lv0 *,dm+bd mx0+b * ,vljddlight 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 i apgqwbw44l na5o4;u;s the average (rms) van4blwq5g op4;w; ua4 alue 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.ec qh;k8 jmx(p* 0:kmw00 mm in diameter. What is the average (rms) value of the magneti :k;cw 0 mek8phmjq(x*c 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 transpgjt wc: qxp i:aa)yk+z*3f9a:orted 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, givelbu bi*d1 w2q:n 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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