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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 kqk:a.)mxqb *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 productnf:j6 b-v pi,t; iprhmerner --. ,2wed 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 fixlfh5dw/8dk* dbn5* teld 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 vacuummxz i 0hyfdm7i) 1ig44 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 wavkfi a)t of59 vv2 db,eo(k2y/ges

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves ca(q q 7vjc1lp3;tbv 7lslqqroca2v 947n 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 in the radiation fie ds 6wuzm5h1g3wa50f xld are found to decrease wia 0z6g3h1d fm5sx w5uwth 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;wvinz+ 5:;maq.ciw s traveling to the east. At one instant at a given point its i ziqc ;w:5+m;nawvs.$E$ 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 oriz-ekmhn8 -pircp 7 c5ec p2)i)ented vertically. What should be the orientation of a stpi7) hei5p)2r ckm8p zc-en- craight 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 waveh (.u 4:gf g0qeqm4qoedd;h-ks are

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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 electron(ide/s us nj,1,ck ,ve9)jcgmagnetic 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 wa0(l 3 m3zbnaicu7:pd34iywxl ,qv9savelength 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 lfq5h;q o(av 2zu2ce6w(+x 2q.ffetc unit time per unit area is the2q5qf.fu(o +6ctx;w 2f2 lvq ehz ce(a

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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 :.ltz pibox ly );uem:)f43rscalled 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 electromagneta s9ub fn*3ij ,qp6op/sk-a3 tic waves in order from longest to shorte,o*aikbj6/t -qu3 pa 9fs sn3pst 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 hm6.o t05ghahdy5oh v+as a peak value of 2.0 V/m, what is the peak yt m06o55gad.o hh vh+value of 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 frerc2)to3 pru gi;/t(naquency 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 wavelengthfn0am9v 58f1 7t9pradd,cyb q 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 rad(r./i 4qwh ltfio wave signal transmitted at a frequency of 7.2 MHz/.tfw4hl rqi( ?

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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 carrierby8ccnn.zk0zx*hy yu3u -zk w ew/ 3kx*d9+2g 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 micro7 k f7i6) get8gk7vvoae e4u )x(0hdirwaves?

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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 trav/ sh41zla7bjxel 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 ligh li.dhp(wx f34t 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 to7z05uypv k 7 jmsi54z i,izz/j 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 lii7k.r6c:xkcfk fi07g/1fk lt4wxmp3v a9 q1 wght 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 kb0cjzafby4 f3*/ ( bj 1v6iqrpulse return as an echo in 20 ms after transmissqif14f zjrjav06yc*k3 b( /bb ion. 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 atm fx4 *, pp nu,e.:xicjympuf,:osphere) at a rate of abou:m,,:yp ucxfn.i*p4 ,jpef xut $1350 \; W/m^{2}$. 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 th1j(ha vq)ly2fi8v/r2 vj2f tl e atmosphere) at a rate of aboutlrh/ tif2yv2 ajfvj8( 2v1 l)q $1350 \; W/m^{2}$. 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 distancexj+cg:uev n1k a 4tz7pk,s xi2*.a,uc 2.5 m from a 100-W light bt,ce2,i xa. a+ujcp: uvkgk71*n sx4zulb?

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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 fdo qr zpr0d- ou5o/8zsl2+.n drom a 100-W lighzsu+rdrd/z od.p82nq ol o-05t 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 i nqtvpe (09th/n diameter. What is the average (rms) vanv09h/p te tq(lue 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 tj al 5juzxmlsni 18w8fm: .1oc+b+m7khe average (rms) value of the magnetic f7+fkmmsi1xal5w ozb j 8uj.m1 +l:8cnield?

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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 ;g wb bimi*pm,k8nbf8(mz:x/sported 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 output3 kxen58+woe2z z7yod 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
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