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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 electromagnetism 3p2 s 9 d)8k0h,dpyivi3tuc apwere 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 b +pn*kmy/mx4x ettqfk712 kr5 y 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 produ3 2r8b trnsx4 dck-(627hktztu +eejyce 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 vacuumi t8cb9hnach fi7ky*)auv 9 ai, a3:/o 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 electrouekv+a-tpkxz( e f uyh08/)g3magnetic 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 trapzn 5 it;pni9,chh 2d)vel 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 fielerzkn ;,m q91kd are found to rnze m 19;qkk,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 q 0,2*r-m+zdadf.lvj kkqp9z the east. At one instant at a given poin0 dmr2.zjpz a lq-v*9kf ,kd+qt 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;i/p2 vy5t2x*u j aqmk oriented verticallxpt *k muajq2i/y;25v y. 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 j7c6sz9 1xluxare

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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 electrom,* g, pg0bzs,zn kotc3agnetic 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 w:o cdt93h ygw-n4m.hcavelength 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 toits - (j,kwi8ransports per unit time per unit area is the jwo-it(is 8,k

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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 electromagneticu8d 5lpq(9pdube)bir. ys:ag) v4g b4 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 correctlp/bo ok6* rhuo)8tb mw7g( iz-y lists electromagnetic waves in order from longest to shortest wavelei*wop()oh-t7krbo / mz8bg6 ungth?

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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 2.0hqk.*t;phe47kodd bqzpv .1 tknj 513 V/m, what is the peak vp kn.oke.v4qq j;kht5tb3d*p1 d7zh1alue 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 freqt;)b( e8un//ymtxxx quency 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.fkndt2k 7mt1 -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 radio wave signal transmitted at a freqa+, k8 zmep*wd x)7nhhuency of 7.2 MHz?a h,zx)+np7d 8m ehw*k

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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 ktbjtsc h(g0l :mo07(a(7nlfthe 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 2+8e i1) s v8zrwxub7j;k1a cgn0 mm 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 in 1hxa8oo g3 hzm8bcqv w9xhkd1; p,, +)rt3,jxb.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 travxx4.5rw+/a z*ba sw znel 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 lo76*g p 29o rrbhl7vovqci3 w2jcal radio 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 distance light travels in akoai0ebg + lwn6h95x +t+rjx9 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 return as an echo in 2w;e(va;4a-,htlt+ j8o) ,uuwgw n epr 0 ms after transmission. How far away is the reflecting object),;rapvtug-lwone,h+ 4; e(ua8w wjt?

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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 (aqq3y 9 y2ywh a--kz+h;:cvwmzbove the atmosphere) at a rate of about ;z hv--9wk+ a2wzmy ychqq3y :$1350 \; W/m^{2}$. 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 atmosphere) at a rw 7; :bulo.4gkdx ll2late of about4lldlkb27 l ;ogw. ux: $1350 \; W/m^{2}$. 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 vazafka) u 8/idi m2fxwvinbd7()27g /tlue of the electric field at a distance 2.5 m from a 100-W light bu(ibi27/iad2wum7t/)xk ad ng)8v ffzlb?

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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 fromt5 gcby;;a:nk ijgev :ln;+ *v a 100-W l5kba *tnngj; :;;i:+v egyvlcight 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 7crrm) e 1(srgmm in diameter. What is the average (rms) value of t7cs1mr gr er)(he 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 disnue:b+hv;l k5qi.o n1uui9(ameter. What is the average (rms) valul n+u9vk;u1i(e qsi: 5noubh.e 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 transported acrosy6w.yppqbae/e* rn 3y n, :2nvhx:8a is 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 9 kqj x;n.:rlg6mdt;ks*hg 0/y 7uwhfpower 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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