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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 ele1cwp. 4y osws zeo97:xctromagnetism 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 bys ;m1il vm;5(bmlx .yw 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 fie.ltky/:i f 5mdld 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 tradagm 5uj (0n-oh (dim2vel 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 all electromagnetic wavevdp f*64bv f 8s:bxgb*s

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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 throufh7uyru:w8e :o.k d,z gh

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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 fie5mt cx9*goo xyrn4e9:lds in the radiation field are founxo9y go9 rn45e: *tcmxd 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 travelmgwtqk0h e)e mz5s.3 9ing to the east. At one instant at a given point itsw35gm)zshe 0 kte9m q. $E$ 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 oote k*7 k4migp*/pi.straight wire antenna that is oriented vertically. What should be the orientation of a straight w*.p *gp4omeit7 /ki okire 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 wave d:0 ,pcplqns-s 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 elec62y5 gd7tjr nr, gslz)tromagnetic 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 wavelength frgm2 4*:g j*+ymztrkfp;w:jiwom

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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 k4 w2cn a5rv)otransports per unit time per unit area is theorn5)kvwa4 c2

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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 calld e2k a:sdd n3izr4-e9ed 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 electromagnetim6k-mqg 1w ,gke0 *u.bm 6ls+uo*semvc waves in order from longest to shortest wawkg-qes ,svm0*6u1 om+ 6m.emglku b *velength?

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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 val9ylpge3q+;mf;a-db3)vq ahrobmx3 gv1dw 10 ue of 2.0 V/m, what is the peak value of the magnetic gr h1q y;p gmdb3bfd1 vqm e)3v+90lwo-ax;a 3field?

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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 z24b5q-0o iw*c xmqvhif 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 dm9 7d4p l(za 9y :8pcix0xcrfwave?

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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 trq8e( fpx o2 v0bint3wf/np6( iansmitted at a frequency of 7.2 MHzfn w(i(xqo6 t eb/p0f2pn83vi?

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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 w tmv 18m vcxi7ep:,ig:ave 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 w( gu lu,ux-ldurd9ol dywu+ i6 ;/0;s20 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 i.yno:gv3phg 3as5rc 8n 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 1p1y6lc 5rh3i:q ymb0 b,op1vz.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 to tr7+gc3de(a c mmavel 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 7dgt cr-oh,u,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 pulse return as an echo in1 a+z 2kavbc7p 20 ms after transmb27 zpkca+a 1vission. 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 atmosphere) at a rate5l 5df kr(u1zn of about fzr5dkn u51(l$1350 \; W/m^{2}$. 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 (abo3a -p (l wszlz74lw+bbfc t-(k g ds2v1g1a+cbve the atmosphere) at a rate of about c-kl+4wa3 2v7(+f1a-w(pl gltsbzsz b1dg c b$1350 \; W/m^{2}$. 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 distancjd0h8lu ntex96h( * bce 2.5 m from a 100-W lidt ( j8e6*h0cbu9xh lnght 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 mhj z0 yk63u* v;vl;yyvalue of the magnetic field at a distance 2.5 m from a 100-W light bul yk360hu;zyvmy l *vj;b?

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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 diameteo8fj 7 /wb* bqyz,(ugcr. What is the average (rm yz8 ubb7gf,jwqc*/o (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 nafcv :.gsus a5;rrow beam 2.00 mm in diameter. What is the average (rms) value of the msc. u;f sa5v:gagnetic 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 tran:/qhf*xzhxadj 8v.2 csported 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, given u8l nl)pa -3-tp6rlx bthat 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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