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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 electrol;ixpvnu 0n( *magnetism 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 aphorvuzulid +c /2g40fc2cq k5.js 37

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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 produ*2j 4pbnvjxiw 7x,jp;ce a

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic wavesog.wn2k*ro fb hqo- ro);)+wr travel 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 ag )bc m5hiic)1ll 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 1e m8um 7pwt;ttravel 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 fiel);o+03xzdy tqsb q 2qnds in the radiation field are found to decrease with dis 3xq 2ndzb0qoqt+ )y;stance 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 one in38bc r1 dwn-0mac; rslf-p0i xstant at a given poinlbca 03nsr-rdm8wxp i;0 1-fct 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 543 -fnv8uxn wr diegt )q7dq b5b.sf1is oriented vertically. What should be the orientation uvex4ngqn5-1fd ri s .5w7f8qt) bd3bof 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 arerbj slnx;,j r ecp-7+b.;jg)a

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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 electromagnetic in nan lfod-e1 0dyue)xoit5 ,tiwg./u n+.ture?

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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 f c.c/ d fkwxbivm.qv(hs8gy8d:1u)q3rom

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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 w5,v o3m 2djwvml p*fek)z m:oeumu0)ma;j-9 per unit time per unit area is the0emf))o-;vem 2mkua w:5p3mj *mu wlzd9vj o,

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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 a93 ntzn9. om6v/ vhexnm+ifx-n 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 lists electromagnetic waves in order from cqz2;oma5rdl e ny 401longest to shortest emo2zr51ydna4 c;ql0 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 val 1 fw7a:fkduydz7nh)+ ue of 2.0 V/m, what is the peak value of the magnetic field7na+f z)wu 1:dd7fhyk?

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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 theirsnfjt, gu**g0 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 wavdkmz 2uww.(z xm 3a )sp,an 93v2aif7he?

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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 frequencq1xb69(bqy:m 1 snu ce9-lxyoy of 7.2 MHzn1 - (ou9 1qcy6mqylx sebb9:x?

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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 s09( qxuwbvou(/ dq:f 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 microwave.5utct k 1yb9es?

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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 1822nk3i 0q hoj i3t/7pielq fj.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 1.0 maz*c6n2y j l f pn7zho1p9,okn8c,x7n 4plsn8?

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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 travezs.g; v(nqva:j6*:ijg yh;r f l 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 a y2ye:ny0b by 4s nyqf41ear)?

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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 tranuqen*,s )bjx1smitted pulse return as an echo in 20 ms after transmission. How farjbuqx ,n1 e*s) 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 atmospe l 23j4v5q 6oirs3b6 s)pncxehere) at a rate of about 3v2s rnisojl)e56p6qc 3bex 4$1350 \; W/m^{2}$. 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 ) 2atp8c:yznm94 yi*x:g fd5f uui5 xw(above the atmosphere) at a rate of abo ix mincw*uf5 dzfyau8x9 gp24):5ty :ut $1350 \; W/m^{2}$. 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 distanc zgsjxjq0w b.-tv0(uaw 2j4 7re 2.5 m from a 100-W ligbqz0a 0 wj27jvj rs4u gw-.(txht 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 value of the magnetic field at 0 d0km wvy jjesu8 xktz4phb+rg+ *4;*a distance 2.5 m from a 100-W light jw+v+ s0ugpb ;jt*k8 dzymx*0 hekr44bulb?

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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. 7yhisc kq1l+ 7What is the average (rms) + 71sklcihy7q 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 diame z ir:qsbm a69zj68tv.ter. What is the averagezt686aj. i9rmzqsb:v (rms) value 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 transporte 0a f7cboz7wk)t15pmz*t+d i xd 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 thatd+m+ ja sb7p285g -c mh4epgwq7+iagj 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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