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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 electroma)e/)wy9zljp ignetism 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 bgoboi5vudhu (t/67r 8y 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 h nam4y2w) oj,87qhz7nnj ( ajproduce 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 vacuum unix,e rwtsu. l:* gw),/klh )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 el;)mtt7t0n *:g zl7fblxnz0electromagnetic waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waveqd*uvcj(m f-kh tl)v,((k2nu r:mc s 2s can 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 f-ib)zux7isn n hdbabozec912 e/bgv: s:/f56ield are found to decrease with distance zbg )a6b2 sn9eeziv1:5/ /h-s:inucdb7bx o fas

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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 tral;:g/d3n ;jo wka wk2xtlhp 2bpjn 621veling to the east. At one instant at a given poinn: /;2d3g6 hp jbkljwktp2ol 1n2aw;xt 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 wib4nfzmbs,rn:w4t f dos (6a3w ufh* ))re antenna that is oriented vertically. What should be the orientation of a stratn) fw4sf 4f*(3bz:s)n hr,w6du mbaoight 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 ar3txqz3e/-h wc6nq t:be

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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 jaruuieng5 .6tz t674 ,l- cqsin 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 fro nhevd4dl-73cm

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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 unit time per unit area is th/i .)2gvvoqs jejiov./ q2 svg)

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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 66:.kk qxiwmq2tp c7rcalled 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 ww4 smaxs)i fbu)l2p3j tn ,x33aves in order from longest to shortest w23axnp3f3si) u )4tm sxbw j,lavelength?

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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 w-8.b e 6veyh7wx*;g(octby eoave has a peak value of 2.0 V/m, what is the peak value of the magexeovbyb t y*.goe7w86 (;hc-netic 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 (elbqiw q4 cs0uy)p-2nsr:nbxm b-.*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 radi s)t xghtby-g5 igvc3pt3z 64,ggz6 +go 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 radngf97dk - eat6k+ o/,c w6rpfxio wave signal transmitted at a frequency of 7.2 MHnoe9d / 7xkfg c +-,a66wktfrpz?

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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 t3 u0ze-k;if * *z(lp xza0evsWBRN 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 frequencyg9+0 /bzfmlfx hv w)i-b7a cv8 of 20 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 tk0 v1-u8qhca, qf ekc8md1+llravel 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 -rg62 eqmzgrek9w -kzo93 ds4 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 ;: ah0*mfc 67sb bxtlj0z:nbya local 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 inrt-gtj stf4n: bv6d. 7 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 retur:;w0 v eo f0z-fitwb6xjvp: b;r wx,9in as an echo in 20 ms after transmission. How faofjev fi60:- t;0 ,xw9 wxpbiwvzr;b :r 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 atmosphere2;pxs ko*hv;e1 u/kmn o3o 1ah) at a rate of abo/o hx3 1v eu;k* m;a2nhop1kosut $1350 \; W/m^{2}$. 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 (above2 (exjeuxppw,bs5fv0 3-nkk( the atmosphere) at a rate of about (-vsp xe 5 p 3un,2ke0fjwb(xk$1350 \; W/m^{2}$. 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 di sd-b ghmqigc5j,l a98o: )retjt; -0xstance 2.5 m from a 100-W lte g:9tsq0i)- 8-;cj mjg hxbad rlo5,ight 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 a distance 2.5 m fo.2bz-s6xsp: mq 4l utrom a 100-W ops :zlmts. x6- bq2u4light 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 m5hjf3xj 8+ laqdtq5v+c ygn:9s+wnb ) m in diameter. What is the average (rms) value o5 3qlf8w9 5bd ycjn+n+j:qgxa)stv h+f 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 naygdqkk11i1:q:5:v ez erp /hbrrow beam 2.00 mm in diameter. What is the average (rms) value ok:kg yri v1dh /1pqz:1:ee5qbf 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 across a1sjd s,.s6 y)t b-8f9r1ud6 mp qbpmaf $1.00 \; cm^{2}$ 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, giveng9:le)lug jr4 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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