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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 were develo:k- x:xv6q5ov:2/;yepyy gs-qlirfa aj e04uped 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 isb0 on4elj(io ( produced 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 field will produce a (t2 dckn:k nz6;b6aqb

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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 th2w1 mtidsr6vc4cg( ryoi03/prough 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 e .8y cy)wa7bjo :fr6filectromagnetic 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 u wz;5/ekfj yeaog p:*(*xc)utravel 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 f.h) 5e*c7398+cranzeknzp4v jz2om8f eqob fields in the radiation field are found to decrease with dista2e r89 kc7 zbfa*cj+qfoozez nmv84p).5 3nhence 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 xri rt 1, vf9hy-.v,tqthe east. At one instant at a given poirxh.9q,vi1ttv, y fr-nt 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 on7kv /l6+r p0kc9kuzn;2r edtriented vertically. What should be the orientation of a straight wire receiving antenna? It sn9lpcdvkz0+t6e7 r 2r; u n/kkhould 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 ao9a.ny9gmg5v rb6,j (s3hygl re

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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) bjsox./y0 wpcc s:u/ 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 waveled ;gbju 0(y)iangth 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 unit time per unit ar e*bhrv2aw 7z.ea is theewr2ab.vz *7 h

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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 ar/7 xyycfj/g f9orm0.wea exerted by an 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 v)p c+1.khhqb u k 2 pu;30lub.9m,jtqxs8kplfrom longest to3qh hv,c).k mjt k.p 8l91b;20 kpu+bsxqupul shortest 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 value of 2.0 V/m, what is the*axldc+ *:b/hvhgg)7mm m r: z peak value of thhg*b:mc davrm )m/ 7+lhg :z*xe 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 frequenz cj3i/vxh7a m jbnc)e 3wz2kg2ih.9 *cy 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 waveleng yrmc1.k+c *qhvvf.6gth 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 radio wave signal transmitted a:i02;x y, w*lrp uapynt a frequency of 7.2 MHz:2;li,w*np pry uyxa0 ?

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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 jh/e,tvegfn sl3 +rqms9. 2kg)5xb rl 2ccn1(the carrier 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 microwaves?fjl.rqletyn 4: i9hx;5 ugul/(n;y ,l

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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 inb xses0x/tdf1m kl)7z/. -wyg 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 li.8nyodg *po)q x 2/kbqght 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 statioqtw)h 5k r /8td1yzd4fn 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 travblfeix((v. lc.b5svm ,+ 1dghk2m6a f els 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 (tkdmtgw+qn,q 5 /u-t4gy 24gkfqaeb e5b v-.in 20 ms after td,u bt5 +/q nya4m(5qkt-f4ge.e -bg g2k vtwqransmission. 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 atmmvad/ ( 7ra njh2rt9l(hi2 ga1osphere) at a rate of aboud/ nhrjrtm l91vai2h( 27 (agat $1350 \; W/m^{2}$. 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 atmosph nf9hn6; k7vqyere) at a rate of abouthkn n;fy 7qv96 $1350 \; W/m^{2}$. 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 elwkoz l ;szb)+o.6yxzl k1ck3 :ectric field at a distance 2.5 m from a 100-W light bulb?31 zl:w+bx;z6l o kscy.zokk )

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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 frs;/ ,+md6*i wztxcwxl om a 100-W light bulb /6,s+zdtx ;wli* mcxw?

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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. What is the avera 79rffsrci960ri) gw ,jff5 xcge (rms) value of thi9f,r cfrs)j6fc0w x r7 9gi5fe 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. Wh-e);plvb8)t fjvlhy 4 c l0nl/at is the average (rms) value of the magneticl-/)ejc ;tl b8) lph fvl4y0nv 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 t zv1f0a el q1+zta pr5*s-b4pfransported 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 oe8dy( lb8n 8iiutput 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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