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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 electromaxyaccgi ;,kmx 3 3ke--gnetism 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 by5o.:lkredo+jc qj:x iop,..w 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 e lostp63 -7cqfield 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 travel iwv/k gq7ntfe9 /u 49bthrough 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 zps) bhx,-v 2lmv;jmysqy ; 9+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 travel throug6mcwh/k0rr+os9 krzukv9pbl; . : p i+trca7/ h

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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 rad:y. tq-ytscazi3 41q8n e ;puziation field are found to decrea iyt3pqnqz:814az c es- ytu;.se 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 tra2pun otx23x- p:zx1n hveling to the east. At one instant at a given poin1 p p-22:unoxxzthn3x t 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 waven7+v zbgl jlf9h5j5q2 is radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight jl5gbnl29v fq5zhj 7+ 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 la 6(hv re9g) 7*rrkwmare

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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 electrq 96*; eq(- l,ob;zeyb3f a( .qxnxjbzzmy3jyomagnetic 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 from .bxv2 ipu o1-yde5nu)

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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 unigurl(,vu fn; dm: n49dt time per unit area is thed lrgd:9f,;u nvu4n (m

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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 :w5m3xvy t2c mis 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-cplm/ ,c78 7t me5bcjgwder) order from longel cg p7r)ed8mmw/jc7-t e5c b,st to 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 fieldm9l 5ku /zhyv5- r.d6skfyy9d in an EM wave has a peak value of 2.0 V/m, what is the peah /r 5dml.y-k6f5 9 ysdv9ukyzk value 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 wavelengtyefc-9e 1 r;btb( e4oa)x:v bkh of light waves if 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 radogmu1. lv0t3+ xp l*roio 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 6hlip)g w 8y2aa frequency of 7.2 2hga)y6ipw l8MHz?

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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 zju ,9hunyg1 knw6 t6(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 microw ac2bd,4k7,lgokte5h aves?

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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 1.ilu8o2vrln5 6g dlh ,,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 trave2cxvp9aia-ct 3 u8,sel 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 station to travrl 7da xwj eo:ltqj+o68uk*t.u- x48 yel 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 distan*nqrixqr,2:7 u/ao vkce 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 transmitpr:a)tns m d(rsm*50 gted pulse return as an echo in 20 ms after transmission r*(t0)dg mans :spm5r. 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 Sutnpmmvym v.251q:hgd9oy g44 n reaches the Earth (above the atmosphere) at a rate of abou vqmyhn9g21.: md 4m4tov5ypg t $1350 \; W/m^{2}$. 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)1 yzsg6l.a) zq* p;fts at a rate of about g.s ;lpsq az)t1z fy6*$1350 \; W/m^{2}$. 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 the3rw5 dfwr3-sstjn ;w85. vxks electric field at a distance 2.5 m from a 100-W lighvsf5 wwjnsrst83.35; -dkrwx t 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 dis8q a:d u0i6 3afzevuf1tance 2.5 m from a 100-W light:avuaid 0u8 qz163e ff 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 mm in diameter. What is td3 arf5l:uwi,he average (rms) value of thr3fa w 5ldi:u,e 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. What is thex8,fwbe4ar . i average (rmwb ir8,e x4.fas) 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 trcm: 02ifwck u.23 hmthw;eb a5ansported 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 9*trr nm(olf hh;p+ x 66bmd-hff+d9fSun, 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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