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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 for3o ki31x.fti.uel635 iedyj d0zvzm: all electromagnetism 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 pro k:-c)zby 6d5 sqoghnp-pxr39duced 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 willnkhhn *)6e+mj7,1:-e2gcuh or zyf id 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 tx(cpq.+d7u1n-nug 3t lh9qj ahrough 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 electromag ed8te-zbt 9u;9k* j(wdq6im* jy93vyc * ldbpnetic waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves k5svzc g*j*k,w.e,v1tbw ix6 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 an9s f2b+gsqr.y d magnetic fields in the radiation field are found 9 2b syqs.fr+gto 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 traveling to the east. A )lx0nx:p m;ewt one instant at a given poixl0n ) xw;:empnt 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 antesa,*j ekfu x3*nna that is oriented vertically. su3fx*ka, e*jWhat should be the orientation of 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 ardm 0ug 1ew*vw6e

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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 l 8iw/shi*us*7 c3zqb 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 wave0du l0euh y5.elength 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 area iv- ypfb,uyf 1/on:-nqs thenq:b-/uyfpf y o-1 n,v

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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 exertei3j;h bkqljf;3cfe har2d26c 7qov9 :d 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 corre+y6p4 af9 e ruk0*n4 dpylg1*cq/jjfvctly lists electromagnetic waves in order from longest to shortest wavele0lnk 4efjj +*/ 6qucfd4 pp1 r9gy*vayngth?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric fieldyc7g, wl0: uvsp 3g.ly in an EM wave has a peak value of 2.0 V/m, what is the peak value of tg70u v,wlpc sy.3lgy: he 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 sl +6;1zu)j x fs5ph*ri j3mfwwaves 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-M5 xr); j+d,bdltnatn5k* f1l gHz 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 mkt1ftd*g1 0h)le1(0hz w uogradio wave signal transmitted at a frequency of 7.2 Mzhoft0 l 1um(1hkg)*0g1 d wetHz?

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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 in87aucs0z dwp r)vl- gy9s0l(m 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 pst+la5t+ v 6mof 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 travel in 1rk . j8l jms/n/c6f ifv9y3h35d/ydic .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-3w.3vkt 3htse)5lx pq/x)mtslw,(jzjyj/ sght 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 station to travel 20 mpyzfa6v 5xu )u:2,oke iles?

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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 ye+pca 5c/ubsf 3a+ zq +z7t x4,emjdu6sar)?

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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 tra47wbo h-6rqai7mj f2 jbav87rnsmitted pulse return as an echo in 20 ms after2wmj 6-f4j 7 rb8vraa7 i7qhob transmission. 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 pdzuvs2yn+ h q1s: ws) l,q0z+ b8-vwathe atmosphere) at a rate of abousdhq 8:,01 s2+bwwvupq+ vszly-zn )at $1350 \; W/m^{2}$. 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 p; ,*qzw qay/,i13dpw2m atqf the Earth (above the atmosphere) at a rate of about aa3mp/,t q , d ;1qwqyziw*2fp$1350 \; W/m^{2}$. 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 dinvtf9dy u /k66l;iwm 9i9/kanstance 2.5 m from a 100-W lighn n/a6tk 9i6mviy/fd 9wluk9; 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 magled)lo3am51 )t:e vy*,jw,4sjr du f gnetic field at a distance 2.5 m from a 100-W lig1sl3v)ye f,)e*ljda otj g5wm r4 d,u:ht 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 2.7 :- yiw3lymx*( clqvw00 mm in diameter. What is the average (rms) value of the electwi :3(wm* yq 7ylvcxl-ric 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 the aveckob4 1wl xc8e(n8-i- pvq ur2rage (rms) rcbxl8w- vek(c1i8uq2n- po4 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 transported across a flnb0t-( m b3rzi jc+:$1.00 \; cm^{2}$ 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 eu*./ c,ugeke+ +7is2lw gp nmoutput 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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