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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 electromagnetism8d h4qqr-ycg-r95u e m 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 p;gbt- jpbybuaz;4 n* 8roduced 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 pro34 7l sl whhv8e8hpyl)+-ojo +c n0jwgduce 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 tr*emudv2j+bi3 r(0(tg 5f o/1io asqw havel 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 all electro7 fk zr 7/c+cpfkcjt-:magnetic 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 trave7gcbsdx ;wf4w f,plzn.vb n7q, ;r,/dl 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 radiat2pk) 8.qbeysc ion field are found to decreaq)e .ypb k28scse 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. At one instant at a given z-9 m3(jd sbqzofv)6kmmv( d 0point (dsv m(k9- mdz0zvbo63qf) jm 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 radj ::b dgi)3l tzavg6/wiated by a straight wire antenna that is oriented vertically.i/3 lgv)j:tb da:w zg6 What 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 arqt tdjhd+4 )p-;gz i/ze

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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 electromrl1sxff 9xe,,r/,dkw agnetic 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 wavel:ei9a -rqaqem2cz i/2ength 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 0jgqklm1 hs*rj u89c.unit time per unit area is the8*m uhksj19qrjlcg. 0

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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 w p;4ootw7i9gk ave 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 corr*iv llt2l9y zs3f;n n:ectly lists electromagnetic waves in order from longes9it;yf l l2 vzn*l:n3st 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 field in an EM wave has a peak value of 2.0 V/m, what is the psm;d-w:-anp gn qec)s*e u5;k- j4xyi eak value of the )n-;ge yi m; q-pnsjucdk4-5: xsw*ea 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 frequency is 2 ; qm9:ic+zucp-rony $5.0 \times 10^{14} \; Hz$?

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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 vc :p(8r -uu;;ytfr mtradio 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 a fri4m+wl4if7 rm equency of 7.2 MHz44mfm rli7w +i?

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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 th1+ccp xguk bpij ,(247g/hzare 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 .uxbv4r 0i-pb)c6ey-n)bps cof 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 1.0i3vz,e bd,urxg z(j:t6us2+u 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)b+.hek tzkj ,3ms .tv.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 there-,u9e 5l:jnne y5)u05mnzcwp+yv l signal from a 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 (t birj6d l9 ygw 7nvy7*.o82jyshe distance 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 transmitted pulse return as an echo in 20 t/s:g2o9 fhqyms after transmission. How far away is the f 9g2:ho tqsy/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 arsj37 )o+xtncw/1yu ( be l+ae4rzq.ctmosphere) at a rate of abouar1)3ou.rtce4j+/q(sbx+ zw7 clny et $1350 \; W/m^{2}$. 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 x.t fn9*ao4hb atmosphere) at a rate of abouxfo.9hab4*t n t $1350 \; W/m^{2}$. 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 electkfym yn2a- n(d(r45kgric field at a distance 2.5 m from a 100-W light nn(a dgrm5 -k4y(2fky 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 u--yu b0o5vxxfield at a distance 2.5 m from a 100-W ligub5xy vu -x0o-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 beami)t8ll csb- oixis1* g-a+pof062o xm 2.00 mm in diameter. What is the average (rms) value of the electric fiello8c- pg6ifsm si)+ oat 2bx0oil 1-x*d?

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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. Whfjh q6613l;t gs0pkn iat is the average (lt6hj1spkf6 iqg3 n;0 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 transported acrossc( nauapddl z mjt/9,qsg2s+6 xn 6s;+ 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,4 s/ m6wsp5rcu 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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