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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 electromagn3v3ic5 s l7(n oxglf,ketism 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 prodoajce2 o, sg:8mb9yjnfo3 8g)uced 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 f+ njitqwezj,v- w -w :non1:c6ield 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 th2ds +:5 nfznxmrough 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 wa+pi q 8sc 3zjcvl646ylz3nj-d +lttd* ves

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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 temmhwfu*gfv55s2 -m 1 k/i7ejhrough

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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 dbz s v8+k9m2gelectric and magnetic fields in the radiation field are found to decreasv8+d2 gms9zbk e 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 fuzra* )n4z3a given point irf4 u*azn)3z ats $E$ 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 wadh . chc*lj*q2ve is radiated by a straight wire antenna that is oriented vertically. What should be the orienth*l2jqd *h.ccation 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 arelb5sphp7 9 1 j0nps*x-wis7zw

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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 inao9 )s7sl,p10e2m ztl t,u kyp 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 wax +i05sv qbzj.velength 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 perw b)9 :iqjzy7z unit time per unit area is the9yz :7 bq)zwji

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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 i2ld,xsx+ /yuip 2s.dps 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 followik.ms;t2n5a4w* dgj w gng correctly lists electromagnetic waves in order from longest to shortest wavelen; d5 n4gwgs2wj tk.ma*gth?

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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 yle*n b6/gx6y wave has a peak value of 2.0 V/m, what is the peak value o gyx6b*6e/ lynf 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 wavelength of light waveec(u-psqe4 w u )zd;,fs 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 axh-9am,q8pv /-/s0s vblbw0t ifb 7bw 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 sign;gnz,kqp jod 03 2/digal transmitted at a frequency of 7.2 Mip0ojgdkqz dg,3n ;2 /Hz?

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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 j* f. yj*ei0ugfor 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 microwf+pqrkt g ;n37u3;etbaves?

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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 1di uv3/.*jt8;2e mwskgts p2i.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 tssl /1rik sj8m 6lwp+.ravel 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 trav:i x1*pnt8ij hel 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 (uq)( gc*u5i( 5jksm l.odd8uhthe 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 pu/cq cn1vhx6 v+lse return as an echo in 20 ms after transmission. How farcx/vc +vn1qh6 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 atm jze 0ufc6q+hb5m b5a)osphere) at a rate of abou+5c6z0mq fjb u5b)ehat $1350 \; W/m^{2}$. 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) at a rki z 7zgxc;z):ate of about;zzk)ci 7g xz: $1350 \; W/m^{2}$. 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 distance 2.5 m from a x-b a6d yujuih5.fh4. 100-W lig jih.u-ay5 4xf uh.b6dht 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 os 4(a3d jpuz1nf the magnetic field at a distance 2.5 m from a 100-W light b u3j1s pz4(ndaulb?

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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 ; xpwf+6 qdkbck7 z3a.a narrow beam 2.00 mm in diameter. What is the average (rms) value of the electric fie;q3kawb 7pxk d+c.6zfld?

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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 narrogntk6w /644qxgjmqq t*k1v s4w beam 2.00 mm in diameter. What is the average (rms) value of the m4 /6wgst6qx*k mgt4q j4kq1nvagnetic 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/g)j.yo7gxef97 rluh tguj- 2 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 tjb.fxf cd9.3 ehe 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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