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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 developed by-(wsi 893yav b +linqp

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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 produ8st3p vj ,eo4mced 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 fit,fgt5xm3r slb ;w0( oeld 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)p/j l)/p*lshaisyy/ 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 electrom k58bng:o p46 i7jvyepagnetic 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 throuprb86fj,avc 9 gh

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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 rg,g:quz )dij,adiation field are found to decrease with distance ,,:d gu gqi)jzas

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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 instar7kcp/rcw/3 knt at a given point ir7ck3pr// w ckts $E$ 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 w:1tyc)v8 *i. wgddinis radiated by a straight wire antenna that is oriented vertically. What should be the orientation .yiw*vct:di 1wngd) 8of 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 avkr 8k4trtd 1,+r tm,yre

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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 electro6ytcfhn4nab(lc 0p:-bc y: ,d q7kim( magnetic 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 wavelengt7uo*c/zn gid6y8nkg,l f))l ph 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 electromai d e*w9rk1s0h hw,p4f6gd5qo gnetic wave transports per unit time per unit area is thewd6ro,fs9i14ehg qp5 *wh k0d

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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 wavq,ju1o -:qmu2g:f)wpg ,dkza z,wd8ce 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 waveml8jvc 1fg+zq1 i;: i7zgnlphsx1, x2s in order from longest to shorg c8,;j1vlz2gx: q1pxs+ ifm7h1lzi ntest 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 hasslxue*39+ ;;tqdlnodfbh: yt vt:)k7 a peak value of 2.0 V/m, what is the peak value of the m;utye *tdsd7v)tx lb;l9ok :h nq+:3fagnetic 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 tik9p5q uq) p*zc mk0x9heir 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 op-r a1pe1js ) d6:gntuf 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 of7tnft p(uy(*-v9 ahu vog vl p.wn-64c a radio wave signal transmitted at a frequency of 7.2 MH-pcn6.t(vglp t-aon*(vywu9 74fuhv z?

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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 q :cf 86u+mj+pss+emithe 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 mibb 1896y2*iq2x oy u eu yyyf3qkv7xh4crowaves?

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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 oqb. -x--ukq7zpgvn khq t03 w:0mf:din 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 light to travel 1.0 m?qtamn od/ez,p p v:82+

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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 2 hk)f7a42bb 0,ax eco ypn6*hg0 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 lighq mzf kbco:bh8wu.7 8s-hk1u*t 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 mm ,o+zy/zby*echo in 20 ms after transmission. How,zmozy/* y mb+ 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 Earthen 17 tp(vtkj2 (above the atmosphere) at a rate of about p( 172teknj tv$1350 \; W/m^{2}$. 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 rate of abotp+:/med 1 f(xm4b-g8lyv2h k vp3w kcut 2tg p +8v flx1pcy bkh3mkwv-4de(m/:$1350 \; W/m^{2}$. 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 fchw 0nr(qgud58/ xw*jrom a 100-W ligq5h/0 d*( 8rncw wgjxuht 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-5ollq *y bt6w the magnetic field at a distance 2.5 m from a 100-W light bulb?6 o 5-*tyblwql

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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 oxj s. lu80h7hpuyrc 24ut a narrow beam 2.00 mm in diameter. What is the average (rms) value of the electric fie sh4r7c28yljh.0uupxld?

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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 xb v1tst yww4/(4i6 k63fidocout a narrow beam 2.00 mm in diameter. What is the average (rms) value of the magnetiowi d6v3ktb1w i46/4(sfctx yc 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 traadvr0 s (42waonsported 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 powerbt l5w7l,3czw output 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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