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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 (jphq.+:-e50wu ntel s 7toka 3n+yxn 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 produchhf r(8phzk :oa,u,y )ed 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 fie3 0x nyvh(hcswb)0-neq+ y jv4f*iob,ld 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 throughr (p-pfrcxmd h.iy(8(b +kk1 x-oi g6a m4r,ds 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 electroma+yzl*r): h edo uuukmnvp3 ;:yd/5-vq gnetic waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves cu-fzzd rgv 3)6*q/pb3jiz1dian 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 and magnetic fields in the radiation fiel+9jk :jmx1jrmw,jb 7da(eq (xd are found to decrease with distane9a1bqmd jrw jj:x (k,+7m( jxce 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 66 1pblla crsz*)y*y vgiven point yz)pc**bsar1 v l6l6y 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 antenna thatqre q .7hc.rag-1/h bi is oriented vertically. What shoul /7ec1h. -qbgirrq.ah d 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/u+qo/f1 v n1ogvc 8cl are

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, wh3tdm0z4.)qdo c ,n fccu 7bawtg +5xk:ich is not electromagnetic 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 froser, .6d4 kozrp89o eem

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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 )8w3v6hglvp y)s vl)i time per unit area is the )wyv h)gpsli3l8 )vv6

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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 wavslv3u9;)pku 4+emi cb e 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 correck-k7p ..,ghji z0nmrmtly lists electromagnetic waves in order from longest to j .7z gprn 0,khmi.k-mshortest 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 int i7lk)c7:fru an EM wave has a peak value of 2.0 V/m, what is the peak value of the m7 f irlktuc7):agnetic 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 thei rmxm 26+vqg 8wq(o6cmr 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 radio w.pf(vzy5gp g1 ave?

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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 radi-siu-q9 ,3pcck)mob2bd ,p wfo wave signal transmitted at a frequency of 7.2 MHb-ipp3 -fk bu),smco w,cd9q 2z?

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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 *h r(6kw/xws)9qzt spw 4hl-,n;a uap 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 microwavet)y2czh rqcg1ub(e1/( ohk: gs?

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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 trah*-6j:/p v1fmx lwhl rvel in 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? 7p6n6ki; 7d2sa-xkvouioi*4 zwzy 1y

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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 a2 9 bsw)s6v5rszwrrk4 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 (the 8) u pd4pqx*uwqrq,qd7iu3 ;hdistance 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 pe 81apc4(dmamk /k:0 1gyrsog)4yi jculse return as an echo in 20 ms after transmission. How far away is the reflecting ob /sk8c(dje0yo4a 1 pg:irmg1ac 4mk y)ject?

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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 c fct/i -h/+;w ksr)vt*w x2fnthe Earth (above the atmosphere) at a rate of abof+t;vi2wf c/*k/wxs- rhc )tnut $1350 \; W/m^{2}$. 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 atmhxfo-g 6gw-pes5 z)z, osphere) at a rate of abohzs6x5 zofew, pg-g)-ut $1350 \; W/m^{2}$. 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 thv)jhy osn7e1mm9q 9u.e electric field at a distance 2.5 m from a 100-W light buh1ym n7mes q9jv.9o)u lb?

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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 distance t zfb/8jl60kfy2+q my 2.5 m from a 100-W light bulb?t0 zybfq6+lk8fj2 my /

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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. y ynhp6xbx.(4tm*t3d What is the average.ht 4xm6 tpd(nyyb 3x* (rms) value of the 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 diamet2n bb+i6e9 *pcdeqq f)er. What is the average (rms) value of the magnecf9+q)2eb eqip* b 6ndtic 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 acry g7nc:x((0ta k qoy*f7nvq :yoss 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 e1 h1/dt(uxsc 1qu2hoh+ts1d 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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