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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 a)- bxuv:41aodfe)m mf ll 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 produced by tuv 3x+ :w v9ih o5oj cu:,tpw;ha.;kia

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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 produce 61xaj7z er9tt 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 fzwkq .kc8)vi/f6h8 rg;o,qb fwx(m(travel 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 velocityt89e2 5t e-nd5espcfjdn 9,ym of all electromagnetic 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 throfvy*seq* l-y8 ugh

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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 mwzfs3 l 6;alz3a) c )a);grrhcagnetic fields in the radiation field are found to decrease with dilaf ra) 3r 3 z;z))s6ccah;lgwstance 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. Atfz/t6us de/ +8o(sim p one instant at a given point itedot +us8(m/pi6zf/s s $E$ 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 wit-9mmh3jk (bldp9*rxrs 668 6dxwcw bre antenna that is oriented vertically. What shouldhbds6pwxr9m(kcmt 6 8 3j-xl*r 6 bw9d 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 12y h+agk (b2a9 8zqkvalbp8jare

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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 nof jut ul31ee 9l (q:4vtbd85abt 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 wavenxu) r1 jfy4d0length 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 electr33/7 thtfjoikm)p2uk omagnetic wave transports per unit time per unit area is thef2ki3ph u j3 ot/km)t7

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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 aa ycs8uy 9vvm6,qnan.1ccp ,9n 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 correctly lists electromagnetic waves in a2t/-3 mnl dororder from longestolm23t n /rda- 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 fiel f7kyf8 i9,3t2*bgtr n) *f6ui eryigyd in an EM wave has a peak value of 2.0 V/m, what is the peak value of the f)6e3y *g,ubt i7g iy*it8krfnrfy29 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 o1ovqu i3xb9 ty h4r46( 2s tmlsy)kh4sf light waves 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-MHto6z66u kw0-i7f cisnz 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 signal transmit*ryf;2n;/)0n .ev-wl dniirn gaxp+ fted at a frequency of 7.2 +irlnp vexnn )/f; ; fg*w0a2y -d.nirMHz?

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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 c9uq:.xu (i 9zhr65-,iwntsj ;zyaw nlarrier 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 twaz/wl4r g7n2. 7qwy 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 1.0 m1c3( l qzvm+a:tlge8w s?

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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 d;p0aqdn u ,vqec0x) +light 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 miles?6cr,c 0 mxq/gl

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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 (;nbk.jphww1 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 transmit9t)8f vv (no43nl 3ll4hqfzsx. lwcg4ted pulse return as an echo in 20 ms after transmission. How far away is the reflecting object9vhw ollcszv34tn48l3fx4l)( .ngq f?

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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 reachbh/os+d,*z x7gxeve 7+ffog(es the Earth (above the atmosphere) at a rate of abouthd ,gf(vfs7*7oxe eg+oxb/ +z $1350 \; W/m^{2}$. 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 o, v evl).n2 5snd,i;i3nwwdqnd6,k gdf abou,kwd., dnn 5 wn3qdei,2d;visv)g6lnt $1350 \; W/m^{2}$. 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 /knc+h2- ur .v 2hl4zqj7pjgm from a 100-W jvg/hu.lc42jph-+27mk qrz n light 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 field at a distance 2.5 m fr3hjlsfs9z-vc8 ud d24 om a 100-W livj uhc92s8 z43 ds-lfdght 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 2.00 mm in diameter. Wha 7 vnv6+)niigz4ev5i dt is the average (rms) value of the vv54egnd n7 v6i) i+zielectric 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 2.0-jptr9 tfnhb qe2:uyrn* 4,b-0 mm in diameter. What is the average (rm9f-:b 4*qt2j- br ptyn,uenrhs) 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 acrosstf hzs+*5ynh7+m07 l9l s7c bnoqk t:z 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, given*-i7e08le8uef 4 r, ikobdxwk-b: bix 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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