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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 devely ec+3*8mjn:c k eaid0oped 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 vwy 194u1,vova zias4 produced 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 produc gqr sk5fs7eco5ra018e 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 tb2t cjy.7v.rb ravel 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 electromagnetjp-4c+ )9ymezrsx ng9 ic 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 shk2azxi ly*m21)ops o.8rk 0travel 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 magnefxx k,iua cvxf:h7l -m x,7/u:tic fields in the radiation field are found to lxhuufa, k:/-xc :mf7x, xv 7idecrease 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 w o6zom6yygz z9iq71 jji:gyll(l9;6a given point ll ; 9jo:66lizjwzom1q(7y6gzi9 yg yits $E$ 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 that is orijm rk-(*)gz p/fjvn9iented vertically. What should be the orientation of a straight wire receiving antr f(zjpvm/-)j9*g nik enna? 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 ar)jlxxf .-, nun +fhozne6+y0r e

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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 electromagn* ua2el qq3vnj-w8 gk3etic 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 fgf-ld u-p9(r arom

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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 time per uni+hh,,lobujufi n 61) it area is the) j nb o1+,u,i6ilfhhu

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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 electnbc 6a 6an2wj(romagnetic 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 electfnxiw;8gu 6z; rell,2 romagnetic waves in order from longest to shorl u8xgwfr2;, ;e lzin6test 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(m( rdd2z3 58gkvo wuv value of 2.0 V/m, what is the peak value of the magnetic fi ok(g mvdz2w5d u38rv(eld?

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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 ugcn*cyzykvdyi1wj7; i25/ sz;7vy/ of 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 7ea ujjks7ig7.. up3za 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 signal transmitted at a frequency o fykzrq:gnvw 2* -k wz,ee4 2sv0,4kqkf 7.2 MHz? w2v,-zvks4e2fqg 4 q:0n*e ,krkzyk w

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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 the station WBRN 1460tbpty4q2 3(g/v2bq tu?

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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 mja8t1j1a.o sot wg/9lhbp l;/m 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 ms?jw.ax+( m**wt + xz/ kdygmtg4

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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 trav1*0vy+s id ykfel 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 mc;;0hkhi/ n*;ey 6qidj lijt+ cm,zx* iles?

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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 d j:)1koe,z uf/ stcopp;+ x,zoistance 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 mslq-. 7 an3mqfw after transmission. How far away is the reflecting objecqan 37w.fql- mt?

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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 atmosphere) at yrnejot9arj,38c u:-m)msk5 a rate of aboum3 k59 us:-)jr mjen 8at,ryoct $1350 \; W/m^{2}$. 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 atz7 -o; crnh85t2zh *wokya5mp1 cwfr7 mosphere) at a rate of abouc1 w oor87z7- hrf k*acm52wp5ytnh;zt $1350 \; W/m^{2}$. 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 ekwxc(zk+qwn5ev pu*yous 8zf: q -,13lectric field at a distance 2.5 m from a 100-W vzkkx zu( s3q8f5e: wuq+p cn,*1-yowlight 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 distanl n0dazz:vx: 2ce 2.5 m from a 100-W lig za:ld0: nx2zvht 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 /5e:wz t+7nmibjl7ew diameter. What is the average (rms) value of the elec+bzmni/:5 lwe77te wj tric 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 diameter. What is :1ew w)n +oi,yfggois/sv (1h the average (rms) value of the magnetic f(iowine1 /y so:)v+wgf1 ghs,ield?

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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 transportkw:y.peqf ldr:;*c)ded 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 the Sun, given 6k lzs66a nwsx x4v:zo;(b,vathat 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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