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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 alg-mh, z:kg;rw ju;v) t 3edc)dl 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 progq5 p-z65j:8ffcqfr bduced 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 /wji 0wwmec9e /nzb37field 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 travs01(t i2 (i*y:s698rbcs:a qzl/fphbhs njpzel 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 electrkbtim7ogt r:5t*d 74 +8uyot vomagnetic waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic wavebt hcr4+r-t* xs can 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 a p0 +(pz;zsli5 sfdfr.c6+wx2-jkmmand magnetic fields in the radiation field are found to decreasms5 fcx6wis( p m+-dlk0.f jr+a2p;zze 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 gi,td9kwnh ;eu14 - 4ermp vssioyq4:p7ven point qtuo7e;p ey 4nh4vmrsp i19: kws4,-dits $E$ 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 byjxl(f. wtc8x+ a straight wire antenna that is oriented verti.cjx8+t x( lwfcally. What should 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 g6umd(nee5a)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, which is not electroma7j x d 76fh1( 9,t/hd de/vcrzfdzqjj:gnetic 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 n 3+:bu9jtvdf 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 per unit time per uxmrb vb1+ *xb(+hg9aqqbj-(r nit area is the(h-+bgj+br rxq *(xbq 9 1avbm

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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 elgzek ;)ao5huk37 pgo +2yy9o rectromagnetic 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 order from l68r h b5rnlzattq8 x;4wq:az 2ongest t2r84 w q abaz6tnr85xth l:z;qo 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 field in an EM wy va/ihtba 6;i.mb cc 1r0d/a8ave has a peak value of 2.0 V/m, what is the peak value of the magnetic field?dymb.r 8;i /t6a1cav 0ha/cbi

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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 +g(h:pjti1lar 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 wave?rwed, 61id7wwhdj q 4kjp/ me9l, 4q-m

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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 frequencykgeaa+8r0l ( m of 7.2 MH+( g0eka8ralmz?

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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 WBR5na h5tp*kpiy o--by 9N 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 20ccv pgpi1g14l(occo:)zgo72 mm 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 m,8f m:;(vue*tgepp0yi i2wv 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 m6 21v*bh jsw0ma-m got?

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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 statio: :wl5eml)m4sozvt mu)l9t h:n 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 disr.x d(ex8 uatdzs8t,2 (7umf ao -qe0gtance 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 m,)hemx(tkm17r fe/ yns after transmissio,mx7ek(yhr)1 nte/fm n. How 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 Earth (above the atmosphere) at ao,g ez,z +zr91xt hxl5 rate of abo1z9x,zoe+rl hzx t 5g,ut $1350 \; W/m^{2}$. 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 atmrae7+ f4kava gr)w9- uosphere) at a rate of abouta4+ r7vugfwa er)a-9 k $1350 \; W/m^{2}$. 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 v48c ve//lnu 9ul7irxamn.k1k alue of the electric field at a distance 2.5 m from a 100-W lig.eu av1 /uc n7rl4/x8inl9mkkht 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 from a 100- tg.n( u if96camagz70W light bulbi 7z6atg(n9cau 0fgm.?

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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 diamr -v la-9uzry5k +h+gketer. What is the average (rms) 9rr u+-z-v la5y+gkkhvalue 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 beamnr9 6h kjb*mo; 2.00 mm in diameter. What is the average (rms) value of the magne *nhmor9b kj6;tic 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 transpogb29 xtbav3:*h cz q )+lsn8zjrted 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 thatg -t*e:e 5hj1fr x1yeu 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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