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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 gvez2 jmce59 vvb(cfrz, .kl*x0o03 i8v sx n: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 produceo tz jmzp(/;1zd 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 onco:mw x1i*:i 1g ty5will 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 through a vacuumaz5 -)(bi9ef b9hyxutndz,0p 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 elebbntj 812, zkoctromagnetic 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 trav p/3tr3s wrcaif)s:)we9z p/sel 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 and6;f4jwusv2bn magnetic fields in the radiation field are found to decrease with di4jnvb;wu f62 sstance 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,n) co gs67ug7u274ohakp mft is traveling to the east. At one instant at a given point tn h7gf72ous) kamp467c , oguits $E$ 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 radiqs) z5e8 6 m4bo,vqrcnated by a straight wire antenna that is oriented vertically. What should be the orientation of a straigho z 5)nbs,m6 q48evqcrt 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 wave)57 xkel x+a2:nrvpw ys 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 electromagnet 5 wj6*jtqb+. ip:jtaxkas xeh5ed 4lg2a,9 p0ic 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 wavelene +(t h6qx- st4cwkz-tgth 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 u5,: .en j aekua/jqt+ u wepasy+0bdr26 com,;nit time per unit area is the+5:26abc0ej/wde .po u kjtsa ;,m,rqu e+nya

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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 exertedf(1 bm+e bb1ed by an 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 0u scyz3pl xld:-/ h/13 soo5vf5oudjorder from longestdvu 55/o /lodc3ys: zh0-p lsxjf3ou1 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 field fx 1:1 o.ir*ngtb*xc iin an EM wave has a peak value of 2.0 V/m, what is the peak value:x1. nxt 1c* gifbor*i of the 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 of light waves if their frequene, ccls.xobge a1cp(o7z02cnp + w/m- cy 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 ra)xnekm88f hy 6 kc7+gudio 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 radio3(z b;2tk5 ee 0mvypnr (bi1)bneav(b wave signal transmitted at a frequency of 7.2 pe ((b nziy21en( et)a3;v50vbrb bm kMHz?

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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 14iyyv;z0f/bgx 4 ve,r 160?

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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 microwaves?xc*+d0fw4;ehn n*qu9p ekwb3ej-4q c

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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 1.0b-zpzc 6it hr1af.jb-b 0q0c ; 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 takz-s/ 5ejb1cn)wp gdc8uh i2-re 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 vcsywo f7qt 6)+w50vuradio 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 dista 9q2cz(rv6re unce 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 transmitte5*yazzrf h5co6 79ry 5 lv6okwd pulse return as an echo in 20 ms after transmission. How far away is the reflecting objc6yzrrh5z9 6o7 55k yvola* wfect?

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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 (ml9 ,+ y+ *b(dzbjnqtht:ikl atmosphere) at a rate of about l klh bb (qj+ *y9:dnt,itm+(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 at :nntt per*t3+mosphere) at a rate of abott nep3 +nrt*: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 the electric field at a distance 2.5 m from a 107 j /jlntx/srya9xs+9 0-W lightn/xl7s ys9rxt a/ +j9j 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 a9fm om yupjtv1mygfu)pc6z6 +q(- 0k2 100-W ligh mq 6gp6f1 +fyp ckumuz-0jom)9yv2t(t 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. What is the aveuqpqstm6xwp81 4b)osy-u rp44* ; ekk rage (rms) value of the b4uq )y ux seqo*;4kmpw8rpk 4 1-ts6pelectric 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 is043c*d+*ic6 s j nrsvd znyw1;x ker+n diameter. What is the average (+jkind41nvdc x*3cs e0; syw+6 z*srr rms) 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 acroao)7l,6;goyjjv xgk 6 ss 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 that abo++n3u ygbj 3exjn/ h.nut $1350 \; W/m^{2}$ 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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