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习题练习:Physics Unit22: Electromagnetic Waves

 作者: physics   总分: 35分  得分: _____________

答题人: 游客未登录  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 f64oeft+eh3vgl63c c 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 pro.gy )4lb.e pqjq)n 8ryduced 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 pr7dve.*y h ho e37mw9gwjm+k,j6bt .klrs cq),oduce 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 traveldo:.ls*. ojcy 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 velos(u ca (f1z94:qmmb7rsyswk y0cj 87 hcity 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 a bdoxfe8 6wmc(qm0x5kp8 0h2through

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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;t)dlko2 -o/wp1 te4epybp(mh22 df c and magnetic fields in the radiation field are found t1ptob2;yo-4)(2ct khdwfm p2elde p /o decrease 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 these;kbx; 9:9m/g1e rvzxo9 lge east. At one instant at a given poing 9;zveo ; s1elbg: m/kx9ex9rt 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 sqxewv7.(xubwy m5ec3y6zfow /:a2o - traight wire antenna that is oriented vertic62v. weuy5c:w3/(a7ob z-yqo wxfxm eally. 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 arwr q( 9di/fq46pgbcq5e

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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 electro3ozf g9w wa3:vb9t o(wmagnetic 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 wavelena +:ee6y +fhnsgth 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 transportslriqzs4w-t5 1 guogr/br,-v;.uf/s c per unit time per unit area is the 5ugrou/g1 cvrwf ,s-q-lzib;r/t4.s

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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 a ju2novd4wla6nr b 6/8+nnqd0rea exerted 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 electromag:p8 uotttdn2( 8x 6ypqnetic waves in order from longest to shor:d 8( 2o8tnq yuptxtp6test 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 value epk5v9 z,2 jykqh+kv-of 2.0 V/m, what is the peak-,v92+ vk5je y hkzpkq value 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 wavelengthv,bwg 0 u w0ja/u.dqxd5jld6; 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 a 92.9-MHz rad,,;0 xdb8z+ fet6,yewncdnff io 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 radiv7nfmll4o ;n.o wave signal transmitted at a frequency of 7.2 MHn7v lmfl4 ;o.nz?

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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 st n 2 k; (yw1o2yiz(:gbj:uyzidation 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 ope0n+fx7r/s ewsz+ s zzj3o.8f 20 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 in 1.0 tbko uyve;,,*c)/c ou c+hg )kms?

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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 ns7g 2f-t45 oti1(hotf/jj*eiz gs d0qp,g b2light 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 stxfg0kp fm* 6ueb+ pz+9ation 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 (the9ky *c ri)t:yo 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 transmitted pulse return as an echo in 20,ggb, xyf uqagq3epc(6 t,l 39 ms after tranq3efg,g6cp,qa x,y9 g3 tlbu (smission. 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 x6.xh06lug nll g k3.oEarth (above the atmosphere) at a rate of abou.g k6 l3nuhx0o6llg. xt $1350 \; W/m^{2}$. 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*i . gvh*( ;fjmzsuaj0 atmosphere) at a rate of abou0 gza ;fu*sijh.mj(v*t $1350 \; W/m^{2}$. 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 theef;l;glxm6 x;ly 4;wh:9 l3g mez9lty electric field at a distance 2.5 m from a 100-W mefgw lgt9h;x6xl:;y3m ye;;l zl l49light 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 azn+xmpkn1cz-( 2a ; om from a 100-W l mkp+2cz zx(n;a-oan1 ight 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 mwt; y/zj s7d)om in diameter. What is the average (rms) value of the )oysj7t; / wzdelectric 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 narrowrr2 d7 cgq(ogsf ;yme9k5 2hx- beam 2.00 mm in diameter. What is the average (rms) value of the magneti29kq ggrmroec;dh-27s 5xy( fc 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 tfv0d4h;tk 87lvei;o kransported 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 ofv +gqupxbz)/xj9jc4m t t dp)x;,1,l a the 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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总分:35分 及格:21分 时间:不限时
未答题: 已答题:0 答错题:
当前第 题,此次习题练习共有 35 道题

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