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习题练习:Physics Unit22: Electromagnetic Waves

 作者: admin   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 were developed3.(xfm dbkjbc *k( a5p.vg * eawm,u:w 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 produced5z( f9hmv) qhy 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 f07az0)stfnn lield 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 ulxs +.u( +0u.gu l2cztr9b( :yeadoatravel 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 eled ukn+moe,d),g-b 4fc9. dkamctromagnetic 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 throuz d32+xk4nvdoc ,v)t xgh

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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 thcuga ) ko7tr-fy3f4 pa5 v,u+je electric and magnetic fields in the radiation field are found to decrease with r a,k o-j v)cg +7y3f4utpu5afdistance 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 in* a z,xc uj+fu97z;mimstant at a given point itm7jc zzm9f xa; u+,iu*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 w gu9x: fwy2 n9t1)hjqjave is radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving a2gyh:9ujxqt )9 fj n1wntenna? 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 a- d5avb,k3cz0u c2n+ 3bqik4yolhmx/re

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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 electromagnetic d 2315 qy:8nnqsv3r(kcmr ih:xx( bpnin nature?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Visible light ranges9wa:seel8 a8g in wavelength 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 transportcq;h-kmf( 8nf xsh /g*s per unit time per unit area is theg* h( -k8s;f/ xfcmnhq

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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 electroma7l-a,r/ry zeot uh o2q.dj *5jgnetic 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 followia8poe 9uu2rs/v(ta b -ng correctly lists electromagnetic waves in order from longe 92sa-bv aptue8ru/o (st 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 in an EM wave has a peak value of 2.0 V/m, what is thejk6o c fk4v,5j peak value of the magk6,45 j cvofkjnetic 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 wavelengthd:r,z7 h.jj ra )ook5d 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 wavelengtfti k+g,ac i +3o*r)jhh of a 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 vs4hci j4y3bbi +,h:l radio wave signal transmitted at a frequency of 7.2 MHic, :4y 3jh+lvbb is4hz?

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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 carg:0l2wcw k2yd(ja; h uy 7mh+brier 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 7.(dznle-mkj 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 tn ujx.y;22yj fravel 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 1.0xbzum ddc n2u:n +b4gh)e)rr*u9 j ib5q;:7ph 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 r +/uz nzs1f*toadio 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 distance light travelnwniq9(5 wm)8 yo2z zb)pk;qvs 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 i8ct :9ytu n9ann 20 ms after transmission. How far away is the refl:tt 98nu9acyn ecting 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 atmospv; wxqh,x :., 7 hqa5;esrv5stlrtdp.here) at a rate of abou .l7r5.:dwrtsexv5s , ;ax q; h,tpqhvt $1350 \; W/m^{2}$. 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) as v*:e/ nb7dzdt a rate of abo b /v:7dzen*sdut $1350 \; W/m^{2}$. 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 ele/ pw kj;/sf8drm(2uxw ctric field at a distance 2.5 m from a 100-W lik u(rdw2fpm/xs w 8;j/ght 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 ofd)xwv (p ae(j 0u8(bri the magnetic field at a distance 2.5 m from a 100-W light bu (u0(x)(dr8viwa bpj elb?

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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 averageesxlf 61hi v(83u0gp f (rms) v3pvsf6 lg0h(x8fe1u ialue 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 beam 2.00 mm in diameter. What is 23o uhvg piv9 ,tyz.k7the average (rms) value of the magne.voiz ,9vk t3ug hp2y7tic 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 trfkqd/xf(ljb+ (yo;qy 59jf4ransported 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;1;ru xst5iq 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
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