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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 electromagwnf ,n8q vhp/8netism 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* .jcn w:zp4xw 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 f38z +h z4ojbgeield 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 wavesitmgz8es0n 8doxe6 iv0 4x g*7 travel 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 electromagnetic waa *gyg: *l+baaves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves can trave)a9usft 9 8kyj(u *gjel 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 magnetic fields in the radiation 0st t 39ywfze(38buhzmy4f -e field are found to decrease with distance a t zs3 0fw y9em(f4yetzbhu8-3s

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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 a0oi-w68lxltp given point i 6-lpx8wo0tli ts $E$ 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 antennal t klnms+,v), that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It should be +)tkv mll,,ns placed

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves s y n;cyq*1e-swbi-qy24ym: yare

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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 el697j7(xs sfqkvfx*j tectromagnetic 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 wavelen djvqva*h;oly86)a )pgth 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 unit arcp3z* 6*hc auvea is the 3* hv*cpuz6ca

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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 eleow0dre iwkfb i md:fo;;1la ,428cdm,ctromagnetic 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 electro5lgt1uec 1g2 q (i jiv2hw7ur:magnetic waves in order from longest to s12gq(ici jg7e:lv1ur2 h 5 twuhortest 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 ped*6ga:bh 3aw vak value of 2.0 V/m, what is the peak value of the magnetic fihva d:a3b*6wg 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 oi)9u7zwkxeh * f 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-Mr(rzn f,40zjrHz 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 wavelengvg*4f,fy gox j+79kjqaac5 3zsf 6oaxg 5)+zkth of a radio wave signal transmitted at a frequency of 7.2 MH g+zsjxf a7 agak45f,+fqxy) * jvkg9 cz63oo5z?

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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 cb cca9r)4yd3jr+h +zaarrier 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 2p8/ke3l360uswgys9 (dl e w lfvr(d2c0 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 trgh8e1gj+qr5 t 6 1xfphavel 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 m?c qk)/* *t7uvpqo1wl o

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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 2. - 571bnvn3hbq eoixkefv z+the signal from a local radio 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 distanceh jset -yz2 xei:rit--2go;d: 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 transx .mtc 11x 8v0sr+hopec* yn0gmitted pulse return as an echo in 20 ms after transmission. How far aw cr po cx18nsvyh*e0+0tg.x1may 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 thebq j,z(kf 5i6ip0*da t atmosphere) at a rate of about dft5z pj ai0i(k6q,*b $1350 \; W/m^{2}$. 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 Sunjvh;+lmsrr1o e+o 3+ o reaches the Earth (above the atmosphere) at a rate of abouto+h+3oe+m r ;l1jrso v $1350 \; W/m^{2}$. 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 fielde;o) 0efvp uep+ krg(.ki l58d, 1:i8blkevkr at a distance 2.5 m from a 100-W d.:kg+ 8e1l;evl uii)e0 ebkrpvp(5fo8 r,kklight 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 fdxdn9r bp7q;; gm; qw*ield at a distance 2.5 m from a 100-W light bulbnwqqb ;x*p7d;md9 g; r?

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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 narrdh 80slkxrvxa1/ x*k )ow beam 2.00 mm in diameter. What is the average (rms)hsxrxlkk x01/ vda8 *) value 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. Wha9: cl:a;6m c ceq42onbm ef/jjt is the average (rms) valuec 96 m;n m4l:c b/fca2jjq:eoe 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 trzoy wxgt+n,,:f0k5sql c3i,lansported 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 theaogzm, y++l3su w +jr2 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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