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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 electro hvz(g c1.hbr2magnetism 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 produced by ad/; wxll+1 yeew8eq(t

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A changing electric fq9;,l 0yat2 tj.yabi m5jqaw)ield 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 travel through a vacuum a6ly h2u )fgsiq9e 84c dwrv.c1t

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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 alli*v9( bbraaa ; 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 4hl x*d97vxvt20dtr tthrough

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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 thevmo d,(b:+a .fjhseu8;8r , djwfbug3 electric and magnetic fields in the radiation field are found to decrease with dijs 8,gwfvb3 u.ar:f,o bhme8ju +d(;dstance 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 the8 oagi5;x- c6vz erpz1 east. At one instant at a given point its 8cg 5a6x vr1;-ozizpe $E$ 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 o3qj6,n1.z nuji j +qtstraight wire antenna that is oriented vertically. What should be the orientation of 16tuon. 3jj+jqqz, ni 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 waves4z9 c:v45+qeq ojgw8zw)fhf k 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 electromagn/)zuig.aq9 x2et2ap jetic 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 h,ilkjw ,o9eh m2yo- 3wavelength 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 electromqpe 8-:gy/q vm+vi. pxagnetic wave transports per unit time per unit area is thegp:y v-.i v m/xeqq+p8

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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 elect )+rysitcu-rk8hmi n(2f r;q a4*w-pwromagnetic 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 electroma emfkk j2(pjaz:48 ic(gnetic waves in order from longest to shortestp(i fmk:a z8ke c4(j2j 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 ofyi:7y,vb0n1e df mnd 9 2.0 V/m, what is the peak valueb09dfid1: , vy7nnm ye 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 freit33gh:) zjy pquency 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*9dczki (hd,knbul r9r,+e1 n-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 radio wave signal transmitted at a frequency of iab- t3 2fcylk+4zxyx6 um0 ,l7.2 MHz?4 fi uz6,ybc3y xm-t+lxalk 20

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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 wavn,c6 ag 0qyr6v/e:d uie 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 frequenct8 w.vk4s ls)sqkfa(7y of 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 trav3u6s h/rheja4- kuxl7el 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 1xmx37-er2xqvg q x92 u.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 locac/84fg *t*r1w:. duqbnjvlr a)d t, dtl 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 distance light travels (hsmxe4x)*mf g-(a n nin 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 indicg mv6m*0vp dz*ates that a transmitted pulse return as an echo in 20 ms after transmission. How far away is the refl6v*m*0gvmdz pecting 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 a rate ol1l/ 8rth4r/)an xszsb-* l mgf aboutrsl slmn -*l1/ zbht r4ax)8/g $1350 \; W/m^{2}$. 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) at a rat:nrw8;yuz q2xe of about z 28;rnywx u:q$1350 \; W/m^{2}$. 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 afatj,kc7 j to1(5v4s c distance 2.5 m from a 100-W lio f1j74k(v5 ,sctjat cght 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.urjk */udn me-i,phry00s; 5f 5 m from a 100-W light br0nri0m;* jeup 5dhys,f-ku/ ulb?

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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 ouhwpt9ua8m27 wv 3caj: t a narrow beam 2.00 mm in diameter. What is the average (rms) value of the electric hmwu 9v 7taa2j 3:cw8pfield?

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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 2un8oq8fu1(zml-kmhcoym w/ anhv5 ;p)3y1m4.00 mm in diameter. What is the average (m5) 3w(hno-nu8y ao v/1z1kmlcufq8p ;ymhm4rms) 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 transpor+t bv9-bnmnxv7uz. 3kted 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 that ab9s z5:yyw5r3fkv;k f7j:f zqyout $1350 \; W/m^{2}$ 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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