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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 byfkbv pvg:3;a 5

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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 p*4 vt* gzxi2naroduced 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 wq4um/g cy7oup u 8.k0 jo)t)ffield 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 )ay*d0 x7zfoz08aiw rtfdio, /s su*.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 velocij-o tgq:u*wgh(jv 9/xty 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 through4uom(j1j sv2e:ff6 vw

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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 fhw(y u( y/n ,x:aeap)field are found to decrease with dia,xhae yy (/n)p:w(ufstance 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+p/odbmtk5avfgjr9 6n-8 sg( stant at a given point its- v+58pojd /mf6bnrgt s(kg9a $E$ 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 antenna that is orie)/oz jxu-b(c ry0 95o2 d, xnrguvcgf9nted vertically. What should be the orientation of a straight wire receiving antenna? It should be placed9,0r9vx c2gor-)gf 5jbdyu /co( xun z

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves are(dvfy h)1 rbj8

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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 (6/83 nsc jsnoz. ,exykc,kljetic 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 wavelengthylgo5g3ux y(1jf)y;h 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 unq 9o-qnkix42koqws*: r ju8 b-it area is the:o9jiw bn2xq-- * u8kr koq4sq

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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 electromagnet a6fkh h:6/; h 1,xi2zqbgbcnkic 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 nxu zzgl )g3gw .7t-6ecorrectly lists electromagnetic waves in order from longes-gg63t. )luzwe ng zx7t 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 p 3ls *sgnr6lce uq0/4neak value of 2.0 V/m, what is the peak3sr /0g*n u4 eq6nsllc 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 wavelength of light waves if their frequen jkldyx6 z(k 15x+alb7cy 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)fo 8ep,ortl/ -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 signa iq 9 pr.s;+hsyc2zbm j;+m4hil transmitted at a frequency of 7.2 Mhimb92+.q4c+ j;r h sympz; siHz?

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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;1 en0q*lq) qzck3dan 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 oj5ylfo(s +y3 wf 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 t1 1+)n)z4 mtfj eyrqquravel 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 3a fklh/g;0e1s+ j frp;3cmodm?

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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 s r4t-*bl uhmt2ignal 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 distance light4l(5oid4 egpzwwq x/o* 6,pzx 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 anc, gdr:o, otj- echo in 20 ms after transmission. How far awaog: ,joc dr,t-y 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 S stzez y.c cy3p/f1fu2q0 1ahw,v.9b tun reaches the Earth (above the atmosphere) at a rate of about a 0hc z.,yfb2zwc1y 3p1uev.q s9ftt/$1350 \; W/m^{2}$. 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 ncddumvt-c .33;b xe 9yd i(l0reaches the Earth (above the atmosphere) at a rate of about t0e-.lx( y3bc vcuindd;9 3md$1350 \; W/m^{2}$. 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 wq bjw9cpby gju;*( 77the electric field at a distance 2.5 m from a 100-W ligjwyq7 * (upg9c 7jbbw;ht 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 distu .9yrkpxff6);jh2y iance 2.5 m from a 100-W ligyjufyi6f2 )kp9; hrx. ht 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 out2vgz/ apiex), a narrow beam 2.00 mm in diameter. What is the average (rms) value of th/ ixgv,eap2z)e 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 diamet/h80n igykhnq*n m0,ger. What is the average (rms) value of t n/hyk80*,nmhg 0nqgihe 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 transportxtm3kmcw-:+y g x 2rz.ed 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, 8 8nuu +ttpq(8n d5avzgiven 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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