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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 electromagnet4r) ; sehqm-*bajlsk +ism 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 oj0c6a: p8u dsa

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A changing electric fiels14jhe 9n3 lfhd 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 ukh 1sq hr*c(.3 yaar9di,c9dvacuum 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 alzk q;wdhyz7e v4 27u.bl 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 tra9j) gp5o)xmcrvel 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 radiation2cmu4dst. s3y field are y stm32suc.d4found to 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 the east. At one instant at a given p iijkzvlgw(,7a38k w/oinjkii 3 ,7g lwzwv8a(k/t 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 rc 8ce me;.,yg/-b 3 palqxeh6d+1ff rqadiated by a straight wire antenna that is oriented vertically. What should be the orientati mfpcd rx.+6/h-g b1ea;qy,8 3feclqeon 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 wavefp3vcbmtsnt:1+ 0 c ,5;n yh*zt9zjtcs 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 j-5 hji31f. jqqv 5v7io dj pu7fvr,z+not electromagnetic 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 wavelength fro t7msh(i7exm;m

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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 transport4p9 9oaf+ tvvbs per unit time per unit area is thet+vfvp 9o9 ba4

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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 electromagnetic waq*f9 1ug m;gosve 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 electromagnetitv:p3lv 3d/ v, ,dex; xdvk +vbg1 cex6zj2n8vc waves in order from longest to shortest waveleng6,gvd 1 d+;tlv x3:nz2jve,xk vx8e3bvd/cvp th?

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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 pesvd*hdg)wdgv 5 xj,0-* qqtm.ak value of 2.0 V/m, what is the peak vaq0,w-*mxjsgd tqd)vh . v*5gdlue 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 lm)qlriv82i+6cg t8u(j xf( 0qx7mp( dcu pmy:ight 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 radio wae7s(t. fq np1hrb1 z/kve?

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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 rads 0 z9ruk9bhf*io wave signal transmitted at a frequency of 7.2 MH9skrz ufhb0*9z?

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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 statih/bdso / w2je/on 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 20 mm f4oq .xtjy:2 dsks)fy jo7)m; 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 1.0e,e h2n26 rkjo,q qll: 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 travx(6ca4 zpvq .jt.yx m,el 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 staow/ g;chn9fip2n d hp8j9rpds)pt- 81tion 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 in a yearrw1 g+k5re. ia e:q3st)?

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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 r2tdyv . .v)dee*fzjk1vc( 8ngeturn as an echo in 20 ms after transmission. How far away is the reflectingg1.ndzcvef2.v* )je vk 8yd(t 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 of,qis,*c;kf(v:)av fy cvke2 ht k)e(z about :)kq k,( fc,ivthe)*sk c ;(y v2zveaf$1350 \; W/m^{2}$. 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 rpl2g3cs(*qop ate of about gc3qs2po p(*l $1350 \; W/m^{2}$. 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 a distance 2.5 m from,7uxmg, krwvk i :;;rs a 100-W light x v,mu7r ;kg:wik,r;sbulb?

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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 fieldcc,5l+-ip qbg at a distance 2.5 m from a 100-W lighticg+qc5l - ,bp 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 mm i)w8pa(wh i hv*n diameter. What is the average (rms) value of the electric fieva)wwih8p ( *hld?

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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 isqkp6 5. 4u-, 0ha)tjdizgkz fq the average (rms) valu6 5k0 )4fd,g qqzhz-ki.ap jute 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 transported across 47s/)5rj/,vw)qd-hgr:r idz i lko qg 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 powej 8o, xgbu35hjr output of 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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