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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 el9:s5yh0e4i9rrv0a qb7kaqmdectromagnetism 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 jb5//4zd e/c yt.zu0/ayrkmkproduced 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 field wy-+ y5 8vqphzfill 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 puylnu3 02d m* txgr16i7 ;eqka 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 electromagne bc2f tkuise 6::glv;y;7pke2tic 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 throuy) 8dc k+w)xizs9ia0 zgh

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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 fin*uimk sg p,w(-/i,g qelds in the radiation field are ki u*ngg/psw (q-,mi,found 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 ctmx51: wdce/ 4cbll7 is traveling to the east. At one instant at a given point i ew: 5 l4c1tmcbd7lc/xts $E$ 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 straighjl:t9q bgwo r9abu cb2nbtdi2n ::*,;t wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It scti,w*2b:9nj 2;:latrqbobgd b: 9unhould 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 arqa08 lg, mhzrc4, p4upe

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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*si; bhvhzb5rqi-q( 3.h.kj e 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 innd4jb4pg3ncw*1 s4y-vy ;mnom 3b2na 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 transporjg6t0+5mwys vaj z2s1ts per unit time per unit area is themajg1vw +5 s sz2t6y0j

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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 arws2p 49)k djzbea exerted by an electromagnetic 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 electromagnetic waves in ordi 7n- xpdx+1ntnlwy63 c4s9pger from longe64 3gn7snip n9 t pl1dy+xc-xwst 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 )l;m8r4 lrjy9vm 8c;vnoe:cg.0 V/m, what is the peak valu o;9cvmrmv4 8lj;e:lr8 yncg) e 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 h8jblep +twy84a*e* dlight 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 radir awu10l6qqj.bw p, +j772qdd;ulu de o 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 transmit7zp:h2i6 ba suted at a frequency of 7.2 MHua2ib7h 6spz: z?

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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 stat0ii)mx mb(1 ,)y ogbkaion 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 7lpwtrpt l(m w5d(5e;8 kkpt:qq u)p 9microwaves?

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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 1.0 ms?w +mrr*y .pd-p

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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 mjde9a/5c)g r(c9wam; ssa6dx?

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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 station to travel 20 xjbk+/he9 2 tqmiles?

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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 dfw v5ye(xopc*-.wg7b ep6s t1 istance 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 transmitted pulse return as an echo in 20 ms azzf+xpf0 k +6ewjg9 k2fter transmission. k p+w2 zzeg0 +ffx6j9k How far away 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 the at k0h1svj9,rbhmosphere) at a rate of about b9 ,v s0khhr1j$1350 \; W/m^{2}$. 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 qn p4a+vo1tc; (above the atmosphere) at a rate of aboupq; +1t4nacv ot $1350 \; W/m^{2}$. 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 fie ag62+d9 bh3 *umtw.wy3kajxzld at a distance 2.5 m from a 100-W light bulb?uk2 + dmw6x j a.gwaytzb933h*

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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 fi-/h;bt ypjh+mq:1bw.pza uj5 eld at a distance 2.5 m from a 100-W light bulb?p.1j 5zh:yhu j pbm/b;atw-q+

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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 aosiyyvu,i8pw u* ;o8wa8-i + yverage (rms) value of the electric fie8woa y;siyiy8wu +,8iv pu-o *ld?

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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 diame h5mp kzb.l290ueiw.m/tv 1s:m 3fooiter. What is the average (rms) value of the magnetic fielizto mk9 /0elp5 obhvm3. 2umi1 :w.sfd?

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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 transportw;g yhi90+ y)g)nao cv8:vi op 5w2qiked 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 thul;a ye3 33daje 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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