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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 5zac3w xjhz9r 5ne; j3/tuzd 83 uy4teelectromagnetism 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 p6gay:,rg(js9hdccwi7 n:e 8fp-j v+ t roduced 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 field4vpd (3)(xq quuje j*vmk t-.b 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 thd l-9j1kn;, l.c r/(cafxk6w ih ci5csrough 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 l3opn 3bzdlkcmp4 ui57m5j.b3r b:n/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 (:yg)y -w sldvthrough

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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 thbon-2 lq6 k)oue electric and magnetic fields in the radiation field are ok) 6-q2n bluofound 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 inpmwpgj2 pwj:vaa/+8 5 stant at a given poin/m2 8aa g jwjw+pvp5p: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 radiated by a straight wire antenna that is oyla sh+nh+72a+(ymh briented vertically. ++hmlybas y +(72hnah What should be the orientation 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 waves wlxkc p*nym*-g+i7v -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 elec 0:33o0i vrnlr4:m j tq2lwpostromagnetic 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 wavelengthaqljt6pav *)zk +v q1qw78a8f 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 area is, ftc31sqaog6 oaopw fg; s;+/ theo/ fp g scgs;w a;to16oqfa,3+

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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 btw4f s4(ms:pw y 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 electromaylzo 8w,w(3b+pccd6 u6 w;lz4wietc 2gnetic waves in order from longest to shortest wazcd2,6l pcco;wu z3 b(w6wl84we it+ yvelength?

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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 2.0 V/m, wham ld29* i 8b8m9kvtufet is the peak value o9i*t2edb 9mlu8fv8m kf 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 frequency7o4pgq4ipa ,q 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 wave)u 7woh2vpps04c bpu1 ?

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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 transmittxuzl1) :qjy7y ed at a frequency of 7.2 yjq: 1ly7)xzu MHz?

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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 station rttgcpoy 65ym((- 1, f9)p8ywglfog hWBRN 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 microwavesgfbg5 30yze .q(mkn j5?

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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 inw 1u ld mdsz*/5f8ocs 9q9a cdru/6ae5 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 q/ fnmrg/gn3e2pt,r 0?

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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 /k8vb(yaqn h5n3ju,d20 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 in6*(j 7b3qjc igx*do pq2:rei v 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 mr0 */q+hc iuoifbi .g2;f;l sns after transmission. Howqri2c nof *;;u h.l+sfg0i bi/ 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 t z kdf-+i 9lt3mn0, eas3vy)tqhe Earth (above the atmosphere) at a rate of about-93 asq0ef 3d)+ntvlz y,iktm $1350 \; W/m^{2}$. 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 rate ofngv 12r1:jbt*h 5lh yj about1b*2n vjh5l1j g yt:rh $1350 \; W/m^{2}$. 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 distanbvc8xb2- b fo*ce 2.5 m from a 100-W lighbc*8bob-fx2v t 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 o fw;*w x5v: -ymh-0nbof acd)kf the magnetic field at a distance 2.5 m from a 100-W lig5fvo-x-:0nwhycmfw akd*; )b 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 out a narrow beam 2.00 mm in dia8;3 73nyys0f3qru a8 drvdmdjmeter. What is the average (rms) value of the electric rfynr m vdq3j8 d0ds 3y;87au3field?

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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.jrg28(o 5i)hdq(b lq:/otu md What is the average (rms) value of the magnetic field homibqrl/(t5) d gu82o(:jqd ?

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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 tragsc4u08qo- ck nn0s b7nsported 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 aboh zj9i4(t. 4gd mkprs2ut $1350 \; W/m^{2}$ 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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