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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 devel g 6tg*ry y19 w6w,vn0+iecc 3c1trwknoped 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 prodm (0 x/ sde)k9zl:gug6 oxcs/xuced 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 will hj 9h3(vk1facuf 6 hg: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 throdb+lrekv sx;;d*;a i4ugh 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 of all electromagnetic z2sg 0 i cqwt94+*ltuywaves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves can( +t 9fjlta7vh+s,q)rx8mhk w travel 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 magne2s nr5rry q/b-6or q/stic fields in the radiation field are found to decr /roqs2rr 6nb/qry s-5ease 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 e3o;u bkl :jak r4/+/gi5s f-r a:yfnlone instant at a given point /soekj5; :4 fgrilf lb/a-3nr:uya+kits $E$ 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 stra .:pa f)a f8l w429st,cevonqz*vjfw2ight wire antenna that is oriented vertically. What should be the orientation of a straight wis8c)zf nw,o*a.fvf ewl2a94vpq:j2 t re 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 areyn- /v403y( vti j8omuq/ngep

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, whicht:dzwg:l5 w-p is 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 fromaefu :wmzu8xc/4v7 ,j6 wi2 /ylkn* hm

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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 r4//zmxrhu z0wa t2t )per unit time per unit area is ther xr a2ut/t0z4 /)hwmz

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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 electrox 0( uv(f0iwicmagnetic 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 inw2n/wpt8v qo 1 order from longest to shortest wavelength?1 w8v/2pt wqon

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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 an3zwijxx,8xx(g 2ykx,o0d sv+ EM wave has a peak value of 2.0 V/m, what is the peak value of the mag,sv yj3k +oi8,wgx xd0xxzx2(netic 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 frequxbsi:h x6b ah::+ay6odx2/ phency 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 pc:i0 /lzl-yuj+z-mo 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 transm k8 zy(u*czk:bo e,i313woi32tcp) n qs bnh(zitted at a frequency of 7.2 *8hu3ozq ,bcon(y3ip2 tiwn 3z)kck:(zb s1 eMHz?

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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 WBRN 1460?nju* y 8wd .(o7lwt,2 q0rphgb

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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 mmyxv8z oma o0qu*8t* e2 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 yuds;uj.*xj2;s,bs d 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 1d un a-fa03vx1.0 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 statij -7v*eohtpmg)xab- g 02q q3xon 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 distanc )t1s:wwe0xr,t: ww8 w jqhk7de 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 re4lmxynybpcclg1b g bv0p4j)5/) i7e4p0zpd 2 turn as an echo in 20 ms after transmission. How far away is the reflectingv b) 2 pcepb 14dpglng/m74z0b yxil )0jy5p4c 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 Suuw1q +gh- g+ ra6hheg8n reaches the Earth (above the atmosphere) at a rate of about ++8 g h1u haqw-e6ghgr$1350 \; W/m^{2}$. 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 qe0/i: hu3r(z4q ekhoatmosphere) at a rate of abouthq(e3/q: kuoh0e rz4 i $1350 \; W/m^{2}$. 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 r 2)rle*5nyvvn:nvp7 a 100-W li lvp:*rvv)n5 ny27e nrght 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 magnep,tpwan6:0 ts m yq74itic field at a distance 2.5 m from a 100-W ligh s7y,q0i4t w :m6aptpnt 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 diameter. What is the avok+sct3 +0ny kerage (rmc s03oyk+k+nts) value of the 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 nk po3 h02xl-.1rhkhkin diameter. What is the average (rms)ponx2hhrkkk l1 - 03h. 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 tranmo b f1,+1h;odo8zhlvbq4 r6nsported 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 o( kdf2dvzu(,)tc ;jidutput 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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