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习题练习:Physics Unit22: Electromagnetic Waves



 作者: physics   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 electrtcbx. y.*( .rzdo ;tkn0h+kn domagnetism 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 producedr9jw 6y5 sg9ox 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 p)5z(4kbd8oh l-d d hsfield 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 v mfc-i9l); uvm1b,p athrough 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 pru nbgnb+q++4 (m) ezall 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 eux lo48d9fl9can 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 ;t tbk or4g0s)electric and magnetic fields in the radiation field are found to decr s rkt0b;otg)4ease 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 tov6-.2z: ijutpn jx:y lcic9 9b the east. At one instant at a given point z2. v: c-yp9bcl:6itu 9xjji nits $E$ 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 strax.ffwgz+ u- bs-w8lc *ight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenul fg+-bw wz8-fc*.s xna? 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 ao3eb(be:bd.iqzuo6- ( 1ktq 9l / oy goedjt44re

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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 i5gwdra4)q9ar p).segn(m * jis 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 waveled ;w)ei5ba k7 qj.1tgg+pbet8 ngth 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 thex:gpp8ldjp *;l8 pp px;:dj*g

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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 electromag: 4n oq8pu5btxnetic 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 ordl 4iqe:o g8a8, o3st4g8qar *5qooffger from longesfeqga4qo35 l,f gs48t8o:q* r gio8ao t 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 2.0 V/m, what is the peae5hkk2 c;zt,;z(g 1elox ub2 uk value of the ma; ,k lk 12u52oe zchbz;u(gtxegnetic 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 5 k8xa9vvl0nrn 5mc 6vwaves 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 wavelengw1 e vs*x-1 f+r:feila6-atfath of a 92.9-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 signal transmitted at a frequency of 7.qs2 amfnjs.qsnq: 6 )32 MH3jansqsm q.fnq ) s6:2z?

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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 v+6j;p m3 vxzacarrier wave in 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 of 20 mm micdvjz*f5y3 o* urowaves?

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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 )bdgth54yb dr 1i 1ti-db6) e(jc(ycpms?

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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 travel5 upxfr,*l2l -6ro uqb 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 th-dt)hh+dtn3v86m 20q dx o2xcqey-eu;f8ivq e signal 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 light travels in a ye+lu*3;pr:v fmhsy7 cpy1 cl 62rkwxo /ar)?

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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 w fjjpxm+dlc1a,40 e9echo in 20 ms after transmission. How far away is the reflecting obxmc9j ,fl e4+0wdjp1a ject?

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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 t7 xqru+prrw)adn 7 3)+ xmlnyct(/u5the Earth (above the atmosphere) at a rate of abot 7dnt3rmwu+)( lu+n7p)rx /yr5q cxaut $1350 \; W/m^{2}$. 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 ralk,w eohnw:*j,* bk)qte of abouthl:* *jq)o ,nkew, wkb $1350 \; W/m^{2}$. 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 v7u k-h.c j+xl0gnrv 2bkt;(r a distance 2.5 m from a 100-W(l;br-c uvr7g0x vk 2kj.th+n light 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 distance2tr.iu j1md)8qn fec ) 2.5 m from a 100-W lig)dmtjn) ci. ur1e8q 2fht 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 beapb ep.r;-w f8agav2m-(g7ntnf-r v)ym 2.00 mm in diameter. What is the average (rms) val--. fr2)p8(-rbav w7vmg;f ntgpynaeue 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 in diamete y5 v8zhbbwa,m)i/z e3r. What is the average (rms) value of the magnetic fieldhbm i5beyv38za /zw,)?

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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 ;/jbp9irba/-pt9ddf r p wf m*40cd +ra $1.00 \; cm^{2}$ 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 about 2.e nttz9wrh/$1350 \; W/m^{2}$ 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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  • :
  • 总分:35分 及格:21分 时间:不限时
    未答题: 已答题:0 答错题:
    当前第 题,此次习题练习共有 35 道题

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