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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 ele-x b7cqjjp8qc8l:6w8y ;grzkctromagnetism 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 9q uf0icyp37lb+ opq0a

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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 40pt*r abw tnlq,6t r;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 throughp4( v.vjskg t)w y: ojvca5zq-f+5* un 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 wavesn2 bwgmflh+m+v0u jux7: r1qb ;myu61

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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 throupgz 7us6a.u 6q n/su8vojok34 gh

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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 raj7i7 (r.bkyey 1 jhh.ndiation field are found to decrease wibyh1ijj7.7 (r. ekh ynth 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. 9j. zrsk(bxu; At one instant at a given pointjruxkbz9s . ;( 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 orient3zatlfk0y 0iu9mo y ,(ed verticall0auil zo0y9m ( k,3ytfy. 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 wavesfdaidvr 7 0:-w7fksg)d )zcm 7 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 electromagnetic in nature( rnmnosc.gneh3/x7g 1 g52eu?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Visible light ranges in9b dr-k i 93c8zc.bwgb 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 transpor;1jeb 3us,bxjt dvue )lv5odsz 3 61;bts per unit time per unit area is thet5 u3beo;1 lube j1)bvzdd;sv36,xsj

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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 electromg ,asj,htlxbxi7 y99:agnetic 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 ord,esip3j9xu pw*93h( a cwudvr ( wg*w7er from longest tour 99eug(c(wpi *hd w* xp3a7swwv ,j3 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 hu1l8yq h:;a nsw6j 8)zrkqs0o as a peak value of 2.0 V/m, what is the peak value of tu ow1yq8 )kslz0 8: j6ahnsrq;he 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 lightf+ 5zf y:m2e4nlfv7nn 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 w44e2kba- j+9gwddq hfave?

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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 sphllu:(i2out41 y ntx ;t*vv4 ignal transmitted at a frequency of 7.2 ;(py4ti1l 4nth xu vu2tvl:* oMHz?

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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 n2 oazw 4bn vs9qggwt9i8 +xw qk6/2q+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 m+k of-tp kq4:am 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 te/iat4 +n7t xwvb 06tvravel in 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 li)+ hs8w4uos1xegjqa1 5r6bgdght to travel 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 ratr05gibh)sk)2 lc( a edio 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 distancqhh: +n/t6v.f9 q2sd.cqwpn.yd: xc oe 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 indic5* sehi24wtxobe.e e;ates that a transmitted pulse return as an echo in 20 ms after transmission. How far away i;x.ew 5 e t2es4*hebois 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 atmosphere) at a rate of ah 0d+avv+hz jne4j8+bbovb8dvh+j+ naje4+z 0 hut $1350 \; W/m^{2}$. 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 them2k0wz;lfj- 0fif ( jj atmosphere) at a rate of about j jjw;f0 f(mzki-20lf $1350 \; W/m^{2}$. 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 gr oalqf: ,2e gwvf l85x9s)qp/t-k7c.5 m from a 100-W lig/fp7f t-8l5x asoq evglwg 2r9q:,kc) ht 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 v v0 6e-tm dc:*-x/t f8+ooaahhesgzs(u*0x vdalue of the magnetic field at a distance 2.5 m from a 100-W lightohco*ghe*t:tz+6sm- x vfvd a0a x-8(eus0/ d 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 a pum)5 x)xk/wcverage)mxk5xwcp )/u (rms) 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 r9 u5e dqa/ ejs+y3d6omm in diameter. What is the average (rms) value of th 5o9jerdds +u/3ea6qye 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 transported7es(.qvfqjf . 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 a6(tjlcs s*ag ms,x4/.i4h8ly7y wbepower 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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