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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 devoego*9mg t+ym xolx68r 5+hy2 eloped 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 ise0cocan dg(9+)6 s5 fwuc p9cl produced 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 pron **)ay;(b6weh tv wubduce 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 a v 7aur9dvazbwm6z +0/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 elreb;c5kec r y3 ),m)vit)i6 vlectromagnetic 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 tr otdhuo50g (q9.uh6oj avel 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 magnetic fields in tti)u l9bh8l/hlvs *4 mhe radiation field are found to decrease with distance asliv t*mh8/4ulh9lb)s

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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 travelin-q oi/i*lx3bq9,a */p dyi)z 8 2z :uemoyatfbg to the east. At one instant at a given point itsy :afi/ i9ox/83**z o zmediyl)p-qbtbq ua 2, $E$ 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 radiat/tr+de0 ica/ d-iv)h*p,fd ah ed by a straight wire antenna that is oriented vertically. What should be the orientation of ae/ d d vaph,i-c+/i*fad) rh0t 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 arectm 2a s0l*e;w1zog4z 2a( dn;zb(qcc

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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 no32 wyt.rzxyykzf3 lp73w s+1v t 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 wave zwb/ gyg6j3o wlbsvi;ce.- 22length 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 electrommsdba9wal qoq9:;4rgde*sp a+g /7 j7agnetic wave transports per unit time per unit area is thedq;ql w ap +9o7gr7daas*9b sm4:eg/j

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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 .u3) i8 eex(ql+ xaygk9t,fjmby 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 followin3y )k7e m u7fe+yemj,zg correctly lists electromagnetic waves in order from longest to shortest wavelene efe+7)37y m,k uymjzgth?

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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 th5oi1r*0o fu( bgef 5tue peak value of the magnetice0* o 5ri1ftfoubg5u ( 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 wavelengk07bsnkaep)g 09we, dth of light 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 wave? etqh:*) bjhfn)/o8uu

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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 freque(wseo 3cs +bxig,58hgl5q9 4 shr,tofncy of 7.2 MHzhg + 8o3(54tw9r5h, ,o siesqxslbcgf ?

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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 thwoo sm9k 5 z3k1ffxn/.:vps) de carrier 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 2;b 7oz+(+sth)uiphi g 0 mm 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 traql41 kvqy74bx +koxt1vel 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 ligxlrqd)p 768: qd :cqtkht 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 radio station to trlea4oqs9z *q5 avel 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 (thk t6v7yn-d vvq a52g b.h8dht*)mwf6ke distance 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 echoch ni lp2gx:e/3/oz d. in 20 ms after transmission. How far away is the reflecting olp .cz: g/nx dheo23i/bject?

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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 ab*uzaub z/v c99 n7tl;nout n* b zn 99l/u7cav;ztu$1350 \; W/m^{2}$. 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 a.05fxtr 5qnq ntmosphere) at a rate of about.n55qfqr0n t x $1350 \; W/m^{2}$. 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 dist- tq*df71u ; y ooosap8;d6azqance 2.5 m from a 100-W lighq;yuaas6qpd7*o81tz o; fo -d 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 ool5+h uq/(hp 0yg(ddqk5wmo wsm (47m f the magnetic field at a distance 2.5 m from a 100-W light mmo7gk( qh5du(sy 0mq+5wlw(o h4 dp/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 diamete /*vo /xevb bbs c7a9bd2uu(i/r. What is the averagev7ecb/2u u/xbi9bd *s ab/ov ( (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 mm in diameter. What is the uhs( efdks.7s 8lih791.b nswaverage (rms) values.n7(wb li1sd kh hfse7.u8 s9 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 transported across )7 y.zhkk)ib ca $1.00 \; cm^{2}$ 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 tmar , 8,+f:ky ds sovg9e-*xkghat 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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