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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 allc ,*e.dhuel7jdq 1 i1q electromagnetism 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 producednbunt2;r.zs3w n 0)tk 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 produce ;rmon4j*t m.fa

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic wavesad; t(tuz3u,n p4bo+j travel through 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 veloci*,4 tc1miopytxjj* 2s ty 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 thzew mgltg ep-/-n0)l8 rough

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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 radiation field aj7smx; cq(f g36zbbgi9n hi 0md7 )rr0re found to decrease with distancer)f 0xmm(b j973ingc 0zqrd;7 higs b6 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 instant at a gr o,2)nb- lvvriven point ir) vnrov,b2l-ts $E$ 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 ist/*-c bzke;dju/avg, qo7d g7 radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It should be placedvd7/kcbe*,/7oz q gud -jt;ga

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves ar( -jilgp-vacf8e e.0ne

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, whicwrw4ai)o 4ix ij11ds+h 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 wavelengthn aw6hs.eg8l l64d,rw 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 uni o;li4uu)2; z5 ,rlhonq d+djot time per unit area is thez;ho o5no ; iudl),rd+ujl 24q

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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 arerqe ds.a0w38/pop/syq+ v:+k k ryc9xa exerted by 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 electromagneticv- es.q6 *kedd waves in order from longest to shortest k*.vs6ddeq-e 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 is51 jevs m7z4au t7,ggf the peak value of the magnetic fgvzfmgs4,57tuej 7 a1ield?

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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 wave8 gwt8q24dcmw9 hoog1 s 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 wavezd;,6; pd(qdf tk(equ ?

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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 tra e1ixl sqtrgzde:nvs6:/m -1 /nsmitted at a frequency of 7.2 me-/ /z16vssx: ire dn1t :qlgMHz?

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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 the2yzb+gu dcr 6; y2mt3s 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 yf/rwf,zw-jw; +tso f/yg;x(m 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 1.0 ms?y hep64i 8sid.(k4zpm2zdu9u

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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 tp+ vc.wl-x nr.ravel 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 statih)g,apoli1(rf y ;nb7on 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 tr9d7zw4as ea*,sa:z ka avels 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 puls/(7;jkfzale r e return as an echo in 20 ms after transmission. How far away is the reflecj(l 7k/;efzrating 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 atmosj lskv .sfd-5)phere) at a rate of abou5sldj f)sv.-kt $1350 \; W/m^{2}$. 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 Eartl )rist)akp1rx jon( f2 o7-u3h (above the atmosphere) at a rate of abo kl 2jo7)xar-s ) (ufi3rn1ptout $1350 \; W/m^{2}$. 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 fielo,vmuinb / -4 o+zcwy5d at a distance 2.5 m from a 100-W lighw4mbzny5ic ovou+ , -/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 .,t lr uam9p42 /kmcrh/4hsqsof the magnetic field at a distance 2.5 m from a 100-W l4rrm s q/c4mak2t s/uh.p, hl9ight 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 diamete95 p( jq45c x+gkp85vu;xt pxx3bno)kmwem5p r. What is the average (rms) value of th;px5pq5kmx4bn( 95 )jvcxkuw+x epo m8tp3g5e 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 mmskpq 8-j)k+, (k(bf-ma y ardh in diameter. What is the average (rms) value of the magnetic fielh( r,apm8qfkyk kjds) (-b+a- d?

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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 ac jr,hq/t64na/j1b er gross 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 averageepulffs :1qjv: w:d-7(ec/b w power 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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