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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 werbc mxz mvk85g9.ne t(4e 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 hp :zexd/k+a-n8-xms 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 product 7r-3frqyl .ke 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 travlvd zqo is/*+m).sc5xvpm,x; el 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 velocity j:34eb2t0c )qzc yvag 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 travex ,t9:*poz jdel 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 m6vmt poi s4i14agnetic fields in the radiation field are found to decrease with di mio6vp t4s4i1stance 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 far5 s6wz)c4d9y,n9mqvh: c. xsnu6qs5sz ,o the east. At one instant at a given point itss whsczd ,.cxnfmqsao 654 9q6v)n,s5r 9:uzy $E$ 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 strg ec4,0q iuan+kfer.j td 4y s2)t9z.jaight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It should be+cqt9akf y ,enj4d)z4 g .eiur2tj.0s placed

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves azjn(f jy(( 11ap fe1y ama.x(ere

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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 electromagnet nre.wq2 tq8h4srk-c0ic 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 waveleng d/3bgvvtok* 6th 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 un)lscybtw .y q65sx.6iit area is thewi bty6x.yc.s6 )ls5q

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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 electromagnet/qs0kr;5t hmks 4:hul4sh .zq ic 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 electromagnetit alhru.w ;vv/s 3v8n-c waves in order from longest to nrwhlv8 uv3t/;.-sav 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 hastugil2so m. 9..3tij g a peak value of 2.0 V/m, what is the peak value of the .lg3 t.2omt sugi9ji.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 light waves if their frequency iux-ld3q9: oye-xa zz3:uw7sq s $5.0 \times 10^{14} \; Hz$?

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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 r( wy6oxf 3s 0)m58dottmbb8x kadio 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 7.21am* teqrjctjd geh,im36c 4,v9 wj7+ MHz? 7i 9hvt,j g14+r3 ceqwje,tda*6jmcm

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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 1460l n,vzul0 nh0 9d*rhdwv c:w-5?

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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 m 4o :g0gy7lm f)f+/pvsazf,tgicrowaves?

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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 m0uk)q tg p)sspj4/ 9xdfd )vr)s?

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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 1.0dkx+.yq 6)am e:) iuhqsj+ka* 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 ton5fgfi;d6;.d-as6l rh6bnrx g- c3b ;+ c bmzt 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 . 8sj2i,t nennyear)?

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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A radar receiver indica*q-20tfdnu g otes that a transmitted pulse return as an echo in 20 ms after transmission. How far away f q0g-2*udtonis 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 rea)m.yzb slgqdg .5my7* xn(/wwches the Earth (above the atmosphere) at a rate of about .l.(g *)mx sqdy n7bm5wyz/wg$1350 \; W/m^{2}$. 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 atmospx.ze ;.esd4 fphere) at a rate of about ;fs .e e4.dpzx$1350 \; W/m^{2}$. 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 )ibd*;f8q p arzvppm-k)*-xv the electric field at a distance 2.5 m from a 100-W lmdv*)r ipv b8p * xz-p)-a;kfqight 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 8rq :ifz aqe33the magnetic field at a distance 2.5 m from a 100-Wrfe3qq8 iz3:a light 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. a3jhq-e 16lys00 mm in diameter. What is the average (rm jsql3a1y-h e6s) 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 ximp qhiz(g5*ek ; ,v7(t1bwxthe average (rms) value of the magnetic field?m,pq;1 txezwgvbx hk57(*(ii

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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 qznf3:1kr-x(ib m tt( 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 output of the Sun, given that about w/h mv94in2q+z f-q lq$1350 \; W/m^{2}$ 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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