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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 electromxj+*tq ok,v7a agnetism 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 pusx4z p l/k9d5roduced 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 proea76iwm(ewxs5 m1nc adii.*;g0 kz1 y duce a

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic s9s53 sh7r.a lnm grbja7 n8. pwi2.yrwaves 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 velocity of all electromag m;o*ej vnd:axwuvg3 h u2r 8v,m83o(qnetic waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves 5e uu pi r+f+8/xiczb+wor 7b,can 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 electric and magnetic fields in the radiation f 6 t5j8huhf)x41uttns ield are ht1s n68u ju fht54tx)found to decrease 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 i .ga660qj. dcrg/ opbks traveling to the east. At one instant at a given poicg/g.jra6o .d k60qbpnt 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 st,- ij2*ma9 nmbqp/eb graight wire antenna that is oriented vertically. What should be the orientation of abmaqp*gin-b,9 2m j /e 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 a(a hqp*:u(y. hmab/t xre

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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 (9fehvghc5 h:*(birp 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 wavelength m:g xsk ;1y(qafrom

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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 o :pmqan40;zc s088u mml e2 xl6ck8jhtime per unit area is the c; mu 4paoeq8kcxn 8s2m8j6l0zmhl:0

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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 electl edw4p3se;b t)gv.:zromagnetic 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 order fromda js4zhsve2 zm0k(e9;1)grm longest to shortee kh z;s 0z 2mmaes)vdrg19j4(st 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 peaa-y dn) kzm,xz,ye* ;pk value of t, e*ym),zz-ypk ;n xadhe 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 thyicq o, 49a/saeir 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 qjvcqv54 h9drny+0f 25wz; jiof 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 7.2 ih :qfe7)ms4:l8bc mj7shhu .MHu ih7e sb) qj: c8.fl7hhsm4:mz?

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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 wavewi0-66ndzpcfs o2- le 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 microwaves?o7es:2cy1kf5qe8v 7gdqk -ds

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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 in3 h*v/n2e spx2fjemhd41s e)r 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 light to travel 1 u7dj3xaq+ux 3uu)y3z.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 + k3,2bwwkucc 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 : *j zkn(wx+bu++ debm(the 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 echo in .qls zf;d9 t1 hqnx;x*20 ms afterz* n;tqd sq;l.xhx9f1 transmission. How far away is 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 ad8)b loq i*)s6djep/dfz+1j k rate of about/ *q)bzjd ieopd j18lks6df)+ $1350 \; W/m^{2}$. 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 +l jc4dw(xk-qreaches the Earth (above the atmosphere) at a rate of aboutx4-dq j+w ckl( $1350 \; W/m^{2}$. 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 distd;nhv))yms 3p f96zd0ggb s5wae 1e b0ance 2.5 m from a 100-W ligs h db013s;pe5f60gn)bgw y9v) mzdea 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 value of the magnetic field atwjbs*8qbo d9 s3 5+qn5om;qdw a distance 2.5 m from a 100-W light b;+ q*wsjbdbsmo qndq8w9o 355 ulb?

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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 6 i(kni7khydl;u;a2 myv k/n*the average (rms) value of the 2*(;/hi dn l6 yma7knykuvik;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 narro+w (gsvlmaz1) o+zqu, w beam 2.00 mm in diameter. What is the average (rms) value of the magnetic(zovu 1qglz,+ w+)a sm 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 q-rtio/8qm, ggf 5ke* 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, g(uo - z9my;h2 /9ock clxe-zoyiven 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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