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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 weres, 4,a:(h d k srkao2eonnaw,, 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 prodm1vvohd -e bw6h/-m5quced 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*pl 6i)jd wc5a 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 te4kt u40w*73xod- iwh5 uxg cgravel 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 electromag2v eerk;iw*2i netic 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 throu ,f0pr;)uq ybz2j53kc o l4fozdu.,dvgh

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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 tnazf + o-wpx*/he radiation field are found to decrease wi fx+pano/-*zwth 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. At one instant at a given po 5/jbcff9vzp- int its9c/ fzbvp-5 fj $E$ 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 oriented eif.bs- bn 87qverticfnb-e q.ib8 s7ally. 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 wave.q(s)*0q2 nku8;mg kl b wwwlxs 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 o jqgt*q6 v7if/:g5nain 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 7i 8 fal0hy7 my/son;)im2 ughwavelength 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 unitg 7*vlx-. zj4 d,sdtvw area is the g7zlsdt,*v. xd-j4vw

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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 electromagnetic wave is cameejf*+4eg,b8j :ul)v q0 ylhlled 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 eleet;yvrb + /yz4ctromagnetic waves in order from longest to shortest wav/y4+ v;yrz ebtelength?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric fielddzvi(/o rw x2s 2tna6- in an EM wave has a peak value of 2.0 V/m, what is the peak value of the magnetic fiv2srzd 2n/6io a-(wx teld?

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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 is :mde8lch3b*g $5.0 \times 10^{14} \; Hz$?

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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 rj om qqzhm 47)g*1w*azadio 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 signan 3tp y:r(cugcdgx0y+:1 nny.l transmitted at a frequency of 7.2 MHz?1:c.y+ gc0tp:ugny nr3(ynd x

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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 WBRNey9qdtc k m :s3pyk6(- 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 mme92n(n tyh d1ps0mtcu-n r( ,s 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 msc7c+q3 l60mqon hes zpr.9gcb9x(f4 p?

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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 1.0 mg9hsk4qgx-j6mgy+fn ;9 tn p0 ?

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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 travel 20 miles(j-mux;ik3bkx(/ *vjt ; pis nl0s :il?

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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 uvxy; e; kk37* ynq 73n/wlblza 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 an9 a-9 ( g*rbdgf,hcbrf echo in 20 ms after transmission. How bd(fra*9, grhc -fb9gfar 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 (aboz;t8jjrnf/c qox:. g +ve the atmosphere) at a rate of abouq/j+xj:fz .n ;co grt8t $1350 \; W/m^{2}$. 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 atmosphere) at a br z7z2 61zd)uh fgn*rlt q6*lrate of abou*z6r z1qf r627dzlub l*g)n htt $1350 \; W/m^{2}$. 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 o :r/ef9ytoxl/ f the electric field at a distance 2.5 m from a 100-W lig: lr9t/f/oxyeht 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 magnel s pqu -k* 8rsl-+dwdhw7-ab)tic field at a distance 2.5 m from a 100-W light bulb?p sh7 wwrdk )8q*sba+-ldul--

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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 diamp75v vajie-yp2 :d 8dbjynvi y4.tn4.eter. What is the average (rms) value of the electric field?5nd:p aiyi v .4nj4v-.v8d py7bytej2

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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 i*nt 4 :j(oxlcbs the average (rmsc(b4to l: *xnj) value 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 transporte v0sdllkc4 b8)j+rl0m0 8gunud 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 Sunj d cq49drsu/,4sda w009uh*3/nxiqzwj xg 3 t, 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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