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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 developedwrkji+vy1to 4mm/jjfhgl 41h51 z b/3 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 *e ; go1 8iomwvfc35cnproduced 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 wil yzrk/cmb/3 ggb:;w;dijg)p64 hh3 y ll produce 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 vawvq:fq:e g 6 a6mg41oocuum 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 velvxv wf1 8ww2,aq5(h hsocity 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 thr5 i)(tnfxt;jcf 9f;ph ough

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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 6xms 2eu5wm2c electric and magnetic fields in the radiation field are found to decrease with distance amcs 22m uw5x6es

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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 bs0zv6/ br+ j1f8ylu* s wchd .3am6xbis traveling to the east. At one instant at a given point .zfbahvrx1bws08mslu+*3cy 6b/6dj 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 straight wire antenna that is orvd3(e3iej: w4wife, 3yf agj *iented vertically. What should be the orientation of a straight wire receiving antenna? : v4iei*f,3ew gf(dj 33e wyaj 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 aha 0 ozzvy1qz7 7(k8r gvw o7*d8ro(eere

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, whichfvu4 nu2zn24y yk0 rys.z;,wy 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 (mymbdc7;9yw in wavelength 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 unlgm r k zi(ovm:8,oz71:d2tbxit time per unit area is the1bdm8o,t rlozg i2(k xmz:v7:

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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 cam g38ovuxar-uiyr77v;ay1 ru5a67 uhlled 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 lii05l7 dfhl7j05 lbl4x w3a gcists electromagnetic waves in order from longest to shortest wavelengdglai w040 li 57jxb fclh537lth?

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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 hif1s pxz188k8;vfv /mo 7namof 2.0 V/m, what is the peak value of the magnetic p7 h f8m8svnfioz ;v1ma81xk/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 go97kfrlf8l:dt7zi 4(7m5lcql ajn( 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 wao2l;jvh u6; prr)n ko+ve?

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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 ,9hm bv:fowsef k5;z:0lr /hy of 7.2 MHz?:hl bv0:eh;f o/rsyz,k9w 5mf

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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 ,y wz vcwyfm7p qb+ 5u,et9) by21d1zq1460?

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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 mm52ifrjvh -6 ns4b0t l5eu ywj0 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 i9qp1p *j4b5eez;ai-gf al+c rn 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 l2+pi vtm7.vqe/rm2d light 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 travel 20 2k07zp5yl, bmekl nk0miles?

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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 (theg4 wg2ntdcz/1in(m0- jy )imo 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 20 mstbgcwo kzx 95/3hqvy,aj0; +b after transmissiz5y0 kbw3j ;qtog ,h9axc/b+ von. 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) gx6uk8ed3 5kd at a rate of about 6ke d53dx gku8$1350 \; W/m^{2}$. 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 rate ou-yo kg; 9y.wdf about u 9w.y ;gyo-dk$1350 \; W/m^{2}$. 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 distance 2.5 m p y,3pn)h qzp(px7n9ffrom a 100-W lightqx pyh9fpp 3p7( zn,)n 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 om4(a :*2r/1h nbmoi cn1evgdat a distance 2.5 m from a 100-W li b/irgm 2n4c1h *nm aeovo(d1:ght 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 narrow9/gukl z /(g,nw i8wvy beam 2.00 mm in diameter. What is the average (rms) value of ,(w/n yuk vw/l9ig8 gzthe 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 averab1gwx9-nuk)ku cb d8q mlo)9 2ge (ol 2mb9q 1gbcx -n9u8wudkk))rms) 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 transported across aecff-du4 ht-b: j /zc8 $1.00 \; cm^{2}$ 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, gi mk 11 vaacq.8eynyp18ven 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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