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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 devepnh3vxi1e 9(o loped 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 isd4s:e4j agwyr6,s m( q produced 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 9oz l l(h*nx; drfn**qw*7tg sp,rn.nf4c/ fc 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 v. q:w6 n7ygv b7dxzgb*acuum 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 al5tg37 b q/8(uetxj/w y hzgp5ll 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 thro z sgqw)ht1ve*fa3k7w6o9g+v 6u um8kugh

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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 ra qmk)7o0/krycdiation field are found to decrease with dis k 7kqc)0/omrytance 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 the4-;osq7 roy5jax u17lve; c hw east. At one instant at a given poi ;hcx es r-oq45;yjla7w1v u7ont 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 wspo4k+j :c j*jn5m5y zire antenna that is oriented vertically. What should be the orientation of a zjc*45p 5jkns:yom +j 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 wavemc /bhqch yhvcw*7 .,qz4l 0:t:gd w5is 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 in naturet1w4r7+k)u2 eit+b cwmsb p3u k6yv7x?

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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 wav9vlre ybzzon :(mp2zm 39g.i,elength 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 transp aw te 7.17u78a5h vjj9vuhnjports per unit time per unit area is thewjh.9u8 uv7 jen1aht5va7 7jp

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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 zexul/r x(ar wr n(re )x8kkp(h,;8;n.vp f. relectromagnetic 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 listpl8ddd4 mzer /8; jks-s electromagnetic waves in order from longest to shortest -8 lpdk;e8rzd/jm4 sd 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/mn1i:qhh (f w4g, what is the peak value of the magnetic field?hwhg4q :(i f1n

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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 i x)jdt);g;wbzav6 :u kf 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.,,w pct0f rtty:y1m;ygy70b y9-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 azvw35et g:f2.f8dno w :kp/ra radio wave signal transmitted at a frequency of 7.2 MHz?fto 5k32zd p8.:g nwaw/rfve :

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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 c*a4m ef45pyqu-e r - cgxmyf18arrier wave 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 mih n0coiibc ;6c.7c plr4k.itz 84vy(dcrowaves?

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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 1b- evfem-./ i)s atks:.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 c3(m4*2c1om dfzypk z7;pmoj 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 d ,tgxxq7 s1 rye4rp(3uh :tjt,8g+m-uis *hmstation 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 travels in tw.-ah yuv5qfvk5a.fei9l6u:r i)- 0armjl0 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 ae;-3 w g*f wotc)avmd e)a.k6qn echo in 20 ms after transmission. How far away ik 6)qa.e*3d- mwto egvf ca)w;s 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 Sg+gb)3q td e)/arau3nun reaches the Earth (above the atmosphere) at a rate of about ut )g+ren d/bg3 q3)aa$1350 \; W/m^{2}$. 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;4 h7 ukxowz(k Earth (above the atmosphere) at a rate of abozok7wx;(u 4khut $1350 \; W/m^{2}$. 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( /ad6ht/l-/rtsr.ij fr5jf j-cmu ; y 2.5 m from a 100-W light b--/yhtdfjf (r i;jj .tul5 rrs6/ca/mulb?

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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 vivh0 8: l)dom -l)njaealue of the magnetic field at a distance 2.5 m from a 100-W light b-d0eh8l))n v:oai mljulb?

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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 dioy:z,a7 mby1 bameter. What is the average (rms) value of the electric field?,:1 a7bzmyboy

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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 narr gwq.m:fmunf v986d h6ow beam 2.00 mm in diameter. What is the average (rgm u6vf:qfdn.69m 8h wms) 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 ait l d8e-9vj46bbbe5qk5f.uwcross 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 ou9e; v(cy7c ldz3yj2hq9zqr q) tput 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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