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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 electrf:jnm 3:snzy /0fid5hw so3w+omagnetism 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 produced by a25 mot.lqkjv 23uze 8p

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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 pr,e9wssp 8 nkm:oduce 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 om3-0rb3gr wrv9li i/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 all electromagnetic wavegp ynn7 tlo k4 q mxgi:-,dne66yd(s)-s

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves can s/(5r 09f/ hvtk ilwgyi:/wjc 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 tz*z5bu:/fybs4ep e/ xck.m8 nhe electric and magnetic fields in the radiation field are p nzk/uzb5cyx/*.fsme8e: b4found 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 is traveling to the ee)rs z94 clr(gast. At one instant at a given point it4g(9 )ecrr zsls $E$ 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 radiated6hk*/j;ll(ihe hv t- t::d qxq by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It should; :v (6lxhti-/*hdh j:qelktq 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*vxxrb . suq-zj1v6 r3r;im/v u:gtb* s 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 +croq)yly61x: wnfrb.3kkr 5 0alv p)f,a + bbnot 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 iknsjpk 1 )zi6kmoo7ct: b+52 to8ju.a j+yi3xn 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 unit time per unit. :xydgmff *:h area is the:x:.mhfdfg * y

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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+x51n-f )j ,elgpw)emcxf4an 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 wth5qk;kw6 xn1 i72mg vaves in order from longest to shov t2i1n6wgq;75 mxkkhrtest 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 f6t26ownqvzpnte-;0)p66kuwea2n rz -gg e: peak value of 2.0 V/m, what is the peak value of the e-e g;pwfv pq:6o2t 6u- 0zt kn)6ear26nwngzmagnetic 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 the89x we /2i3 mvwjqr1*mhqn8r/ska( rsir 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 a5dokazy)sfw1x h*c9 / 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 transp.pz*dr7m h;uh/zf* tmitted at a frequency of 7.2 MH zfz;p.7/rp *dh tmhu*z?

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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 wav2uzm 5hrgl fhqziesi2:65 k02e 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 s,)z( 1)rbx c8lmr cxgof 20 mm 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 1.0v0b/qt- /efhx 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 takkf/jq)h1 q f)fe 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 loca ku3ukd.pjw /)l 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 (the distv,4mfi p.abf zh(h j)0ance 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 retuef)4q 3qrhs m0rn as an echo in 20 ms after transmission. How far away is the refl4rm0)qf qh3esecting 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 atmosphe0,serww:v;ekvco * b xy51idn4 2o 9hkre) at a rate of about 1dvk04:v bocxn * ei5w9sreo wkh;, 2y$1350 \; W/m^{2}$. 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 ;sxswd-q0enyg*51ef ) at a rate of abof ;s0eysg1d-5 xe*nqw ut $1350 \; W/m^{2}$. 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 val1 j t1wj0,p7uoteol6que of the electric field at a distance 2.5 m from a 100-W l01u p,oo1qejt7 lwj6t ight 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 mr-+zp4g obt 2jagnetic field at a distance 2.5 m from a 100-W light bulb jz2-gb4 +ropt?

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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 dfj4u(dt hs ()jux 6mn3iameter. What is the average (rms) value of thenj3juf m4sh(( 6t)udx 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 avea0p7 mc(p.m tmrage (rms) value of the magnetic fic7.0pa tmmmp(eld?

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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 acro.s0 q61s(/k w-ak dz+gkzaaeb ss 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 averageati z(x)9+fu c power output 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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