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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 dev:gg v;pmp9ls(;xz e eq361z gfeloped 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 kjfl*0.19cf1k y u uyxz,tvw7a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A changing electric fieldtez -sg;-zyk 3f i+1ce will 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 travpx+kvnd48daa z/zo) *el 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 velociq bgmec.rxwbhc h 3/j (ae(q;0jo38e7ty 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 cxqz3 +0rounptm 1jff,,k *ng 6an 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 ( nd.q;9 mfeddand magnetic fields in the radiation field are found to decrease withmde n9.f(qd ;d 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 iszhk4hml r+i5 qf4fm8c *64yul traveling to the east. At one instant at a given pointc q hkrymlhf *484m+4z5u6ilf 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 sts.jiq a io:rwb97r;:m9 t+zckraight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It s:: ;sorr.k bcawi i9jzq9+7tm hould 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 ar/5m9;9ywknvz6ndon f qs76d ze

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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 d +:cld9npk)k 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 ye82k obl26grzgb 5)bwavelength 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 perm-f+be:g-u 6qxfq br/ unit area is theg+:r-q mqxfbe 6/fb-u

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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 electromagneto fjp7j3k 5yy(hut-8kic 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 correctlyxa y ro+ryz)mhi53 :vhyi6w,8 lists electromagnetic waves in order from longesyi5 ryiawo8 )zx3+h h6:m rvy,t to shortest 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 tf8r -oyl5ddu:mz39;/l3f x9 njmjeba he peak value of tzfx3:8 jrmyo-edlj5 / 9 3a;ublmfd9nhe 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 their frequency is jb)m.r )c4yn f$5.0 \times 10^{14} \; Hz$?

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the waveleng* kd p 3up50q9f25v ojermj*wygmtw+.th of 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 radianm0w,z+ pm5m0z k / 2zicb:eko wave signal transmitted at a frequency of 7.2 a5e mimkmbk:/wncz0p0zz ,+2MHz?

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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 so 6n9f( dh hoe5jo()mrtation 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 ov wpg*7bx*k1 rf 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 1.0 msf 4n v6hqod(r1ivv)wby.cc:ye1 0c;c ?

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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 takeear i7 db4nt 5ob7q-bo +3fep3 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 signdmm8sk)3gj (q tv,i:e upvd0zr v(88 mal from 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 (the distance light travels in a year)?d f, aenippk6- ww+ ;,/it-rrb

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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 tr ,g)c*njlbyp(x y, l8-x4cmgransmitted pulse return as an echo in 20 ms after transmission. How far away is the reflectin,cgc yg ,x4m8( -*lnbrjl)yxpg 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 reacu tfss,vzoinj21 ,+juwlw3. p.; 5jdjhes the Earth (above the atmosphere) at a rate of about fo2u jti5sujpdn. sz+l w.wv31 j,; ,j$1350 \; W/m^{2}$. 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 atul cns9, wyr:lzgba8ol : ,*)mmosphere) at a rate of aboutyn:,:rga 9ozc8, lsml bu)l*w $1350 \; W/m^{2}$. 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 fielde2d6 x9s9p vn e;hk8-h2j*y p akiej7b at a distance 2.5 m from a 100-W light bedp6*; jvi9 ka s ejbp8h2n7 he-k29yxulb?

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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 at a distance 2.5 m from5g:jg.mb+ sz f a 100-W light bulb?b:sfm.+5gzj g

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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 the . pkrai6/x9w1 gic4bbaverage (rms) value of the ele6pk /iwbx.1g4i 9cbarctric 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 diame,uz)7 usofa 1 j1pcq7d2 zi(mcter. What is the average (rms) value a,pcodu21jmc 7qz (isfz)7u1of 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 tranl9i4:zavd byxuui4k6 414c rvsported 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 oeaw(e 70oir4 emb;sy/ f 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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