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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 electrjv+lzqt( 0 *yxk2g.r/ 7 wydtmomagnetism 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 produced4+zyljx s7 )-jkihyu1 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 producmzz *sw9tl(92 ku+, e8kbbj pwe 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 vi fpu /18x+b mx7jae2macuum 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 electromagnw gybpr0k)i 1o/ig9+jz -q5kjetic 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 traklu 2zuu(+ hag8ixdy55 tj1n5vel 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 and magnetic fields in the radiaitz 8 hv:qt4 z(8fuyq1tion field are found to q8q ttz184(f:zyuhivdecrease 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 travelingt6m.cms xo3/ m5ahkb; to the east. At one instant at a given point itk m;3o56c /mm hxtsab.s $E$ 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 r(6 j6uw ed7-y:-xmx- af kvtwradiated by a straight wire antenna that is oriented vertically. yw: 67urt-mavf x kjexwd-(-6What 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 waves are ( 7t1yo 9vp.srf:renxesee +3

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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 n rk 0:vytcn*sxiw+f(i dd)o /5ature?

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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 wavelengt*bd l5xbcys*f *--tf vh 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 electromagnetibgqtnqkb, -79s w 32kr )z.cujc wave transports per unit time per unit area is the bqzr3, .kn)k72s jgbqwtc-9u

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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 exerted2xv 7ile-*cb3f 7ivm o by an electromagnetic 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 lists electromagnetic wave+ xu 3v 0q+5g) wewcwy3np sq,r5qbc:i,yut :ms in order from longest to shortest wavelbeq: xs,5,3p y )5trywqw+wuvc nci0gqu+: 3 mength?

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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 trfwa 901gw( be4f oy5zhe peak value of the rf0 z5(e wa94boywg1f 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 li;x3zjuxkxupf n 6*5u- ght 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 92kli) j7nwn 5f4m(2,vjve , 4p/umadym.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 transmitted at 2cmgm yfb:l4uwp ( .nlq( * 7gmael))ya frequency of 7.2 MHz?q7ygaeb:lc2lwpynl )m (g f(* mm).4u

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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 w1pua v7zl snkg*nc 6by,e26 0yave 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 2. y*qotxow v,p8vo42u0 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 travelldjg1bs6.avxm * r:7 g in 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 light to travel 1.0pg0w3icqn(v;nb4a. o 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 trawkkg- kle9l vpx.m8,2(my kk, r4g*e qvel 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 trs9l akjs q1e4*avels 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 tr, vcuq 3td6.91 4sjtx ravm9r( cru*0w2otjwhat a transmitted pulse return as an echo in 20 ms after transmission. How far away is the reflecting orjw9(m0o,*c2x twrctr 9.qu 4 1av 3trvd6jusbject?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Radiation from the Sabzz0skslejtl : ;6 i4w+r82 kun reaches the Earth (above the atmosphere) at a rate of abo0es+k al k;irtwzb2ls 846z j:ut $1350 \; W/m^{2}$. 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) gj(m) leh +10 rt-vjzcbsh/.lat a rate of abouhm j+rltz( b0s -jve1.) /glhct $1350 \; W/m^{2}$. 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 tli a :znm)8zxwtuf5f+ h56f 5a distance 2.5 m from a 100-W lt5zw fa 5+tm5zf)ui6 x8 hl:nfight 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 tvv uio9q9rrb61f 2,xwhe magnetic field at a distance 2.5 m from a 100-W light bv6 r9f w2uxv,9 1rqiboulb?

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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 ouxi6fg*f s6si 0(fw5int a narrow beam 2.00 mm in diameter. What is the average (rms) value of the elefwn 5xigi fi06s s*6f(ctric 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 na;elfqlz3wm/ w7r6y2 prrow beam 2.00 mm in diameter. What is the average (rms) value of th/2 eq6lzfw; lpr7 m3ywe 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 transpow2bsv w,(hm0g9m x6j frkzi .7rted 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 Sun, given tha+ 1 niq eoys6r.i0c2elwnv 5-gt 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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