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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 develgpb4n-y,9hny oped 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 proxv tinaxg*ff/x1 q 0s9(ngfhf2 ;f g q*x;3+doduced 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 asopvxya 7djg5s7)6 ; field 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 w z)if ibx3p/(2y5 wdarjs7s;travel 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 velocity of all electromag0/wf/.+ c; yr(n/lg a ;jldxgvj ovkg,netic waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic wavesf vp;oppg(+mfm n89q( can 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 and magnetic fields in the radxaom 1*ru*67 gzyad lf62o,e5mo. vmkiation field are fouu z 5r**,d7my62mflx.6oooaamkg 1ev nd 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 east. At one instant axl0 msa)p0kn*vw-)(c o /gahht a given point ig0 ( amnv)/)kowp-xahcsh * l0ts $E$ 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 ra)wz z +;ii;s n6 b)6pddjx*( lbz(fsbr 5)lfbwdiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receif ds z+6xn)j;(swzzillp6r5 ;bfdbbw)b) * (iving 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 ar xe6s:a,ht 6mtuii;: ye

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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 inybh3y)k, i 0iefhu7djc-8+ hu 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 ,nye k+0vg*7 cure+ex)xb ph2wavelength 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 aro-9jpbm8x1.mi ))qb*h up ro tea is theb.i 1p9)j* 8mtr-) b oxqhopum

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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 electrom/+ufo9kj 0fcqagnetic 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 waves in order from y 0 dycsj*;w4xlongest to shortest wavexjdy w40* c;sylength?

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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 wa ltm8p 5pguwp) lge4oz195)ylve has a peak value of 2.0 V/m, what is the peak val)l984tl glwo ye55z mpu1 )ppgue of the 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 wavelengtsdlx 0d t fy;0m;ebf3-h of 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 r r g/2p0n7g,x3xngwekadio 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 transmitteday ,p x waf:oafm0r.81 at a frequency of 7.2 MHm: .8o,fw0axayf par1z?

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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 tzo+rq *se wvkk6exf.z) k ;53c0ie 97h)inntin 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 f* y cju zc.j(egq08c(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 trave8::ob4sl4yd ard4t apy 8r :wiab ii43l 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 23ruf o2 hind1g/e-fyto 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 r:) u icg- rrrppy8.mq wks.39miles?

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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 3i(i ;fti4kmktravels 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 jmls k-*7-zhmb,o w+ oreturn as an echo in 20 ms after transmission. How fmokj*somz ,b l--w+h7ar 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 t gjv2v)d zj(9q,2bya nhe Earth (above the atmosphere) at a rate of abou9vzb, yq2jna2v)dg (j t $1350 \; W/m^{2}$. 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 th9 gmw2; id3nf qa/us,ue Earth (above the atmosphere) at a rate of aboutnum uqd3s 2; /,giw9fa $1350 \; W/m^{2}$. 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 from a l), )+ pbrh6+ kywvsb;6dqm6d +akbuf100-W light bbk6ybh ;bfu)6w+avddr q),6k l+m ps+ ulb?

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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 distancr1 2k, y5 f-rcpr6fqyce 2.5 m from a 100-W ligfqr p6k r1 y5cc2-yrf,ht 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 narrow beam 2.00 mm in diameter. What is the averagsjq8pv6s+exod1 ,qb7f ;d eb)llm0 m2 e (rms) )+;fj e0mxbs o q6e187m pd svllqb2,dvalue of the 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 deok 1 8 nh*biqf.ze0(is the average (rms) value of the maghq.ozdfi8e(k0b*n e 1 netic 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 transpos8 2ftp46)k)hpehkwc rted 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 outpuxk).zh d8h,lcg0 wd8v t 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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