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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 elj0h3xxt ju2a/xp*x t0a 8-wdnectromagnetism 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 aa7,hmbg 3- pmuo1p40 g c.hztap)u(tproduced 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 fietp t,*y*z7 1t3cehd zdld 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 travel through a vacv4f8 n lnx0zo3mpgb9 +uum 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 velocitykh bs.cu n(8y( 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 ca9wb /m5uuzts,a-znxb /8i.gbxr3*us n 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 magne9 7,qy.f5;e9dysbfs s g,adxktic fields in the radiation field are found to decreasee , gs 5.kb;,7xayd9sqfyds f9 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 tomms.,lbq/6gsj (xgx+ the east. At one instant at a given point itxs g6mb/+m(gjlqx.s, 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 radiated by a straight wire an 5-(jc-aaadqopc7uq: tenna that is oriented vertically. What should be the orientation of (jcupc-a:q7o- 5 adaqa 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 wavesrf +h ;,:enece 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 no h5)/pwbfp);txedv a7t 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 in -d l uzbx1fy b6ec3j4;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 pr) g l7sss/.*h vqpecv,m(v/wer unit area is thew lp/,ec(s 7.m vgq/rv *s)svh

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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 io h g3d02*lncqs 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 corryko3x)3s6zx75i7du e1 mp jhiectly lists electromagnetic waves in order from longest to sh7 53d6hx) 1ems 3j7upizyixok ortest 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 the p fb8bjh zr0p-+eak value of the magnetic fielbrhpf 0bz+ 8-jd?

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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 frequ9t36os - xgczbency 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-vmc *8j9l+h 2owjnc8urvjvh)eu,4xh;zi :p 5MHz 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 tragfk -h2:egmyv5zabk4g *ol65nsmitted at a frequency of 7.2 M g-6*ye 54m vag5kfk2blh:g ozHz?

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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 wa*idhfde;k 0u* pk .z9rve 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 mmgp/5lexx8bv 8u)n1ed 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- -ivrv6ls+vb 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.j7k uaki:*qjn n p07r 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 local0btb7 .,dke/ jiznpto*d it 77 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 (th (07n+j( p-5xzn iqr onit7cxve distance 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 return as an echo in 20 ms 3 ; alxv+xtx9z3d:vvg after transmission. How far away is the reflectinglv; a:vxt+3xvzx 3g 9d 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 b lzin39erh 1(reaches the Earth (above the atmosphere) at a rate of abouh b13zliren9 (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 the Earth (above the atmosphere)ju3gbj z 0d+lmu o;n(m/-odl3 at a rate of about jo0g num;z3+uld 3l( bmd/-jo$1350 \; W/m^{2}$. 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 fieldtk)hqr 5not 46e,erl +a5ze6i at a distance 2.5 m from a 100-W rzq5 e6+rli4 n)e ta6e,ko5t hlight 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 magnetic field at a distance 2.5 m from a 10qo)n aa2.uez k 79rm.5dgcfs-0-W light bu7m)gand5c .-zr2 e. kf oqa9sulb?

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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 ave 2stuj dxqrz/7oq.r nz1.y:5fdqx -1jrage (rmx:1djqd x-q n qt7.1 rzfy.u5zj2 o/srs) value 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.kppk0zrh *g5tk p4y:r dka9h0k3;j66qop 0c k00 mm in diameter. What is the average (rm4 :ockkp d p6kzp0 k3r*k;q90hj yrat5gkph6 0s) 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 across a h i 5 tl+ke4h5vv5r9mx$1.00 \; cm^{2}$ 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 Sm:pfrx1sp 1 64xk (0on q1dqoyun, 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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