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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 w 4si8x0y8n)xjz(vj w yere 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 produc*/wf r;9q g/gbkgyu j.ed 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 wiuh0x y 31f19 canpkaz-ll 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 vacuum aahpswr.u-jzi*e n75h * 8vo*f t

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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 electromagns izos07azq4s)6e2j o si 1v)u j61pibetic waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves ca(84 pf0 8.m:wfkm abk :zv/ush.hvweyn 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 magneti d(m)/nksp dbe95 l9vw my:8hxc fields in the radiation field are found to decrease with distancxvpwhemldy8/s (9km5dn) 9 :be 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. p9ww shvh144bnptz2guh9ilaz/h) *- At one instant at a given point its*9zwhs2ih 4au-1bn hp9v ) w l/hztpg4 $E$ 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 5y ytr/ sr-h6mis radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire recerh6 r5ms-ty y/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 a q/w,tnt8 zxx6re

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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 electromagnet z75cp.q;dfk b,eu 3mmic 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 wavelength j ch1583unjbmwh0qloag70 m8 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 tisv (ed;o.x+f yme per unit area is thex.;+s foyv d(e

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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 waa5;w0hk2ip5d ktf6 ijpu c8+mve 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 a4pl8:prsp* s/m- c5hx:6jnpsod6xc waves in order from longest to rp: ds n8*6l c4s/mpja -opp :xhxcs65shortest 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 zj tvpv.v k3u0 .v(qd1(+r bs 80qlukppeak value of 2.0 V/m, what is the peak value of 31(rsuv(.pvqt0pz v8 +0. b ldkqvu kjthe 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 waveleng+4gl ja,vcdekdq n-n1+3 6j t)j/cqbith 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 radio wajk *x,oa o7mr+ve?

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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 a freac5sf b93*z)r kr.go rquency of 7.2 MHz3 g .5czorr )a*fkrb9s?

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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 stk5 geme d-1/n4lyz4bblot5b k+4rl ; ration 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 m x ztb *n-bgk*2(let2aicrowaves?

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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 mswwn nn(tjzkj-n mwq7 3fb0)08?

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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 light0) w az1an)hbzp +;xqd 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 avft/p66cssl+c 0j m: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 q1vfw*b:pf4 sdistance 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 transmitte)m 9zv:g nb-tmz ux84sd pulse return as an echo in 20 ms after tranuxbz ):zg9v4m stm8n- smission. How far 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 the Ea mxxiz*lz10 -nrth (above the atmosphere) at a rate of about -x*zxnim1l0z $1350 \; W/m^{2}$. 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 reache06tfl*1t// zfivwy8,l9cfi y(hspvz s the Earth (above the atmosphere) at a rate of aboutcs/il61vyy0(,89lv*p f wzh/ft z ift $1350 \; W/m^{2}$. 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 fieldieo ffm8oa7zy smq pq7rb1rz56*h0 52 at a distance 2.5 m from a 100-W light b2fqe0ryo*r7 p5zf61 iz h8boa mqs5 7mulb?

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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 vvfuu/r3 w +ec7:jbiz6alue of the magnetic field at a distance 2.5 m from a 100-W li3vfwcr7/ebz: j6u iu+ght 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 cl/sjb+v-nm;t * vs4waverage (rms) value of the ele4 snv /ltjc;m* bvws+-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 narrow beam 2.00 mm in diameter. What is the avj9 kijpe u:s,9erage (rms) value of the magnetic fiepjie9u,j s k:9ld?

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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 transpor+1o+j q p0quy+oe1aeg ted 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 averagee08. c3 wy4ps/blqos/ ynxmq; 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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