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习题练习:Physics Unit22: Electromagnetic Waves

 作者: physics   总分: 35分  得分: _____________

答题人: 游客未登录  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 l ota*9nauk97tku1w7 electromagnetism 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 produced bykawx8u(;jq nop6qh*3 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 produbbpg:;17b/ou8 ;asbr njo zn/ce 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 trh/ ugnzzg h,d7 m (;fy/2tk1usavel 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 electt5e z6- vp 6vcgz/bl:aromagnetic 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 travel h2cmu/f c;0 lgthrough

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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+ mdypy 9.rfh4kiq(+s fields in the radiation field are ks d y(y+r+4hi9pmf.qfound 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 insojy q1:,7esuo )oyow8(6hab btant at a given point its)ooy a7, h 6byje: 1u(boowq8s $E$ 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 bn a(qm g,kkz31y a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving(z,g1nkqma k3 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 wavegpj3rpq co9 ,;s 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 not e)f)et iya8 bf8k.r7o suoo4x9 lectromagnetic 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 feso:6qca 4eg: b( x.tprom

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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 trcp5/twu5b 2qz23 /kc9e injqz rt 8*qhansports per unit time per unit area is theckz2tq2uq38ep w5n*5jq b 9c//zitr h

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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 ar7),icbv0/nivae u4 hj;ou9p xea exerted 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 electromasq5ezll4n n 5*gnetic waves in order from longest to shortz4 *nle l5qns5est 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 q:xx6d p3(, )e ,w fvbytggat9in an EM wave has a peak value of 2.0 V/m, what is the peak value of the magnetic f):f9wgxdy qbxtag(3e,v t,6 p ield?

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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 ti fg1pd;nbww9 (o3q4 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 wave3: gq53s ga3ny knkg+u?

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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 transyv0hb+2y sh1emitted at a frequency of 7.2 2hs vbh1eyy+0 MHz?

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the waveleng rvg3j .xt*az7 +o8pw;yl e t(+ 4g*iznvcqk2wth for the carrier wave 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 mm micro 2 z4w.z hhp;zrn,xz9hwaves?

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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 travxiy.581 mx-xu eaon; del 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 travel7sqferj-x d,)idj p)6 v oy*)t 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 mile i 4*(l.4dhn -bp uwmf-j9wykts?

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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 gxmhn ,;1:cmein 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 qay3dym;u)q3ukc v -8in 20 ms after transmission. How far away is the uy8vyu- 33dac)k;qm q 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 Earth (above the atmosphere) at a rat rhsl7 q-jp)1ea 2t3dee of abouh ds -27r)ltqjeea31 pt $1350 \; W/m^{2}$. 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 th2e7o qb dwlk7g f(iu3d-gec/cl 1d;,ie Earth (above the atmosphere) at a rate of about uql7-eio d,7l3 fbi2; wgk1(gc/dd ce $1350 \; W/m^{2}$. 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 100-0niyqw racng52t(bb6rdc4 +:W lighqwn b56a 4i(:tc dy nr+rcgb02t 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 fieldqgd0t4 sn qh3a*vx+ .t at a distance 2.5 m from a 100-W lit0t.a s+vdn4qxg qh*3ght 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 22n xeo 1b8pqz+l7+lx 9kg(gl j0ntb; b.00 mm in diameter. What is the average (rbb+bpo tx9j lnl0x8;(1kqe7 2nzgl+g ms) 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 2.00 mm in diameter. What is na k7wl6)t9k 5uyv7 wsthe average (rms) value of 75uv9 twk l7a6 yknw)sthe 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 acr52ok)(lnnol-a*ua+x uy sab lmt+k 6:oss 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 mr0ctqcazt.i x.( k4 ,x4af 9lthat 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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总分:35分 及格:21分 时间:不限时
未答题: 已答题:0 答错题:
当前第 题,此次习题练习共有 35 道题

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