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习题练习:Physics Unit22: Electromagnetic Waves



 作者: physics   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 .uysa;h4q4cdytx1ze*m*vf: u x 5 ,eafor all 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 prp 4umrm 5h,c+ooduced 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 produce ay45- px;wj b/ uw) u9rwbzs8ta

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic waveyj-gvwr 1d c;;s 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 velocbzo5nr0dp q9ez+w q0 2ity 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 ; 6z.drffp; wtcan 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 v(kdrih*ub8-hwh*sovk/w b g71y ( g -radiation field are found to dec -bgh id(/(ou* h-vr8w7yk 1gbkvs *hwrease 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 eafcl ea-bz45i m08uk 4ost. At one instant at a given point itskca4m0l 8z5ofe -4 uib $E$ 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 db:qw) :yecj .c/rx e*antenna that is oriented vertically. What should be the orientation of a straight wire receiving *c. eer/xjqw:dbc :y)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 bbq+r.zsc9c9 re

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, whic7l 11,jl- v4geg1c cc)z7fr2xfgum krh is not 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 iax41b)b pup -hn 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 per u.lj /y jp ,d8 iw*.o*zslaeut*nit area is the puw,ad.jitely * s oj8/*l*.z

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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 pbwpe+4c( th55zvhp - 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 correc c0m) 4ibaihpfh2 *nji*ws,7ctly lists electromagnetic waves in order from longes4i)w0*inscbiam ch 7, p2 f*jht to shortest 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 *rfbo nf89mw :peak value of 2.0 V/m, what is the peak value of the magnetic fiel *rw9: off8bnmd?

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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 ql5) sk.a ip1kx;)lratheir 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 cg 80:t2-dmdav9f (weeyjtr2phg( 4x 92.9-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 a fr25vnu ,tku7hiz1y3v(azx :k m equency of 7.2 M ,7zmiyxa k2 z (5ktn1hv:uuv3Hz?

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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 statzg.nuhc 975g iion 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 o nwvuu2k-2m.e/tm ib94o - pi20 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 travel in 1.0 mh gswf*dg;k, )s?

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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 tt5zp+uz0hq:*tu *unvfq*5t v+ quu u ;o 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 ra:)r9*yad 01cbod 8 bb fpv1qntdio 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 distance lighg :pd 9/gzvbdc:xn 2-rt 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 transm 1vv3kg+ ut,purrq j.2itted pulse return as an echo in 20 ms after transmission. How fr vj. qu+1u2t3 ,kgrvpar 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 Earth (above the atmosphere) at a rate of aboj yr*fy pc:e6 ynol-(1ucln(po6eyr*yf:y- j1 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 (r3swhco/3 vrj18u , kmabove the atmosphere) at a rate of abovh1w, 3 3c8/rosmjrkuut $1350 \; W/m^{2}$. 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 electrich (zo)nbpvt+2d8m al. field at a distance 2.5 m from a 100-W)oa hnvt8( dzb2.lp+m light 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 100-Wlt cy(id)2*y f4 ,sbku ligt lc(*2yifu byd),k4sht 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 ou;ab2(nkp4c5oi8k iyqt a narrow beam 2.00 mm in diameter. What is the average (rms) value on o(cbap;i4kqk 8y25if 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 b(anwazx 8u4+rj*hvo *eam 2.00 mm in diameter. What is the average (rms) value ofv w u+az8**nxo( j4arh 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 tvd)4a/f;j orh ransported 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, gd+t sjyru -e8;dw2r ,diven 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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  • 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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