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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 electromagnetism were u;8 itarq5l 47 x*cxzcdeveloped 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 bag;q6+ p p5yx2o kgb*dczp 6qb,/a1 hby 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 w h;uqgyg mvmw 64c7j-i1c49jiill 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 wavestr0: ,vpu(zlhz 0)v pc 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 oxi1k 0o 6mm/ -pxcnmx,f 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 can trwssxco:h e5g kn;obg g3o* -.(.7hz uiavel 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 fielee1yy9nf n-)l ds in the radiation field are found1e) eyl-n nf9y 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 toqevgiis e9i6 .+mj 8xq e+57nq4xm ,jq the east. At one instant at a given point its qeq+ +xii4eise mg6qxm,. n8q957vjj $E$ 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 antenna tha lg2 ,tsorwudb:xx 34i55y/n o4jcpb2 t is oriented vertically. What should be the orientation of a straight wire receiving anxwyxb g ,bpslo5rc5i3u442j t dn2/o: tenna? 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 aren2xz eq. *hac6

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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 in natuv q a7dqc:q7t4re?

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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 fme :1mqq) y,,u i(o)wkb1 (rwuqflpo.rom

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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 area is thf d4+b(p0x fnzpv6*hwexwfb *+ppf64h0v( dzn

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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 d.0 lryi8hzg ha 0uih)kff)9suy(o+8 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 electrd2 +tt3h(vhs+9wc8 wl) vigs womagnetic waves in order from longest to shortest wavelengthwv w++wt 92()3lsi8tcs dh vgh?

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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 pek 7u5t tat;7k2ha3w yrak v3a7at;hk u2 ttky7wr5alue 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 wavelength of light waves if their frezg5h,w6v3 ty kquency 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 wavhbbrf04( 1or le?

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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 tra9y6kup2qg ut+nsmitted at a frequency of 7.2 MH+9u6qyu g ktp2z?

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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 stakkl2+l9z1th zy0w y+n tion 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 2w6/pmm tp3s;v qg 9ljp1y+ya+ 0 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 m;p* xb xq::fksh ie9k5s?

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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 lig* x(hkcv2w d :b yo0zdr05enb7ht 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 sig0nge9q,yq9;-dq57fu dlps kj nal from 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 distance light travels in a a)):0w/ufia wz9 yzfeyear)?

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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 tiim:fv: e y/x uzd v.zl+1,za-e t,lo5hat a transmitted pulse return as an echo in 20 ms after transme 5x/ld,ozaz1u:zf,yvi.+ -ivt :le mission. 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 Earth (above tan;+3rbn8my 6:s1hjnqvlw7re.lfzt w m) /;ahe atmosphere) at a rate of abouth/ty:f;nw 8selw a qrln7;+)6a. r1jmn3mvbz $1350 \; W/m^{2}$. 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) at a rat :nbniyqgiws+*kb f* 6p,+0ln e of abou:gikfwnp0 **sb +bl+yqnn ,i6 t $1350 \; W/m^{2}$. 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 at8w501z1u td bg.xqmat a distance 2.5 m from a 100-W light bulb 0qd15xtg wmu1 zat.8b?

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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 4kfp a/o9u ueoj+z:*pg)9uezthe magnetic field at a distance 2.5 m from a 100-W light b9 f /up u9a:*z4pjo gkuoe+z)eulb?

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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. Whatjdh* moi-.zfp0m; b,x is the average (rms) value of the elex z*bm. ;d,j-0ohp ifmctric 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 theqfi vv;/r c f)apo5:sbmkm0n 446c .fn average (rms) p bmq5vasfkicr .4/c ;n:mf v)f0no64value 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 vrjo7* z re:v u0 y4pzd/8gw9g$1.00 \; cm^{2}$ 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 n : thggb81vuxr3o19 apower 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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总分:35分 及格:21分 时间:不限时
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