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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 for all electromagnetism were developqgy7b 6i8zsm ki ,f5r y -/3fvp*c+uduh5iv0aed 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 producee7 *xfpq ozd:8d 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 a)s;mk d k,8bqbws0 x ocjm0qm/u+6c*s

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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 ;4sh x 3i.biqv -zrsqbi/l86gthrough 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 almx-4i:ix0pmwco 6yr 5g) k 2t9gzs 6ubl 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 travel througqkf(07b u;g r-p.a i6/vzmp vwh

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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 magnetios:agueh(l 3ca x 6+xl6v 6nd0c fields in the radiation field are found to decrease wnclh e+s0a:xu(3l66x6govd a ith 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 thb -l vxwjsgd on0 y:zpy;+*z*1e east. At one instant at a given poinzwby0ldj;1x- + *:op zgs*yn vt its $E$ 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 ra07djip kwd5 sk a4:ht tft)v,*diated by a straight wire antenna that is oriented vertically. What should be the orie0 ti: 4k,*j f)5wts7d hpakdvtntation of a 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 waves area2d3- rkhf0gum:f bgz)bjr + 5

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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 electrxev-sv b303juzboc85m,j5ud omagnetic 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 w+kk t .+opvuiit2tbo4;b1g 5eavelength 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 electromagneticg*1sk7h71)qk6uck,o v+nog goqwm1c wave transports per unit time per unit area is the7 o6+kkm1,kcgguhogq c) o1sw 1nv*q7

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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 mk:,e;s x8h2*wfn( umpf ol0kby 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 followingo rsb*3;b yn9u8fnrq:irwxj. pgc*nw0/qi ++ correctly lists electromagnetic waves in order from longest to shortest wavele jio n*yq.fb+nwr9/ip* qb03 nr w:8c ;xr+sgungth?

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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, wh n.:ubs io *1qtkxh94qat is the peak vqn. tq: 4*bsxk1hui9oalue 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 frequency8wnew;z y- 90zkpww- q 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 ,ek;z lqd y6*la 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 frequenc*dt ()4q.7untwjsvb n9u dwv(y of 7.2 MHzqt7bv4 (junw d9 w)dsv.( *tun?

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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 r2 vsuec8+d3awave 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 frequencyetwxm hq9s (/2 of 20 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 ms g2)bf4.ljho* xx j ;hjlgq t*:1is7rp?

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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 travel 1.0 0qawxv/-xi u5e d )8pmm?

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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 sq k.3 ij4q va3l4ct7t20 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 distancchjn;l8a enve/unac e :1*v;8e 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 kdf6 at-hz4p 7 xer,/creturn as an echo in 20 ms after transmission. How far away is the reflec,r6fadte z7/4pk- hcxting 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 atmkaecg(o3jr6( - y:vv eosphere) at a rate of aboyvrkejc(:(v 3eo -a6gut $1350 \; W/m^{2}$. 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 reait5 mp ;h9is)vsnml2 ,ches the Earth (above the atmosphere) at a rate of aboutm) i;n2i 9sp5,lshmvt $1350 \; W/m^{2}$. 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 vq49nds/tz tf1/3fc6 ba66xx dg-mquthe electric field at a distance 2.5 m from a 100-W l6 gx6 u3tz9s dvfq bafmt 1x6dcnq//4-ight 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 w8 *uif4 nr(y3qq tymf )xi1z+field at a distance 2.5 m from a 100-Wu iy*)q 4ft qfi(z8mwn+r y3x1 light 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 2.0shpy3/ vhyd0md 88dvxzk. ;i5-k2ylc 0 mm in diameter. What is the average (rmsykmvs;cxd8- hdzv liyy8 5dh/2. p30k) 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 isi zr: ic4l81yo the average (rms) value of the i :ioc8zyrl14magnetic 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 7:st b(9e ftxd:y +a8,+ cpz cfbfe7nsa $1.00 \; cm^{2}$ 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 that5wbx- bjf 6kl 7t50 ,4ui tvfnj.vixd3 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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