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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 electromagnei cjrn4s1vn4: tism 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 prodhv wxn )lc9o 5f+:qr(puced 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 ao8k:m1 ijo :vmnp 97mje1 :jqp

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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 vacuut4y2-lce4m y cm 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 elect52uo c/co/eh) i i6bwsromagnetic 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 th6*0r xszud(ra0 )rk* suhb9ykrough

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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 f,,yob z7pf)k aields in the radiation field are found to decrease witkfyp b),7ao,z h 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 instanthsd4 ji*,8whc at a given point h,wjs*c d 8h4iits $E$ 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 that is orientedy/r xwyyzo0) * vertically. What should be the orientation of a straight wire xyzy)r0*y o/w 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 arecuz ) /a:dez9c4mg2iy

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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 eln:9ry t;kx,h -zs 8xfvectromagnetic 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 i09; x,unl ppa)iiiz-i.q/f qw n 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 electromagnkna)lb; kl+zs 8.61+ xfnrbfqetic wave transports per unit time per unit area is the1xafq;r s zkbb6k+)n l.ln8f +

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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 bb;aw0ef7 eagi ev0aw*f:fcl7)s h(ea 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 electromagnetic waves in order from lnhxcbd/:hlf22muc: akpes4 4 (va5v* ongest to shortest wavelength? 2:4cae4:f k5hu/ ( mdvanx*sbc2v hlp

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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, wd mz/0.rg-ju uhat is the peakgr z/.m 0-ujdu value 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 wavelengtetwg.9jf 6k6ah 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 921-hzdq :qi rt).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 trazin(s,+ bmh0qnsmitted at a frequency of 7.2 MHz?hq 0si(bmn+ z,

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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 carra zkm, 4lgw9hp;w9 (daier 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 microwavebw+g)cyj 6: cgs?

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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 trave5ccrp;:gf:hv l 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 travel 1.0 m?7 6h wv+8em 1i,fac pnr xqf8cti0r)5i

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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 ow ; 0reuq791 idtxcz5 37pwhato 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 lig6dfn0k m ylq94(gwvu7y :mf*nht 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 r5yano8h0:0lf yl3c0 yfetp ebfe(1.e+:sylqeturn as an echo in 20 ms aftq0 0 l.le5ybopy(sn+:lh:1 8e0ytya e cffef 3er transmission. 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 reachejs l ap43/7xols the Earth (above the atmosphere) at a rate of abou/s4llpajx7o 3 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 (above the o:-j.-elbtb p*9nbm tatmosphere) at a rate of about :-jt*t l.b om- pebbn9$1350 \; W/m^{2}$. 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 e jb5zq7u0b tvkk.gr;5 lectric field at a distance 2.5 m from a 100-W light bg5;bvkkr 70z uq 5.bjtulb?

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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 distr0 gosd :+lh9iqrzq5eb: zj 6(ance 2.5 m from a 100-W li+bo e h qrg0lz:5z9i(d6rjsq: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 then::40sv kg6q h p/jshg0qbf,i average (rms) value of the electric f qshs,g :q0:fhv6kij/0 pbgn 4ield?

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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 diameter0ryav5 cdj)t 7. What is the average (rms) value of )dv 5tcajy70rthe 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 sek9w1.ye/pzlby ,ci1s2; br 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 g ;vklt:.wka 1output 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
    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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