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习题练习:Physics Unit22: Electromagnetic Waves



 作者: admin   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 developed bya60 3qv 2bk.)mitqiuyh:un q-dkh..u

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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 pro(ba 5x yhj.gh;jj;wuv 0nqr*. duced 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 pr/b vxd+gqszn,cl::* l oduce a

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic w do ,2kih z2n6,g0j41xbj+oq.tlxocwaves 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 of all electromagnetic wavesxm 4 til,ahs(9

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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 throughe gg0i o)uo qa7.0b. l6t4iiux

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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 radiation fiel*),od53v2o ymeq po d rume9.gd are found to decrease with distdpm5moo e2u .q3y9rv ,d*)o egance 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 1 ztee(*zck;tthe east. At one instant at a given point it *1(cezkz;e tts $E$ 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 wi5-1s cir;oxgzre antenna that is oriented vertically. What should c r-xsog;z5i 1be the orientation 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 wavemm; dw tvm3-s525topu 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 electromagnetic inrf k 0od()ti*n 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 wavmnzq;s(t9:l yelength 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 j,w biko -6wi*unit time per unit area is the6 jwii*ow,bk-

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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 wkv; dk(h n 1*h2kq-q;dj:(xkcb1ff a zave 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 ej u y*;*u4dlxi g-0usnlectromagnetic waves in order from longest to shortest wavelength?dil -ynx us**u; guj40

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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 hw7 u ,mh tkl/0k;2hswEM wave has a peak value of 2.0 V/m, what is the peak vaw7 t0h2h/mkl, shk; wulue 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 t ssna.6eon9r.gyt 2l; lh0q2 fheir 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 rn 39bm(y-jksladio 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 a7vf fwf j((9rmt a frequency of 7.2 MHzwf9ff m(j(7 vr?

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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 sta/pef /.p r+ jjwe1l5dntion 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 k.ke yd/gdu-/ 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 m6 8c jcgdr7 ,gfv6.ctfs?

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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 ty35s yhja hw* xqi+3l: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 radio c2)v p lcegt68qe f76tstation 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 , f 66bd iu85of.l qdar4n9iffa 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 t kgpyq)wq0m8p3lz* *,tgv- xshat a transmitted pulse return as an echo in 20 ms after transmissip03tp )kgg sym8, qx*z-wl*qvon. 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 thea :r a;1:z+p4 hercbih Earth (above the atmosphere) at a rate of abo er1bhri4aa +;hpzc:: ut $1350 \; W/m^{2}$. 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 (98qx6j1wzmjvg (7 m3r7jnc8bbwy (muabove the atmosphere) at a rate of about3v9ymjnxwcmu(jr7gb 78(wm1jz6b 8 q $1350 \; W/m^{2}$. 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 ez)/0:fg3 xgdh; ufablectric field at a distance 2.5 m from a 100-Wb0f:d /ugfghx); ea3z 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 8ub smp+di ep*;m4w :qa 100-W ligebu+pm*:m; 4q8wps idht 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 the -03kpxg7uti k6io1piaverage (rms) value of the electric field0ukgo1t-pii 6 ki3px7 ?

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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 2.0e0 5h s:jaha7a0 mm in diameter. What is the average (rms) value of the magne5hasa ae70:jh tic 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 tran vpzz6x bsew*2p tbdj u.l2(.*sported 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 outpelylr2*tmyldr ,ge 1/5y- u1 nut 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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