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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 electromagc-brm ujfx;ae6 m*x5ws5y3/ mnetism 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 pvz :oxg 8m b,;f2mzm9nroduced 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 * 20/d imcba6b s7po pg6opuo9a

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic waves trc7vs akpc+*r/nbv 4a:avel 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 watc*vsbih0v81.o uw x,ves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves mkodgr+f(krw4/;8l1g 7 v;n rs3koj ycan 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 magnetiootl;8agm yr.:0a2cac fields in the radiation field are found to r 0t oa lm.:y2cgoa8a;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 to the east. At one instant at a given qvmpca /v+ml r -.v2*lglnk7;point il qvr lmnm-/+*.; v 7klcpva2gts $E$ 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 radiat yf n3vw5-zwk.la 2 .f+cw/oxned by a straight wire antenna that is oriented vertically. What should be the orientation of a strai wlca.k3zww.n2+ffx-5 n/oyv ght 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 am 8 3gs8bmjlkvsmb )x66qqx,z0;v8fi 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, which is not electromagnetic in nd 9ft,(b,qeinature?

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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 i6(z;dg1 qx rsejws :x;u*i6lavelength 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 8szkf/ 1hi5 kq(e 40 zzmnk:wrunit time per unit area is theq 8f/ :(0ez5mzhkn z4kw1ks ir

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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 wave is called themv.e q(e-nf-ea b xr8y,+h9 ;/d.kc7vyyhbzc

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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 cp ajqgz 0t9oc6 +8nq0uorrectly lists electromagnetic waves in order from longest to shortest wave6unzc +t0ja0 goq98p qlength?

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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, wha.5 7 ytr 9b cm-ejw*6rxl5tzvxt is the peak vr5yw*l5c zxr. 79vm-xtj 6e btalue 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 frequency uu ( 4i(pgo;hjis $5.0 \times 10^{14} \; Hz$?

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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 ogy9k)3hgp2tof a 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 frequency of 2f3sigxme 8dvx(5o* n7.2 Mn2e fx5 (v8xi3*o dsmgHz?

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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 kf cbb-n8d e/m+v7bb6 the carrier 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 microw0-rld1odoq; )4 ls msraves?

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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 -0bv43bfm(l;u uw+9tclzw;1j ag ti xrs.i8e?

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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 li fbqa d7ax,9 l6.c;tbbuvp qg*yi 8t.(ght 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 signal from a local radio station to travel 20mamcp r0.5eo* 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--cg)fc,/l ylcye.n 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 return asq;gpb+v r3g5m an echo in 20 ms after transmission. How far away is the r b5rgv3gpq+; meflecting 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 (abovhu.xb 1x0; aa 5qtn7w cu,j:y pear0q1e the atmosphere) at a rate of about:j.0 au 0,wh 1uy5ctn7q1x;rqaexbpa $1350 \; W/m^{2}$. 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 atmizz u 4t15uss)osphere) at a rate of about zsu u i)154szt$1350 \; W/m^{2}$. 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 at a /-zso 3xn83 yiob*:cz 2sjtn8dwo t6 adistance 2.5 m from a 100-W light bu6wa:oy3 z -83tis tjc bdzonx/n8o*s2lb?

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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 vn/ )jon8h*3hicj1vn k alue of the magnetic field at a distance 2.5 m from a 100-W1h3*8n/nkcj o)hjvi n 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 2.00 mm in diamzuv 9sb1n(v3reter. What is the average (rms) value v z19snu(rb 3vof 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 o4y6k og ei+ e4(qr)vs owo;q9in diameter. What is the average (rms) value of t(9 oev;yer s )iwo q6qk+go44ohe 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 ac(oruz u7tdm0,;5 ibecross 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 tj5 7kr2/vcov xynz1 7output 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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