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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 elect fmlw3vb*-p,u afhf8. okct25romagnetism 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 produc qtmv66 smf5mbo,*yl/r)5zjn++a cb ped 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 h0cw;iv gl26n psc(p2 field will 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 waves travel through a vacuu8oq*zzb6r u *p wgr 9/) p2k7dmjbfl/gm 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 electromagfz*3x rj0br 8unetic 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 throu8v25d5(m hgwmq 7 7zfpow mpj3xgm9,pgh

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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 ineegd0 d8p pim qh0*n5f(2 8bsm the radiation field are found to decr5ppb 8mnsem0 d2qg8i(edf0*h ease 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. Atb avt7ps* f19 13:,wghf(fg(txid oiq one instant at a given point it b*(, iv o hgfp1ds3ifftawt9gqx(:17s $E$ 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 su2z bw crc.en 2bav*n*m( (imz*d95y3ph2ep radiated by a straight wire antenna that is oriented vertically. What should be the o sen*3ap imhb re5n2dc(mw(zy92c upb*vz2. *rientation 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 zd/4feg. r9zb4ndc g.36ses0p-aplkare

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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 electromagn, z. avnex3am*- 1iuqe9n;d dbetic 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 wavelengtoxqm: 5m46u3gl q.c udh 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 electromagnetice)i ; a*jqzl3i wave transports per unit time per unit area is the l i3q*iea)z;j

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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 electromyd jm0vcob+ xq+b8,k)agnetic 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 /0 ij;jedd9:9t hg gctlongest to sho g/9t;chdi9 detj0gj :rtest wavelength?

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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 2.0sb v.:nfy*h(4fmz-bj V/m, what is the peak value of t (fvzms*-fy .hnj 4:bbhe 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 .wcsjfs 7e(q)heir 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 r, fm/1eerbcy ok3 nr(-adio 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 7.uw( 8 mvnyrfnjo 4uc26q:(fm 5;qnqz j4 z:y1m2 MHm4:o4(qnnv 86j:u y1f;yq mn2w( mc z5zjrquf 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 thenyv0.a fb pcaf6g6a 9qb9. -ha 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 micv9 6dhvcxjq1) rowaves?

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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 trave4gfj hs(,de+ 4l0myc ll 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?gln 4 ied+4e0(h(kepcpmc k ;5

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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 20 mil9dr0 ,rnhfrp7es?

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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 (the13kat +k 5s)8lm nctnu distance 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 indi e g1kjsxull5ddhn2b x/tz,/k111 6odcates that a transmitted pulse return as an echo in 20 ms afted1e/bdz11 uos1 tk /56hx,jgd kn2 xllr 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 reap*jv( dsw; uu.ches the Earth (above the atmosphere) at a rate of about w vupj(.u*;d s$1350 \; W/m^{2}$. 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 reacley)uzn0 snb.cq6m. z8hzral( :8*v90 wle fmhes the Earth (above the atmosphere) at a rate of abo9:.hl nmu)e6 *s0 ce80(ynz rml8zbv.a zwflqut $1350 \; W/m^{2}$. 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 distance 2.5 m from a 100-Wbc3 z2rg-jc oxmtmh:* h.6d0 h light bulb?t-h3 mh o 26r0*h.c:zxmgjcbd

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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 vwi9b-l 9;m4ha7kp :sbuw y4lr i d+6tmalue of the magnetic field at a distance 2.5 m from a 100-W light p 74wuhkal 9m rtbis6;blwi:+4ymd9-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,pw:j652krj-z c nu(pxom o3w the average (rms) value of the electric field rp x2(oj:wkpu3zmw6,co 5-nj ?

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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 bea l25m9 9ku1*shtt hmnim 2.00 mm in diameter. What is the average (rms) value of the magne n92 m th*m95tilu1shktic 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 transp)z4n : gtrc6ke0vugb.orted 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 powerlc kt7mj+3t7w 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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