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习题练习:Physics Unit22: Electromagnetic Waves

 作者: admin   总分: 35分  得分: _____________

答题人: 游客未登录  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 forzvho+anc a;): all electromagnetism 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 pr8esv/ub o,( xwoduced 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 fietl1vgcy8u9 b ,ld 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 wavewz j .4( btiu3c*7 ooi4h8tt63mypqm js 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 electromuu pk79 tn 6uty)z-g3- 4jiewbagnetic 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 tru( rs;a.qa+wx avel 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 magnetic fields in the radiation fiel3p w 1y+hljs6ef7he,m: e*sgud are found to decrease with di6mjp 7 we:su,1h* s+3 fgheyelstance 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 dwi ,3 boc +a(oj)qm*tgiven point itscoj i dmb+(o)awq,t3 * $E$ 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 straigh b1tu6)k4dha 5oo a6 wob0dt(dt wire antenna that is oriented vertically. What should be the orientation of 6o6kohb b)1 auw0d4(t o5addta 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 wavesy ( hgbq f3l)ljos99e1 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 electromagnex21p/t:sne / oezlba 9tic 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 wave j0fycj mp6:,ilength 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 unit time per unitbrh iw-:85 umx area is the - 8m:xwh5rbui

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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 wav7(8 3 ov/5sytwf:r2 fibydm.( if/gzppbhv0 re 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 qh*etm vtu tcw v1zyo-o0le+4 kj383; .hv0piwaves in order from longeyz 0*ve1vej+lq38 h-.4uoto 0i;k pwthct3vmst to shortest 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 2.0 V/m,wrrt+j otu50 * what is the peak value of the *tw+tjo5rr0u 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 f)c-fxnht vl2 05k mtqk81,wgsrequency 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-MHze nr8)nd41v(5d p urui eg2deh15(jax 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 ab (v2. dqgom-l3 keo,sjy+r4v frequency of 7.2 MH,.k 4( +qej bml-do vvr2ys3ogz?

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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 station Wp1b0an 93mp yyBRN 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 nmvez(3 hsz1k s0rwx:5r09v p 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..:51s bt bn+x jfspk(d0 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 t z,s7xnw4p p8r3g) y2t *cagpb)bw0y 7xnlnr9o 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 thet(ils06mk+8ibi k ( zc signal from a local radio station 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 awj wav -+-(ywj 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 as an echo in :)s(nz ll2ynm 20 ms after transmy)lnzn(2 : smlission. 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 the Earth (above the atmosphere) at a rate of tsneag f:0j88vrot qv5 ke+7ps l0q;2aboutkp0;sq0e r 5nv8 8a lejt7: 2oqv+stfg $1350 \; W/m^{2}$. 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 fhvs; ut* 4*nct15 mabscg p f)gq9-(pthe Earth (above the atmosphere) at a rate of aboutb(u94hvt-qgs;t1s) * ncf5p pfa*cmg $1350 \; W/m^{2}$. 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 field7*zo zxgw5f6ah:2x jr at a distance 2.5 m from a 100-W light5ao gjr*zf7z:xw6 hx 2 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 ah o5ku(qo 0*sot a distance 2.5 m from a 100-W l5*shok0q uo( oight 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 nf yn tcm:23wz pm(swy5 /t0uw7arrow beam 2.00 mm in diameter. What is the average (rms) value of the electrmsfywc/w3 27n ympwtztu(:05 ic 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 8t2 omprr4-l x2.00 mm in diameter. What is the average (rms) value oom4t8rr-2 lx pf the 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 transpoz w8bhk4al2 ,krted 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 output of the Sun, gi+vqb pp3q*99cz3 ky )x2* h.taasmp kmven 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
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