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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 by*8 8qr.u ylzfn

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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 pryg dj /xiq:icr20nft6* 8 nl/foduced 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 fifh8z hq 4x 6 nbm43egq3ggw:jd)fp7x/ eld 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 through1 )cs (8g i4qbsz*npmg 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 electromap0k87: d8aeqmrby ig202ysp ngnetic 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 tlx.2vej7undrbr d 502hrough

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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 fie- yofa)prv65rfovzxo 1b a/5,5bad (sld are 5obx-6fvp5r ysfroda/5a,o1a( vz b)found to 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. snisgl i7a(3*At one instant at a given poi3nla* 7iss(g int its $E$ 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 i;y,t mn. il-yy dsr:6qs radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It should be y6; myln,t-yqr:is d.placed

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves ar7 yfe4dk-x ew+suj+/,e8zrt je

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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 electromagsq4afio tf74lk2**p jnetic 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 wat-- 5fwed6i 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 electromagnetic wave transports per unit time per unit ar(y/un)g3jquhw .j8nj ea is the 3/n8 n(h)g.jujyj uqw

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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 euo; jf j1fw-03 c 39envh gqc,pj1-tean 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 lonb(v(zw xglh3tpl: 2a/; pt-9j 9rbewdgest to sht9epbj: btl w/gzp;9h adxwv lr((-3 2ortest 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 valix(de80qnhod3t k 0p2 y -. 9yrwtcfh+ue of 2.0 V/m, what is the peaex2d ryk+0(0y h. 8f9-dtinw3p qotchk 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 wavelength of light wavesn8prcul /)m 1zb km8p6 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 92.9-M49* f4v,ds/jjcekz mpHz 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 7heras16r6- d c:va 3ch.2 MHza ac 1vr-:re6h3c h6ds?

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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 ./chh e*m i:rjWBRN 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 m r slckfu ky3fyz*/-cgnw4..6icrowaves?

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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 tr uei;4 m+5atqoavel 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 /, vztuox8 6wjto 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 locw6qaox im2 x1q3*xet7 al 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 a yea + y lf 85tm5g4voe(f,e6fupowr)?

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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 i 1l vf,e wbkayp873mb4n 20 ms after transmission. How far away is the reflecting object43ve lw7 1fpb ,abk8my?

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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 (abovg9 l1ckui15yjw f 3)zce the atmosphere) at a rate of about 1kz)fcg3y9 uc5 jiwl 1$1350 \; W/m^{2}$. 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 thez) 9rn* +tamrnqvk g57 atmosphere) at a rate of abo*rkgn)mqv +7r9at n 5zut $1350 \; W/m^{2}$. 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 n*s du-5ro,f5 yvtfkekk b5f5rd7w:l *+;bkna 100-W light bu5w;lrk dvrsfd bko,*+75 ykuft 5-bk*ne: 5fnlb?

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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 disoq2) qhe z3ap9lie+++*ajcio tance 2.5 m from a 100-W 2colaz+o +e3*i p9+ihae)jq q 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 diameter. What is th/ c,toaaw *23kv),dg ) scn+k.xddoree average (rms) value of the electri) e o+3/dk 2 kxtvwac. cd*,,agso)drnc 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 nzq6e -0c +fkxtw.sfp/p+)jrzarrow beam 2.00 mm in diameter. What is the average (rms) value of the magnetic fieffzt6 z /qse c)krppj-.+ x0+wld?

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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 a l) yycm99 j8px$1.00 \; cm^{2}$ 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 jj 8zh50/ol4tdq8pkhcp b*i 5the 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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