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习题练习:Physics Unit22: Electromagnetic Waves

 作者: physics   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 for all electr9 sf+m7(po3h9 7yy5*bzuvj9 sntnt uh omagnetism 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 produced by ghuym2 -gxe*do8i.vvw-gc q 9;s w7+ ma

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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 willnfa rpb8t5wt hu,; bgq).4 *jm 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 trave 2mg y(dxk47efl 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 electromagnet37 t ex3o/6z*k5jcwfhq: kc+zhigp/l ic 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 s(fq;dt+lf 5g 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 electri hsqf d,xghsljl:: gen:*3t(*c and magnetic fields in the radiation field are found to decr g:* : *jnxd3slhq(thef:sl ,gease 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 travelingk6 d.i8 hi xmk,s8olm4 to the east. At one instant at a given point its 8 h4dxk8 s,mkil6im.o$E$ 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 wire antenna thardxo pn1;g2ut dqs4pw(ui/7 1t is oriented vertically. What should be the orientation of a straight wire receivin/t (7udnoi2p1w1g4;rspqu x dg 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 areo7ow y9y(9sjo

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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 ). 6+ah zrgg pfjk+4q1exb6ff electromagnetic 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 wavelength juvc2im 1 yei2- gaf +j87ek,bfrom

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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 areqv cxupa- y -8t)(wy(na is the px)yvuy- qwct(a- (8n

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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 isybcun.kpf; sjwn*ut w) *g750 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 ordf-e +0in 8vihzqc y7f*dco6v.er from longee8iy ih-oz0c .c*+7fnvdqv6 fst 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 o/sdb (er :+ gde:uo(.s-lr,1h nsxvh in an EM wave has a peak value of 2.0 V/m, what is the peak value of the magnetic fielbrh(l:h-d (1+eesou: .rdgs,sxon v/d?

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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 if4yf+zczt .9z1jetxpo w ce .89 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-u5bu -perw1 63nkoq,1vwz p e0MHz 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 x47 wzb-z3ceo vwi7/g 5yiip9radio wave signal transmitted at a frequency of 7.2 e9c i/3vwgow7x pz7zi 4yib5-MHz?

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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 WBRN 1*5 tgrvt06zq6(yl v jk460?

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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 microwavesp ja++3;/ vir cvltqkhp /0g,z?

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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 trta9o2 spoc/vep:, lr +avel 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 o c1urt z9.yf(7-jrlyzt+m k+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 signaxj p/8bcdq(3 hl 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 lightb+v8bv2hls,s4/ rmwtg j se +i1jk0:joeo) -o 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 indicates that a transmitted pulse return as an echo inxvi5+ m na8vh29+sut2ezll8sfn /td3n h5y1j 20 ms after transmission. How far away is the reflecting o+ 1d v8lvnhs8/3+izntj52h fnum9aey t5lsx2bject?

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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 thuo+0vu 2 oks(it.:t- jmqnk/m e atmosphere) at a rate of abo-sv0um2+ uk(i/okq:m t.nt j out $1350 \; W/m^{2}$. 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 atmosphere) at a r/ yvov mx w(k4o2fe0,vate of about fo, m2/e40v(oxkw vvy$1350 \; W/m^{2}$. 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 2v6 ;v8nval8u roma, xe13x f,o.5 m from a 100-W ligaex8o v6; x8 uvm,3n ,1raofvlht 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 t.tr1 vxtw74 5apbi hw1 .m7kdehe magnetic field at a distance 2.5 m from a 100-W lightb4e7v17tkwm xwat pr5.id1 .h 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 diaas8h-sz u;w , zbx5 qz/liy8,jmeter. What is the average (rms) value of the electric fieldq;,ua-wy/i h88,sb zl5s zzjx ?

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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 narroyp+ 0zg)53 npwbsui( uf6 h1jbw beam 2.00 mm in diameter. What is the average (rms) value of the magnetic fi p3nu5gwb sh f6(pyiz+1)0b ujeld?

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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+ ltb-)xazr(g 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, h5si p 9w8:es5j:9zpnvr*qo jgiven 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
未答题: 已答题:0 答错题:
当前第 题,此次习题练习共有 35 道题

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