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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 electromagnetiw-4vfuo l/x,b+ c2d xg3:xgzqsm 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 prodozn y;h1k c,9tuced 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 fiebdn f:m)e5a d1ld 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 vacu f ev:nvt2rpkdw3h/h;q.) .uu um 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 e;qhyklmv2 68wkv8k :w lectromagnetic 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 tra,5qy k)y5qej hvel 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 mahe8 x,, jqg3na569digy gbkv7gnetic fields in the radiation field are found tob,6dn,ai j hq3y8x95gkgve g7 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 aw. fl:l y1j3ny given point it: nl1 lwfy3y.js $E$ 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 waiph2 a) jvfn2,ve is radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antennapa2) 2 fjnhv,i? 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 r-diti ,lm(2uare

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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 e 2s)tywi ,kl7klectromagnetic 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 wa,01dn12 gpv o *fqsltovelength 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 tu(5 .9tfr 3zzx,vvz rpransports per unit time per unit area is thev(pfz ,3vz.xtrz9 5 ru

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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 calledts f,d -,drgd* 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 lon-spz q a2wt0erd6(s4w gest topwqs6dewzsr( 4 at-02 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, what is the30 tu dik3-icc peak value of 0 ck-t3ui 3icdthe 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 lighji (oj:8 ir(2jb : kqlynavr8-t.f7det waves 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 waveleng +k(o*r1pj bh5vq8awzth of 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 frequqx.3 kq5*ca9gvwart2 ency of 7.2 .r*2t 5vqc9 kwqx gaa3MHz?

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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 wa uk/gjka(tj ;g rn3rt /l20df2ve 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 j qt9yv3(uw5d20 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 travros js49es f(lyg u84+el 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 9u:+iz ,rgr ;ino0jtvtravel 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 ry j.b9+bt 17 :gpbp9jfxm)2 e9 nhcufmadio 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 d2g,21tnhr,0.rdu ywzs u5ee 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 indicates that a transmitted pulse return as an echo in8,l3oojhy ; ez 20 ms after transmission. How far away is the reflectin,je8olh; 3y zog 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 q*xx 5-pv ezdjw7xa -2atmosphere) at a rate of abo-5zxqxv* exd p-72a wjut $1350 \; W/m^{2}$. 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 atjtq kq3lbc qp+bc/ 8a1b.1nb8 izj05qmosphere) at a rate of abo.q 8jb+lz 3tc/q1qb5j80inbp ak1cb qut $1350 \; W/m^{2}$. 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 distancsyd+6s7e5 pq 2krhqh)8 z xqqhpg1 8o.e 2.5 m from a 100-W light bulb?q1 poxp+s. 5 )8hys78qqehq6hkr zdg 2

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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 distance 2py c 5-q2kho)b.5 m from a 100-W light bulh obq -)5ycpk2b?

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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 bea u iltauq 02(6be;5fv8 d.lhovm 2.00 mm in diameter. What is the average (rms) value6ho(f;2.v8ieq 0v 5tlbu luda of 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 bea0maksw2 ax xdq40*( p16h3 nwsyx ozm-m 2.00 mm in diameter. What is the average (rms)zsq wnsap06 (o hx23x -y4wam 0*d1kmx value of 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 transported across a cvbh2) au y yllv8(glvd*/j 4y7,2uff$1.00 \; cm^{2}$ 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 8xd e zb x97ve) p7ea0pyq8c.bpower 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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