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习题练习:Physics Unit22: Electromagnetic Waves



 作者: physics   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 al ln,. hkjd/ ,nkc9k;arl 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 produced by + x8.q0/ om lph:spypca(.bn0 ckc1 qda

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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 w8o .)p.hrrl .3n 1axfy+hjcxl ill 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 waveseu;,0ztv ag t7vx ,a-q 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 elefw co)2bd 8)fuctromagnetic waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves ca 3ebpyu2f hzsjss6.h+2jzi 2g98v) r an 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 ele;: lsifw rf2t7c)ff3 ictric and magnetic fields in the radiation field are found to decrease with di2 fiw3f7cf ir:tlf;s) stance 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 insta:82o7q:zk,evxifc b8 ozy l 0znt at a given point itsb fc08v z2:y oxk,:q8z7i zoel $E$ 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 )sl td9x /u.i o(.zjzbwire antenna that is oriented vertically. What shoul)i .(jsuxz . dto/b9zld be the orientation 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 wavesg;dn cex (0riviukz :x/hz569 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 electromagnetic in nature?v oo1oy7+4wpt dkdw- c9pt-w,

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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 wavelengnrxx vgt,(*co m 74rnt0+n4uq th 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 electromagneti 3naagfz2u 0(yc wave transports per unit time per unit area is thea(03fanug y 2z

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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 wav2wi0 s7q4df -dncvq2pe 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 electromagnet1 s-lzg +d1zve)d .kmpic waves in order from longest to shortest wavell.dkg)z+v1de1p- s mzength?

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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 the pe9(hsop30fv l vak vavho3v(9p l0f slue 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 waves if theix 9pv4/qjfycs l0o9z (r 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 radr* fwvfy;;;p nr;ptn3 io 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 wa3-1f6taa vp ys.4 pysj uhm09kve signal transmitted at a frequency of 7.2 MHz?yk- spa36m9vsa 1 4h.0futpjy

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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 ca e 19s0(nsurw,o2 dkewrrier 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 or5 ,b cvc0j*bvnki3e8 f 20 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 1.0 msp + a6. vd+ffbmtaj-/w w0bj4m?

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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 lisw+nfbdg lthdxlwb 5t*)jy.*s ,v sz*-//7 h xght to 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 local*x f4i *0v5w/dj o:qm2uam keh 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 distanco h+d m5i+jjh4e 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 echoas ps+/ 1a 4lmreatb8rrm-)d* in 20 ms after transmissionr1/8 4aemab da*-srtl +mprs). 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 o(lg7dhmoyv : 4f about d:l4yg(v m7ho $1350 \; W/m^{2}$. 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 rate of abow.lp j /p q ba;do*jwqhve6*,1upw;pd.*jwvl6j b1*oheq aq/,t $1350 \; W/m^{2}$. 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 di o86/hgv;ilw sstance 2.5 m from a 100-W livlws ;8gh/6 oight 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 mfm6 -97 8fdhm;asyi.0eydoe a agnetic field at a distance 2.5 m from a 100-W lig- hid9y0f7. meay eas 86of;dmht 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 the averain3 *o:ff p4cxge (rms) vn*43c:xofip falue 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 og(lqfky.) jl +dx6 +*lw rdfx7ut a narrow beam 2.00 mm in diameter. What is the average () +lffgj .k(dyd lxq+ wx7*lr6rms) 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 acroicb/h.m (kv:c ss 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 outp*-w0o76bbex hl sk,j tut 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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  • :
  • 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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