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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 electro b7*5gc6fft ju-wnbn7:oja: amagnetism 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 pr5j).z h ; 3puy *uod5rhb wrqg97z l+kb6/amzooduced 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 field wi .v;dyii9gv .bll 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 31 wt;x+lcsksd9 sg5 ja 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 electromagnetmpb ,g va)6+nmic 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 traveb2r 299bivwgcd vi 0j*(l:mvml 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 field ax i9h,ml72bu)ua6s j dre found to decrease with distaumuh j xl97db a6)s2,ince 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. Att9opgtn-, ioe:tq v )* one instant at a given pointt)ove n i*t-g,tp q:9o 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 is radiated by a straight wirlldb k;fik cy1; ..ug2e antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It should be pk2 ldf lk1i c;gyb.u;.laced

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves ayw 8cu 07-g7jhkh:e epre

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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 natuc)8tpz ms4s5k pjr*q/4 enn qpm8e0h0p+v nv*re?

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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 wavno4 i h9gzzfltbl51y/ip+1t:n*8 iitelength 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 area is th/q:/7clcj o0:hpxowzeq c xo0o:pj/7:w/zl ch

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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 electromagnetl3 2dhp e4;bj pruo79tic 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 followingqp rdy8 *l;4 n/kqo9dg correctly lists electromagnetic waves in order from longest to shortest 9q8o ykrg/d4*pdl;nqwavelength?

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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, wh ;hjl:/g+s dxagzw(x2 at is the peak value of the magnetic fieg(;+z/2 hg :xxj laswdld?

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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 th)rt:lcgh5 r,w eir 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 o27pt 1d(.atj; 5vmw z ggk5z(5ivh yjmf 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 ad:r)* thvr)wg ztov-c1/+xlft a frequency of 7.2 M1)- v)xt /:rz+o*wfcg tl vdrhHz?

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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 waw2zemdsj-f *r r. ef1/ve 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+m g4.xwk*gpg o(xel; of 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;+ bfe-rnc x3z.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 h w8afwzmi949tt) u (flight 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 radio sta )tbt-ud2.ljxqoa 09ktion 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 year)?-t fw4 kk8evf1

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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 trans tw(g qa;) pu8m)/lmtxx d8uevt+1f4imitted pulse return as an echo in 20 ms after transmission. How far away is the reflecting object /uvmxa14(t w meu+g)l d8qx8 p);tfit?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Radiation from the Su 3 v+tgvlek;a)jd6vn;y s1o 0ln reaches the Earth (above the atmosphere) at a rate of abou0;v6a );y+l3 nvtlsvk1jgod et $1350 \; W/m^{2}$. 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 t*hghy5orq/ate5 5wf7 int bsn751c 8 dhe atmosphere) at a rate of abothdn7 5o75a qbwy85 c *tsn1e5f/ hrgiut $1350 \; W/m^{2}$. 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*l64 xq8meh9 aw arspl6 j3jd6n12lfi 2.5 m from a 100-W lightmll213ajs6 x4* fwj8qr d6elai9p nh 6 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+(0 o8(l,fzvol(evzn p b3lr c of the magnetic field at a distance 2.5 m from a 100-W , (l(lpez cbo rov(+nlv3z0 f8light 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 diamets4s l6b,m( x+y2p 2 heqzy.nhber. What is the average (rm.s qlzen2sh, xh(4yp26 bb+ym s) value 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 beam 2.00 mm in diameter. u8hnlf/.;6d 8ux*ls6dh jwedo)2o:ml;emk t What is the average (rms) valu; ) j.xmo6sfwm 8 d;d hlu6*ounelkdh/te2:8le 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 tran1 f-ak cw)ohy,3l3j rasported 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..e5 5irrp rhd power 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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