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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 developedd,vrfj 8un4pco0/ t;c 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 prod1 4 ;w oe)wotxqfy:9teuced 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 will produce -b,owtq1wk/v 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 vacuum at cmleha :8iu/9c4acsdi36r,y

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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 electromagnetic)t*z 6o v,crn4j vykx+ waves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves czg-a*s mzqm5yf*xqr 5t0 k6lt2q- .u vd*7stvan 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 electric and magnetic fields in the radiation fixe8r8 dtl:t c2j 7tybbq* bj)ccj0.x6eld are found to decrease with djcxqyb6d7*b8c: t 8tbljtj.2e)r 0x cistance 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 ack 3 .2e +t9nkkidukz .yi0;wzt a given poi twz+u0cy9.knike; k32dk .z 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 is radiated by a straight wi51ggpapbj/ k7 re antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It should be pp1 g/pa7gj5b klaced

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves l;*- 0illd teiap, q;,kjzt ;zare

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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 ele+vzp3o5*k( es8 z x6 qu 3rz,cohkgc3ectromagnetic 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/ z 5rl+rgz5yg ,lvc6u 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 traizd)v0 wf3n+pl t 8+cqnsports per unit time per unit area is the 0p8 3iw)qldv nz+tc+f

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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 by0;sg oedu jgk+4k,b(a an 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 electr*e1:htgvre y;:x .cqq omagnetic waves in order from longest to shortest wavelength?qxh1 c: :eygvt*.eq; r

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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 ;llnlxt5 h sb. hysqr:o qc/q5x,2h85 value of 2.0 V/m, what is the peak value of the magnetic fieq/l,t;.xqohr 2qh n5sxh5bsy:c5 l 8lld?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength8iy4(jyqkq gl*lx.y: of light 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 wavelength of a 92.9-MHz radio wa4.k,4p3qo eb,f7z n ct7y*n*ayi fa wtve?

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelenght 29.jljduq7 th of a radio wave signal transmitted at a frequency of 7.2 MHz?lq 7tjj9 h2ud.

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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 th g4kw 3rw82mjwzpm jt;13 si3he carrier 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 of 20 mm microwaves fci2q,t5zp*e9w+dl8g hd7r c?

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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 idq0ns:+hu3 y1rkou q(9r mce4 +vb(kln 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 trf h;nf+y)0myux.vlz )v8s9ysavel 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 s j/-ts8igin ds7x- y3wignal 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 light uy01f-cm cves4 +*u0mkpzv j(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 indicatest0ek-wfh*9 fgaw54 m w)rxo ehp+c*u; that a transmitted pulse return as an echo in 20 ms after transmission. How far away;4hmrof09ghtuf* xww ea)ce *5 k+ -wp 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 ratee v7+bwsoo e2pbiu05; of abobe 0be+is po5w7 v;o2uut $1350 \; W/m^{2}$. 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 aboo9 8ey-tgapx(jn7(v1)0ehx(uhvk cnuej-ug( athknv 7(e h()v x18op9 n0cyxt $1350 \; W/m^{2}$. 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 electrik grzxb djl1.af;2-,c0a3s ikc field at a distance 2.5 m from a 100-W lc,kag-sri 01d3lfxk; a. bj2 zight 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 u *nk1qs)v(jkrjf3,s a0/x wg2zlt.yhe magnetic field at a distance 2.5 m from a 100-W light bu fs(wny* r.k0/sj,t)u lz1 2gx3avjkqlb?

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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 narryi)* oi5;f2xm(rhqn6b 2 mcuwow beam 2.00 mm in diameter. What is the average (rms) value of th wy5q;m * )cix ior2hf26(munbe 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 diametjc,un i w5jm,1er. What is the average (rms) valmj,u1icw , nj5ue 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 traah 2,. (u o-sxy9ph zcrjxu7f;99iian nsported 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, g b84r7,c*rp rk(m0pfmgxr +vmiven 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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