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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 electe5,w 2czt(lq re7sqq8romagnetism 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 produc*bkl,y:f) zsum c.fw7ed 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 produca f/m u6k/i7cue a

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic wa.zg w,a +/td( awupd7wves 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 velocitypr:uv4(*ob i4-umemt of all electromagnetic 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 travel5z,t c x,txd:n 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 fiel t6 (n.zsv g(7jxniupfp9 31rpd are found to decrenz1 t76gifnr.px( v(u9pj s3 pase 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 instclub k0lrrn-+;zqj 0jed0bjf:1s j 04ant at a given point its r nb0jz10j0c+jd4b eks ru-:l 0lf;qj$E$ 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 wiren*txr(ri /we 8u4v(bk antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It shour/ku 8x i(*4vw( nbterld 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 arey2dw 4 yka+wep6d;z 9a

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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 :(vk 5 *d/kt d52wlyf1ussyjgnot 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 wav9xszaqtb;w +3stjapku3 c9 w63n3 l:ielength 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 unitikq/r lk 777nq time per unit area is thenliqr/qk7 7 k7

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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 bx)vg3nwo; a j6y 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 correctlzy e8po c/0c 52q7ssb7l bzhr/y lists electromagnetic waves in order from longest toqhe8rp/z 0 b lc2ys77ozsc5b/ 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/f.m 1::zw8zrka,egu r oxg0j0m, what is the peak value of the mz:j r1ar m:0u ow.ef80xzg,g kagnetic 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 lig*i q1l xqo0 nrulxj293l+a ss+ht 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 oq51/y5sr ws (qf; q-ci i(nhbqplxtsh3e;d0/f 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 wavelengthybki1kdghw- l od:8 :4.gw.pu of a radio wave signal transmitted at a frequency of 7.2 MHww8u. y.-4 kdbg gh:d1lk:pioz?

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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 wasxg vq rj0.,m,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 wl7 m t1mbnadc8 p(p;3of 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 traveyq.pn42mkyc f,5qg8lw7 s s:a l 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 tz (ji 7,ol9clmravel 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 taken q:bih*;zj:spq8 :bd the signal 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 (t+b(d m ijksv+*he 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 in 2v(xx n184pw 8; hf i8na7ekkfq0 ms after transmission. How far away is8x8wkx;h nq kae 71f(p 4n8fiv 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*ks,qmk*f3/ jb6ze-v v/wct ;(xbbwy Earth (above the atmosphere) at a rate of about /qvkstkw/,;(6v*mx3 bef-zy w*cb jb$1350 \; W/m^{2}$. 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 atmosphg b.*y6v ekd9were) at a rate of about9bv* w.dy 6gek $1350 \; W/m^{2}$. 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 2.5 m from a 100 f)wtinohr;z 4(06n3;ji cko j drt(:s-W light bulbr:ih 3n w (cd;r0o(zjnjkstt;6 fi4)o?

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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 xw.;(.s i0iaicfu, pcu0v:x*tlpds 1 magnetic field at a distance 2.5 m from a 100-W light b.:s.l(*0 v cdfxp,1iput0x i sac;wiuulb?

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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 2.0 8f*zq0/lkbkob zwmqt c6us6.8xqw2ly y :f630 mm in diameter. What is the average (rms) value mc*w66:6x2llyqq. zk0 /b8 zyqfbw3k8fs out 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. Whatinw* yb9mo -bi1y;v3y is the average (rms) va yby 3in*v w1b-y9o;imlue 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 transporteys. uf:a.u ;asnvnj4w p ti.tr/ 13n2dd 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 o 9ij 5ju ;verbzuz:1y5vt+0cnutput 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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