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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 electromagne8ntjquwk 2 ,;ptism 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 p :wev2 fse5az.-p)g ww) h9rtqroduced 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)iov fai8pt3 2 kkj1.x 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 a8i9 ai6)4ounszu lf; 5 uzam.jt

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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 wavpzas.eqz+f 81wrg.0l es

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves w:zc+b u8vk vu-rl7 3gcan 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 electr3jjm jyp (9bvlb)9n,f7 2vcjbic and magnetic fields in the radiation field are found to decrc( y v,m29vjfn)9bjj pjbl3b7ease 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 onexb,fceilrv7u /z +n5iw j,2-l instant at a given point x nzlb7ufrj/,,l+52vc -e iwiits $E$ 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 byv+3rk-esfs (b2,k enu a straight wire antenna that is oriented vertically. What should be the orientat( es rks3un+f,b-2vek ion 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 waves a t(-pv l-cpx *kwbbn y+*wr25ere

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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 electromagn/ir28w5x0v o r2efmn joihw74etic 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 edij.t.a(a f )z-ak) sin 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 transports per unit time pe3vx 0h/jtvlec8 g,ks(r unit area is thes0(k/xlv,tev jch3g 8

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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 wavec zm9b(6 v5 idoj/g.fx 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 lb4el/m/3lckelectromagnetic waves in order from longest to shortest wavelen /3/m clkebll4gth?

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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 4xu.vv -ggykgr3rk)9 in an EM wave has a peak value of 2.0 V/m, what is the peak value-g vv k)kgx94 y3u.grr 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 their frequency ia5ajl/8nb ,dx0*e 9qb gbai)ls $5.0 \times 10^{14} \; Hz$?

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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+lhlfy.8jon 3th 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 signae:xllpgzlvd k rarn699 5(,9wl transmitted at a frequency of 7.2 Mrplvl9 9kden:zx9r g(lw,a5 6 Hz?

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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 wave in the stati 0 tn n mu0pmt.:ki/bjp ;ehb)bngif54:j(- yeon 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 k oo4cm;/j b9njmf 5//8dy y8masuwz,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 2k4fu. p-rzpr2ka7j f 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 tak;0wty,u;iyvjp kg,f )fz/xi+ e light 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,zi*xcw;yc by 9j)+ cm 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 (tha5ows/ w8rov2d +a: 2 th5qnrae 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.:s),1:)t h -axfkvrhr zsmcn return as an echo in 20 ms after transmission. Hh a)zt.,hm:n1vfrk sc-xr:)sow 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 Ears)*t.1l7)gg-xp h 3 pw 8lc8j 9.k stpewwzcncth (above the atmosphere) at a rate of aboutje-wg )wl*kxhs t8ctl .7n p.1c) cp9gw3s8zp $1350 \; W/m^{2}$. 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 ;t 72:fh5v rwj) xiazka rate of abouw)i;2 z75xakhv : jrftt $1350 \; W/m^{2}$. 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 distanf; y v)fzk2vq+,pkb;sm k8 y)yce 2.5 m from a 100-W lighq8vfy s) kky z;y2p k)b,f+;mvt 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 magnetic field at ame3s0hnrui le9;40 t2jzq5n z distance 2.5 m from a 100-W light bulb? 4 j3h5 szq 2te;rneiz00nl9um

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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 -ln:d;qph. zc(g z ll)out a narrow beam 2.00 mm in diameter. What is the average (rms) value of the elect.z (l :znpdgl)chq-;lric 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 v979ok j iucij;tlta-s- 01gm2.00 mm in diameter. What is the average (rms-jamijlu;tt 9- g oivk 70s1c9) 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 tranivtnifo+(h5xd 9 24qp7 q icr.3(mqlvsported 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, given t ge:*l/rbel7t hat 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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