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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.hvrmx n8.to+p*n,z omagnetism 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 proyogxv;9. le+y6x 9vz2erb k.cz, fauxv4s o:, duced 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 p1w9duq)qx 6o hroduce 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 ak3acandu-3q;/kvepjdc m g) ) b2 z2r9t

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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 electromaobc tpb q 52x2em-z3h*gnetic 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 travel thro32vyeo 7ot o9hugh

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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 fieyf622dkms 2e4 i2k: hu91dlvgxf,iz d* 6eqhelds in the radiation field are found to decrease with d,ve2*dmh1 u 6 x2flgfs4 6i2 eihkdy9d2q:zekistance 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 at3+z js) ab6re udvmu15 a given point its v3a1jmu+z)6dsu5r e b $E$ 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 radiat,;r flql60pi6c8f7 39rcpzyve tz if 9ed by a straight wire antenna that is oriented vertically. What should be the ori8;fr3z7y6fpciz9e l,9 ir 6p 0qcvftlentation 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 ar6cu n wl( 487bdrbq2fve

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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 electromagnet/4nnm-7lkd l0 pp f/fmic 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 wavelenr ( qni6twla7mimwco)6 r /s:)gth 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 wavunfwpqy+ qwl1,-5; ; hsx0u wxe transports per unit time per unit area is the ,-lw phx1ux;5; qfuwyqns0+ w

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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 wave fk2y *o ltz .n1ezu9;kis 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 correctlfm;xpwr 7x9i pw*rlho0u:x/:- uo 4ray lists electromagnetic waves in order from longest to shortel/aou9-4 7 *pf wox 0:xr xrrwui:hpm;st 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 valu 47pyok;mhb mr3nvft)q ;ynb5 p1 s.1me of 2.0 V/m, what is the peak value of qm t34 n57smvpof1b;)rb 1hp ;.knmyythe 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 ik1qko k7,s4;tvc2tov f 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 9rg r93tj++a gw2.9-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 0x7 .)vm(tza3 chna (vnqf dg-of a radio wave signal transmitted at a frequency of 7.2 Mzgqv).3- 0c 7namnv d aht((xfHz?

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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 st +q11 twjentrf mrk-::ation 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 frequenca 3g h3jfce7yr6)a2zmhx 7)k jy 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 dpu/ g7mhsrn 0z1 06mm1.0 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 traves:+s)b lr a2vnl 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 tak7iqhf la)a.ijj1ht + 5e 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 yy ;-wnxt na2uemk2rzls2-x,iu8,j kas :( 3vrear (the 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 f41ow 1mb63 v ryydis/that a transmitted pulse return as an echo in 20 ms after transmission. 6/o w1dby3 fvsrim4y1 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 Ea lplvzf 67 -8d+gaw9gzrth (above the atmosphere) at a rate of aboutz6d98vl +la-zggfw7 p $1350 \; W/m^{2}$. 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 vnr4fo-(*rgm 95cb egl 5xh0 wof abo5mbfglcne rhv94 5xw 0r-*g (out $1350 \; W/m^{2}$. 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- 7rpdk;*plsn-W li -*rkpps;l7 dnght 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 of9ft 1r rdo- dmbal9,x; the magnetic field at a distance 2.5 m from a 100-W light-9 olr;dd b9mxa1 f,rt 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 ngfi60g9ltt lk4ctm)k-s (m (beam 2.00 mm in diameter. What is the average (rms) vt6gk(mtf tgm)k sli n0-l(49calue 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 nq7)ftc0 2)h6h mcjhz varrow beam 2.00 mm in diameter. What is the average (rms) value of the magnet7mfhcz h2c)h 06jvt)q ic 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 transp b1btg1blxn- 7orted 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 ox0u.o) ae 7r )tn.4czhhb zyh,f 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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