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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 24ceakhe,r/ b for all electromagnetism 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 produced e 4umr4y/rd je4: f5q*p3 iilvby 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 prod9id ugyv, zx0 j. jz:rz85i,fiuce 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 th++ s 9mfp2grywrough 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 velocit4ast-:f k xajp fu:31jy 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 travel thrwxw 5wse0ccvt:a )y5 6ough

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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 radiationfm9y-y4+.-u zb occsjg nu7-o6s *sf s field are found to decrease with distance b-u cjo4c+-u6 s.s fn -*gsf o7mzys9yas

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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 instas lsx )v9u 9d)ylois;/f73opnnt at a given poinsfo 9/))dll;px u3 s7io9y nvst 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 wire antenna4 n ;d*uv zmd:wgl6c7tz (vogq/3tu l3 that is oriented vertically. What should be the orientation of a straight wire receiving antenna4z6/dcovg3dw;: n*( z gvqmu3 t lul7t? 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 f5h0j: )1rldy afdx7u :-ne4dq a,bffare

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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 elex3 bxw.a n6;aectromagnetic 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 wavelenak *hypnf70b ,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 electro7 kb,)o) 1zye-u b cq6gxsk79bt5gamkmagnetic wave transports per unit time per unit area is the k-b6og7ey)1gz)tq ab, u x9k7mkcbs5

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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 is ccum.c6w:,ig e alled 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 elb7+b7ndi3 gb -y,9hw/az x:k s-xht aeectromagnetic waves in order from longest-3 b7hg+a xkd9en ya 7/bshz-wx,i:tb to 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/m, what ispr4x dosb8(lo,gk: 4zt:,i gc 0wdc,u the peak value of tzcxl ,ioo 4dks,4 bp(0rc8w:gd,:guthe 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 wa 0afy;z)rwql,ves 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 o xt8u0pi g1rl0xairj)b7fz *1f 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 transminxbwa:h w/:xvovc1 f3p z8wl )z5ei )7tted at a frequency of 7.2 MHz?va3)pv: xx wzc:/hozl i7f85wn)1bw e

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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 s ab5u7-4gbec.f4f n 8lqowfn1tation 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 frequenccg7o 4donl4 mf .gna )v22d3yky 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;id,wq )k)ed p.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 travel 1.0 m?kv s4p+ 29zpf8wvfs:f

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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 stl+ oe h1*btxn8ation 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 yp1 60ugsfbk*a 0i2 jveear (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 that a tabnq35 rp1)l r45q uyy0cx1 rtransmitted pulse return as an echo in 20 ms after try) prclu arbqxnr1 5t4350 q1yansmission. 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 Earth (above the atmospheren;h;h-ap j n-jgzx0 e*) at a rate of about*j ea -px;n hn;hzg-0j $1350 \; W/m^{2}$. 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 ; ahp*2ila6 kaxhb m1:f1xk a5pd88jzEarth (above the atmosphere) at a rate of abou hma : iaa;dhkxp5zbpa x8jk12lf*861t $1350 \; W/m^{2}$. 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 p xb:c()hd (af psi36hof the electric field at a distance 2.5 m from a 100-W ligh(s3 hap:( bx6c)fipdht 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 a distance 2.5 m from a 182a10lcct b/lly 6p7wo:g ifc5rjd9 d00-W lic /l5016 pw7dbt lolyrcjg8: d2afi9cght 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 diameter. Whato: vesc3zkk / i2 .me(v3egaq7hyh 9+t is the average (rms) value of the electri e tkhmiq+y9e72 z: o kgh3acevs/.v3(c 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 2.0 lhq:o2: lxsz1tu6*is0 mm in diameter. What is the average (rms) value of the maghs:x6 s2tzuol* 1liq:netic 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 transported across x)ci 7e49 q*i k8qzossa $1.00 \; cm^{2}$ 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 0d05-:a.dhe 4zzvacn ffu;ththat 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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