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Homework Help: Electromagnetics problem

  1. Apr 22, 2005 #1
    H = 30 sin ( 2*pi*10^8*t - 5*x) in the z direction milli-amp/meter.
    First question is if μr = 1, find εr.

    H is the magnetic part of a plane wave in a lossless dielectric.
    I dont see any way to find εr from the information thats been given.
     
  2. jcsd
  3. Apr 22, 2005 #2

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    What is the speed of the wave? How does the speed relate to the dielectric constant?
     
  4. Apr 22, 2005 #3
    just had a thought, if the square root of μr*εr = 5, than μr = 25 correct?
     
  5. Apr 22, 2005 #4

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    I think you mean εr, and if μr is 1, then that is obviously true.
     
  6. Apr 22, 2005 #5
    i mean, thats the answer to the question right?
     
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