An electromagnetic wave propagating in seawater has an electric field with a time variation given by E

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An electromagnetic wave propagating in seawater has an electric field with a time variation given by E = zE0 cost. If the permittivity of water is 810 and its conductivity is 4 (S/m), find the ratio of the magnitudes of the conduction current density to displacement current density at each of the following frequencies:
(a) 1 kHz,
(b) 1 MHz,
(c) 1 GHz,
(d) 100 GHz.
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Fundamentals of Applied Electromagnetics

ISBN: 978-0132139311

6th edition

Authors: Fawwaz T. Ulaby, Eric Michielssen, Umberto Ravaioli

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