Electromagnetic fields from lightning can couple to electrical systems and produce transient overvoltages, which can cause power and telecommunication outages and destruction of electronics. Therefore calculation of the electric and magnetic fields from different lightning processes has practical applications. In this chapter expres sions for electric and magnetic fields are derived for some simplified charge and current configurations applicable to lightning. In general, lightning currents and charges vary with time. First, simple expressions for nontime-varying cases are presented, then electric and magnetic field expressions from time-varying lightning sources are given.
Computation of electromagnetic fields from lightning discharge, Page 1 of 2
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