Quote:
Originally Posted by Altavia
Correct from a DC current perspective.
But is the current induced by lightening:
1. AC
2. DC
3. Both
4. Neither
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Technically, lightning is DC, just electrons moving in one direction from source to ground. However, because lightning is an extremely short and powerful pulse of DC current, it creates a very strong electromagnetic field that contains a very broad spectrum of 'radio' waves. That's why you can hear lightning on an AM radio. So, that 'radio' energy doesn't just travel cleanly on a wire to ground, it surrounds the wire for some distance, and can impact nearby electronics.