Lightning causes a DC transient waveform (A large initial current that decays to zero).
Lightning is a form of electrical discharge that is primarily AC (alternating current) in nature.
Lightning is static electricity. It's a buildup of charge, and it is facilitated by charge separation. In that light, it is DC.
I think it is Thunderstruck by AC/DC
Most people think that you spell AC DC like A-C-D-C. But really, the abbreviation is spelled A-C-Lightning bolt-D-C. It's a common mistake. LOL. |{.|{. That's all.
You're most likely thinking of AC/DC (the dash is usually in the form of a lightning bolt)
Lightning is an impulse. If you wish to break it down mathematically, it is many AC signals summed together (Think Taylor series, or something similar). You can define DC in a similar light; perfect DC will be the summation of infinitely high to low frequencies. This is really a non-question. The very reasons to distinguish between DC and AC exist for other cases as well - such as impulses and switching.
formula for ac to dc
A typical AC waveform is symmetrical about a zero crossing point. You can bias the AC with DC such that the AC waveform is symmetrical about the DC voltage.
The difference AC and DC grounding is that AC is alternate current and DC is direct current. Grounding for both AC and DC is the same.
AC/DC are from Sydney, Australia.
Ac/dc
AC means alternating current DC means direct current there is no polarity reversal