On Dec 24, 10:52*am, Cecil Moore wrote:
Keith Dysart wrote:
And P = V * I seems rather fundamental, so V or
I is always 0, then P must always be 0.

Make that *NET* power and you will be correct. There is
zero *NET* power transfer in pure standing waves.

Oooppps. Make that "so *if* V or I is always 0".

And if I had meant *NET* I would have written "net".

Since Pfor = Pref, then Pfor - Pref = 0

Isn't that superposition of power? Something that
most agree is not a legal operation.

In any case, for sure it is 'average' power.

All my examples are using instantaneous power.
If the instantaneous power is always 0, the
average power can not be different.

...Keith