Jim Kelley wrote:

Cecil Moore wrote:

Jim Kelley wrote:
There is no convention describing
unidirectional flow of alternating current. That is what you've been
trying to say, i.e. current into one end of a coil.

What do you mean there is no
convention describing instantaneous current flow for AC?

What do *you* mean by it? I never said anything like that.

There is indeed a convention for describing unidirectional flow of
alternating current during 1/2 of the AC cycle. And RMS is exactly a
convention, adopted from DC, of describing an equivalent unidirectional
flow of AC current. That is what has been confusing you all along. Once
again, AC current changes direction every 1/2 cycle and the sign of
the cos(phase) function determines which of two, and only two directions,
it flows. Current is NOT a vector. Current is a phasor with two and only
two directions in a wire. Your phasor current "phase" is only an imaginary
math function, a crutch to make the math easier. One amp at 90 degrees
exists in your head, not in the real world..
--
73, Cecil http://www.qsl.net/w5dxp



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