August 25th 03, 05:28 PM
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wrote in message ...
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But I have asked that if you wish to contend that
instantaneous power is of no use while instantaneous current is, that
some rationale be provided. The previous arguments were that it made
no sense because when dt was 0, there was no power.
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(Agreeing with Keith...) Of course there MUST be instantaneous power,
because if there is not, then one cannot find energy by taking the
integral of power over time. The instantaneous value may be zero, or
positive, or negative, of course. Or perhaps another way to look at
it is that if energy, which itself is a function of time, is
differentiable, then power must take on instantaneous values.
Cheers,
Tom
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