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Power from power source - average values or the RMS values?

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dinesh hegde

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Power from power source

While calculating the power of power sources (eg: VCC) do we need to consider the average values or the RMS values?
 

Re: Power from power source

In the general case (arbitrary source voltage and current) the product of instantaneous voltage and current as to be averaged to calculate the power flowing out of/into the source.
Code: 
P(t) = V(t)*I(t), Pavg = |V(t)*I(t)|
For V = const, the expression simplifies to
Code: 
P(t) = V*I(t), Pavg = V*|I(t)|
RMS values aren't involved in any case.
 

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