Ok. Now I understand the first question. Watts specified already has the
time component. It doesn't matter how long the resistor is turned ON. The
more time its ON the more amount of work (Joules) is done. So, the ratio
Joules/time is constant.



> Do you mean use Root Mean Square(RMS) to measure a variable something
> over time? I'm not sure I understand the second question.



May be I need to rephrase my second question.- Here is the scenario -

I have a device that consumes 150mA when active and 500uA during sleep. The
sleep/activity happens quite fast and periodic. The current puleses
overshoots to about 300mA when the device activates.  I want to get a good
estimate on the power consumption accounting the current overshoots. Is
there a way for doing it?
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