This is obviously an electronics question.(adsbygoogle = window.adsbygoogle || []).push({});

In communication systems, to calculate the power of a sine wave, the formula below is used

Power (Sine Wave) = 1/2 * (peak amplitude)^2

This formula is apparently a standard electronics formula.

I'm trying to understand where it comes from. How is it possible to get a power figure from a voltage only? There is no information on period, current, or resistance. Can some one please help explain the logic behind this formula for me?

Maybe its a simple trick, to me they've probably simply integrated the sign wave, but the limits must cancel out... i Don't know.... help please..

Cheers

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# Power of a sine wave (electronics engineering)

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