Answer Posted / rama krishna
Power is defined as the rate of flow of energy past a given
point. In alternating current circuits, energy storage
elements such as inductance and capacitance may result in
periodic reversals of the direction of energy flow. The
portion of power flow that, averaged over a complete cycle
of the AC waveform, results in net transfer of energy in one
direction is known as real power. The portion of power flow
due to stored energy, which returns to the source in each
cycle, is known as reactive power.
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