( Electrical engineering : Electrical power )
The volt-ampere specification is used in AC circuits, but is less precise than in
DC circuits, because it represents apparent power, which often differs from true power.
Power factor is best thought of intuitively as the multiplier (ranging between 0 and
1) that you must use to obtain the real power from the apparent power.
The apparent power of an alternating current circuit is the product of the RMS values of the voltage
and the current, expressed as volt-amperes.
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