- Joined Nov 5, 2011
Is the true power on a circuit usually greater than the apparent power? and are they equal in a circuit with both resistance and inductance?
consider that circuits perform a wide variety of functions, some where a high value of reactance is desirable, others not. But, generally speaking, unity power is the most desirable, as such, measures are taken to reduce the reactive component as much as possible. If there is any measurable amount of reactive power, then the apparent power will be larger than the real power. Inductive reactance can be negated with capacitive reactance to bring it into unity, where real power and apparent power are equal.
True power can never be greater than apparrent power. At unity power factor they are equal. At any other PF, apparrent power is greater.
True power is less than or equal to apparent power. They are equal when there is no inductance or capacitance in the circuit.
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by Kate Smith