For L-C parallel circuit, power factor is:

Explanation

In an LC parallel resonance circuit, the power factor is the ratio of the real power, or the power that is actually consumed by the circuit, to the apparent power, or the power that is supplied to the circuit. The power factor of an LC parallel resonance circuit that has capacitive and inductive components will depend on the specific values of the capacitive and inductive components, as well as the frequency of the applied voltage.In general, an LC parallel resonance circuit will have a power factor of less than one, since the capacitive and inductive components will react differently to the applied voltage, resulting in some power being stored in the circuit rather than being consumed. At the resonant frequency, where the reactance of the capacitive and inductive components is equal and opposite, the power factor of the circuit will be zero, meaning that no power is consumed by the circuit.The power factor of an LC parallel resonance circuit can be adjusted by changing the values of the capacitive and inductive components. For example, increasing the capacitance or decreasing the inductance will shift the resonant frequency of the circuit, resulting in a different power factor at a given frequency.