Power factor: In electrical engineering

In electrical engineering, power factor is only and only related to AC circuits i.e. there is no power factor (P.f) in DC circuits due to zero frequency and phase angle difference (Φ) between current and voltage. Learn about the power factor in electrical systems and how it represents the efficiency of power usage. Discover the importance of power factor in determining the cost and performance of an electrical system. Learn what power factor is and how to calculate it for AC circuits with resistance, capacitor and inductor. Download a free power factor calculator tool to find the optimal value for any load. The Power Factor (P.F.) is a ratio of the real power that is used to do work and the apparent power that is supplied to the circuit.