What is meant by True Power (Pt) in a circuit?

True Power (Pt) in a circuit is defined as the actual power consumed by the components of the circuit, and it is measured in watts (W). This power represents the work done by the circuit to produce useful energy, such as lighting a bulb or running a motor. True Power accounts for the resistance in the circuit and corresponds to the energy that is converted to heat, light, or mechanical energy.

It is essential to distinguish True Power from other types of power, such as apparent power, which represents the total power (both usable and non-usable) supplied to the circuit, and reactive power, which is power stored and released by inductors and capacitors. Therefore, the correct understanding of True Power relates specifically to the effective power that contributes to the actual work being accomplished in the circuit.