Define average power (true power) in an $AC$ circuit.

(N/A) In an alternating current $(AC)$ circuit, the instantaneous power $p(t)$ varies with time. The average power $(P_{avg})$, also known as true power, is the average value of the instantaneous power over one complete cycle of the alternating current.
Mathematically, it is given by the formula: $P_{avg} = V_{rms} I_{rms} \cos \phi$, where $V_{rms}$ is the root-mean-square voltage, $I_{rms}$ is the root-mean-square current, and $\cos \phi$ is the power factor of the circuit.
This represents the actual power consumed by the resistive component of the circuit, measured in Watts $(W)$.