Explanation: In AC circuits, inductors and capacitors store and release energy rather than dissipating it. This results in the current and voltage being out of phase with each other. The power associated with this out-of-phase energy flow is termed **reactive power**. It represents the energy that oscillates between the source and the reactive components and does not perform useful work. * **True power** (or real power) is the power dissipated by resistive components, performing useful work, and is in-phase with the voltage and current. * **Effective power** is not a standard, precise term in this context. * **Peak envelope power (PEP)** refers to the average power of an RF cycle at the highest modulation peak of a modulated signal, not the out-of-phase power in a general AC circuit.