What term describes the Active and/or Reactive Power at a given moment?

The term that describes the Active and/or Reactive Power at a given moment is accurately referred to as Instantaneous Power. This term is used in electrical engineering to denote the total power being supplied or consumed by an electrical system at a specific point in time. Instantaneous Power is the product of the voltage and current at that moment, taking into account both the active (real) and reactive components, which is crucial in determining the performance and efficiency of electrical systems.

Power Demand, while it relates to how much power is required by a system over a period, does not specifically indicate the power at a distinct moment. Reactive Load refers to the portion of the load that absorbs reactive power and does not accurately convey the system's instantaneous behavior. Demand generally refers to the measure of power usage over a longer duration and is not tied to a specific instance of power measurement. Understanding the concept of Instantaneous Power helps in analyzing fluctuating loads in systems and ensures proper equipment sizing and operational efficiency.