Power measurement refers to the process of quantifying the amount of electrical power consumed or generated by a device or system. It is typically expressed in watts (W) and can be measured using various instruments, such as multimeters or power analyzers. Accurate power measurement is essential for energy management, efficiency analysis, and ensuring compliance with electrical standards. In electrical systems, power can be categorized into three types: active power, reactive power, and apparent power. Active power represents the actual energy consumed, reactive power relates to energy stored and released, and apparent power combines both. Understanding these types helps in optimizing energy usage and improving system performance.