How is power defined in electrical engineering?

Power in electrical engineering is defined as the rate at which electrical energy is transferred by an electric circuit. The correct formulation for this is given by the equation Power = Current × Voltage. This relationship expresses how power (measured in watts) relates to both the current flowing through a circuit (measured in amperes) and the voltage across that circuit (measured in volts).

When current flows in a circuit, it does work by moving charge carriers through an electric potential difference (voltage). The product of current and voltage gives the instantaneous power consumed or produced by the electrical device. This fundamental relationship is derived from Ohm's law and forms a key principle in circuit analysis and design, enabling engineers to calculate the power requirements of various electrical components. Understanding this concept is essential for tasks such as designing circuits, specifying electrical equipment, and conducting energy efficiency assessments.