What is the definition of power in a circuit?

The definition of power in an electrical circuit is typically expressed as the rate at which energy is transferred or converted, which can be quantified as the voltage across a circuit multiplied by the current flowing through it. This relationship illustrates how power represents the amount of work done per unit of time.

When a circuit is in operation, power indicates how quickly electrical energy is utilized to do work, such as lighting bulbs, moving motors, or powering devices. In this context, power can be calculated using the formula P = IV, where P stands for power, I for current, and V for voltage. This formula directly ties the concepts of voltage and current to the overall power in the circuit.

While "the time rate of doing work" can describe the concept of power in a general sense, the most precise definition for power within the realm of electrical circuits is reflected in the relationship involving voltage and current. The other definitions relate to different aspects of electrical theory, such as voltage, current, and resistance, but they do not specifically address the concept of power as it is applied in electrical circuits.