Which term defines the rate of transfer or absorption of energy per unit time in a system?

The term that defines the rate of transfer or absorption of energy per unit time in a system is power (P). Power is a fundamental concept in physics and engineering, representing how much energy is used or generated in a specific time frame. It is a measure of the energy consumption or production in electrical systems, expressed in watts (W), where one watt equals one joule of energy transferred per second.

In electrical systems, power can be calculated using the formula P = V × I, where V is voltage and I is current. This relationship indicates that power is directly affected by both voltage and current in a circuit. Understanding power is crucial for evaluating the efficiency of electrical systems, designing circuits, and implementing energy management strategies.

Voltage is associated with electric potential difference, current measures the flow of electric charge, and frequency relates to the number of cycles of a periodic signal per unit of time. While all these terms are interconnected within electrical systems, they do not define the concept of energy transfer per unit time as clearly as power does.