What term is used to describe the measure of power in a system?

The measure of power in a system is defined as Watts. Power, in the context of electricity and energy, is the rate at which work is done or energy is transferred over time. One Watt equals one Joule per second, which means that if one Joule of energy is used in one second, it equates to a power usage of one Watt. This measurement is fundamental in various systems, especially in electrical engineering and physics, as it helps to quantify how much energy is being used or produced over a specific period.

In contrast, Joules represent energy, Volts measure electric potential or voltage, and Ohms indicate resistance in an electrical circuit. While all these terms are interconnected within the realm of electricity, Watts distinctly measure power, making it the correct choice for this question.