How is frequency defined in electrical terms?

Frequency, in electrical terms, is defined as the number of complete oscillations or cycles that occur in a circuit or signal in one second. This is measured in Hertz (Hz), where one Hertz equals one cycle per second. Frequency is a fundamental concept in alternating current (AC) systems, where the current and voltage alternate over time. Understanding the frequency of a signal is crucial because it affects how electrical systems operate, including the design of circuits, the response of components, and overall system stability.

The other options represent different electrical parameters: current refers to the flow of electric charge; voltage is the electrical force that causes current to flow; and resistance quantifies how much a material opposes the flow of electric current. Each of these elements is essential in electrical engineering, but they do not relate to the concept of frequency.