In what measurement unit is frequency expressed?

Frequency is expressed in Hertz (Hz), which defines the number of cycles per second of a periodic signal. In the context of electrical engineering, it is an essential parameter for understanding alternating current (AC) systems, signal processing, and various applications involving waveforms. A frequency of 1 Hz corresponds to one complete cycle of the waveform occurring in one second.

In contrast, amperes represent electric current, measured as the flow of electric charge. Volts are the measurement of electric potential difference, and ohms measure the resistance in a circuit. These other units do not pertain to the concept of frequency, which specifically describes how often a repeating event occurs in time. Understanding that frequency is linked to the rate of oscillation or repetition helps clarify why Hertz is the standard unit used to quantify it.