What unit of frequency is equal to one cycle per second?

The unit of frequency that is defined as one cycle per second is Hertz. The term Hertz is derived from the name of the German physicist Heinrich Hertz, who made significant contributions to the understanding of electromagnetic waves. In the context of frequency, Hertz quantifies how many cycles of a periodic event occur in one second, making it a fundamental unit in various fields, including telecommunications, electronics, and acoustics.

Watt, Volt, and Ohm are units related to power, voltage, and resistance, respectively, within the realm of electrical engineering. While all these quantities are interconnected in the study of electrical systems, they do not measure frequency. Therefore, Hertz is the correct and relevant unit for indicating the number of cycles per second, providing a direct measure of frequency.