What is the unit of frequency?

The unit of frequency is Hertz, which is defined as one cycle per second. In the context of electrical and radio communications, frequency is a crucial concept as it refers to the number of oscillations of a periodic signal in a given time frame. The Hertz is widely utilized in various applications, including audio, radio frequency, and other fields that involve wave phenomena.

The other units mentioned serve different purposes: Henry is a unit of inductance, Farad is a unit of capacitance, and Tesla is a unit of magnetic flux density. Each of these units is important in electrical engineering but does not relate to the measurement of frequency. Understanding these distinctions helps clarify why Hertz is the correct choice, as it specifically pertains to measuring how often an event occurs per unit time in cycles.