# Frequency

Written by Jerry Ratzlaff on . Posted in Electrical Engineering

Frequency, abbreviated as f or FREQ, is the number of times an alternating current reverses itself in one second.  Expressed in Hertz (Hz), which is one cycle per second.

Frequency Probability, is the rate of occurrence.

## Frequency formula

$$\large{ f = \frac { 1 } { T } }$$
Symbol English Metric
$$\large{ f }$$ = frequency $$\large{Hz}$$ $$\large{s^{-1}}$$
$$\large{ T }$$ = time period, the time required for one cycle or wave occillation $$\large{sec}$$ $$\large{s}$$