# Frequency

Written by Jerry Ratzlaff on . Posted in Electromagnetism

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

• Abbreviated as FREQ

## formula

$$f = \frac { 1 } { T } = \frac { N_c } { t }$$

Where:

$$f$$ or $$\nu$$ (Greek symbol nu) = frequency

$$T$$ = period, the time required for one cycle

$$N_c$$ = number of cycles

$$t$$ = time, seconds

Solve for:

$$T = \frac { 1 } { f }$$