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 formulas

\(\large{ f =   \frac { 1 } { T  } }\)   
\(\large{ f = \frac { N_c } { t  }   }\)   
\(\large{ f = \frac{v}{ \lambda }   }\)   
\(\large{ f = \frac{c}{ \lambda }   }\)  
\(\large{ f = \frac{\omega}{ 2 \; \pi }   }\)  

Where:

\(\large{ f }\) = frequency

\(\large{ \omega }\)  (Greek symbol omega) = angular frequency

\(\large{ N_c }\) = number of cycles

\(\large{ \pi }\) = Pi

\(\large{ c }\) = speed of light

\(\large{ t }\) = time

\(\large{ T }\) = time period, the time required for one cycle or wave occillation

\(\large{ \lambda }\)  (Greek symbol \lambda) = wavelength

\(\large{ v }\) = wavelength velocity

 

Frequency (Probability) formulas

\(\large{ f_x =   \frac { n_x } { n  } }\)   
\(\large{ P_x = \frac { f_x } { f_a  }   }\)   

Where:

\(\large{ f_x }\) = relative frequency of outcome x

\(\large{ P_x }\) = probability of outcome x

\(\large{ f_a }\) = frequency of all events

\(\large{ n_x }\) = number of events with outcome x

\(\large{ n }\) = total number of events

 

Tags: Equations for Electrical Equations for Current