Root Mean Square
In physics, the root mean square or rms
value of an alternating current or potential difference is not
the same as the root mean square used in math calculations.
Definition of root mean square in
physics
The root mean square value is the value of
the direct current or potential difference that would give the
same power dissipation as the alternating current or potential
difference in a given resistor.
The term 'alternating' can be taken to include not only sine
wave signals but any other regular waveform such as a square
wave signal or a triangular wave form.
Root mean square value calculation formula
for sine wave only.
Representing sine wave signals can be either
by:
1) graphs of y = instant value, x = time
or
2) an equation of the form:
where:
3) rotating vectors sometimes called
phasors.
