DIFFERENT FORMS OF ALTERNATING VOLTAGE EQUATION

The alternating voltage is given by the following standard equation:

e = E_m sin θ or e = E_m sin ω t

or

e = E_m sin 2 π ft (sin ω = 2π f) = E_m sin 2 πt/T (since f = 1/T)

Which form of the above equation is to be applied will depend upon the data given?

To determine the various values, for example, maximum value, frequency, time period, angular velocity, etc., the given equation is compared with the standard equation of any one of the form given above. For instant,

Maximum value of voltage, E_m = Coefficient of sine of time angle

Frequency,