What is the difference between RMS and Average Value?

In this tutorial, we are going to learn about the difference between RMS and Average Value.

S. No.RMS ValueAverage Value
1It is of a set of values is the square root of the arithmetic mean of the squares of the values, or It can also be defined for a continuously varying function in terms of an integral of the squares of the instantaneous values during a cycle.It is of sinusoidal alternating voltage or current over one cycle is zero because the area of the positive half cycle is exactly equal to the area of the negative half cycle. While the average value over half cycle either positive or negative is not zero. Thus, the average value of sinusoidal voltage or current means half-cycle average value.
2RMS Value is given by that steady (d.c.) current which when flowing through a given circuit for a given time produces the same heat as produced by the alternating current when flowing through the same circuit for the same time.The average value of an alternating current is expressed by that steady current which transfers across any circuit the same charge as is transferred by that alternating current during the same time.
3The general formula of RSM value of alternating current. IRMS = √Ø2PI2dwt  / Ø2P dwtThe general formula of the average value for alternating current  IAvera = ØPIdwt  / ØP dwt
4RMS value of half-wave rectifier is   IRMS = IM / pThe average value of half-wave rectifier is Im/p
5RMS value is the root of the average of the square of the instantaneous value of any wave is the squared it comes always wave in positive   The average value is the simple average of any wave. It comes positive for the positive half and negative for the negative half of a sine wave. Its value is peak voltage /pie for one half only and zero
5RMS value is equal to the product of form factor and average value.The average value is equal to the division of form factor and R.M.S.
6.   7.Suppose that AC voltage rises and falls with time, If it takes more AC voltage to produce a given RMS voltage than it would for DC. For example, it would take 169 volts peak AC to achieve 120 volts RMS The value of alternating current changes with time and its direction changes after every half cycle. Hence, for a full cycle, the average value is zero.

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