Answer Posted / nimish suchak

it is a Root Mean Square Value. it is also known as
effective value. In D.C. supply value of current is
constant so we can easily find the effective value of
current but in A.C. supply current is not constant. so to
find the efective value we taking reference Heat. it means
it is that value of D.C. current which when flowing through
the circuit produces the same amount of heat as produced by
A.C. current in same circuit in same time.

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