Answer Posted / vipul tayal

we always use a multiple of 1.11 bcoz for a pure sine wave
the FORM FACTOR is the ratio of rms value of voltage or
current with the avg. value of voltage or current and for
pure sine wave rms value of current is Imax/root '2' and
avg. value is 2Imax/pie. and which comes out to be 1.11 so
we cant have a combination of other then a multiple of 1.11.

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