The form factor of a pure sinusoidal alternating current wave is defined as:
ARatio of Peak value to Average value
BRatio of Average value to Peak value (0.637)
CRatio of Peak value to RMS value (1.414)
DRatio of RMS value to Average value (1.11)
Explanation
Form Factor = RMS Value / Average Value = (V_m / sqrt(2)) / (2 * V_m / pi) = pi / (2 * sqrt(2)) ≈ 1.11.

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