Answer:
Form factor of an alternating current waveform (signal) is the ratio of the RMS (Root Mean Square) value to the Absolute Average Value (also referred to as the Practical Average Value) of the waveform.
In the case of a sinusoidal wave ie., an analogue wave, the form factor is approximately 1.11.
In the case of a square wave ie., a digital wave, the RMS and the average values are equal; therefore, the form factor is 1.