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Form factor of sinusoidal ac signal is:
1. 1.11
2. 0.11
3. 2.11
4. 3.11

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Correct Answer - Option 1 : 1.11

The ratio of RMS value (RV) to the average value (AV) is known as the form factor.

\(Form\;factor = \dfrac{{RV}}{{AV}}\)

For a pure sinusoidal waveform, the average or mean value will always be equal to 0.637 Vmax

The RMS Value of AC signal is given by \(\dfrac{V_{max}}{√2}\)

 \(Form factor=\dfrac{\dfrac{V_{max}}{√2}}{0.637V_{max}}\)

= 1.11

  • For Square wave with zero DC value: 1
  • For a Triangular wave with zero DC value: \(\frac{2}{\sqrt3}\)
  • For a Full wave rectified sine wave: 1.11

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