The form factor of sinusoidal alternating current is – Basic Electrical Engineering MCQ#38

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The form factor of sinusoidal alternating current is:

  1. 0.97
  2. 1.11
  3. 3.54
  4. 7.48

Correct answer: 2. 1.11

Explanation: Mathematical formula for the form factor

Form factor = RMS value/Average value

In case of Sine wave:

  • RMS value of Sine wave= 0.707 * Vmax
  • Average value of Sine wave= 0.637 * Vmax

So

Form factor of Sin wave = RMS/Average

= 0.707 * Vmax /0.637 * Vmax = 1.11

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