Q147 / 150 · MHT CET 2019 (Shift 1) · Physics

For formation of beats, two sound notes must have

  • A
    Different amplitudes and different frequencies
  • B
    Exactly equal frequencies only
  • C
    Exactly equal amplitudes only
  • Correct answer
    D
    Nearly equal frequencies and equal amplitudes

Solution

In a sound notes various frequencies are mixed, hence beats can produced by two sound notes only when they have nearly equal frequencies and equal amplitudes.

Hence, the correct answer is option: 'D'.

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