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MHT CET202120 Sep 2021Evening ShiftPhysicsWaves and SoundActual

The frequencies of three tuning forks A, B and C are related as n _ A > n _ B > n _ C . Which the forks A and B are sounded together, the number of beats produced per second is ' n ₁ '. When forks A and C are sounded together the number of beats produced per second is ' n ₂ '. How may beats are produced per second when forks B and C are sounded together?

Options

  1. An ₁- n ₂
  2. Bn ₁+ n ₂ 2
  3. Cn ₂- n ₁
  4. Dn ₁+ n ₂

Correct answer

C. n ₂- n ₁

Step-by-step solution

n _ A - n _ B = n ₁ n _ A - n _ C = n ₂ Subtracting Eq. (i) from eq. (ii) n _ B - n _ C = n ₂- n ₁

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