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MHT CET20227 Aug 2022Morning ShiftPhysicsWaves and SoundActual

A string in a musical instrument is 50 ~cm long and its fundamental frequency is 800 ~Hz . Keeping the tension applied to the string same, the change in the length to produce sound note of fundamental frequency 1000 ~Hz will be.

Options

  1. A10 ~cm
  2. B20 ~cm
  3. C60 ~cm
  4. D40 ~cm

Correct answer

D. 40 ~cm

Step-by-step solution

For stretched string v 1 l v ₁ v ₂ = l₂ l₁ l₂= 800 1000 50=40 ~cm

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