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MHT CET Medical202623 April 2026Evening ShiftPhysicsWaves and SoundActual

The tension in a piano wire is increased by 25 % . Its frequency becomes " nf ", where f is the original frequency, then, the value of n is nearly

Options

  1. A0.8
  2. B1.25
  3. C1.12
  4. D1.56

Correct answer

B. 1.25

Step-by-step solution

The frequency of a stretched wire is given by f = 1 2L T This implies f T Given that the tension is increased by 25 % , the new tension is T' = T + 0.25T = 1.25T The new frequency is f' = 1.25T T f = 1.25 f Comparing with f' = nf , we get n = 1.25 Answer: 1.25

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