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A pipe open at both ends has a fundamental frequency f in air. The pipe is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is now:

Options

  1. A2 f
  2. Bf
  3. Cf 2
  4. D3 f 4

Correct answer

B. f

Step-by-step solution

f = v 2 l f ′ = v 4 l ′ = v 4 l 2 = f

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