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MHT CET202015 Oct 2020Morning ShiftPhysicsWaves and SoundActual

A resonance tube completely filled with water has a small hole at the bottom. Length of the tube is 0.8 ~m . A vibrating tuning fork of frequency 500 ~Hz is held near the open end of tube. Water is slowly removed from the bottom. The maximum number of resonances heard will be (Neglect end correction. Speed of sound in air =340 ~m / s )

Options

  1. A5
  2. B4
  3. C2
  4. D3

Correct answer

C. 2

Step-by-step solution

array l =0.8 ~m f =500 ~Hz v =340 ~m / s v = f = v f = 340 500 = 34 50 = 34 50 = 17 25 ~m 4 = 17 100 =0.17 ~m 3 4 =0.51 ~m 5 4 =0.85 ~m array So, only 2 resonances will be heard.

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