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QNEET-2018-Ph-903: NEET 2018 Physics - Class 11 NEET-2018-Ph-903 Solution: A tuning fork is used to produce resonance in a glass tube. The …

A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of 27∘C27^\circ C two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency of the tuning fork is 320 Hz the velocity of sound in air at 27∘C27^\circ C is 330 m s−1s^{-1} 339 m s−1s^{-1} 350 m s−1s^{-1} 300 m s−1s^{-1}

Multiple Choice Options

  • A 330 m s �1
  • B 339 m s �1
  • C 350 m s �1
  • D 300 m s �1

Step-by-Step Verified Solution

Two successive resonance are produced at 20 cm and 73 cm of column length _ _ 2 = (73 - 20) _ 10 -2 m _ _ = 2 _ (73 - 20) _ 10 -2 m Velocity of sound, v = n _ = 2 _ 320 _ (73 - 20) _ 10 -2 m = 339 m/s

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