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MPSC State Service 2017 · GS · Question 55 of 100

A sound wave having certain frequency travels with a speed of 336 m/s and wavelength 3 cm. What will its frequency be? Will it be audible?

Physics

  1. A100800 Hz, No
  2. B100800 Hz, Yes
  3. C11200 Hz, No
  4. D11200 Hz, YesCorrect

Answer: D. 11200 Hz, Yes

Explanation

Frequency = speed/wavelength = 336 / 0.03 = 11200 Hz, which is within the audible range — so 11200 Hz, Yes.

Source: MPSC Rajyaseva Prelims 2017 GS Paper I (official paper)

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