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Sound Waves — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsSound Waves1 Mark
Question
An electrically maintained tuning fork vibrates with constant frequency and constant amplitude. If the temperature of the surrounding air increases but pressure remains constant, the sound produced will have:
  1. Larger wavelength.
  2. Larger frequency.
  3. Larger velocity.
  4. Larger time period.
✓

Answer

  1. Larger wavelength.
  1. Larger velocity.

Explanation:

The velocity varies with temperature as $\text{v}\propto\sqrt{\text{T}}.$ Therefore, it increases. Since the frequency remains constant, the wavelength will increase as $\lambda\propto\text{v}.$

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