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Waves and Sound — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsWaves and Sound1 Mark
MCQ
When temperature increases, the frequency of a tuning fork
  • A
    Increases
  • ✓
    Decreases
  • C
    Remains same
  • D
    Increases or decreases depending on the material
✓

Answer

Correct option: B.
Decreases
(b) With temperature rise frequency of tuning fork decreases. Because, the elastic properties are modified when temperature is changedalso, $n_t=n_0(1-0.00011 t)$where $n_t=$ frequency at $t^{\circ} \mathrm{C}, n_0=$ frequency at $0^{\circ} \mathrm{C}$

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