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14. waves and sound — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics14. waves 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
(b) With temperature rise frequency of tuning fork decreases. Because, the elastic properties are modified when temperature is changed
also, ${n_t} = {n_s}(1 - 0.00011t)$
where ${n_t} = $ frequency at $t^\circ C$, ${n_0}$= frequency at $0^\circ C$

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