PYQ NEET- Oscillations And Waves L-8

Question: An organ pipe filled with a gas at $27^{\circ} \mathrm{C}$ resonates at $400 \mathrm{~Hz}$ in its fundamental mode. If it is filled with the same gas $90^{\circ} \mathrm{C}$, the resonance frequency at the same mode will be

A) $512 \mathrm{~Hz}$

B) $420 \mathrm{~Hz}$

C) $440 \mathrm{~Hz}$

D) $484 \mathrm{~Hz}$

Answer: $440 \mathrm{~Hz}$



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