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NEET 2016 (Phase 1) · Organ Pipes & Resonance Tube

Organ Pipes & Resonance Tube question from NEET 2016 (Phase 1)

Q111NEET 2016 · PHASE 1Easy

Organ Pipes & Resonance Tube

An air column, closed at one end open at the other, resonates with a tuning fork when the smallest length of the column is 50 cm. The next larger length of the column resonating with the same tuning fork is

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Answer: (a)

Closed pipe resonates at $l_1 = \frac{\lambda}{4}$ , $l_2 = \frac{3\lambda}{4}$ , so $l_2 = 3l_1$ .
$l_2 = 3 \times 50 = 150\text{ cm}$
So the answer is (a) 150 cm.

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