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NEET UG PHYSICS MCQ: WAVES

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Application +4 | -1
A cylindrical tube containing air is open at both ends. If the shortest length of the tube for resonance with a given fork is 20  cm20\,\,cm, the next shortest length for resonance with the same fork will be
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Correct option: B
40cm40\mathrm{ }cm
Option B (40cm40\mathrm{ }cm) is correct because the next shortest length for resonance in an open tube is twice the shortest length.

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