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JEE Main 2002 (AIEEE) · Beats

Beats question from JEE Main 2002 (AIEEE)

Q74JEE Main 2002 · AIEEEEasy

Beats

When temperature increases, the frequency of a tuning fork

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Answer: (b)

Frequency of a fork depends on the elasticity of its material.
On heating, the Young's modulus decreases (and the prongs lengthen), so the fork vibrates more slowly.
So the answer is (b) decreases.

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