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A sonometer wire resonates with a given ...

A sonometer wire resonates with a given tuning fork forming standing waves with five antinodes between the two bridges when a mass of `9kg` is suspended from the wire. When this same tuning fork forming three antinodes for the same positions of the bridges. the value of `M` is

A

12 kg

B

5 kg

C

12 . 5 kg

D

1/25 kg

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The correct Answer is:
A
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