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In an experiment, sonometer wire vibrate...

In an experiment, sonometer wire vibrates in 4 loops when a 50 g weight is placed in the pan of weight 15 g. To make the wire vibrates in 6 loops the mass that has to be removed from the pan is approximately [frequency of vibration remains constant]

A

12 g

B

24 g

C

36 g

D

42 g

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