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NEET 2000 Physics question

PhysicsWavesNEET 2000

A string is cut into three parts, having fundamental frequencies , and respectively. Then original fundamental frequency 'n' related by the expression as :

Answer: (1)

Solution

The fundamental frequency of a string of length under tension with linear density is , so , i.e. with the same constant for all pieces. The original length is

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Question ID VK-088561