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MHT CET Physics question

PhysicsWavesMHT CET

The frequency of a sonometer wire is 100 Hz. When the weights producing the tension are completely immersed in water, the frequency becomes 80 Hz and on immersing the weights in a certain liquid, the frequency becomes 60 Hz. The specific gravity of the liquid is

Answer: (B)

Solution

Tension and : gives for the weights, and

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Question ID VK-070277