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MHT CET Physics question

PhysicsWavesMHT CET

Tuning fork of frequency 305 Hz produces 5 beats with another tuning fork . After filling tuning fork , it produces 3 beats with . The frequency of before filling was [MHTCET 2016]

Answer: (A)

Solution

Initially = 300 or 310 Hz; filing raises the frequency of , and beats decrease from 5 to 3 only if moves toward 305 Hz, so

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Question ID VK-070412