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MHT CET Physics question

PhysicsWavesMHT CET

A tuning fork 'A' produces 5 beats per second with a tuning fork of frequency 480 Hz. When a little wax is stuck to a prong of fork A, the number of beats heard per second becomes 2. What is the frequency of tuning fork A before the wax is stuck to it? [MHT-CET 2022]

Answer: (D)

Solution

Before waxing , i.e. 475 Hz or 485 Hz; waxing lowers , and the beats fall to 2 only if moves towards 480 Hz, i.e.

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Question ID VK-070530