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The frequency of tuning fork A is greater than the tuning fork C by 2% whereas the frequency of tuning fork B is 3% less than the standard tuning fork C. Both A and B produce 6 beats/sec. find the frequency of tuning fork A.

The frequency of tuning fork A is greater than the tuning fork C by 2% whereas the frequency of tuning fork B is 3% less than the standard tuning fork C. Both A and B produce 6 beats/sec. find the frequency of tuning fork A. Correct Answer 122 Hz

Let the frequency of tuning fork C be n. Then the frequency of A and B is 1.02n and 0.97n respectively.

Given 1.02n – 0.97n = 6

Hence, n = 120 Hz

Frequency of A = 1.02 × 120 ≈ 122 Hz.

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