Of two identical tuning forks with natural frequency 256Hz, one is loaded so that 4...

JAMB 1984

Of two identical tuning forks with natural frequency 256Hz, one is loaded so that 4 beats per second are heard when they are sounded together. What is the frequency of the loaded tuning fork?

A. 260Hz
B. 252Hz
C. 248Hz
D. 264Hz
E. 258Hz

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Correct Answer: Option B

Explanation

- When a tuning fork is loaded with wax, the frequency of the tuning fork decreases, I.e when the prongs are loaded, their inertia increases, resulting in decrease of vibrational frequency.

Beat = F2 - F1

4 = 256 - F1

F1 = 252Hz

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