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. Wha

Question

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?

TestHub · Accepted Answer

(D) Frequency of tuning fork B = 480 Hz . It produces 5 beats with tuning fork A . Therefore frequency of tuning fork A can be 485 Hz or 475 Hz . On loading the tuning fork A with wax its frequency will decrease. Since the number of beats decreases, it means its frequency is higher than that of B. Hence its frequency is 485 Hz . #

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