A source of sound with adjustable freque...

A source of sound with adjustable frequency produces 2. beats per second with a tuning fork when its frequency is either 476 Hz or 480 Hz. What is the frequency of the tuning fork ?

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The correct Answer is:

As the tuning fork produces 2 beats with the adjustable frequency the frequency of the tuning fork will be
`rarr n=((476+480))/2=478`

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