A tuning fork gives 4 beats with 50 cm length of a sonometer wire. If the length of the wire is shortened by 1 cm, the number of beats is still the same. The frequency of the fork is

396

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400

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404

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384

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Solution

The correct option is A
396

$(n - 4) 50$ = $(n + 4) 49$

$n$ = $396 H z$

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A tuning fork gives 4 beats with 50 cm length of a sonometer wire. If the length of the wire is shortened by 1 cm, the number of beats is still the same. The frequency of the fork is

The correct option is A 396 (n−4)50 = (n+4)49 n = 396Hz

The correct option is A
396

$(n - 4) 50$ = $(n + 4) 49$

$n$ = $396 H z$