The frequencies of two sound sources are $256 H z$ and $260 H z$ respectively. The beat frequencies produced by them will be

0.025 s^{- 1}

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2.5 s^{- 1}

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4.00 s^{- 1}

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25 s^{- 1}

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Solution

The correct option is C $4.00 s^{- 1}$
Given: $ν_{1} = 256 H z$ and $ν_{2} = 260 H z$

Beat frequencies produced $b = | ν_{1} - ν_{2} |$ $s^{- 1}$

$b = | 256 - 260 |$ $s^{- 1}$

$⟹ b = 4.00 s^{- 1}$

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