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Waves Part 1

Section: Physics

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Question : 93 of 100

Marks: +1, -0

A tuning fork of known frequency

256\,\text{Hz}

makes 5 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per second when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was

$256+2\,\text{Hz}$
$256-2\,\text{Hz}$
$256-5\,\text{Hz}$
$256+5\,\text{Hz}$

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