A tuning fork of known frequency 256 ~Hz makes 5 beats per second...

A tuning fork of known frequency

256 \mathrm{~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

Options

A $256+2 \mathrm{~Hz}$
B $256-2 \mathrm{~Hz}$
C $256-5 \mathrm{~Hz}$
D $256+5 \mathrm{~Hz}$

Correct answer

A. $256+2 \mathrm{~Hz}$

Step-by-step solution

No Solution Available

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