A tuning fork of known frequency 256 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 [AIEEE 2003]

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

1.	A tuning fork of known frequency 256 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 [AIEEE 2003]
A.	256 + 5 Hz
B.	256 + 2Hz
C.	750 Hz
D.	256 ? 5Hz
Answer» E.

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A tuning fork of known frequency 256 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 [AIEEE 2003]

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