A tuning fork of known frequency `256 Hz` makes `5` beats per second with the vibrating
Channel: Doubtnut
Date: 2020-07-05

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