A source of unknown frequency gives 4 beats//s, when sounded with a source of known frequency 250 Hz
Channel: Doubtnut
Date: 19/01/2020

A source of unknown frequency gives 4 beats//s, when sounded with a source of known frequency 250 Hz. The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513 The unknown frequency is