Teaching RPSC School Lecturer Mock Test Series 2024 Physics Waves Beats

Two adjacent piano keys are struck simultaneously. The nodes emitted by them have frequencies n1 and n2. The number of beats heard per second is

1
\(\frac {(n_1 - n_2)}2\)
2
\(\frac {(n_1 + n_2)}2\)
3
(n1 - n2)
4
2(n1 - n2)
5
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