There are three sources of sound of equal intensity with frequencies 4 – McqOptions

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1.	There are three sources of sound of equal intensity with frequencies 400, 401 and 402 vib/sec. The number of beats heard per second is [MNR 1980; J & K CET 2005]
A.	0
B.	1
C.	2
D.	3
Answer» C. 2

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