The beats are produced by two sound sources of same amplitude and of nearly equal frequencies. The maximum intensity of beats will be ...... that of one source
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(c) Intensity $\propto$ (amplitude)$^2$
as ${A_{\max }} = 2{a_o}$($a_o=$ amplitude of one source) so ${I_{\max }} = 4{I_o}$.
as ${A_{\max }} = 2{a_o}$($a_o=$ amplitude of one source) so ${I_{\max }} = 4{I_o}$.
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