Question

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

[CPMT 1999]to

• A. Same
• B. Double
• C. Four times
• D. Eight times

Answer 1

The correct option is C

Four times

Intensity $\propto (amplitude{)}^2$

as $A_{max}=2a_0(a_0$ = amplitude of on sourse ) so

$I_{max}=4I_0$ .