A) \[\frac{1}{2}\]sec
B) \[\frac{1}{4}\]sec
C) \[\frac{1}{8}\]sec
D) \[\frac{1}{16}\]sec
Correct Answer: C
Solution :
Beat period \[T=\frac{1}{{{n}_{1}}\tilde{\ }{{n}_{2}}}=\frac{1}{384-380}=\frac{1}{4}\sec \]. Hence minimum time interval between maxima and minima \[t=\frac{T}{2}=\frac{1}{8}\sec .\]
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