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MHT CET 2024 (16 May, Shift 2) · Beats

Beats question from MHT CET 2024 (16 May, Shift 2)

Q29MHT CET 2024 · 16 MAY · SHIFT 2Easy

Beats

Two sound waves having frequencies 250 Hz and 256 Hz superimpose to produce beat wave. The resultant beat wave has intensity maximum at $t = 0$ . After how much time an intensity will be minimum produced at the same point?

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Answer: (d)

Beat frequency $= 256 - 250 = 6\text{ Hz}$ , beat period $T = \frac{1}{6}\text{ s}$
A minimum comes half a beat period after a maximum: $t = \frac{T}{2} = \frac{1}{12}\text{ s}$
So the answer is (d) $\frac{1}{12}\text{ s}$ .

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