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MHT CET 2020 (16 Oct, Shift 1) · Beats

Beats question from MHT CET 2020 (16 Oct, Shift 1)

Q53MHT CET 2020 · 16 OCT · SHIFT 1Easy

Beats

Two waves $Y_1 = 0.25\sin 316t$ and $Y_2 = 0.25\sin 310t$ are propagating along the same direction. The number of beats produced per second are

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Answer: (c)

Beat frequency $= \frac{\omega_1 - \omega_2}{2\pi} = \frac{316 - 310}{2\pi}$
$= \frac{6}{2\pi} = \frac{3}{\pi}$ per second
So the answer is (c) $\frac{3}{\pi}$ .

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