Beats are produced by waves y₁ = asin 2000π t and y₂ = asin 2008π t. The number of beats heard per second is (a) 4 (b) 1 (c) zero (d) 8

Answer: (a). f₁ = (2000π)/(2π) = 1000 Hz, f₂ = (2008π)/(2π) = 1004 Hz Beats per second = 1004 - 1000 = 4 So the answer is (a) 4.

Beats are produced by waves y₁ = asin 2000π t and y₂ = asin 2008π t… | MHT CET 2021 (20 Sep, Shift 2)

Q48MHT CET 2021 · 20 SEP · SHIFT 2Easy

Beats

Beats are produced by waves $y_1 = a\sin 2000\pi t$ and $y_2 = a\sin 2008\pi t$ . The number of beats heard per second is

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Answer: (a)

$f_1 = \frac{2000\pi}{2\pi} = 1000\text{ Hz}$ , $f_2 = \frac{2008\pi}{2\pi} = 1004\text{ Hz}$
Beats per second $= 1004 - 1000 = 4$
So the answer is (a) 4.

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