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Two speakers A and B are placed 1 m apart, each produces sound

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Two speakers A and B are placed 1 m apart, each produces sound waves of frequency 1800 Hz in phase. A detector moving parallel to the line joining the speakers at a distance of 2.4 m away detects a maximum intensity at O and then at P. Speed of the sound wave is:

330 ms

^{- 1}

360 ms

^{- 1}

350 ms

^{- 1}

340 ms

^{- 1}

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Two speakers A and B are placed 1 m apart, each produces sound waves of frequency 1800 Hz in phase. A detector moving parallel to the line joining the speakers at a distance of 2.4 m away detects a maximum intensity at O and then at P. Speed of the sound wave is:

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Text solutionVerified

At point O path difference is zero.

At point P path difference, $= A P - BP = 1^{2} + 2.4^{2} - 2.4 = 0.2 m$

Path difference from first bright to second bright equal to $λ$

Path Difference $= λ = 0.2$

Velocity, $v = λ ν = 0.2 \times 1800 = 360 m s^{- 1}$

Hence, velocity is $360 m s^{- 1}$ .

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Question Text	Two speakers A and B are placed 1 m apart, each produces sound waves of frequency 1800 Hz in phase. A detector moving parallel to the line joining the speakers at a distance of 2.4 m away detects a maximum intensity at O and then at P. Speed of the sound wave is:
Answer Type	Text solution:1
Upvotes	151

Two speakers A and B are placed 1 m apart, each produces sound waves of frequency 1800 Hz in phase. A detector moving parallel to the line joining the speakers at a distance of 2.4 m away detects a maximum intensity at O and then at P. Speed of the sound wave is:

Text solutionVerified

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