SATHEE: Waves - Result Question 32

Waves - Result Question 32

32. Velocity of sound waves in air is $330 m / s$ . For a particular sound wave in air, a path difference of $40 c m$ is equivalent to phase difference of $1.6 π$ . The frequency of this wave is

(a) $165 H z$

(b) $150 H z$

(d) $330 H z$

[1990]

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Answer:

Correct Answer: 32. (c)

Solution:

$λ = 2 π \frac{Δ x}{Δ ϕ} = \frac{2 π (0.4)}{1.6 π} = 0.5 m$

$f = \frac{v}{λ} = \frac{330}{0.5} = 660 H z$

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Waves - Result Question 32

32. Velocity of sound waves in air is 330m/s. For a particular sound wave in air, a path difference of 40cm is equivalent to phase difference of 1.6π. The frequency of this wave is

Answer:

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32. Velocity of sound waves in air is $330 m / s$ . For a particular sound wave in air, a path difference of $40 c m$ is equivalent to phase difference of $1.6 π$ . The frequency of this wave is