A plane progressive wave is given by The frequency of the wave is

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Solution

Q.
A plane progressive wave is given by $y = 2$ $\cos$ $2 π (330 t - x) m .$ The frequency of the wave is [2024]

1 340 Hz

2 165 Hz

3 330 Hz

4 660 Hz

Ans.
(3)

$y = 2$ $\cos$ $2 π (330 t - x) m$

$y = A$ $\cos$ $(ω t - k x)$

Comparing $ω = 2 π \times 330$

$2 πf = 2 π \times 330 \Rightarrow f = 330$ $H z$

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