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Transverse & Longitudinal Waves

Consider a si...

Question

Consider a sinusoidal travelling wave shown in the given figure. The wave velocity is $+ 40 c m / s$ . Find the frequency of the wave.

20 H z

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30 H z

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25 H z

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10 H z

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Solution

The correct option is D $10 H z$
Given:
Velocity of wave , $v = 40 c m / s$
$λ = 2 (4.5 - 2.5) = 4 c m; v = n λ$
$\Rightarrow n = \frac{40}{4} = 10 H z$

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