A standing wave is formed by the superposition of two waves travelling in opposite directions. T....

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A standing wave is formed by the superposition of two waves travelling in opposite directions. The transverse
P
displacement is given by
\[
y(x, t)=0.5 \sin \left[\left(\frac{5 \pi}{4} x\right)\right] \cos (200 \pi t)
\]

Frequency of wave is
(1) \( 50 \mathrm{~Hz} \)
(2) \( 100 \mathrm{~Hz} \)
(3) \( 150 \mathrm{~Hz} \)
(4) \( 200 \mathrm{~Hz} \)


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