A standing wave is represented by y = Asin (100t) cos (0.01x),

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A standing wave is represented by y = Asin (100t) cos (0.01x), where y and A are in millimetre, t in seconds and x is in metre. Velocity of wave is

1. 10⁴ m/s
2. 1 m/s
3. 10^-4 m/s
4. not derivable from above data

Correct Option: A

The wave equation is y = Asin (ωt)cos (kx);
c = ω/k = 100/0.01 = 10⁴ m/s.