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CGP EDU Academic Team
Published on: September 12, 2026
The equation of a wave travelling in a string can be written as $y = 3 \cos \pi (100t - x)$ . Its wavelength is
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Verified by ExpertsThe correct answer is:
B
Comparing the given equation with $y = a \cos(\omega t - kx)$
We get $k = \frac{2 \pi}{\lambda} = \pi$ ⇒ ⇒ λ λ = 2cm
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