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The equation of a wave travelling in a string can be written as y = 3 cos {π(100t – x)} where y and x are in cm and t is in seconds.

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The equation of a wave travelling in a string can be written as y = 3 cos {π(100t – x)} where y and x are in cm and t is in seconds. Then the value of wavelength is …….

(a) 100 cm 

(b) 2 cm 

(c) 50 cm 

(d) 4 cm

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Correct answer is (b) 2 cm

On comparing given equation with y = A cos (kx - ωt), we get

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