Question

A string is rigidly tied at two ends and its equation of vibration is given by y = cos 2π t sin 2πx. Then minimum length of string is 

(a) 1 m

(b) 5/2 m

(c) 5 m

(d) 2πm

Answer 1

Correct option: (b) 5/2 m

Explanation:

On comparing with standard equation, we get,

So the length of the string will be in integral multiple of 0.5, which is 2.5 m.