In a spring block system if length of the spring is increased by `4%`, then time period

Options

A. increase by 2%
B. increase by 0.5%
C. decrease by 2%
D. decrease by 0.5%

Answer

A

Explanation

`T alpha (1)/(sqrt(K)), K alpha (1)/(l) = T alpha sqrt(l)`
`(Delta T)/(T) % = (1)/(2) (Delta l)/(l)%" "(1)/(2) xx 4 = 2%`