Simple pendulum is executing simple harmonic motion with time period `T`. If the length of the pendulum is increased by `21%`, then the increase in the time period of the pendulum of the increased length is:

Options

A. 0.5
B. 0.4
C. 0.2
D. 0.1

Answer

D

Explanation

`(T_(2))/(T_(1)) = sqrt((L_(2))/(L_(1))) =1.1 therefore T_(2)-T_(1)=0.1 T=10%`