The length of a simple pendulum executing simple harmonic motion is increased by 21%. The percentage increase in the time period of the pendulum of increased length is [AIEEE 2003]
A) \[11%\]
B) \[21%\]
C) \[42%\]
D) \[10.5%\]
Correct Answer:
D
Solution :
[d] The time period of simple pendulum is given by