Q 11-13-026NEETJEE MainEasy
If the length of a simple pendulum is increased by $44\%$, its period increases by
Answer: (D) $20\%$
Concept. $T \propto \sqrt l$.
Step 1. Ratio. $\sqrt{1.44} = 1.2$: an increase of $20\%$.
Answer. $20\%$ (Option D).
Solution by Sreeraj P, M.Sc Physics