Question

Periodic time of a simple pendulum depends on :

• A. The mass of pendulum bob
• B. The collective mass of pendulum bob and thread
• C. The length of pendulum
• D. None of above

Answer 1

The correct option is C The length of pendulum

Time period of second pendulum is given by $T=2\pi \sqrt{\frac{l}{g}}$
where $l$ is the length of pendulum and $g$ is the acceleration due to gravity.
$⟹T\propto \sqrt{l}$
Thus periodic time of a simple pendulum depends on th elength of pendulum.