Question

Time period of a simple pendulum depends on :

• A. Mass of bob
• B. Length of string
• C. Dimension of bob
• D. Material of the bob

Answer 1

The correct option is B Length of string

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