What is the length of a simple pendulum, which ticks seconds ?

Options

A. 2m
B. 1 m
C. 4 m
D. 3 m

Answer

B

Explanation

The time period of a simple pendulum is,
`T= 2pi sqrt((l)/(g))(or) l=(gT^(2))/(4pi^(2))`
The time period of a simple pendulum, which ticks seconds is 2 s.
`:.l=((9.8, ms^(-2))(2s))/(4pi^(2)=1m`