For a simple pendulum, the relation between the periodic time 'T', the length of the pendulum 'l' and the acceleration due to gravity 'g' is given by

• A. T = 2π ( l ⁄ g )
• B. T = 2π ( l ⁄ sqrt(g) )
• C. None of the above
• D. T = 2π sqrt(l) ⁄ g