Question

What time period of simple pendulum at center of earth

Answer 1

since at the centre of the earth the value of g is zero therefore the time period of Pendulum is zero

Answer 2

Time period of a simple pendulum is given by. T = 2π√(l/g) => T = 2π√(l/0) => T = ∞ So time period at the centreof the earth becomes infinite.