A simple pendulum of length 1m is taken to height R (radius of the earth) from the earth’s surface. The time period of small oscillation of the pendulum at that point is

value of g at a height h    gR2R +h2 heere h=R  and g becomes g4 time period of oscillation of a pendulum T=2πlg original time period  2 sec and if g decreases to g4 time period increase to two times i.e, it will be 4 sec