Q: If T1 , T2 and T3 are the time periods of a given simple pendulum on the surface of the earth, at a depth ‘h’ in a mine and at an altitude ‘h’ above the earth’s surface respectively, then
(a) T1 = T2 = T3
(b) T2 <T1 > T3
(c) T2 > T1 < T3
(d) T1 > T2 > T3
Ans: (c)