Q: If T_{1} , T_{2} and T_{3} 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) T_{1} = T_{2} = T_{3}

(b) T_{2} <T_{1} > T_{3}

(c) T_{2} > T_{1} < T_{3}

(d) T_{1} > T_{2} > T_{3}

Ans: (c)