Question

Q15: The time period of a simple pendulum at the centre of earth is:
2 points
O (a) zero
O (b) infinite
O (c) less than zero
0 (d) none of these
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Answer 1

the answer is zero because the pendulum rotate from the middle and move only one side then come back from the actual place

Answer 2

Explanation:

hAcceleration due to gravity at the center of the earth is zero.

⟹g=0

Time period of a simple pendulum is given by, T=2π

g⟹T=2π

0∴T=∞

So time period at the centre of the earth becomes infinite.

Hence ,option(a) is correct