The equation T = 2 l/g is valid only when

MHT CET Physics question

The equation is valid only when

(A)the length of the pendulum is less than or equal to the radius of the earthCorrect
(B)the length of the pendulum is greater than or equal to radius of the earth
(C)independent of the radius of the earth
(D)none of these

Answer: (A)

The formula assumes is constant over the pendulum, which holds when is small compared with the earth's radius; for

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Question ID VK-067822