Physical Pendulum Period Ratio

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A physical pendulum consists of two identical thin rods, each with mass m and length L, attached perpendicularly to form an ‘L’ shape. The pendulum pivots about the free end of one rod. What is the ratio of the period of this physical pendulum to the period of a simple pendulum of length L?

$\sqrt{\dfrac{3}{2}}$

$\sqrt{2}$

$\sqrt{\dfrac{4}{3}}$

$\sqrt{\dfrac{5}{3}}$

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