A magnet is suspended horizontally in the earth's magnetic fleld. When it is displaced and then released, it oscillates in a horizontal plane with a period T. If a piece of wood of the same moment of inertia (about$$ the axis of $$rotation) as the magnet is attached to the magnet, what would the new period of oscillation of the system?

Question

Infinity Learn · Accepted Answer

Due to wood moment of inertia of the system becomes twice but there is no change in magnetic moment of the system. Hence,$$T=2$$$$π$$IMBH⇒T∝I⇒T'$$=2$$ T

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