Question

A magnet is suspended horizontally in the earth's magnetic field when slightly displaced

Answer 1

A magnet is suspended horizontally in the earth's magnetic field. When slightly displaced, it oscillates in the horizontal plane with a period T. If a piece of wood having the same moment of inertia as the magnet is attached to the magnet, the new period of oscillation of the combination is 1) T/√2 2) T/2 3) T√2 4) 2T