A bar magnet of magnetic moment 2Am is free to rotate about

Last updated: 6/24/2023

A bar magnet of magnetic moment 2Am is free to rotate about a vertical axis passing through its centre The magnet is released from rest from east west position Then the K E of the magnet as it takes north south position is B 25 T H 1 25 J 2 50 J 3 100 J 4 12 5