A bar of magnetic moment `2.5 Am^(2)` is free to rotate about a vertical axis through its centre  .
Channel: Doubtnut
Date: 2020-08-23

A bar of magnetic moment `2.5 Am^(2)` is free to rotate about a vertical axis through its centre  . The magnet is released from the rest from the east - west direction . Find the kinetic energy of the magnet as it aligns itself in the north - south direction . The horizontal component of earth's magnetic field is `0.3 G`