Why does a magnet rests in north south direction?

A magnet rests in a north-south direction because it aligns itself with the Earth's magnetic field. The Earth acts like a giant magnet with its magnetic north pole located near the geographic north pole and its magnetic south pole near the geographic south pole. When a magnet is placed on the surface of the Earth, it aligns itself with the Earth's magnetic field, causing one end of the magnet to point towards the magnetic north pole and the other end to point towards the magnetic south pole. This is why a magnet naturally rests in a north-south direction.

A magnet rests in the north-south direction because of the Earth's magnetic field. The Earth's magnetic field is caused by the movement of molten iron in the Earth's core. The magnetic field lines run from the Earth's magnetic north pole to the Earth's magnetic south pole. When a magnet is placed in the Earth's magnetic field, it aligns itself with the field lines. The north pole of the magnet points towards the Earth's magnetic north pole, and the south pole of the magnet points towards the Earth's magnetic south pole.