State four important properties of a bar magnet.

Important properties of a bar magnet are following :

1. A bar magnet attracts materials like iron, nickel, cobalt, and some alloys.
2. A bar magnet has two poles (i.e., a north pole and a south pole) which are located near the ends of the magnet.
3. In a bar magnet, like poles repel and unlike poles attract.
4. When a bar magnet is suspended freely, it always points in the north–south direction, which is the principle behind the magnetic compass.