The direction of magnetic lines of force of a bar magnet is from north to south pole outside the magnet and from south pole to north pole inside the magnet . Magnetic field lines outside a permanent magnet always run from the north magnetic pole to the south magnetic pole. Therefore, the magnetic field lines of the earth run from the southern geographic hemisphere towards the northern geographic hemisphere.
- A bar magnet has properties similar to any permanent magnet.
- It has a north pole and a south pole at two ends.
- If this magnet is suspended freely in the air with a thread, it will not come to rest until the poles are aligned in a north-south position. A Mariner’s Compass uses this property to determine direction.
- The magnetic force of it is the strongest at the pole.