Magnetism is the property of how a material responds when subjected to a magnetic field. The magnetic field is a change in energy within a volume of space. The molecules in a magnet are aligned to all face one way, which gives the magnet its magnetic field. Sometimes the molecules can align permanently, making a permanent magnet, a permanent magnet is typically a ferromagnetic material, such as iron. Temporary magnets molecules only line up for...
Magnetism is the property of how a material responds when subjected to a magnetic field. The magnetic field is a change in energy within a volume of space. The molecules in a magnet are aligned to all face one way, which gives the magnet its magnetic field. Sometimes the molecules can align permanently, making a permanent magnet, a permanent magnet is typically a ferromagnetic material, such as iron. Temporary magnets molecules only line up for a period before losing their magnetism. The length of the time they are aligned varies. If it’s suspended freely, a permanent, the magnet will rotate itself in a direction which matches the earth’s magnetic field. One way to see the magnetic field is to experiment with the bar magnet, iron filing, and a card.
Properties of magnetic field lines
They always form closed loops.
No two magnetic lines intersect.
Outside they seem to travel from north to south and inside south to north.
They leave the North Pole and enter the South Pole normally.
It is a vector quantity.
The magnetic field lines are crowded near the pole where the field is strong and far from the magnet where the field is weak.
In case the field lines are parallel and equidistant, they represent a uniform magnetic field. The Earth’s’ magnetic field is uniform limited space.
