What is the actual force of magnetism?
The actual force of magnetism is the attraction or repulsion of force that is exerted between poles of a magnet and moving particles that are electronically charged Kübler, 2017).
Why are two permanent magnets attracted to each other?
This is because of magnetostatic where some magnetic force lines go out (N pole) or go into (S pole) (Kaneyoshi, 2018). The permanent magnet attracts because there are magnets that imply that there is the current density. Therefore, the magnet attracts because the current does.
What is the relationship between a permanent magnet and the Earth?
The Earth is a magnet therefore it behaves as a magnet. It is an electromagnet but not a permanent magnet (Kaneyoshi, 2018). At the bottom of the earth, molten metals flow due to heat that brings about convection. The flow arranges itself into patterns that create magnetism. Similar knowledge is applied in the dynamo which develops both electric current and magnetism from motion conductors.
Why are certain materials more magnetic than others?
The properties of magnets are ruled by the configuration of electrons in that material(Kübler, 2017). There are two kinds of electrons in conductors: free and bound electrons. Free electrons move freely between atoms while bound don’t move. Some metals are full of tinier magnets hence are attracted to magnets.
References
Kaneyoshi, T. (2018). Amorphous magnetism. CRC press.
Kübler, J. (2017). Theory of itinerant electron magnetism (Vol. 106). Oxford University Press.