A magnet usually contains two magnetic poles, north and south. Similar magnetic poles, like north and north or south and south, repel each other with force. Dissimilar poles, like north and sough, attract each other with force.
Only nickel, iron and cobalt are attracted to magnets so they are known as ferromagnetic metals.
The Domain theory states that all large magnets are made up of many smaller and rotatable magnets, known as dipoles. Dipoles can ineract with other dipoles close by. If dipoles line up, then a small magnetic domain is produced.
Oersted's Principle: Charge moving through a conductor produces a circular magnetic field around the conductor.
No comments:
Post a Comment