|Class 12 Physics Magnetism and Matter||Introduction|
Magnetism is the phenomenon due to which certain substances attract pieces of steel, iron, nickel etc.
Magnets are used in many devices like electric bell, telephone, radio, loud speaker, motors, fans, screw drivers, lifting heavy iron loads, super-fast trains especially in foreign coutries, refrigerators etc.
Magnetite is the world’s first magnet. This is also called natural maget. Though magnets occur naturally, we can also impart magnetic property on a substance. It would be an artificial magnet in that case.
History of magnets