Upon completion of this lesson, student must be able to:
Magnets are generally of two types: natural magnets and artificial magnets. Molecular theory of magnetism states, "If molecular magnets align in a row, then the substance exhibits magnetic property. Using this principle artificial magnets are created. This lesson deals with the properties of the magnet and the molecular theory of magnetism.
Magnetic induction is the process by which substances like iron are magnetised by the magnetic field. Demagnetization means decreasing magnetic property or losing it completely. This note provides us with an information about the magnetising of a magnetic substance and demagnetizing magnets.