Types of inductors: i) Air cored inductor ii) Iron cored inductor iii) Ferrite cored inductor
Air cored inductor: These are used for high frequency application e.g. Radio sets, wave traps, Induction heaters etc.
Iron cored inductor: These are basically used for low frequency applications such as filters, chokes, amplifiers and other d.c. applications.
Ferrite cored inductor: These are used for many high frequency applications such as carrier telephony, domestic television receivers, domestic radio receiver, wide band pulse transformers, oscillators, signal generators, high frequency amplifiers, etc.