What is Inductor?. Types of Inductors. Air Core Inductor. Ferromagnetic/Iron Core Inductor. Ferrite Core Inductor. Iron Powder Core Inductors. Ceramic Core Inductors. Laminated Steel Core Inductor. Toroidal Core Inductor. Drum/Bobbin Core Inductor. Multi-Layer Inductor. Thin Film Inductor. Molded Inductor. Coupled Inductor. Power Inductor. Radio-Frequency RF Inductor. Chokes. Variable Inductors: