Concept:Ferrites are ceramic magnetic materials made by combining iron oxide with other metal oxides.
Explanation:Ferrite is produced from the chemical combination of metal oxides such as iron(III) oxide (
Fe2O3) and oxides of metals like barium or strontium.
It is a ferromagnetic ceramic compound, not a metal.
Ferrite has very high electrical resistance, so it resists the flow of electric current strongly.
Because of this high resistance, eddy current losses are very low at high frequencies.
Paramagnetic, ferromagnetic, and diamagnetic substances do not fit this specific description of being formed from metal oxides with very high resistance.
Answer:A. ferrite substance