Transformer is made up of which material and why? What is the magnetic field has to do with a transformer and how it works???
Most transformers have windings of copper wire, and a ferromagnetic core material. That is usually soft iron, stalloy, or ferrite. The magnetic field is formed by energising the transformer primary winding, and is coupled via that core material to the secondary winding, where it induces a current in the secondary winding.
