induction

Hi dear,

The transformer is based on two principles: firstly, that an current can produce a magnetic field and secondly that a changing magnetic field within a coil of wire induces a voltage across the ends of the coil). Changing the current  in the primary coil changes the magnetic flux that is developed. The changing magnetic flux induces a voltage in the secondary coil.

currentpassing through the primary coil creates a magnetic field. The primary and secondarycoils are wrapped around a coreof very high magnetic permeability, such as iron, so that most of the magnetic flux passes through both the primary and secondary coils.

Hope this helps.

Regards

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