Question

Explain the construction of transformer.

Answer 1

Principle:

The principle of a transformer is the mutual induction between two coils. That is, when an electric current passing through a coil changes with time, an emf is induced in the neighbouring coil.

Construction of transformer

Construction:

1. In the simple construction of transformers, there are two coils of high mutual inductance wound over the same transformer core.
2. The core is generally laminated and is made up of a good magnetic material like silicon steel. Coils are electrically insulated but magnetically linked via transformer core.
3. The coil across which alternating voltage is applied is called primary coil P and the coil from which output power is drawn out is called secondary coil S.
4. The assembled core and coils are kept in a container which is filled with suitable medium for better insulation and cooling purpose.