Describe the basic construction of a transformer with a neat sketch.

A transformer is an essential electrical device used to transfer electrical energy between two or more circuits through electromagnetic induction. It operates on the principle of Faraday’s law of electromagnetic induction, which states that a changing magnetic field induces an electromotive force (EMF) in a coil.

### Basic Construction of a Transformer  
A transformer consists of the following main components:

1. Core:  
   - The core is made of laminated silicon steel sheets to reduce eddy current losses and improve efficiency.  
   - It provides a low-reluctance path for the magnetic flux generated between the primary and secondary windings.  
   - The laminations are insulated from each other to minimize energy loss due to eddy currents.

2. Windings:  
   - A transformer has two main windings: the Primary Winding and the Secondary Winding.  
   - The Primary Winding is connected to the input power source, where an alternating current (AC) is applied. This produces a magnetic field in the ___ ____ ____ ______ ________.
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