Before getting onto How Does Transformer works, we shall begin with brief description of transformer. A Transformer is a static device comprising coils coupled through a magnetic medium Connecting two poles of different voltages in an electric system along the interchange of electrical energy amid ports in both the direction via the magnetic field. The transformer is one of the most important component in variety of electrical circuits ranging from low power, low current electronic and control circuit to Ultra High Voltage power system. Functions of transformers Working Changing voltage and current level in electric power systems.Matching source and load impedance for maximum power transfer in electronic and control circuitry.Electrical isolation. Internal coils of transformer When the electric current passes through a long, hollow coil of