A step-down transformer is an electrical device that reduces the voltage of an alternating current (AC) power supply. It consists of a primary winding, a secondary winding, and an iron core. When an AC voltage is applied to the primary winding, it creates a fluctuating magnetic field in the iron core. This magnetic field then induces a voltage in the secondary winding but at a lower voltage level than the primary winding. A transformer works on the mutual induction principle, also known as Faraday’s Law of Electromagnetic Induction, which states that the magnitude of voltage is directly proportional to the rate of change of magnetic ,flux .
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