FAQ | Apr 07,2023
A step-down transformer is a device that is designed to reduce the voltage of an alternating current (AC) while increasing the current. The transformer accomplishes this by using two coils of wire wound around a common iron core. The coil with more turns is called the primary winding, and the coil with fewer turns is called the secondary winding.
When an AC voltage is applied to the primary winding, it creates a magnetic field in the iron core, which in turn induces a voltage in the secondary winding. The voltage induced in the secondary winding is proportional to the number of turns in the secondary winding, and is lower than the voltage in the primary winding due to the difference in the number of turns.
As the voltage is reduced in the secondary winding, the current is increased proportionally according to the conservation of energy. However, the current in the primary winding remains the same because the power input to the transformer is equal to the power output. Therefore, the step-down transformer does not reduce the primary current, but rather increases the secondary current proportionally to the reduction in voltage.
It is important to note that the step-down transformer only reduces the voltage and increases the current in the secondary winding, while the power output (the product of voltage and current) remains the same as the power input.
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