A transformer takes electrical current from one circuit and transfers it to another. It can either step up (increase) or step down (decrease) the voltage from an electrical circuit without changing its frequency. This “transforms” the voltage into what it needs to be to power devices that require either a stepped-down or stepped-up current to function. For example, a 120V device can utilize a transformer to function with a 230V input or vice versa.
Every transformer has a core that can be categorized as either iron or air. In an iron core transformer, flux is produced through a linkage path with windings wound on stacked iron plates. An air-core transformer uses a coil placed on a non-magnetic strip. Instead of being wound around iron plates, the flux linkage is created by winding it through the air.
Transformers can only alter AC current...
