how does a power transformer work?

A power transformer operates on the principle of electromagnetic induction to transfer electrical energy between two or more circuits. It consists of primary and secondary windings wrapped around a magnetic core. When alternating current flows through the primary winding, it creates a magnetic field that induces a voltage in the secondary winding. This allows for voltage transformation-either stepping up or stepping down voltage levels-while maintaining power conservation, making it essential for efficient power distribution in electrical systems.