A transformer is a static electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. It is commonly used to increase or decrease voltage levels between circuits, enabling efficient electrical power transmission and distribution.

Key aspects of transformers:

• Principle of Operation: Transformers operate on the principle of Faraday's law of electromagnetic induction. A changing magnetic field produced by the primary winding induces a voltage in the secondary winding.
• Construction: Transformers typically consist of two or more coils of wire (windings) electrically isolated but magnetically linked, often wound around a ferromagnetic core.
• Types: There are various types of transformers, including step-up transformers (increase voltage), step-down transformers (decrease voltage), isolation transformers (provide electrical isolation), and autotransformers (single winding transformers).
• Applications: Transformers are widely used in power transmission and distribution systems, electronic devices, and various industrial applications to efficiently manage voltage levels and provide electrical isolation.

For more in-depth information, you can refer to these resources:

• Electrical4U - Transformer
• All About Circuits - Transformers