A transformer is an electrical device that transfers electrical energy between two or more circuits using electromagnetic induction.
What it does:
* Steps up voltage (e.g., at power plants for transmission)
* Steps down voltage (e.g., before electricity enters your home)
* Primary coil
* Secondary coil
* Magnetic core
When alternating current (AC) flows through the primary coil, it creates a changing magnetic field. This induces a voltage in the secondary coil.