An electrical transformer is a device used to convert one alternating current (AC) voltage to another. It works by using electromagnetic induction, which involves using two or more coils of wire wrapped around an iron core or other type of element. Electrical energy is transferred between the coils as they interact with each other’s magnetic fields. Transformers come in many shapes and sizes, depending on their application. However, all transformers work based on Faraday’s Law of Induction; when a changing current passes through one coil, it produces an electromotive force (EMF) that induces a voltage in the second coil. This process allows electricity generated at power plants to be transmitted over long distances and stepped down into usable voltages for homes and businesses.