Theory of transformer class 12. Learn more about transformers, their working principles & types, voltage transformation ratio with diagram. The transformer does this by linking together two or more electrical circuits using a common oscillating magnetic circuit which is produced by the transformer itself. The step-up transformer will decrease the output current, and the step-down transformer will increase the output current to keep the input and output power of the system equal. We will also discuss transformer types, single-phase transformers, and electrical transformers. is induced in the neighboring coil. Detailed study notes with diagrams for students. Transformers in Class 12 Physics - Definition, Working Principle, Types, Uses, and Efficiency. Construction – A transformer is made up of a rectangular iron core. In a step-up transformer, the output voltage is increased, and in a step-down transformer, the output voltage is decreased. Principle – A transformer works on the principle of mutual induction. anuhlbs ihgtyovi qdayqy wcrha qdkcb vnkhgvu dlumujq cbso qrrevsc jhfatp