Introduction
A transformer can be described as an electrical device capable of transferring energy between two or more circuits by employing induction. Electromagnetic induction is the principle of operation and was discovered simultaneously and independently by Joseph Henry and Michael Faraday back in 1831. The first working transformer dates back to 1876 created by a Russian engineer Pavel Yablochkov.
How Does A Transformer Work?
A transformer works on the principle of electromagnetic induction. It has two coils/windings known as primary coil/winding and secondary coil/winding. Applying a varying current to the primary coil results in the formation of a magnetic flux in the core that is varying and this imparts a varying magnetic field to the secondary coil and induces an electromotive force in the secondary coil. 
Types Of Transformer
- Autotransformer
- Capacitor voltage transformer
- Distribution transformer, power transformer
- Phase angle regulating transformer
- Scott-T transformer
- Polyphase transformer
- Leakage transformer
- Resonant transformer
- Audio transformer
- Output transformer
- Instrument transformer
Applications Of Transformer
- Chargers
- Televisions
- Laptops
- Grid Stations
- Electric Lines
- Home Appliances
Precautionary Measures
- Make sure there is another person working with you who can help you in case you receive electric shock and vice versa.
- Unless absolutely necessary, never work with energized circuits.
- Make sure you’re insulated from Earth.
- Make sure you’re wearing gloves.
- Wear Safety goggles.
- Make sure you work with one hand and the other hand is not in vicinity of any such thing which you could potentially complete the circuit.