Step Up & Step Down transformers எப்படி வேலை செய்கிறது? 

#step up Transformers
#step down Transformers
#classification of Transformers
types of transformers in tamil
what is step up transformer in tamil,
what is step down transformer in tamil
how does works step up and step down transformers
stepup transformer working
step down transfomer working
classification of transformers
What are the main types of transformers?
The different types of transformer
The various types of transformer
Types of transformer and their uses
what are the two main types of transformers