Working principle of Transformer: Tap to view working principle of Transformer (In Hindi) Transformed works on the principle of Faraday's law of mutual induction, which states that whenever a flux linking to a coil changes, it produces a varying flux in the nearby placed coil similar in characteristics and hence an induced E.M.F. is produced in coil. The magnitude of the E.M.F. depends upon the number of turns of the coil. # General constructional features of transformers:- Transformers have the following general constructional features:- A ) Internal construction . •Winding coils (primary and secondary). •Core for providing path for magnetic flux linkage. •Buchholz relay. What is bucchloz relay? How does it work? B ) External construction . •Main housing with cooling tubes. •Conservators. ...