What is principle of Transformer?

Question

Accepted Answer

Transformer works on the principle of electromagnetic induction to transfer electrical energy from one circuit to another.

Transformers have two coils, primary and secondary, which are wound around a common magnetic core.
When an alternating current flows through the primary coil, it creates a magnetic field that induces a voltage in the secondary coil.
The voltage induced in the secondary coil is proportional to the number of turns in the coil and the rate of change of the magnetic field.
Transformers are used to step up or step down voltage levels in power transmission and distribution systems.
They are also used in electronic devices to isolate circuits and match impedance.