DC Generator

AC Generator (Alternator)

Motor

 

            A transformer is a static piece of apparatus by means of which electric power in one circuit is transformed into electric power of the same frequency in another circuit. It can raise or lower the  voltage in a circuit but with a corresponding decrease or increase in current.

      Principle :

    

         

 

In brief, a transformer is a device that

                    transfers electric power from one circiut to another.

 

                    it does so without a change of frequency.

 

                    it accomplishes this by electromagnetic induction and

 

                    where the two circuit are in mutual inductive influence of each 

                        other.           

 

 

Working of Transformer

E.M.F. Equation of a Transformer Voltage Transformation Ratio ( K )