Electronic Transformers and Circuits is a free introductory textbook on transformers and related circuits. See the editorial for more information....

Turns Ratio

The coupling between the coils in some transformers is so tight that the primary and secondary voltages bear almost exactly the same ratio to each other as the turns in the respective coils or windings. Thus the turns ratio N1/N2 of a transformer is a common index of its function in raising or lowering voltage.

Last Update: 2008-02-24