PPT Slide
The induced voltages are, by Faraday’s law, e1 = N1df/dt and e2 = N2df/dt (polarities governed by Lenz’s law)
Under AC steady-state conditions, the RMS voltage phasors E1 and E2 are related by E1/E2 = N1/N2 = a where a is referred to as the voltage turns ratio and ...
Each induced (coil) voltage’s RMS magnitude is given by:
|E| » 4.44fNfmax. (which is the so-called emf equation)
Section 12.7: Principle of Operation of a Transformer