What is the relation between applied voltage and emf induced with respect to flux wave?

Under no load condition and considering no losses

  • Induced emf in both primary and secondary lags behind the main flux by 90 deg.
  • Applied voltage to primary winding leads the main flux by 90 deg and is in phase opposition with the induced emf in the primary winding (V1= -e1)
  • Secondary voltage V2=e2 as there is no voltage drop in the secondary.