A current I = I₀ sinωt flows in the primary winding of the transformer. The magnetic flux generated by this current passes almost completely through the iron core of the transformer. Magnetic permeability of the core µ. Determine the induction EMF in the secondary open winding, if the number of turns in the primary winding is N₁, and in the secondary winding N₂. What is the voltage applied to the primary winding? Transformer core cross-section S. Effective core length l.
282