Why transformers don't work on DC supply?
Before we get into topic, we have to know about some basic concept related to Transformers. As you know that the transformer work on Faraday's law of electromagnetic induction that's why we will discuss about flux linkages and EMF first. "Faraday's law states that, whenever there is relative space or time variation between magnetic field and set of conductors and EMF will be induced in the conductors." By this definition we know that the generation of EMF is possible only if there is space time variation between magnetic field and set of conductors, as we know that this principle applies in motors and Transformers. In dc generators the EMF induced in set of of conductors due to relative space variation with respect to steady magnetic field is called dynamically induced EMF. And for Transformers the EMF induced in the set of stationary conductors due to relative time variation with respect to magnetic field called statically induced EMF . EMF