Why Transformer Cannot work on DC Supply?

All Reasons why the Transformer cannot work on DC Supply.

This is a very important and frequently asked question that Why Transformer Cannot work on DC Supply? Today we are going discuss about it. To better understand this topic you should know about Faraday's Law. So let's start,

The Transformer cannot work on DC supply because,

When DC supply is given to the primary winding of the transformer, current flows through the winding, and as a result, flux is also produced. As in the case of DC, the magnitude, and direction of the current do not change with time it remains constant. So the produced flux that linked both windings also does not change. According to Faraday's law when the flux linking with the conductor changes the EMF will be induced on that conductor. As in this case, flux does not change so the EMF also is not produced.

     At the time when the switch gets ON the magnitude of the current increases from zero, the flux will be changed and EMF will be produced. 

Again at the time when the switch gets OFF the magnitude of the current reduces to zero, the flux will be changed and EMF will be produced.

But for both cases, time is very short. It is clear that a Transformer cannot work on a DC supply. 

Now there is a problem that if the DC supply is given to the transformer its winding will be burned. Because the winding of the transformer has very low resistance. In the case of AC, as there EMF is produced which limits the current flowing through the coil. But in the case of DC, there is no EMF produced so a huge amount of current will flow through the coil and the coil will be burned.  

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