Answer Posted / baljinder singh

First of all ,when we give the dc supply to
transformer,flux set up around the winding or in core ,but
this flux is statoinary and not link with winding so there
is not produce the back emf .The resistence of primary is a
few ohm(1-5).According to ohm law I=V/R .
When voltage applied across ,the back emf is not
produce ,resistence is very low ,so heavy current flowing
throw it .The winding will burn.

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