Answer Posted / shiva
the transformer Works on variable flux(A.c. flux, rms value
is const) if we give dc input the flux generated is
stationary and cannot devolp the induced emf in primary(E1)
&secondary(E2)...so there is no opposition of current flow
in primary & Secondary(since E1,E2=0).....there fore high
currennt passes through windings ...so that wdg may damage
to such high currents...
Another way of explination
transformer core material works on some const magnetic flux
density..in some range... but if give dc in put its
frequency is zero. So
B=V/F ===)B=v/0 ===)B~~ infinate value...requred such
material is not possible practically
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