Why transformer can only be used in AC circuit but not DC circuit?

Question

Why transformer can only be used in AC circuit but not DC circuit?

Answer 1

A transformer is used to transfer energy from one alternating circuit (ac) to another alternating circuit with a change of voltage, current, impedance or phase. While an inverter is used to transform dc power to ac power. You might be wondering how we produce dc from ac. We use the rectifier to transform the ac power to dc power...

Answer 2

if dc supply is given to transformer there will be no

change in the flux with time.so there is no emf induced in

the primary and secondary windings.and hence tranformer

action will not take place.

Answer 3

If you energize a DC circuit containing a transformer there will be a single surge through the transformer transferring energy from the primary to the secondary windings then there will be steady state with no energy transfer.  Only changes to the voltage and current of the primary are reflected in the secondary and AC power meets this requirement.  If you open and close the DC circuit there will be only a transient effect (like the coil that fires car spark plugs as the distributor makes and breaks the DC circuit).