(i) Magnetic flux leakage - It can be reduced by winding the primary and secondary coils one over the another.
(ii) Ohmic loss due to the resistance of the windings (wires) - It can be reduced by using thick copper wires.
(iii) Eddy current loss- It can be minimised by laminating and insulating the core of the transformer.
(iv) Hysteresis loss - It can be minimised by using material(soft iron) which has a low hysteresis loss.
