Question

(a) Explain how laminating the core of a transformer helps to reduce eddy current losses in it.

(b) Why the primary and secondary coils of a transformer are preferably wound on the same core.

Answer 1

(a) Laminations are thin, making the resistance higher. Eddy currents are confined within each thin lamination. This reduces the net eddy current.

(b) For maximum sharing of magnetic flux and magnetic flux per turn to be the same in both primary and secondary.