Question

The ferrite  cores are used for ____________ transformers.

(a) Small transformers

(b) Medium transformers

(c) Large transformers

(d) Medium and small transformers

This question was addressed to me in class test.

My question comes from Effect of Starting on Power Supply, Motor and Load topic in division Starting of Electric Drives

Answer 1

Correct option is (a) Small transformers

To explain I would say: Ferrite cores are used for cores of small transformers used in communication circuits at high frequencies and low energy levels. Because ferrites have high resistivity they will have lower eddy current losses.