Question

Hysteresis loss is minimized using

• A. soft iron core
• B. soft iron core with 4% Si
• C. cobalt core
• D. ferrite core
• E. radiomental

Answer 1

Answer: (B)

soft iron core with 4% Si

In order to reduce the eddy current losses, most low-frequency power transformers and inductors use laminated cores, made of stacks of thin sheets of silicon steel. Material with high permeability and low coercivity is used to have a core with low hysteresis loss and low flux leakage. Silicon steel i.e. soft iron with 4% Si is the alloy having low coercivity and high magnetic permeability fit for the transformer core.

$⟹$ correct answer is B.