Magnetism: B-H Loop — Transformer MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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B-H Loop — TransformerMediumQuestion 20238

Question

A good transformer core material should have a B-H loop that is:

A
Wide with large area
B
Narrow with small area (low hysteresis loss)
Correct
C
Very tall (high saturation B)
D
Horizontal (zero coercivity)

Correct answer

Narrow with small area (low hysteresis loss)

Explanation

Transformer cores must undergo millions of B-H cycles. A narrow loop means low energy loss per cycle → low heating. Soft iron and silicon steel have narrow loops.

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