Electromagnetic Induction and Alternating Current: Transformer — Core Lamination MCQ

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Transformer — Core LaminationMediumQuestion 20247

Question

If a transformer core is made of laminations 0.1 mm thick instead of a solid core, eddy current losses:

A
Increase 100×
B
Decrease approximately 10,000×
Correct
C
Stay the same
D
Increase 10×

Correct answer

Decrease approximately 10,000×

Explanation

Eddy current loss ∝ (thickness)². Reducing thickness by 100× (from 1 cm solid to 0.1 mm = 0.01 cm, a factor of 100) reduces loss by 100² = 10,000. This is why high-efficiency transformers use very thin laminations.

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