TransformersQuestion 1131 of 1506

Why is a transformer core made of thin insulated sheets?

To limit eddy currents and the heat they cause
To raise the hysteresis loss so the core runs warmer
To increase the winding resistance and limit inrush
To make the core material magnetic in the first place

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Correct answer: To limit eddy currents and the heat they cause

Thin insulated laminations leave little width for eddy currents to circulate.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 10.8: Practical Considerations - Transformers

Questions last reviewed: 18 October 2026

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