MotorsQuestion 206 of 1506

Why is silicon added to the steel of motor laminations?

It turns the steel into a permanent magnet
It lifts resistance and cuts eddy current
It raises the hysteresis loss of the steel
It makes the core conduct current better

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Correct answer: It lifts resistance and cuts eddy current

Silicon makes the alloy more resistive, which lowers the size of the eddy currents.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.1: Introduction to AC Motors

Questions last reviewed: 18 October 2026

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