The core of a rotor on an AC generator is laminated to reduce:

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The core of a rotor in an AC generator is laminated primarily to reduce eddy current loss. Eddy currents are loops of electric current that are induced within the conductor due to changing magnetic fields, which causes energy dissipation in the form of heat. If the rotor were made from a solid piece of metal, these currents could flow freely, leading to significant energy loss.

Laminating the core involves using thin layers of conductive material separated by insulating layers. This structure restricts the flow of eddy currents, as the thin laminations provide higher resistance against the currents that would otherwise circulate in the core material. As a result, the overall efficiency of the generator improves, and the energy that would have been lost as heat due to eddy currents is minimized.

This approach is crucial for enhancing the performance and efficiency of AC generators, ensuring that they can generate electricity more effectively and with less wasted energy.

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