What electrical phenomenon is specifically mitigated by lamination in induction coils?

Lamination in induction coils is specifically used to mitigate the phenomenon of eddy currents. Eddy currents are loops of electrical current that are induced within conductors by a changing magnetic field due to Faraday's law of electromagnetic induction. These currents can create significant energy losses in the form of heat, which reduces the efficiency of the induction coil.

By using laminated materials, the effective cross-sectional area for the flow of eddy currents is reduced, thus minimizing their magnitude. This is achieved because the laminated structure consists of thin sheets of conductive material separated by insulating layers, which disrupt the path of the eddy currents and contain them within each laminate, limiting their overall area and effect.

Laminated cores allow for improved efficiency by reducing these unwanted currents, which leads to lower resistive losses and better performance of the induction coils in electrical applications.