Which material property causes hysteresis losses in each magnetic cycle of a transformer core?

💡 Explanation

When the magnetic field alternates in a transformer core, retentivity causes hysteresis because the material resists changes in its magnetization state, dissipating energy as heat during each cycle. Therefore, retentivity is the primary cause of hysteresis losses, rather than reluctance, permeability, or coercivity which relate to different magnetic characteristics.

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