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Which mechanism causes increased hysteresis losses when a ferromagnetic core transformer operates at higher frequencies?

A)Increased domain wall displacement lag
B)Eddy current flow impeding magnetization
C)Flux linkage limitation in windings
D)Dielectric breakdown of core insulation

💡 Explanation

When frequency increases, the magnetic domains within the core switch direction more rapidly because the applied field changes, resulting in increased lag of domain wall displacement due to material properties. Therefore, increased hysteresis losses result, rather than eddy current effects, flux limitations, which require other mechanisms.

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