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Which consequence results excessive grain boundary current in electrical steel?

A)Increased hysteresis losses
B)Reduced core permeability
C)Enhanced magnetic saturation
D)Decreased eddy current losses

💡 Explanation

Grain boundary current impedes the domain wall motion, because it causes localized heating through increased resistance and subsequent magnetic domain pinning due to increased temperature; therefore hysteresis losses increases rather than permeability because domain alignment gets disrupted.

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