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Which mechanism causes transformer core saturation during significant DC current imbalance in the primary winding?

A)Increased hysteresis losses in the core
B)Eddy current reduction of the magnetic field
C)Net magnetic flux accumulation in core
D)Capacitive coupling between windings

💡 Explanation

When a DC imbalance exists in the primary winding, it induces a net DC magnetic field in the core, accumulating magnetic flux because the effect is cumulative over time. Therefore, core saturation results, rather than hysteresis increases, eddy current reductions, or capacitive coupling, each having distinct root causes.

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