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Which risk increases when the primary windings of a step-up transformer experience core saturation during increased current demands on secondary windings?

A)Decreased magnetomotive force produced
B)Increased electromagnetic interference emissions
C)Reduced impedance reflected from secondary
D)Lowered voltage transformation efficiency

💡 Explanation

Increased electromagnetic interference emissions result from saturation because further increases in current cannot increase the magnetic flux density within the transformer core given the mechanism of domain alignment. Therefore, the excess current manifests as wasted energy and harmonics, rather than amplified electromagnetic output.

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