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Which electric motor consequence occurs when operating past temperature limits?

A)Magnetic field strength decreases rapidly
B)Increased armature winding superconductivity occurs
C)Improved efficiency diminishes the back-EMF
D)Commutator spark erosion forms thicker deposits

💡 Explanation

Elevated winding temperature causes reduced performance because the Curie temperature is approached, initiating thermal demagnetization; therefore, field strength drops noticeably, rather than increasing conductivity or erosion below the threshold.

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