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← ScienceWhich outcome occurs when metallic iron nanoparticles agglomerate in a microwave?
A)Localized superheating and plasma formation✓
B)Uniform temperature distribution established quickly
C)Dielectric breakdown and material quenching
D)Resonant frequency shift in microwave source
💡 Explanation
Localized superheating occurs because **dipolar polarization** of the nanoparticles causes rapid re-orientation with the oscillating electric field. This generates intense heat at contact points and plasma locally, rather than a smooth distribution, therefore plasma formation is expected, rather than uniform heating.
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