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← ScienceWhich mechanism inhibits domain wall motion within iron transformer cores?
A)Magnetic hysteresis energy dissipation
B)Increased reverse saturation current
C)Eddy current induced backfields✓
D)Decreased Bloch wall anisotropy
💡 Explanation
Eddy current induced backfields impede the domain wall motion where time-varying magnetic fields generate circulating currents. These currents induce opposing fields because Lenz's law opposes the changes in flux, therefore, slowing magnetization, rather than faster switching.
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