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← ScienceWhich fundamental effect increases in a transformer core when frequency nears ferromagnetic resonance?
A)Hysteresis losses heat excessively✓
B)Eddy currents generate back EMF
C)Increased blocking of magnetic domains
D)Magnetostriction induces physical distortion
💡 Explanation
Increased frequency toward ferromagnetic resonance causes significant hysteresis losses because the domain switching struggles to keep up with the field reversals; therefore losses heat the core excessively rather than eddy currents or magnetostriction, which are distinct phenomena.
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