hysteresis concept

Question

Hysteresis loop area represents?

RankGuru · Accepted Answer

1. **Concept**: Hysteresis refers to the 'lagging' of magnetization ($B$) behind the magnetizing force ($H$).
2. **Cycle**: When a ferromagnetic material is subjected to a complete cycle of magnetization and demagnetization, it traces a loop on the B-H curve.
3. **Power Loss**: Work must be done to shift domain boundaries against internal resistances (friction-like effects).
4. **Meaning of Area**: The area enclosed by the B-H loop corresponds to the **internal energy converted to heat** per unit volume of the material per cycle.
5. **Usage**: Soft iron (small area) is used for transformer cores to minimize these energy losses.

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hysteresis concept

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