Hysteresis Concept
Hysteresis loop area represents?
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About This Question
- Subject
- physics
- Chapter
- magnetic effects and magnetism
- Topic
- hysteresis concept
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
Energy lost per cycle
- Concept: Hysteresis refers to the 'lagging' of magnetization (B) behind the magnetizing force (H).
- Cycle: When a ferromagnetic material is subjected to a complete cycle of magnetization and demagnetization, it traces a loop on the B-H curve.
- Power Loss: Work must be done to shift domain boundaries against internal resistances (friction-like effects).
- 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.
- Usage: Soft iron (small area) is used for transformer cores to minimize these energy losses.
This hard difficulty physics question is from the chapter magnetic effects and magnetism, covering the topic of hysteresis concept. It appeared in the 2025 exam.
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