IGNOU BPHCT 133 2026 - Discuss the B-H curve for a ferromagnet.

Question

Discuss the B-H curve for a ferromagnet.

19 Jan 2026

Answer :

Word Count : 286

The B–H curve of a ferromagnetic material represents the relationship between magnetic flux density (B) and magnetic field strength (H) when the material is subjected to a magnetizing field. Starting from an unmagnetized state, as the magnetic field strength is increased, the flux density increases rapidly at first due to the alignment of magnetic domains. This initial portion of the curve is nonlinear, showing that a small increase in H produces a large increase in B. As H continues to increase, the rate of increase of B gradually decreases and the curve

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