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The B-H curve (i) and (ii) shown in fig., associated with

1. (i) diamagnetic and (ii) paramagnetic substance
2. (i) paramagnetic and (ii) ferromagnetic substance
3. (i) soft iron and (ii) steel respectively
4. (i) steel and (ii) soft iron respectively

Correct answer: (i) paramagnetic and (ii) ferromagnetic substance

Solution

A paramagnetic substance has a small positive susceptibility, so its B-H curve rises only slightly and almost linearly. A ferromagnetic substance magnetizes much more strongly, giving a steep, nonlinear curve with saturation, which matches the second curve.

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