The most appropriate magnetization M versus m | vedclass

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(A) For a paramagnetic substance, the magnetization $M$ is directly proportional to the magnetising field $H$ at low fields and temperatures, followin

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$A$

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(A) For a paramagnetic substance, the magnetization $M$ is directly proportional to the magnetising field $H$ at low fields and temperatures, following Curie's Law: $M = \chi H$, where $\chi$ is the magnetic susceptibility.Since $\chi$ is a small positive constant for paramagnetic substances, the graph of $M$ versus $H$ is a straight line passing through the origin with a positive slope.Among the given options, curve $A$ represents a linear relationship with a positive slope, which is characteristic of paramagnetic materials.Therefore, the correct option is $A$.

The most appropriate magnetization $M$ versus magnetising field $H$ curve for a paramagnetic substance is

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