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Show Diagrammatically the Behaviour of Magnetic Field Lines in the Presence of Paramagnetic and Diamagnetic Substances. - Physics

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Show diagrammatically the behaviour of magnetic field lines in the presence of (i) paramagnetic and (ii) diamagnetic substances. How does one explain this distinguishing feature?

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Solution

(i) The behaviour of magnetic field lines in the presence of a diamagnetic substance is shown below:

(ii) The behaviour of magnetic field lines in the presence of a paramagnetic substance is shown below:

This distinguishing feature is because of the difference in their relative permeabilities. The relative permeability of the diamagnetic substance is less than 1; so, the magnetic lines of force do not prefer passing through the substance. The relative permeability of a paramagnetic substance is greater than 1; so, the magnetic lines of force prefer passing through the substance.

Concept: Magnetic Properties of Materials
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