Suppose a small cylinder of a paramagnetic su | vedclass

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(C) When a paramagnetic substance is placed in a magnetic field,it develops a magnetic moment in the direction of the field,effectively becoming a mag

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Attract when they are placed such that their axis is common as well as when they are placed side by side

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(C) When a paramagnetic substance is placed in a magnetic field,it develops a magnetic moment in the direction of the field,effectively becoming a magnet with poles that reinforce the external field. Conversely,a diamagnetic substance develops a magnetic moment opposite to the direction of the field,effectively becoming a magnet with poles that oppose the external field. When placed between the pole pieces of a strong magnet,the paramagnetic cylinder concentrates the magnetic field lines within itself,while the diamagnetic cylinder expels them. Because the paramagnetic material acts as a source of magnetic flux and the diamagnetic material acts as a sink (or repeller) of magnetic flux,their induced poles at the adjacent faces will be opposite in nature. Specifically,the face of the paramagnetic cylinder near the diamagnetic one will develop a pole that attracts the induced pole of the diamagnetic cylinder. Therefore,they will attract each other regardless of whether they are placed with a common axis or side by side,as the induced magnetic moments always result in an attractive force between the two distinct types of materials in this configuration.

Suppose a small cylinder of a paramagnetic substance and a small cylinder of a diamagnetic substance are placed between the (parallel) pole pieces of a strong magnet,so that they are aligned along the direction of the field lines. Will they attract or repel each other?

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