Question

A ball of superconducting material is dipped in liquid nitrogen place near a bar magnet in which direction will it move? & what will be the direction of its magnetic moment

Answer 1

Hi,

Both the superconducting material and nitrogen are diamagnetic in nature. When a ball of superconducting material is dipped in liquid nitrogen, it behaves as a diamagnetic material. As it has been placed near the bar magnet, so it will get feebly magnetised in the direction opposite to the magnetising field. As a result, it will be repelled and move away from the magnet. Its direction of magnetic moment will be opposite to the direction of magnetic field of the magnet.