question_answer 40)

  A ball of superconducting material is dipped in liquid nitrogen and placed near a bar magnet. (i) In which direction will it move? (ii) What will be the direction of it's magnetic moment?

Answer:

                  A 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. When it is placed near a bar magnet, it will be feebly magnetised opposite to the direction of magnetising field. Due to it, (i) it will be repelled, i.e., moving away from magnet (ii) its direction of magnetic moment will be opposite to the direction of magnetic field of magnet.