40. High T Superconductor

A small sample of a type I superconductor will demonstrate the Meissner Effect (levitating a magnet) when cooled in liquid nitrogen.

Another example of superconductivity can be demonstrated using a type II superconductor.

A piece of superconducting material is cooled with liquid nitrogen on top of a track array of magnets. When the superconductor cools, it floats atop the magnetic array. If the track is turned upside down, the superconductor goes from being levitated to suspended due to flux pinning which freezes the magnetic flux within the type II superconductor.