A large electromagnet, with a movable iron core, is energized with AC power. An aluminum ring, placed over the extended core, is propelled upwards by about two feet when the coil is suddenly energized. The ring will also be levitated around the core if the power is left on.

WARNING Rings left on the energized core will heat considerably!

This demo can be found in cabinet F on shelf 4 of the UCSD PUL Demo Room (WLH 2015).