Lenz's Law Apparatus, 1 Each

The Lenz's Law Apparatus by United Scientific is a classroom demonstration of electromagnetic induction: an aluminum arm on a pointed pivot with one solid and one slit aluminum loop. A magnet moved toward the solid loop pushes it away, while the slit loop does not move. Physics teachers use it to introduce Lenz's law and eddy currents. Magnets are sold separately; an activity guide is included.