Essential Physics Demo: Faraday's Disk

Grab and hold students' attention with these interactive and affordable demonstrations that show core physics concepts in action.

Ideal for jump starting your unit with exciting visual impact, or for reinforcing key concepts after a lesson, these apparatus are quick and easy to set up to save you time in the classroom. Demos are available for all fundamental physical science topics, and include detailed instructions.

Students are used to seeing voltage induced by a coil of wire spun in a magnetic field; now let them see how a solid disk can produce the same results. Potential difference is induced as a 15 cm copper disk is spun through a pair of strong magnets. Required but not included: a multimeter that can measure in the mV range.