Product Overview
The Faraday’s disk is, the earliest example of a DC electrical generator, also known as a homopolar generator. A copper disc with a turning handle rotates between two poles of a horseshoe magnet mounted on base with two terminals, one of which is connected to a pillar supporting the disc and the other to a brush bearing on edge of the disc. By turning the hand crank, an electrical current is generated, and the voltage difference can be detected by connecting a voltmeter to the terminals.
This is usually demonstrated together with the Barlow’s wheel Cat. Item No. G-577400, which is an early demonstration of a homopolar motor.
