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Dynamo 6: Faraday Disc Dynamo

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This is part of a serie of 12 videos to introduce self-excited dynamo action.
Video #6 of 12
A modified version, introduced by Michael Faraday, allows to produce a continuous electrical current (and thus a non-oscillating magnetic field). A conducting (but non-magnetic) copper disc is rotated in a strong horse-shoe magnet. Electrical contacts allowing motion of the disc are established both on the axis and at the rim of the disc. As the disc rotates, a difference of potential (or an electrical current) is measured in the wire.
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