Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 128
Fig. 85 Fig. 86 will be rotated in the same direction as the disk. If, how-ever, the magnet is held in position and the disk is rotated, agreater force must be applied to cause the disk to rotate thanis required when the magnet is free to turn. Currents induced in masses of metal that are moved in…
Electrical engineering
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