The magnetic cores of the solenoids retain a small amount of magnetism in the absence of a current, so that the rings repel and thus the movable rings turn. Because of the slip-ring device, they continue to turn, which leads to a voltage across the fixed rings.
(5K40.20) AC Generator
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The magnetic cores of the solenoids retain a small amount of magnetism in the absence of a current, so that the rings repel and thus the movable rings turn. Because of the slip-ring device, they continue to turn, which leads to a voltage across the fixed rings.
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