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INDUCED EMF: ALUMINUM RINGS ON FIELD GENERATOR
Solid Ring Floats, Cut Ring Doesn't
The coil is driven by AC, so the magnetic field is constantly changing, inducing an EMF in the rings. The resulting current in the solid ring produces a magnetic field that opposes the generator field. The cut ring has no current, thus no magnetic field.
Copyright:© 1998 Richard Megna - Fundamental Photographs
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