Created by StemPy LabThe sheets of a transformer core are thick. The core is rebuilt with sheets of and run at twice the frequency. At the same time the peak field is cut to one third. By what factor does the eddy-current loss in each cubic metre change?
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← A thin metal disc lies at right angles to a field that changes at a steady rate. Eddy currents heat the disc at 3.3 W. A second disc is made of the same metal. It has twice the radius and a quarter of the thickness, and lies in the same changing field. At what rate is it heated?A magnet of mass 0.062 kg falls through an aluminium tube 0.95 m long. It moves at a steady speed of 0.069 m/s all the way. How much heat do the eddy currents make in the tube during the passage? Take g = 9.8 m/s². →
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