Created by StemPy LabA thin metal disc lies at right angles to a field that changes at a steady rate. Eddy currents heat the disc at 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?
← All Quizzes
← A rectangular coil of 65 turns measures 7.0 cm by 5.5 cm. It starts with its normal along a uniform field of 0.42 T, and it is turned so that its normal is at 90° to the field in 0.095 s. What is the average emf?The sheets of a transformer core are 220 µm thick. The core is rebuilt with sheets of 110 µm 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? →
Discussion (0)
Log in to join the discussion.
Loading…