Created by StemPy LabThe field at the centre of a circular coil of radius cm is . What is the field on the axis of the coil, cm from its centre?
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← Two circular loops lie in the same plane with the same centre. The inner one has a radius of 9 cm and carries 6 A. The outer one has a radius of 15 cm and carries 8 A in the opposite sense. What is the size of the field at the centre?A long round wire of radius 6 mm carries a current spread evenly over its section. Outside the wire, at what distance from the axis is the field equal to the field at a point 4 mm from the axis inside the wire? →
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