Assume the relative permeability of mild steel to be 380.

Posted on 2014-01-23 14:32:00 in Engineering by HARYATI

A mild-steel ring having a cross-sectional area of 5 cm² and a mean circumference of 40 cm has a coil of 200 turns wound uniformly around it. Calculate (i) the flux density (ii) the reluctance of the ring and (iii) the current required to produce a flux of 800 micro-weber in the ring. Assume the relative permeability of mild steel to be 380.

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