An iron ring of mean circumferential length 30 cm and cross-section 1 `cm^(2)` is wound uniformly with 300 turns of wire . When a current of `0.032` A
An iron ring of mean circumferential length 30 cm and cross-section 1 `cm^(2)` is wound uniformly with 300 turns of wire . When a current of `0.032` A flows in the windings , flux in the ring `2 xx 10^(-6) `Wb . Find the flux density in the ring , magnetising field intensity and relative permeability of iron.
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