4. 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 reluctance of the ring (ii) the current required to produce a flux of 800 μWb in the ring. Assume relative permeability of mild steel to be 380 at the flux density developed in the core.
4. 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 reluctance of the ring (ii) the current required to produce a flux of 800 μWb in the ring. Assume relative permeability of mild steel to be 380 at the flux density developed in the core.
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Transcribed Image Text:4. 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 reluctance of the ring (ii)
the current required to produce a flux of 800 µWb in the ring. Assume relative permeability
of mild steel to be 380 at the flux density developed in the core.
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