Determine the flux densities, Electrical Engineering

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In the magnetic circuit shown in Figure (a) the coil of 500 turns carries a current of 4 A. The air-gap lengths are g₁ = g₂ = 0.25 cm and g₃ = 0.4 cm. The cross-sectional areas are related such that A₁ = A₂ = 0.5A3. The permeability of iron may be assumed to be infinite. Determine the flux densities B₁, B₂, and B₃ in the gaps g₁, g₂, and g₃, respectively. Neglect leakage and fringing.

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