A Rowland ring of mean radius 15 cm has 3500 turns of wire wound on a ferromagnetic core of relative permeability 800. What is the magnetic field B in the core for a magnetising current of 1.2 A?

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Mean radius of a Rowland ring, r = 15 cm = 0.15 m Number of turns on a ferromagnetic core, N = 3500 Relative permeability of the core material, Magnetising current, I = 1.2 A The magnetic field is given by the relation: B Where, μ0 = Permeability of free space = 4π × 10−7 Tm A−1 Therefore,...
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Mean radius of a Rowland ring, r = 15 cm = 0.15 m Number of turns on a ferromagnetic core, N = 3500 Relative permeability of the core material, Magnetising current, I = 1.2 A The magnetic field is given by the relation: B Where, μ0 = Permeability of free space = 4π × 10−7 Tm A−1 Therefore, the magnetic field in the core is 4.48 T. read less
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