A Rowland ring of mean radius 15 cm has 4500 turns of wire wound on a ferromagnetic core of relative permeability 800. Find the

A Rowland ring of mean radius 15 cm has 4500 turns of wire wound on a ferromagnetic core of relative permeability 800. Find the magnitnde of the magnetic field in the core for a magnetising current of 1.2 A.

A Rowland ring of mean radius 15 cm has 4500 turns of wire wound on a ferromagnetic core of relative permeability 800. Find the magnitnde of the magne

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