Question: A toroidal core has a rectangular cross section defined by the surfaces = 2 cm, = 3 cm, z = 4 cm, and

A toroidal core has a rectangular cross section defined by the surfaces ρ = 2 cm, ρ = 3 cm, z = 4 cm, and z = 4.5 cm. The core material has a relative permeability of 80. If the core is wound with a coil containing 8000 turns of wire, find its inductance.

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