Question: A long, cylindrical wire of radius a = 2 cm carries current I = 80 A uniformly distributed over its cross sectional area. Find the

A long, cylindrical wire of radius a = 2 cm carries current I = 80 A uniformly distributed over its cross sectional area. Find the magnetic energy per unit length within the wire.

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Consider a cylindrical annulus of thickness dr at a radius r a The field B is given by B 0 Ir 2 a ... View full answer

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