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A long cylindrical wire has a radius equal to 2.2 cm and carries a current of...

A long cylindrical wire has a radius equal to 2.2 cm and carries a current of 75 A uniformly distributed over its cross-sectional area. Find the magnetic energy per unit length within the wire. (Use the following as necessary: π and μ0.)
U'm =  mJ/m

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Express the magnetic energy within the cylindrical annulus 2Ho Divide both sides of the equation by to express the magnetic e

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