Задача id13488

Determine the coefficient of self-induction of a coaxial formed by a coaxially located iron rod (m ~ 1000) and a copper tube (m ~ 1), closed at one end by a conducting disk. The length of the rod and tube is L = 10 cm, the diameter of the rod is 2r1 = 2 mm, the inner diameter of the tube is 2r2 = 9 mm, the outer diameter is 2r3 = 10 mm. Assume that the currents in the rod and tube are uniformly distributed over the cross sections.

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