Lag1989 problem №18.25

Lag1989 problem №18.25

The solenoid with an iron core has a cross-sectional area S = 20 cm² and a number of turns N = 500. The inductance of a solenoid with a core at a current in the winding I = 5 A is equal to 0.28 H. Find the magnetic permeability of the iron core under these conditions.

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