The cross-sectional area of a solenoid with an iron core is 10 cm^2. Find the magnetic permeability of the core material under such conditions when the magnetic flux penetrating the cross-sectional area of the solenoid is 1.4 * 10^-3 Wb. Find what strength of current flowing through the solenoid this magnetic flux corresponds to, if it is known that the inductance of the solenoid under these conditions is 0.44 H. The length of the solenoid is 1 m.
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