Three solenoid coils of same dimension, same number of turns and same number of layers of windings are taken. Coil 1 with inductance L₁ was wound using a Mn wire of resistance 11 Ω/m, coil 2 with inductance L₂ was wound using the similar wire but the direction of winding was reversed in each layer; coil 3 with inductance L₃ was wound using a superconducting wire. The self inductance of the coils L₁, L₂, L₃ are

The self-inductance of a coil $\mathrm{L} = {\mathrm{\mu }}_0{\mathrm{n}}^2\mathrm{Al}$ where
μ₀ = permeability of air,
n = number of turns per unit length,
A = Area of cross-section and
l = length of the solenoid
This depends on the geometry of the inductor such as cross-sectional area, length and number of turns and not on the material, even if it
is made of a super conducting material. If the superconductor is below the critical temperature, the current will continuously flow and the inductance may not have the property of inductance any more. $\therefore L_1 = L_2; L_3= 0.$