Using mass (M), length (L), time (T) and current (A) as fundamental quantities, the dimension of permeability is
M-1LT-2 A
ML-2 T-2 A-1
MLT-2 A-2
[MLT -1A-1 ]
B=μ02π1r But, B=Fil (∴F=ilB) ∴Fil=μ02πir ∴μ0=Fi2