Permittivity of free space \\\\(\\epsilon_o = \\dfrac{q_1q_2}{4\\pi Fr^2}\\\\)Dimensions of \\\\([F] = [MLT^{-2}]\\\\)Dimensions of \\\\([q] = [AT]\\\\)Dimensions of \\\\([r] = [L]\\\\)Thus dimensional formula of \\\\([\\epsilon_o] = \\dfrac{[AT][AT]}{[MLT^{-2}][L^2]}\\\\)\\\\(\\implies\\\\) \\\\([\\epsilon_o] = [M^{-1}L^{-3} T^4A^2]\\\\)