Let (ε0) denote the dimensional formula for the permittivity of the vacuum, and (µ0) that of the permeability of the vacuum. If M = mass, L = length, T = time and A = electric current.

$\left[\varepsilon_0\right]\left[M^{-1} L^{-3} T^2 A\right]$ $\left[\varepsilon_0\right]\left[M^{-1} L^{-3} T^4 A^2\right]$ $\left[\varepsilon_0\right]\left[M L T^{-2} A^{-2}\right]$ $\left[\varepsilon_0\right]\left[M^{-1} L^{-3} T^{-2} A\right]$

$\left[\varepsilon_0\right]\left[M^{-1} L^{-3} T^4 A^2\right]$