\(\varepsilon_0=\frac{1}{4 \pi F } \frac{ v _1 v _2}{ r ^2}\left( F = MLT ^{-2}\right)\)
\(\varepsilon_0=\frac{1}{ MLT ^{-2}} \frac{ LAT \times AT }{1^2}\)
\(= M ^{-1} L ^{-3} t ^4 A ^2\)
Dimension of \(\mu_0\)
\(N / A ^2\) or \(WbA A ^{-1} m ^{-1}\)
\(=[ M ][ L ][ T ]^{-2}[ A ]^{-2}\)