The dimension of (1)/(2) _0 E^2 , where _0 is permittivity of free...

\begin{aligned} & \text{ Dimensions of } \varepsilon_0=\left[\mathrm{M}^{-1} \mathrm{~L}^{-3} \mathrm{~T}^4 \mathrm{~A}^2\right] \\ & \text{ Dimensions of } \mathrm{E}=\left[\mathrm{MLT}^{-3} \mathrm{~A}^{-1}\right] \\ & \therefore \text{ Dimensions of } \frac{1}{2} \varepsilon_0 \mathrm{E}^2=\left[\mathrm{M}^{-1} \mathrm{~L}^{-3} \mathrm{~T}^4 \mathrm{~A}^2\right] \\ & \quad=\left[\mathrm{ML}^{-1} \mathrm{~T}^{-3}\right] \quad \times\left[\mathrm{M}^2 \mathrm{~L}^2 \mathrm{~T}^{-6} \mathrm{~A}^{-2}\right] \end{aligned}