Find the dimensional formula of potential $V$.

I the electric current, t the time and U the energy.

$U=V I t$

$$\begin{gathered} \therefore V=\frac{U}{It} \\ or \\ \left[V\right]=\frac{\left[U\right]}{\left[I\right]\left[t\right]}=\frac{\left[{\mathrm{ML}}^2{ \mathrm{T}}^{-2}\right]}{\left[\mathrm{A}\right]\left[\mathrm{T}\right]}=\left[{\mathrm{ML}}^2{ \mathrm{T}}^{-3}{ \mathrm{A}}^{-1}\right] \end{gathered}$$