The dimensions of electric field are

Force F experienced by a charge q in an electric field E is given by 

$F=qE or E= \frac{F}{q}$

 $$\begin{gathered} :. Dimensions of E = \frac{dimensions of F}{dimensions ofQ} =\frac{ML{T}^{-2}}{AT} \\ = ML{T}^{-3}{A}^{-1} \end{gathered}$$