\( = \,\,\frac{1}{2}\,\,\left[ {{C_1}\,\, + \;\,{C_2}\,\, + \;\,{C_3}\,\, + \;\,..............{C_n}} \right]{V^2}\)
\({C_1}\,\, = \,\,{C_2}\,\, = \,\,{C_3}................\,\, = \,{C_n};\,\,\,\,\,\)
\(U\,\, = \,\,\frac{1}{2}\,\,[C\,\, + \;\,C\,\, + \;\;C\,\,................]{V^2} = \,\,\,\,\frac{1}{2}\,\,nC{V^2}\)