\(Q_1 - q = Q_3 + Q_2 + q \,\,\, Q_1 - Q_2 - Q_3 = 2q\)
\(q\,\, = \,\frac{{{Q_1}\,\, - \,\,{Q_2}\,\, - \,\,{Q_3}}}{2}\)
તો \(a\) છેડાં પર વિદ્યુતભાર \( = \, {Q_1}\,\, - \,\,q \)
\( = \,\,{Q_1}\,\, - \,\,\frac{{{Q_1}\,\, - \,\,{Q_2}\,\, - \,\,{Q_3}}}{2}\,\, = \,\,\frac{{2{Q_1}\,\, - \,\,{Q_1}\,\, + \;\,{Q_2}\,\, + \,\,{Q_3}}}{2} = \frac{{{Q_1}\,\, + \;\,{Q_2}\,\, + \;\,{Q_3}}}{2}\)