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# Four positive point chargers (+q) are kept at the four corners of a square of side 'l' . The net electric field at the midpoint of any one side of the square is , $\bigg( take\: \large\frac{1}{4 \pi \varepsilon_{\circ}} = K \bigg)$

$\begin {array} {1 1} (1)\;\large\frac{4Kq}{l^2} & \quad (2)\;\large\frac{16Kq}{5\sqrt 5.l^2} \\ (3)\;\large\frac{8Kq}{\sqrt 5.l^2} & \quad (4)\;\large\frac{Kq}{l^2} \end {array}$

(2) $\large\frac{16Kq}{5 \sqrt 5.l^2}$