A charge q is located at the centre of a cube. The electric flux through any face is
${{2\pi q} \over {6\left( {4\pi {\varepsilon _0}} \right)}}$
${{4\pi q} \over {6\left( {4\pi {\varepsilon _0}} \right)}}$
${{\pi q} \over {6\left( {4\pi {\varepsilon _0}} \right)}}$
${q \over {6\left( {4\pi {\varepsilon _0}} \right)}}$
