Three charge each of magnitude q are placed at the corners of an equilateral triangle , the electrostatic force on the charge placed at the centre is ( each side of triangle L).Their equilibrium is :

Options

A. Zero
B. `1/(4pi in_0) q^2/L^2`
C. `1/(4pi in_0)(3q^2)/L^2`
D. `1/(12pi in_0) q^2/L^2`

Answer

A