Four identical charges Q are fixed at the four corners of a square of side a. Show that the net electric field at a point P located symmetrically at a distance a / √2 from the centre of the square is Q / (√2 pie ε0 a 2 ).
Four identical charges Q are fixed at the four corners of a square of side a. Show that the net electric field at a point P located symmetrically at a distance a / √2 from the centre of the square is Q / (√2 pie ε0 a 2 ).