Four charges each equal to Q r placed at the four corners of square and a charge q is placed at the center of the square. Value of q is
Dear Bhakti, Answer your question is q/4(1+2root2). Clearing mention charge placed in equal distance and q at the centre which means in equilibrium. For getting full solving of this question you just visit Ncert book or you can just directly search on google you get an easy solution.