If four charges q₁=+1 10⁻⁸ C , q₂=-2 10⁻⁸ C , q₃=+3 10⁻⁸ C and q₄=+2 10⁻⁸ C are kept at the four corners of a square of side 1 m , then the electric potential at the centre of the square is

Step-by-step solution

aligned & q ₁=+1 10⁻⁸ C , q ₂=-2 10⁻⁸ C & q ₃=+3 10⁻⁸ C , q ₄=+2 10⁻⁸ C & a =1 ~m aligned r= 2 a 2 = a 2 = 1 2 ~m The electric potential at centre 0 is aligned & V ₀= k r ( q ₁+ q ₂+ q ₃+ q ₄ ) & 9 10^9 1 2 (1-2+3+2) 10⁻⁸ & =509 ~V 510 ~V aligned