Equal charges Q are placed at the four corners A, B, C, D of a square of length a. The magnitude of the force on the charge at B will be

Options

A. `(3q^(2))/(4 pi epsi_(0)a^(2))`
B. `(q^(2))/(4 pi epsi_(0)a^(2))`
C. `((1 + 2 sqrt2)/(2)) (q^(2))/(4 pi epsi_(0) a^(2))`
D. `(2 + (1)/(sqrt2)) (q^(2))/(4 pi epsi_(0)a^(2))`

Answer

C