In a regular polygon of `n` sides, each corner is at a distance `r` from the centre. Identical charges each of magnitude `q` are placed at corners. The field at the centre is

Options

A. 0
B. `((n-1)kQ)/(r^(2))`
C. `(m)/(n-1)k(Q)/(r^(2))`
D. `(n-1)/(n)k(Q)/(r^(2))` where, `k=1//4 pi epsilon_(0)`

Explanation

When each of the corners has a charge `Q`, the magnetic field at the centre of the hexagon is zero.