Five point charges, each of value +q coul, are placed on five vertices of a regular hexagon of isde L meters. The magnitude of the force on the point charge of value -q coul, placed at the centre of the hexagen is…………….

Answer: A::B::DSolution:
Force on $\left(-q\right)$ due to charge at D will get cancelled out by force on $\left(-q\right)$ due to change on A. ismilarly force on $-q$ due to charge at E will get cancelled out due to charge on B. So the net force will be because on C $F=\frac{1}{4\pi {\in }_0}\frac{q^2}{L^2}$ directed from O to C.