Question

$12$ positive charges each of magnitude q are placed on a circle of radius $R$ in a manner such that they are equally spaced. A charge $+Q$ is placed at the centre. If one of the charges q is removed, then the force on $Q$ is :

• A. zero
• B. $\frac{qQ}{4\pi {ϵ}_0{R}^2}$ away from the position of the removed charge
• C. $\frac{11qQ}{4\pi {ϵ}_0{R}^2}$ away from the position of the removed charge
• D. $\frac{qQ}{4\pi {ϵ}_0{R}^2}$ towards the position of the removed charge

Answer 1

Answer: (D)

Answer is D.