$12$ positive charges of magnitude $q$ are placed on a circle of radius $R$ in a manner 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
$12$ positive charges of magnitude $q$ are placed on a circle of radius $R$ in a manner 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
- [KVPY 2010]
- A
zero
- B
$\frac{q Q}{4 \pi \varepsilon_0 R^2}$ away from the position of the removed charge
- C
$\frac{11 q Q}{4 \pi \varepsilon_0 R^2}$ away from the position of the removed charge
- D
$\frac{q Q}{4 \pi \varepsilon_0 R^2}$ towards the position of the removed charge
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- [AIPMT 1995]