The electric potential at the centre of two concentric half rings of radii R$_1$ and R$_2$, having same linear charge density $\lambda$ is :

Question

$\frac{\lambda}{2\in_0}$

$\frac{\lambda}{\in_0}$

$\frac{2\lambda}{\in_0}$

$\frac{\lambda}{4\in_0}$

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