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Q.A charge QQ is distributed over two concentric hollow spheres of radii rr and RR (R>rR > r) such that the surface densities are equal. The potential at the common centre is (NEET 2022)

a
(Q1+Q2)(R+r)4πϵ0Rr\dfrac{(Q_1 + Q_2)(R + r)}{4\pi\epsilon_0 R r}
b
Q(R+r)4πϵ0(R2+r2)\dfrac{Q(R + r)}{4\pi\epsilon_0 (R^2 + r^2)}
c
Q4πϵ0(1r+1R)\dfrac{Q}{4\pi\epsilon_0} \left(\dfrac{1}{r} + \dfrac{1}{R}\right)
d
Zero

Correct Answer: Option C

The correct solution involves applying the fundamental concept to derive the final value step by step...

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