A charge Q is distributed over two concentric hollow spheres of radius r and R (R > r), such that the surface densities of charge are equal. Find the potential at the common center.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
V = 
Sol.
(i) Let the charge on inner sphere = q
∴ charge on outer sphere = Q – q
(ii) ∴ σ 1 = σ 2
∴ 
or 
⇒ q = 
, Q – q = 
∴ Potential at center O
⇒ V 0 = 
R 
= 
= 
(R + r)
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