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Three concentric spherical shells have radii a, b and c (a<b<c) and have surface charge densities σ,-σ and σ respectively. If VA, VB and VC denote the potential of the three shells, then for c = a + b we have 

a
VC=VA≠VB
b
VC=VB≠VA
c
VC≠VB≠VA
d
VC=VB=VA

detailed solution

Correct option is A

Consider shell theorem.

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Similar Questions

Two spherical shells are as shown in figure.

Let r be the distance of a point from their common centre.  Then, match the following columns and mark the correct choice from the given codes.

 Column-I Column-II
i.Electric field for r < R1p.is constant for q2 and vary for q1
ii.Electric potential for r < R1q.is zero for q2 and vary for q1
iii.Electric potential for R1 < r <R2r.is constant
iv.Electric field for R1 < r <R2s.is zero

Codes:


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