AIPMT PRELIMS 2009 Physics Potential due to Spherical Shells MCQ Question
Three concentric spherical shells have radii a, b and c (a < b < c) and have surface charge densities σ, -σ and σ respectively. If V_A, V_B and V_C denote the potentials of the three shells, then for c = a + b, we have:
V_C = V_B ≠ V_A
V_C ≠ V_B ≠ V_A
V_C = V_B = V_A
V_C = V_A ≠ V_B
Correct Answer
Detailed Explanation
For c = a + b, the potential V_A is equal to V_C due to the symmetry and charge distribution, while V_B is different due to the negative charge density on the middle shell.
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