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Question 31475
JEE Physics · Hard

Electrostatics: Potential MCQ

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PotentialHardQuestion 31475

Question

A hollow conducting sphere (inner radius R₁, outer R₂) with charge Q on it. Potential at r = R₁ (inner surface) is:
  1. A
    kQ/R₁
  2. B
    kQ/R₂
    Correct
  3. C
    Zero
  4. D
    kQ(1/R₁−1/R₂)

Correct answer

kQ/R₂

Explanation

All charge resides on outer surface (R₂). Potential is constant throughout conductor = kQ/R₂. So V at inner surface = kQ/R₂.

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