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KVPY2012PhysicsElectrostatics

Consider three concentric metallic spheres A, B and C of radii a, b, c respectively where a < b < c , A and B are connected whereas C is grounded. The potential of the middle sphere B is raised to V then the charge on the sphere C is-

Options

  1. A-4 ₀ ~V bc c - h
  2. B-4 ₀ ~V ac c - a
  3. C+4 ₀ ~V bc c - b
  4. Dzero

Correct answer

A. -4 ₀ ~V bc c - h

Step-by-step solution

V _ B = kq b + k (- q ) c = V (Given) q = 4 ₀ bc c - b V Charge on C =- q

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