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The electric potential at the centre of two concentric half rings of radii R 1 and R 2 , having same linear charge density λ is .

Options

  1. A2 λ ∈ 0
  2. Bλ 2 ∈ 0
  3. Cλ 4 ∈ 0
  4. Dλ ∈ 0

Correct answer

B. λ 2 ∈ 0

Step-by-step solution

V O = V 1 + V 2 ⇒ V O = 1 4 π ϵ 0 × λ 1 π R 1 R 1 + 1 4 π ϵ 0 × λ 1 π R 2 R 2 = λ 2 ϵ 0

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