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MHT CET202016 Oct 2020Morning ShiftPhysicsElectrostaticsActual

Surface density of charge on a charged conducting sphere of radius 'R' in terms of electric intensity 'E' at a distance 'r' in free space is ( r > R , E ₀= . permittivity of free space )

Options

  1. A₁ ₀ E R r
  2. Bv² ₀ E ( r R )²
  3. Cx₃ ₀ E r R
  4. Dx⁴ ₀ E ( R r )²

Correct answer

B. v² ₀ E ( r R )²

Step-by-step solution

E= 1 4 ₀ Q r² = 1 4 ₀ 4 R² r² = R² ₀ r² =E ₀ ( r R )²

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