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NEET2021PhysicsElectrostaticsActual

Two charged spherical conductors of radius R 1 and R 2 are connected by a wire. Then the ratio of surface charge densities of the spheres σ 1 / σ 2 is :

Options

  1. AR 1 R 2
  2. BR 2 R 1
  3. CR 1 R 2
  4. DR 2 R 1

Correct answer

B. R 2 R 1

Step-by-step solution

V 1 = V 2 k q 1 R 1 = k q 2 R 2 σ 1 4 π R 1 2 R 1 = σ 2 4 π R 2 2 R 2 σ 1 σ 2 = R 2 R 1

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