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NEET2002PhysicsElectrostaticsActual

A conducting sphere of radius 10 ~cm is charged with 10 C . Another uncharged sphere of radius 20 ~cm is allowed to touch it for some time. After that if the spheres are separated, then surface density of charges on the spheres will be in the ratio of

Options

  1. A1: 4
  2. B1: 2
  3. C1: 3
  4. D1: 1 .

Correct answer

B. 1: 2

Step-by-step solution

Radius of conducting sphere (R₁ )=10 ~cm charge on the conducting sphere =10 C and radius of uncharged sphere (R₂ )=20 ~cm For a spherical conductor, the density of charge is proportional to its radius. Therefore ratio of density of charges of the spheres will be 1: 2 .

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