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COMEDK202510 May 2025Evening ShiftPhysicsElectrostaticsActual

When a metallic spherical shell of radius 20 cm is charged, the potential on its surface is found to be 5 V . The potential at a point 10 cm from the centre of the spherical shell is :

Options

  1. A5 V
  2. B1.5 V
  3. C10 V
  4. D2.5 V

Correct answer

A. 5 V

Step-by-step solution

For a charged metallic spherical shell of radius R , the electric potential V at any point inside the shell (at a distance r The potential at the surface is given as V_ surface = 5 V, where R = 20 cm. Since the point at 10 cm from the centre lies inside the shell ( r = 10 cm Therefore, the potential at 10 cm from the centre is 5 V. Answer: 5 V

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