A hollow metal sphere of radius 10cm is charged such that the potential on its surface becomes 80V. The potential at the centre of the sphere is?
A hollow metal sphere of radius 20 cm is charged such that the potential on its surface is 120 Volt. The potential at the centre of the sphere is
A hollow metal sphere of radius 10 cm is charged such that the potential on its surface is 80 volt. The potential at the centre of the sphere is