A sphere of `4 cm` radius is suspended within a hollow sphere of `6 cm` radius. The inner sphere is charged to potential `3` e.s.u. and the outer sphere is earthed. The charge on the inner sphere is

A sphere of 10 cm diameter is suspended within a hollow sphere of 12 cm diameter. If the inner sphere be charged to a potential of 15,000 V and the outer sphere be earthed, the charge on the inner sphere is

A sphere of radius 0.03m is suspended within a hollow sphere of radius 0.05m . If the inner sphere is charged to a potential of 1500 volt and outer sphere is earthed. Find the capacitance and the charge of the inner sphere.

A sherical capacitor has an inner sphere of radius 12 cm and an outer spere of radius 13 cm . The outer sphere is earthed, and the inner sphere is given a charge of 2.5 muC . The space between the concentric spjheres is filled with a liquid of dielectric caonstant 32 . Determine the potential of the inner sphere.

A spherical capacitor has an inner sphere of radius 12 cm and an outer sphere of radius 13 cm. The outer sphere si earthed and the inner sphere is given a charge of 2.5 muC . The space between the concentric spheres is filled with a liquid of dielectric constant 32. (a) Determine the capacitance of the capacitor. (b) What is the potential of the inner sphere ? (c) Compare the capacitance of this capacitor with that of an isolated sphere of radius 12 cm.Explain why the latter is much smaller ?

A hollow metal sphere of radius 5 cms is charged such that the potential on its surface is 10 volts. The potential at the centre of the sphere is

A hollow metal sphere of radius 5 cm is charged such that the potential on its surcace is 10V . The potential at the centre of the centre of the sphere is -

A hollow metal sphere of radius 10 cm is charged such that the potential on its surface is 5 V. What is the potential at the centre of the sphere?