# 2.30 A spherical capacitor has an inner sphere of radius 12 cm and an outer sphere of radius 13 cm. The outer sphere is earthed and the inner sphere is given a charge of 2.5 . The space between the concentric spheres is filled with a liquid of dielectric constant 32.(a) Determine the capacitance of the capacitor.

The capacitance of the capacitor is given by:

Here,

Hence Capacitance of the capacitor is .

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