A parallel plate capacitor is made from two metal plates of area 0.1 m2 and separated by an insulating layer of relative permittivity 1.5 and a thickness of 2 mm. There is an electrostatic field between the plates when this capacitor is connected to a d.c. voltage source of 12 V. Take the permittivity of free space to be 8.85 x 1012 Fm1. Calculate the energy stored and suggest methods for increasing this.

A parallel plate capacitor is made from two metal plates of area 0.1 m2 and separated by an insulating layer of relative permittivity 1.5 and a thickness of 2 mm. There is an electrostatic field between the plates when this capacitor is connected to a d.c. voltage source of 12 V. Take the permittivity of free space to be 8.85 x 1012 Fm1. Calculate the energy stored and suggest methods for increasing this.