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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.

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