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A capacitor consists of two square metal plates of side 200 mm, separated by an air...

A capacitor consists of two square metal plates of side 200 mm, separated by an air space 2.0 mm wide. The capacitor is charged to a voltage of 200 V and a sheet of glass having a relative permittivity of 6 is placed between the metal plates immediately they are disconnected from the supply. Calculate: (a) the capacitance with air dielectric; (b) the capacitance with glass dielectric; (c) the voltage across the capacitor after the glass plate has been inserted; (d) the charge on the capacitor.

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