Answer :

a) Given Area


Voltage V=12V


Separation between the plates d=2mm


Formula used :


Charge of the capacitor can be calculated as



The capacitance of the parallel plate capacitor is given by



Where,


C is the capacitance of the parallel plate capacitor


D is the separation between the capacitor plates


A is the area of a circular plate capacitor


ε₀ is the permittivity of the free space, ε₀=8.85×10-12 F/m







b) d is decreased to 1.0mm. We have to calculate the extra charge given by the battery to the positive plate.






Extra charge is =


Charge on the capacitor when d = 2mm is =


When d is decreased to 1.00 mm the extra charge given by the battery is =


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