2.8) In a parallel plate capacitor with air between the plates, each plate has an area of and the distance between the plates is 3 mm. Calculate the capacitance of the capacitor. If this capacitor is connected to a 100 V supply, what is the charge on each plate of the capacitor?
Area of the capacitor plate =
Distance between the plates
Capacitance of the parallel plate capacitor is
= permittivity of free space =
putting all know value we get,
Hence capacitance of the capacitor is 17.71pF.
Charge on the plate of the capacitor :
Hence charge on each plate of the capacitor is .