In a parallel plate capacitor with air between the plates, each plate has an area of 6 x 10-3 m 2 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 each plate A=6×10−3m2 Distance between the plates d=3mm=0.003m Capacitance of capacitor C=dAϵo ∴ C=0.0036×10−3×8.85×10−12=17.7pF Voltage across the capacitor V=100 volts Thus charge on each plate Q=CV ∴ Q=17.7×10−12×100 ⟹ Q=1.77×10−9 C
