Question

A capacitor is constructed from two conductive metal plates 30cm x 50cm

which are spaced 6mm apart from each other, and uses dry air as its only

dielectric material. Calculate the capacitance of the capacitor. (0.221nF).

Answer 1

The capacitance of the parallel plates capacitor

$$C=\frac{\epsilon_0A}{d}$$

$$C=\frac{8.85*10^{-12}*0.3*0.5}{0.006}=2.21*10^{-10}\:\rm F=0.221\: n F$$