Question

a sheet of polythene(er=1.3) and 0.5mm thickis to be used in capacitor by sandwiching it two sheet of aluminum foil.what area must sheets have if the capacitor is to have a capacitance of 5micro farad?Eo=8.85*10"-12F/M

Answer 1

$$A=\dfrac{Cd}{\epsilon_0\epsilon_r}=217.2\text{ m}^2.$$