Question

A capacitor consists of two square metal plates, each measuring 5.00x10^-2 m on a side. In between the plates is a sheet of mica measuring 1,00x10^-4 m thick. What is the capacitance of this capacitor

Answer 1

The capacitance of the parallel plate capacitor

$$C=\frac{\kappa \epsilon_0 A}{d}\\ =\frac{5\times 8.85\times 10^{-12}\times (5.00\times 10^{-2})^2}{1.00\times 10^{-4}}=1.11\times 10^{-9}\;\rm F$$