Question

derive on expression for capacity pqralled plate capacitor.​

Answer 1

Explanation:

Let the two plates are kept parallel to each other separated be a distance d and cross-sectional area of each plate is A.

Electric field by a single thin plate E′=2ϵoσ

Capacitance C=VQ.

Thus we get capacitance of parallel plate capacitor C=dAϵo.