A certain capacitor has rectangular plates 56 cm by 24 cm, and the gap width is 0.20 mm. What is its capacitance? We see that typical capacitances are very small when measured in farads. A one-farad...

A certain capacitor has rectangular plates 56 cm by 24 cm, and the gap width is 0.20 mm. What is its capacitance? We see

that typical capacitances are very small when measured in farads. A one-farad capacitor is quite extraordinary! Apparently it

has a very large area A (all wrapped up in a small package), and a very small gap s.