Question

The parallel plates of an air capacitor are separated by 2.25 mm.Each plate carries a charge of 6.50nC.The manitude of the electric field of the plates is 4.74x10^5V/m.Find the a) potential difference between he plates

b) capacitance and

c)area of the plate.

Answer 1

a)

$U=Ed=1067~V,$

b)

$C=\frac q U=6.1~pF,$

c)

$S=\frac{Cd}{\varepsilon_0}=15.5~cm^2.$