Question

Find the capacitance of a parallel plate capacitor having plates of area 5.90 m² that are separated by 0.100 mm of teflon.

Answer 1

The capacitance of a parallel plate capacitor, with nothing between its plates, is given by

where , the permittivity of free space

When we introducea dielectric material, in this case teflon, the capacitance increases by a factor equal to the dielectric constant of the material .

Here, the dielectric constant of teflon is 2.1.

Putting in our values, we get