Question

The relative permittivity of a die electric is 2.25.(a) What is its permittivity (b) What will be the capacitance of this electric is inserted into a 7.8 air capacitor?

Answer 1

a)

$\varepsilon _r=\frac{\varepsilon_0}{\varepsilon_m}=3.93~\frac{pF}m,$

b)

$C'=\frac C{7.8}=0.13C.$