Physics

Problem

A parallel-plate capacitor is completely filled with a dielectric material of constant

\kappa = 2.1

. The plates have an area of

25\,\text{cm}^2

and are separated by

1.0\,\text{mm}

. What magnitude of charge must be placed on each plate to produce an electric field of

2.0\times10^{4}\,\text{V\,m}^{-1}

between the plates? a)

4.4\times10^{-10}\,\text{C}

1.9\times10^{-9}\,\text{C}

9.3\times10^{-10}\,\text{C}

2.1\times10^{-10}\,\text{C}