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

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

\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}

(b)

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

(c)

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

(d)

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