Physics

Problem

Which one of the following expressions gives the capacitance

C

of a parallel-plate capacitor of plate area

A

separated by distance

d

in vacuum? a)

\dfrac{2\,\varepsilon_0\,A}{d}

\dfrac{\varepsilon_0 A}{d}

\dfrac{\varepsilon_0 d^{2}}{A}

\dfrac{\varepsilon_0 A}{4\pi d}