Physics

Problem

An air-filled parallel-plate capacitor has plate area

40\;\text{cm}^{2}

and plate separation

1.0\;\text{mm}

. What potential difference must be applied across the plates so that the capacitor stores

5.0\;\text{mJ}

of energy? (Use

\varepsilon_{0}=8.85\times10^{-12}\;\text{F/m}