What size capacitor is required if it is to store energy of 0.001 J when it is fully charged by a 10 V DC supply? A parallel plate capacitor is formed by plates each of area 100 cm2 spaced 1 mm apart...

What size capacitor is required if it is to store energy of 0.001 J when it is fully charged by a 10 V DC supply?

A parallel plate capacitor is formed by plates each of area 100 cm2 spaced 1 mm apart in air. What is the capacitance? If a voltage of 1 kV is applied to the plates, what is the energy stored in the capacitor?