A parallel plate capacitor has a capacitance of 2.0 F and plate separation of 1.0 mm. (a)

Question:

A parallel plate capacitor has a capacitance of 2.0 μF and plate separation of 1.0 mm.
(a) How much potential difference can be placed across the capacitor before dielectric breakdown of air occurs (Emax = 3 × 106 V/m)?
(b) What is the magnitude of the greatest charge the capacitor can store before breakdown?