A parallel plate capacitor has the aria of each plate of 20 cm², and the distance between plates is 1. 0 mm. The space between the plates is filled with a film of dielectric material whose dielectric constant is 30. The voltage between the plates is measured to be 9 V.
a) Calculate the charge stored in the capacitor and the electric field between the plates.
b) If the dielectric film is removed, what will the new voltage between the plates be?