a) Calculate the capacitance of a parallel plate capacitor whose plates are 20 cm x 3.0 cm and are separated by a 1.0 mm air gap,
b) What is the charge on each plate if a 12 V battery is connected across the two plates?
c) What is the electric field between the plates?
d) Estimate the area of the plates needed to achieve a capacitance of 1 F, given the same air gap.