CAPACITORS 1. Calculate the capacitance of a parallel-plate capacitor whose plate are 20 cm x 3.0 cm and are separated by a 1.0 mm air gap. 2_ What is the charge on each plate if a 12V battery is connected across the two plates? * 5. What is the electric field between the plates? * 4, Estimate the area of the plates needed to achieve a capacitance of 1 F, assuming the air gap d is 100 times smaller or 10 microns (1micron =1um=1x10"-6m)* 5. An 8500 pF capacitor holds plus and minus charges of 16.5 x 10"8 C. What is the voltage across the capacitor? * 6. A 0.20 F capacitor is desired. What area must the plates have if they are to be separated by a 3.2 mm air gap?* 7_ If a capacitor has opposite 4.2 uC charges on the plates, and an electric field of 2 kV/mm is desired between the plates, what must each plates area be?*