The capacitance of a parallel-plate air capacitor can be calculated using the formula C = ε0A/d, where C is the capacitance, ε0 is the permittivity of free space (8.85 x 10^-12 F/m), A is the area of the plates, and d is the distance between the plates.
The unit of capacitance is farad (F), which is equivalent to coulomb per volt.
The capacitance is inversely proportional to the distance between the plates. This means that as the distance increases, the capacitance decreases.
Yes, the capacitance can be increased by increasing the area of the plates or by decreasing the distance between the plates.
Calculating the capacitance allows us to understand the amount of charge that can be stored in the capacitor and how it is affected by the distance and area of the plates. This knowledge is essential in designing and using electronic circuits and devices.