Subarea determination of the capacitance of cocentric annular-plate capacitors

The basic theory of calculation of the capacitance of a capacitor comprised of two cocentric annular plates by the method of (annular) subareas is advanced. Confirming the theory, excellent agreement results between the several available experimentally determined (by electrolytic tank) values for specifically dimensioned capacitors and corresponding calculated values. A family of universal curves is constructed. These afford, by inspection, values of capacitance over the range of geometry of interest in practice.