Precise calculation of electrical capacitance by means of quadruple integrals in method of moments technique

In this paper, the capacitance of a parallel plate air-gap rectangular capacitor, and unit cube capacitor have been calculated. Because its generality simplicity, method moments (MOM) Technique is utilized. order to improve accuracy calculations, use quadratic integrals instead binary has proposed. A neat form provided for analytical solution required moment. The results show that there very small error in calculating capacity even with coarse boundary division. described formulas codes can easily be used similar purposes.