Question

Mixture rules A 70% Cu-30% Zn brass electrical component has been made of powdered metal and contains 15 vol.% porosity. Assume that the pores are dispersed randomly. Given that the resistivity of 70% Cu-30% Zn brass is 62 n m, calculate the effective resistivity of the brass component using the simple conductivity mixture rule, Equation 2.32, and the Reynolds and Hough rule. (1 ) Pet=Pe (1-Xa) (Pa> 10p) [2.32] Mixture rule