Copolymers were synthesized by condensation of p-cresol (p-C) and adipamide (A) with formaldehyde (F) in the presence of 2 M HCl as catalyst with varied molar ratios of reacting monomers. The electrical properties of p-CAF-I, p-CAF -II, p-CAF -III and p-CAF -IV copolymers were measured over a wide range of temperature (303-423 K). From the electrical conductivity of these copolymers, activation energies of electrical conduction have been evaluated and values lies in the range 4.35 x 10-20 – 7.15 x 10-20 J/K. The plots of log σ vs 103/T are found to be linear over a wide range of temperature, which indicate that the Wilson’s exponential law σ = σ0 exp(-E/kT) is obeyed. On the basis of above studies, these copolymers can be ranked as semiconductors.