© 2020 Author(s).In this study, some selected states of p- and sd-hells namely 10B, 6Li, and 29Si nuclei were conducted, the transvers and longitudinal electron scattering form factors were studied in consideration of the configuration with higher excitation energy above the cores 4He and 16O. When using a microscopical theory, the effect of high-configuration outside the model space (Core-polarization (CP)) is included. Cohen-Kurath interaction for p-shell, Wildenthal's standard interaction for sd-shell. For core polarization calculations higher energy excitations up to 4 are considering. The addition of CP effects greatly improves the form factors calculations and explains the measured data as dependence of momentum transfer very well.